Commit Graph

296630 Commits

Author SHA1 Message Date
Andrew Morton
cab6b05600 selftests/Makefile: make run_tests' depend on all'
So a "make run_tests" will build the tests before trying to run them.

Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:37 -07:00
Frederic Weisbecker
f467f71403 selftests: launch individual selftests from the main Makefile
Remove the run_tests script and launch the selftests by calling "make
run_tests" from the selftests top directory instead.  This delegates to
the Makefile in each selftest directory, where it is decided how to launch
the local test.

This removes the need to add each selftest directory to the now removed
"run_tests" top script.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:37 -07:00
Konstantin Khlebnikov
0fc9d10403 radix-tree: use iterators in find_get_pages* functions
Replace radix_tree_gang_lookup_slot() and
radix_tree_gang_lookup_tag_slot() in page-cache lookup functions with
brand-new radix-tree direct iterating.  This avoids the double-scanning
and pointer copying.

Iterator don't stop after nr_pages page-get fails in a row, it continue
lookup till the radix-tree end.  Thus we can safely remove these restart
conditions.

Unfortunately, old implementation didn't forbid nr_pages == 0, this corner
case does not fit into new code, so the patch adds an extra check at the
beginning.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Tested-by: Hugh Dickins <hughd@google.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:37 -07:00
Konstantin Khlebnikov
cebbd29e1c radix-tree: rewrite gang lookup using iterator
Rewrite radix_tree_gang_lookup_* functions using the new radix-tree
iterator.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Tested-by: Hugh Dickins <hughd@google.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:37 -07:00
Konstantin Khlebnikov
78c1d78488 radix-tree: introduce bit-optimized iterator
A series of radix tree cleanups, and usage of them in the core pagecache
code.

Micro-benchmark:

lookup 14 slots (typical page-vector size)
in radix-tree there earch <step> slot filled and tagged
before/after - nsec per full scan through tree

* Intel Sandy Bridge i7-2620M 4Mb L3
New code always faster

* AMD Athlon 6000+ 2x1Mb L2, without L3
New code generally faster,
Minor degradation (marked with "*") for huge sparse trees

* i386 on Sandy Bridge
New code faster for common cases: tagged and dense trees.
Some degradations for non-tagged lookup on sparse trees.

Ideally, there might help __ffs() analog for searching first non-zero
long element in array, gcc sometimes cannot optimize this loop corretly.

Numbers:

CPU: Intel Sandy Bridge i7-2620M 4Mb L3

radix-tree with 1024 slots:

tagged lookup

step  1      before  7156        after  3613
step  2      before  5399        after  2696
step  3      before  4779        after  1928
step  4      before  4456        after  1429
step  5      before  4292        after  1213
step  6      before  4183        after  1052
step  7      before  4157        after  951
step  8      before  4016        after  812
step  9      before  3952        after  851
step  10     before  3937        after  732
step  11     before  4023        after  709
step  12     before  3872        after  657
step  13     before  3892        after  633
step  14     before  3720        after  591
step  15     before  3879        after  578
step  16     before  3561        after  513

normal lookup

step  1      before  4266       after  3301
step  2      before  2695       after  2129
step  3      before  2083       after  1712
step  4      before  1801       after  1534
step  5      before  1628       after  1313
step  6      before  1551       after  1263
step  7      before  1475       after  1185
step  8      before  1432       after  1167
step  9      before  1373       after  1092
step  10     before  1339       after  1134
step  11     before  1292       after  1056
step  12     before  1319       after  1030
step  13     before  1276       after  1004
step  14     before  1256       after  987
step  15     before  1228       after  992
step  16     before  1247       after  999

radix-tree with 1024*1024*128 slots:

tagged lookup

step  1      before  1086102841  after  674196409
step  2      before  816839155   after  498138306
step  7      before  599728907   after  240676762
step  15     before  555729253   after  185219677
step  63     before  606637748   after  128585664
step  64     before  608384432   after  102945089
step  65     before  596987114   after  123996019
step  128    before  304459225   after  56783056
step  256    before  158846855   after  31232481
step  512    before  86085652    after  18950595
step  12345  before  6517189     after  1674057

normal lookup

step  1      before  626064869  after  544418266
step  2      before  418809975  after  336321473
step  7      before  242303598  after  207755560
step  15     before  208380563  after  176496355
step  63     before  186854206  after  167283638
step  64     before  176188060  after  170143976
step  65     before  185139608  after  167487116
step  128    before  88181865   after  86913490
step  256    before  45733628   after  45143534
step  512    before  24506038   after  23859036
step  12345  before  2177425    after  2018662

* AMD Athlon 6000+ 2x1Mb L2, without L3

radix-tree with 1024 slots:

tag-lookup

step  1      before  8164        after  5379
step  2      before  5818        after  5581
step  3      before  4959        after  4213
step  4      before  4371        after  3386
step  5      before  4204        after  2997
step  6      before  4950        after  2744
step  7      before  4598        after  2480
step  8      before  4251        after  2288
step  9      before  4262        after  2243
step  10     before  4175        after  2131
step  11     before  3999        after  2024
step  12     before  3979        after  1994
step  13     before  3842        after  1929
step  14     before  3750        after  1810
step  15     before  3735        after  1810
step  16     before  3532        after  1660

normal-lookup

step  1      before  7875        after  5847
step  2      before  4808        after  4071
step  3      before  4073        after  3462
step  4      before  3677        after  3074
step  5      before  4308        after  2978
step  6      before  3911        after  3807
step  7      before  3635        after  3522
step  8      before  3313        after  3202
step  9      before  3280        after  3257
step  10     before  3166        after  3083
step  11     before  3066        after  3026
step  12     before  2985        after  2982
step  13     before  2925        after  2924
step  14     before  2834        after  2808
step  15     before  2805        after  2803
step  16     before  2647        after  2622

radix-tree with 1024*1024*128 slots:

tag-lookup

step  1      before  1288059720  after  951736580
step  2      before  961292300   after  884212140
step  7      before  768905140   after  547267580
step  15     before  771319480   after  456550640
step  63     before  504847640   after  242704304
step  64     before  392484800   after  177920786
step  65     before  491162160   after  246895264
step  128    before  208084064   after  97348392
step  256    before  112401035   after  51408126
step  512    before  75825834    after  29145070
step  12345  before  5603166     after  2847330

normal-lookup

step  1      before  1025677120  after  861375100
step  2      before  647220080   after  572258540
step  7      before  505518960   after  484041813
step  15     before  430483053   after  444815320	*
step  63     before  388113453   after  404250546	*
step  64     before  374154666   after  396027440	*
step  65     before  381423973   after  396704853	*
step  128    before  190078700   after  202619384	*
step  256    before  100886756   after  102829108	*
step  512    before  64074505    after  56158720
step  12345  before  4237289     after  4422299		*

* i686 on Sandy bridge

radix-tree with 1024 slots:

tagged lookup

step  1      before  7990        after  4019
step  2      before  5698        after  2897
step  3      before  5013        after  2475
step  4      before  4630        after  1721
step  5      before  4346        after  1759
step  6      before  4299        after  1556
step  7      before  4098        after  1513
step  8      before  4115        after  1222
step  9      before  3983        after  1390
step  10     before  4077        after  1207
step  11     before  3921        after  1231
step  12     before  3894        after  1116
step  13     before  3840        after  1147
step  14     before  3799        after  1090
step  15     before  3797        after  1059
step  16     before  3783        after  745

normal lookup

step  1      before  5103       after  3499
step  2      before  3299       after  2550
step  3      before  2489       after  2370
step  4      before  2034       after  2302		*
step  5      before  1846       after  2268		*
step  6      before  1752       after  2249		*
step  7      before  1679       after  2164		*
step  8      before  1627       after  2153		*
step  9      before  1542       after  2095		*
step  10     before  1479       after  2109		*
step  11     before  1469       after  2009		*
step  12     before  1445       after  2039		*
step  13     before  1411       after  2013		*
step  14     before  1374       after  2046		*
step  15     before  1340       after  1975		*
step  16     before  1331       after  2000		*

radix-tree with 1024*1024*128 slots:

tagged lookup

step  1      before  1225865377  after  667153553
step  2      before  842427423   after  471533007
step  7      before  609296153   after  276260116
step  15     before  544232060   after  226859105
step  63     before  519209199   after  141343043
step  64     before  588980279   after  141951339
step  65     before  521099710   after  138282060
step  128    before  298476778   after  83390628
step  256    before  149358342   after  43602609
step  512    before  76994713    after  22911077
step  12345  before  5328666     after  1472111

normal lookup

step  1      before  819284564  after  533635310
step  2      before  512421605  after  364956155
step  7      before  271443305  after  305721345	*
step  15     before  223591630  after  273960216	*
step  63     before  190320247  after  217770207	*
step  64     before  178538168  after  267411372	*
step  65     before  186400423  after  215347937	*
step  128    before  88106045   after  140540612	*
step  256    before  44812420   after  70660377		*
step  512    before  24435438   after  36328275		*
step  12345  before  2123924    after  2148062		*

bloat-o-meter delta for this patchset + patchset with related shmem cleanups

bloat-o-meter: x86_64

add/remove: 4/3 grow/shrink: 5/6 up/down: 928/-939 (-11)
function                                     old     new   delta
radix_tree_next_chunk                          -     499    +499
shmem_unuse                                  428     554    +126
shmem_radix_tree_replace                     131     227     +96
find_get_pages_tag                           354     419     +65
find_get_pages_contig                        345     407     +62
find_get_pages                               362     396     +34
__kstrtab_radix_tree_next_chunk                -      22     +22
__ksymtab_radix_tree_next_chunk                -      16     +16
__kcrctab_radix_tree_next_chunk                -       8      +8
radix_tree_gang_lookup_slot                  204     203      -1
static.shmem_xattr_set                       384     381      -3
radix_tree_gang_lookup_tag_slot              208     191     -17
radix_tree_gang_lookup                       231     187     -44
radix_tree_gang_lookup_tag                   247     199     -48
shmem_unlock_mapping                         278     190     -88
__lookup                                     217       -    -217
__lookup_tag                                 242       -    -242
radix_tree_locate_item                       279       -    -279

bloat-o-meter: i386

add/remove: 3/3 grow/shrink: 8/9 up/down: 1075/-1275 (-200)
function                                     old     new   delta
radix_tree_next_chunk                          -     757    +757
shmem_unuse                                  352     449     +97
find_get_pages_contig                        269     322     +53
shmem_radix_tree_replace                     113     154     +41
find_get_pages_tag                           277     318     +41
dcache_dir_lseek                             426     458     +32
__kstrtab_radix_tree_next_chunk                -      22     +22
vc_do_resize                                 968     977      +9
snd_pcm_lib_read1                            725     733      +8
__ksymtab_radix_tree_next_chunk                -       8      +8
netlbl_cipsov4_list                         1120    1127      +7
find_get_pages                               293     291      -2
new_slab                                     467     459      -8
bitfill_unaligned_rev                        425     417      -8
radix_tree_gang_lookup_tag_slot              177     146     -31
blk_dump_cmd                                 267     229     -38
radix_tree_gang_lookup_slot                  212     134     -78
shmem_unlock_mapping                         221     128     -93
radix_tree_gang_lookup_tag                   275     162    -113
radix_tree_gang_lookup                       255     126    -129
__lookup                                     227       -    -227
__lookup_tag                                 271       -    -271
radix_tree_locate_item                       277       -    -277

This patch:

Implement a clean, simple and effective radix-tree iteration routine.

Iterating divided into two phases:
* lookup next chunk in radix-tree leaf node
* iterating through slots in this chunk

Main iterator function radix_tree_next_chunk() returns pointer to first
slot, and stores in the struct radix_tree_iter index of next-to-last slot.
 For tagged-iterating it also constuct bitmask of tags for retunted chunk.
 All additional logic implemented as static-inline functions and macroses.

Also adds radix_tree_find_next_bit() static-inline variant of
find_next_bit() optimized for small constant size arrays, because
find_next_bit() too heavy for searching in an array with one/two long
elements.

[akpm@linux-foundation.org: rework comments a bit]
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Tested-by: Hugh Dickins <hughd@google.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:37 -07:00
Andrew Morton
4c619aa0ba fs/proc/namespaces.c: prevent crash when ns_entries[] is empty
If CONFIG_NET_NS, CONFIG_UTS_NS and CONFIG_IPC_NS are disabled,
ns_entries[] becomes empty and things like
ns_entries[ARRAY_SIZE(ns_entries) - 1] will explode.

Reported-by: Richard Weinberger <richard@nod.at>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Daniel Lezcano <daniel.lezcano@free.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:37 -07:00
Wanlong Gao
f4507164e7 nbd: rename the nbd_device variable from lo to nbd
rename the nbd_device variable from "lo" to "nbd", since "lo" is just a name
copied from loop.c.

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Cc: Paul Clements <paul.clements@steeleye.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:37 -07:00
Daniel Lezcano
cf3f89214e pidns: add reboot_pid_ns() to handle the reboot syscall
In the case of a child pid namespace, rebooting the system does not really
makes sense.  When the pid namespace is used in conjunction with the other
namespaces in order to create a linux container, the reboot syscall leads
to some problems.

A container can reboot the host.  That can be fixed by dropping the
sys_reboot capability but we are unable to correctly to poweroff/
halt/reboot a container and the container stays stuck at the shutdown time
with the container's init process waiting indefinitively.

After several attempts, no solution from userspace was found to reliabily
handle the shutdown from a container.

This patch propose to make the init process of the child pid namespace to
exit with a signal status set to : SIGINT if the child pid namespace
called "halt/poweroff" and SIGHUP if the child pid namespace called
"reboot".  When the reboot syscall is called and we are not in the initial
pid namespace, we kill the pid namespace for "HALT", "POWEROFF",
"RESTART", and "RESTART2".  Otherwise we return EINVAL.

Returning EINVAL is also an easy way to check if this feature is supported
by the kernel when invoking another 'reboot' option like CAD.

By this way the parent process of the child pid namespace knows if it
rebooted or not and can take the right decision.

Test case:
==========

#include <alloca.h>
#include <stdio.h>
#include <sched.h>
#include <unistd.h>
#include <signal.h>
#include <sys/reboot.h>
#include <sys/types.h>
#include <sys/wait.h>

#include <linux/reboot.h>

static int do_reboot(void *arg)
{
        int *cmd = arg;

        if (reboot(*cmd))
                printf("failed to reboot(%d): %m\n", *cmd);
}

int test_reboot(int cmd, int sig)
{
        long stack_size = 4096;
        void *stack = alloca(stack_size) + stack_size;
        int status;
        pid_t ret;

        ret = clone(do_reboot, stack, CLONE_NEWPID | SIGCHLD, &cmd);
        if (ret < 0) {
                printf("failed to clone: %m\n");
                return -1;
        }

        if (wait(&status) < 0) {
                printf("unexpected wait error: %m\n");
                return -1;
        }

        if (!WIFSIGNALED(status)) {
                printf("child process exited but was not signaled\n");
                return -1;
        }

        if (WTERMSIG(status) != sig) {
                printf("signal termination is not the one expected\n");
                return -1;
        }

        return 0;
}

int main(int argc, char *argv[])
{
        int status;

        status = test_reboot(LINUX_REBOOT_CMD_RESTART, SIGHUP);
        if (status < 0)
                return 1;
        printf("reboot(LINUX_REBOOT_CMD_RESTART) succeed\n");

        status = test_reboot(LINUX_REBOOT_CMD_RESTART2, SIGHUP);
        if (status < 0)
                return 1;
        printf("reboot(LINUX_REBOOT_CMD_RESTART2) succeed\n");

        status = test_reboot(LINUX_REBOOT_CMD_HALT, SIGINT);
        if (status < 0)
                return 1;
        printf("reboot(LINUX_REBOOT_CMD_HALT) succeed\n");

        status = test_reboot(LINUX_REBOOT_CMD_POWER_OFF, SIGINT);
        if (status < 0)
                return 1;
        printf("reboot(LINUX_REBOOT_CMD_POWERR_OFF) succeed\n");

        status = test_reboot(LINUX_REBOOT_CMD_CAD_ON, -1);
        if (status >= 0) {
                printf("reboot(LINUX_REBOOT_CMD_CAD_ON) should have failed\n");
                return 1;
        }
        printf("reboot(LINUX_REBOOT_CMD_CAD_ON) has failed as expected\n");

        return 0;
}

[akpm@linux-foundation.org: tweak and add comments]
[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Tested-by: Serge Hallyn <serge.hallyn@canonical.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:36 -07:00
Akinobu Mita
5a04cca6c3 sysctl: use bitmap library functions
Use bitmap_set() instead of using set_bit() for each bit.  This conversion
is valid because the bitmap is private in the function call and atomic
bitops were unnecessary.

This also includes minor change.
- Use bitmap_copy() for shorter typing

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:36 -07:00
Corey Minyard
423a5bb49e ipmi: use locks on watchdog timeout set on reboot
The IPMI watchdog timer clears or extends the timer on reboot/shutdown.
It was using the non-locking routine for setting the watchdog timer, but
this was causing race conditions.  Instead, use the locking version to
avoid the races.  It seems to work fine.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:36 -07:00
Corey Minyard
f60adf42ad ipmi: simplify locking
Now that the the IPMI driver is using a tasklet, we can simplify the
locking in the driver and get rid of the message lock.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:36 -07:00
Corey Minyard
895dcfd1ca ipmi: fix message handling during panics
The part of the IPMI driver that delivered panic information to the event
log and extended the watchdog timeout during a panic was not properly
handling the messages.  It used static messages to avoid allocation, but
wasn't properly waiting for these, or wasn't properly handling the
refcounts.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:36 -07:00
Corey Minyard
7adf579c8b ipmi: use a tasklet for handling received messages
The IPMI driver would release a lock, deliver a message, then relock.
This is obviously ugly, and this patch converts the message handler
interface to use a tasklet to schedule work.  This lets the receive
handler be called from an interrupt handler with interrupts enabled.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:36 -07:00
Matthew Garrett
828dc9da50 ipmi: increase KCS timeouts
We currently time out and retry KCS transactions after 1 second of waiting
for IBF or OBF.  This appears to be too short for some hardware.  The IPMI
spec says "All system software wait loops should include error timeouts.
For simplicity, such timeouts are not shown explicitly in the flow
diagrams.  A five-second timeout or greater is recommended".  Change the
timeout to five seconds to satisfy the slow hardware.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:36 -07:00
Srinivas_Gowda
b88e769368 ipmi: decrease the IPMI message transaction time in interrupt mode
Call the event handler immediately after starting the next message.

This change considerably decreases the IPMI transaction time (cuts off
~9ms for a single ipmitool transaction).

Signed-off-by: Srinivas_Gowda <srinivas_g_gowda@dell.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:36 -07:00
Dave Young
09c71bfd83 kdump x86: fix total mem size calculation for reservation
crashkernel reservation need know the total memory size.  Current
get_total_mem simply use max_pfn - min_low_pfn.  It is wrong because it
will including memory holes in the middle.

Especially for kvm guest with memory > 0xe0000000, there's below in qemu
code: qemu split memory as below:

    if (ram_size >= 0xe0000000 ) {
        above_4g_mem_size = ram_size - 0xe0000000;
        below_4g_mem_size = 0xe0000000;
    } else {
        below_4g_mem_size = ram_size;
    }

So for 4G mem guest, seabios will insert a 512M usable region beyond of
4G.  Thus in above case max_pfn - min_low_pfn will be more than original
memsize.

Fixing this issue by using memblock_phys_mem_size() to get the total
memsize.

Signed-off-by: Dave Young <dyoung@redhat.com>
Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com>
Reviewed-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:36 -07:00
Zhenzhong Duan
eaa3be6add kexec: add further check to crashkernel
When using crashkernel=2M-256M, the kernel doesn't give any warning.  This
is misleading sometimes.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:36 -07:00
Will Deacon
d034cfab4f kexec: crash: don't save swapper_pg_dir for !CONFIG_MMU configurations
nommu platforms don't have very interesting swapper_pg_dir pointers and
usually just #define them to NULL, meaning that we can't include them in
the vmcoreinfo on the kexec crash path.

This patch only saves the swapper_pg_dir if we have an MMU.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Simon Horman <horms@verge.net.au>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:36 -07:00
Srivatsa S. Bhat
7d7f98488b arch/ia64: remove references to cpu_*_map
This was marked as obsolete for quite a while now..  Now it is time to
remove it altogether.  And while doing this, get rid of first_cpu() as
well.  Also, remove the redundant setting of cpu_online_mask in
smp_prepare_cpus() because the generic code would have already set cpu 0
in cpu_online_mask.

Reported-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:36 -07:00
Srivatsa S. Bhat
38b93780a5 lib/cpumask.c: remove __any_online_cpu()
__any_online_cpu() is not optimal and also unnecessary.  So, replace its
use by faster cpumask_* operations.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Venkatesh Pallipadi <venki@google.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
Gilad Ben-Yossef
74046494ea mm: only IPI CPUs to drain local pages if they exist
Calculate a cpumask of CPUs with per-cpu pages in any zone and only send
an IPI requesting CPUs to drain these pages to the buddy allocator if they
actually have pages when asked to flush.

This patch saves 85%+ of IPIs asking to drain per-cpu pages in case of
severe memory pressure that leads to OOM since in these cases multiple,
possibly concurrent, allocation requests end up in the direct reclaim code
path so when the per-cpu pages end up reclaimed on first allocation
failure for most of the proceeding allocation attempts until the memory
pressure is off (possibly via the OOM killer) there are no per-cpu pages
on most CPUs (and there can easily be hundreds of them).

This also has the side effect of shortening the average latency of direct
reclaim by 1 or more order of magnitude since waiting for all the CPUs to
ACK the IPI takes a long time.

Tested by running "hackbench 400" on a 8 CPU x86 VM and observing the
difference between the number of direct reclaim attempts that end up in
drain_all_pages() and those were more then 1/2 of the online CPU had any
per-cpu page in them, using the vmstat counters introduced in the next
patch in the series and using proc/interrupts.

In the test sceanrio, this was seen to save around 3600 global
IPIs after trigerring an OOM on a concurrent workload:

$ cat /proc/vmstat | tail -n 2
pcp_global_drain 0
pcp_global_ipi_saved 0

$ cat /proc/interrupts | grep CAL
CAL:          1          2          1          2
          2          2          2          2   Function call interrupts

$ hackbench 400
[OOM messages snipped]

$ cat /proc/vmstat | tail -n 2
pcp_global_drain 3647
pcp_global_ipi_saved 3642

$ cat /proc/interrupts | grep CAL
CAL:          6         13          6          3
          3          3         1 2          7   Function call interrupts

Please note that if the global drain is removed from the direct reclaim
path as a patch from Mel Gorman currently suggests this should be replaced
with an on_each_cpu_cond invocation.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Christoph Lameter <cl@linux.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Acked-by: Michal Nazarewicz <mina86@mina86.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
Gilad Ben-Yossef
42be35d039 fs: only send IPI to invalidate LRU BH when needed
In several code paths, such as when unmounting a file system (but not
only) we send an IPI to ask each cpu to invalidate its local LRU BHs.

For multi-cores systems that have many cpus that may not have any LRU BH
because they are idle or because they have not performed any file system
accesses since last invalidation (e.g.  CPU crunching on high perfomance
computing nodes that write results to shared memory or only using
filesystems that do not use the bh layer.) This can lead to loss of
performance each time someone switches the KVM (the virtual keyboard and
screen type, not the hypervisor) if it has a USB storage stuck in.

This patch attempts to only send an IPI to cpus that have LRU BH.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
Gilad Ben-Yossef
a8364d5555 slub: only IPI CPUs that have per cpu obj to flush
flush_all() is called for each kmem_cache_destroy().  So every cache being
destroyed dynamically ends up sending an IPI to each CPU in the system,
regardless if the cache has ever been used there.

For example, if you close the Infinband ipath driver char device file, the
close file ops calls kmem_cache_destroy().  So running some infiniband
config tool on one a single CPU dedicated to system tasks might interrupt
the rest of the 127 CPUs dedicated to some CPU intensive or latency
sensitive task.

I suspect there is a good chance that every line in the output of "git
grep kmem_cache_destroy linux/ | grep '\->'" has a similar scenario.

This patch attempts to rectify this issue by sending an IPI to flush the
per cpu objects back to the free lists only to CPUs that seem to have such
objects.

The check which CPU to IPI is racy but we don't care since asking a CPU
without per cpu objects to flush does no damage and as far as I can tell
the flush_all by itself is racy against allocs on remote CPUs anyway, so
if you required the flush_all to be determinstic, you had to arrange for
locking regardless.

Without this patch the following artificial test case:

$ cd /sys/kernel/slab
$ for DIR in *; do cat $DIR/alloc_calls > /dev/null; done

produces 166 IPIs on an cpuset isolated CPU. With it it produces none.

The code path of memory allocation failure for CPUMASK_OFFSTACK=y
config was tested using fault injection framework.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Sasha Levin <levinsasha928@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Avi Kivity <avi@redhat.com>
Cc: Michal Nazarewicz <mina86@mina86.org>
Cc: Kosaki Motohiro <kosaki.motohiro@gmail.com>
Cc: Milton Miller <miltonm@bga.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
Gilad Ben-Yossef
b3a7e98e02 smp: add func to IPI cpus based on parameter func
Add the on_each_cpu_cond() function that wraps on_each_cpu_mask() and
calculates the cpumask of cpus to IPI by calling a function supplied as a
parameter in order to determine whether to IPI each specific cpu.

The function works around allocation failure of cpumask variable in
CONFIG_CPUMASK_OFFSTACK=y by itereating over cpus sending an IPI a time
via smp_call_function_single().

The function is useful since it allows to seperate the specific code that
decided in each case whether to IPI a specific cpu for a specific request
from the common boilerplate code of handling creating the mask, handling
failures etc.

[akpm@linux-foundation.org: s/gfpflags/gfp_flags/]
[akpm@linux-foundation.org: avoid double-evaluation of `info' (per Michal), parenthesise evaluation of `cond_func']
[akpm@linux-foundation.org: s/CPU/CPUs, use all 80 cols in comment]
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Sasha Levin <levinsasha928@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Avi Kivity <avi@redhat.com>
Acked-by: Michal Nazarewicz <mina86@mina86.org>
Cc: Kosaki Motohiro <kosaki.motohiro@gmail.com>
Cc: Milton Miller <miltonm@bga.com>
Reviewed-by: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
Gilad Ben-Yossef
3fc498f165 smp: introduce a generic on_each_cpu_mask() function
We have lots of infrastructure in place to partition multi-core systems
such that we have a group of CPUs that are dedicated to specific task:
cgroups, scheduler and interrupt affinity, and cpuisol= boot parameter.
Still, kernel code will at times interrupt all CPUs in the system via IPIs
for various needs.  These IPIs are useful and cannot be avoided
altogether, but in certain cases it is possible to interrupt only specific
CPUs that have useful work to do and not the entire system.

This patch set, inspired by discussions with Peter Zijlstra and Frederic
Weisbecker when testing the nohz task patch set, is a first stab at trying
to explore doing this by locating the places where such global IPI calls
are being made and turning the global IPI into an IPI for a specific group
of CPUs.  The purpose of the patch set is to get feedback if this is the
right way to go for dealing with this issue and indeed, if the issue is
even worth dealing with at all.  Based on the feedback from this patch set
I plan to offer further patches that address similar issue in other code
paths.

This patch creates an on_each_cpu_mask() and on_each_cpu_cond()
infrastructure API (the former derived from existing arch specific
versions in Tile and Arm) and uses them to turn several global IPI
invocation to per CPU group invocations.

Core kernel:

on_each_cpu_mask() calls a function on processors specified by cpumask,
which may or may not include the local processor.

You must not call this function with disabled interrupts or from a
hardware interrupt handler or from a bottom half handler.

arch/arm:

Note that the generic version is a little different then the Arm one:

1. It has the mask as first parameter
2. It calls the function on the calling CPU with interrupts disabled,
   but this should be OK since the function is called on the other CPUs
   with interrupts disabled anyway.

arch/tile:

The API is the same as the tile private one, but the generic version
also calls the function on the with interrupts disabled in UP case

This is OK since the function is called on the other CPUs
with interrupts disabled.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Sasha Levin <levinsasha928@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Avi Kivity <avi@redhat.com>
Acked-by: Michal Nazarewicz <mina86@mina86.org>
Cc: Kosaki Motohiro <kosaki.motohiro@gmail.com>
Cc: Milton Miller <miltonm@bga.com>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
Hugh Dickins
d15cab9754 swapon: check validity of swap_flags
Most system calls taking flags first check that the flags passed in are
valid, and that helps userspace to detect when new flags are supported.

But swapon never did so: start checking now, to help if we ever want to
support more swap_flags in future.

It's difficult to get stray bits set in an int, and swapon is not widely
used, so this is most unlikely to break any userspace; but we can just
revert if it turns out to do so.

Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
David Rientjes
29fd66d289 mm, coredump: fail allocations when coredumping instead of oom killing
The size of coredump files is limited by RLIMIT_CORE, however, allocating
large amounts of memory results in three negative consequences:

 - the coredumping process may be chosen for oom kill and quickly deplete
   all memory reserves in oom conditions preventing further progress from
   being made or tasks from exiting,

 - the coredumping process may cause other processes to be oom killed
   without fault of their own as the result of a SIGSEGV, for example, in
   the coredumping process, or

 - the coredumping process may result in a livelock while writing to the
   dump file if it needs memory to allocate while other threads are in
   the exit path waiting on the coredumper to complete.

This is fixed by implying __GFP_NORETRY in the page allocator for
coredumping processes when reclaim has failed so the allocations fail and
the process continues to exit.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
Andrea Arcangeli
45f83cefe3 mm: thp: fix up pmd_trans_unstable() locations
pmd_trans_unstable() should be called before pmd_offset_map() in the
locations where the mmap_sem is held for reading.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Larry Woodman <lwoodman@redhat.com>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mark Salter <msalter@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
Hugh Dickins
623e3db9f9 mm for fs: add truncate_pagecache_range()
Holepunching filesystems ext4 and xfs are using truncate_inode_pages_range
but forgetting to unmap pages first (ocfs2 remembers).  This is not really
a bug, since races already require truncate_inode_page() to handle that
case once the page is locked; but it can be very inefficient if the file
being punched happens to be mapped into many vmas.

Provide a drop-in replacement truncate_pagecache_range() which does the
unmapping pass first, handling the awkward mismatch between arguments to
truncate_inode_pages_range() and arguments to unmap_mapping_range().

Note that holepunching does not unmap privately COWed pages in the range:
POSIX requires that we do so when truncating, but it's hard to justify,
difficult to implement without an i_size cutoff, and no filesystem is
attempting to implement it.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Ben Myers <bpm@sgi.com>
Cc: Alex Elder <elder@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
KAMEZAWA Hiroyuki
3748b2f15b procfs: fix /proc/statm
bda7bad62b ("procfs: speed up /proc/pid/stat, statm") broke /proc/statm
- 'text' is printed twice by mistake.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reported-by: Ulrich Drepper <drepper@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 17:14:35 -07:00
Linus Torvalds
529b73fc0a trivial writeback fixes
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Merge tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux

Pull trivial writeback fixes from Wu Fengguang:
 "They've been tested in linux-next for 20 days actually."

* tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:
  writeback: Remove outdated comment
  fs: Remove bogus wait in write_inode_now()
2012-03-28 10:07:27 -07:00
Linus Torvalds
69e1aaddd6 Ext4 commits for 3.3 merge window; mostly cleanups and bug fixes
The changes to export dirty_writeback_interval are from Artem's s_dirt
 cleanup patch series.  The same is true of the change to remove the
 s_dirt helper functions which never got used by anyone in-tree.  I've
 run these changes by Al Viro, and am carrying them so that Artem can
 more easily fix up the rest of the file systems during the next merge
 window.  (Originally we had hopped to remove the use of s_dirt from
 ext4 during this merge window, but his patches had some bugs, so I
 ultimately ended dropping them from the ext4 tree.)
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 updates for 3.4 from Ted Ts'o:
 "Ext4 commits for 3.3 merge window; mostly cleanups and bug fixes

  The changes to export dirty_writeback_interval are from Artem's s_dirt
  cleanup patch series.  The same is true of the change to remove the
  s_dirt helper functions which never got used by anyone in-tree.  I've
  run these changes by Al Viro, and am carrying them so that Artem can
  more easily fix up the rest of the file systems during the next merge
  window.  (Originally we had hopped to remove the use of s_dirt from
  ext4 during this merge window, but his patches had some bugs, so I
  ultimately ended dropping them from the ext4 tree.)"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (66 commits)
  vfs: remove unused superblock helpers
  mm: export dirty_writeback_interval
  ext4: remove useless s_dirt assignment
  ext4: write superblock only once on unmount
  ext4: do not mark superblock as dirty unnecessarily
  ext4: correct ext4_punch_hole return codes
  ext4: remove restrictive checks for EOFBLOCKS_FL
  ext4: always set then trimmed blocks count into len
  ext4: fix trimmed block count accunting
  ext4: fix start and len arguments handling in ext4_trim_fs()
  ext4: update s_free_{inodes,blocks}_count during online resize
  ext4: change some printk() calls to use ext4_msg() instead
  ext4: avoid output message interleaving in ext4_error_<foo>()
  ext4: remove trailing newlines from ext4_msg() and ext4_error() messages
  ext4: add no_printk argument validation, fix fallout
  ext4: remove redundant "EXT4-fs: " from uses of ext4_msg
  ext4: give more helpful error message in ext4_ext_rm_leaf()
  ext4: remove unused code from ext4_ext_map_blocks()
  ext4: rewrite punch hole to use ext4_ext_remove_space()
  jbd2: cleanup journal tail after transaction commit
  ...
2012-03-28 10:02:55 -07:00
Linus Torvalds
56b59b429b Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph updates for 3.4-rc1 from Sage Weil:
 "Alex has been busy.  There are a range of rbd and libceph cleanups,
  especially surrounding device setup and teardown, and a few critical
  fixes in that code.  There are more cleanups in the messenger code,
  virtual xattrs, a fix for CRC calculation/checks, and lots of other
  miscellaneous stuff.

  There's a patch from Amon Ott to make inos behave a bit better on
  32-bit boxes, some decode check fixes from Xi Wang, and network
  throttling fix from Jim Schutt, and a couple RBD fixes from Josh
  Durgin.

  No new functionality, just a lot of cleanup and bug fixing."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (65 commits)
  rbd: move snap_rwsem to the device, rename to header_rwsem
  ceph: fix three bugs, two in ceph_vxattrcb_file_layout()
  libceph: isolate kmap() call in write_partial_msg_pages()
  libceph: rename "page_shift" variable to something sensible
  libceph: get rid of zero_page_address
  libceph: only call kernel_sendpage() via helper
  libceph: use kernel_sendpage() for sending zeroes
  libceph: fix inverted crc option logic
  libceph: some simple changes
  libceph: small refactor in write_partial_kvec()
  libceph: do crc calculations outside loop
  libceph: separate CRC calculation from byte swapping
  libceph: use "do" in CRC-related Boolean variables
  ceph: ensure Boolean options support both senses
  libceph: a few small changes
  libceph: make ceph_tcp_connect() return int
  libceph: encapsulate some messenger cleanup code
  libceph: make ceph_msgr_wq private
  libceph: encapsulate connection kvec operations
  libceph: move prepare_write_banner()
  ...
2012-03-28 10:01:29 -07:00
Linus Torvalds
9a7259d5c8 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext3, UDF, and quota fixes from Jan Kara:
 "A couple of ext3 & UDF fixes and also one improvement in quota
  locking."

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  ext3: fix start and len arguments handling in ext3_trim_fs()
  udf: Fix deadlock in udf_release_file()
  udf: Fix file entry logicalBlocksRecorded
  udf: Fix handling of i_blocks
  quota: Make quota code not call tty layer with dqptr_sem held
  udf: Init/maintain file entry checkpoint field
  ext3: Update ctime in ext3_splice_branch() only when needed
  ext3: Don't call dquot_free_block() if we don't update anything
  udf: Remove unnecessary OOM messages
2012-03-28 10:00:14 -07:00
Linus Torvalds
e9c0f1529c 9p changes for the 3.4 merge window
The following changes since commit 3c761ea05a:
 
   Fix autofs compile without CONFIG_COMPAT (2012-02-26 09:44:55 -0800)
 
 are available in the git repository at:
   git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs.git for-linus
 
 Jim Garlick (3):
       net/9p: don't allow Tflush to be interrupted
       net/9p: handle flushed Tclunk/Tremove
       9p: statfs should not override server f_type
 
  fs/9p/vfs_super.c |    2 +-
  net/9p/client.c   |   26 +++++++++++++++++++++++---
  2 files changed, 24 insertions(+), 4 deletions(-)
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Merge tag 'for-linus-3.4-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs

Pull 9p changes for the 3.4 merge window from Eric Van Hensbergen.

* tag 'for-linus-3.4-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  9p: statfs should not override server f_type
  net/9p: handle flushed Tclunk/Tremove
  net/9p: don't allow Tflush to be interrupted
2012-03-28 09:58:38 -07:00
Michel Lespinasse
b18dafc86b vfs: fix d_ancestor() case in d_materialize_unique
In d_materialise_unique() there are 3 subcases to the 'aliased dentry'
case; in two subcases the inode i_lock is properly released but this
does not occur in the -ELOOP subcase.

This seems to have been introduced by commit 1836750115 ("fix loop
checks in d_materialise_unique()").

Signed-off-by: Michel Lespinasse <walken@google.com>
Cc: stable@vger.kernel.org # v3.0+
[ Added a comment, and moved the unlock to where we generate the -ELOOP,
  which seems to be more natural.

  You probably can't actually trigger this without a buggy network file
  server - d_materialize_unique() is for finding aliases on non-local
  filesystems, and the d_ancestor() case is for a hardlinked directory
  loop.

  But we should be robust in the case of such buggy servers anyway. ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28 09:54:34 -07:00
Linus Torvalds
6658a6991c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 patches part 2 from Martin Schwidefsky:
 "Some minor improvements and one additional feature for the 3.4 merge
  window: Hendrik added perf support for the s390 CPU counters."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  [S390] register cpu devices for SMP=n
  [S390] perf: add support for s390x CPU counters
  [S390] oprofile: Allow multiple users of the measurement alert interrupt
  [S390] qdio: log all adapter characteristics
  [S390] Remove unncessary export of arch_pick_mmap_layout
2012-03-27 18:36:38 -07:00
Linus Torvalds
fa453a625d Merge branch 'for-linus-3.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml
Pull UML changes from Richard Weinberger:
 "Mostly bug fixes and cleanups"

* 'for-linus-3.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: (35 commits)
  um: Update defconfig
  um: Switch to large mcmodel on x86_64
  MTD: Relax dependencies
  um: Wire CONFIG_GENERIC_IO up
  um: Serve io_remap_pfn_range()
  Introduce CONFIG_GENERIC_IO
  um: allow SUBARCH=x86
  um: most of the SUBARCH uses can be killed
  um: deadlock in line_write_interrupt()
  um: don't bother trying to rebuild CHECKFLAGS for USER_OBJS
  um: use the right ifdef around exports in user_syms.c
  um: a bunch of headers can be killed by using generic-y
  um: ptrace-generic.h doesn't need user.h
  um: kill HOST_TASK_PID
  um: remove pointless include of asm/fixmap.h from asm/pgtable.h
  um: asm-offsets.h might as well come from underlying arch...
  um: merge processor_{32,64}.h a bit...
  um: switch close_chan() to struct line
  um: race fix: initialize delayed_work *before* registering IRQ
  um: line->have_irq is never checked...
  ...
2012-03-27 18:29:53 -07:00
Linus Torvalds
30eebb54b1 Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze
Pull arch/microblaze fixes from Michal Simek

* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Handle TLB skip size dynamically
  microblaze: Introduce TLB skip size
  microblaze: Improve TLB calculation for small systems
  microblaze: Extend space for compiled-in FDT to 32kB
  microblaze: Clear all MSR flags on the first kernel instruction
  microblaze: Use node name instead of compatible string
  microblaze: Fix mapin_ram function
  microblaze: Highmem support
  microblaze: Use active regions
  microblaze: Show more detailed information about memory
  microblaze: Introduce fixmap
  microblaze: mm: Fix lowmem max memory size limits
  microblaze: mm: Use ZONE_DMA instead of ZONE_NORMAL
  microblaze: trivial: Fix typo fault in timer.c
  microblaze: Use vsprintf extention %pf with builtin_return_address
  microblaze: Add PVR version string for MB 8.20.b and 8.30.a
  microblaze: Fix makefile to work with latest toolchain
  microblaze: Fix typo in early_printk.c
2012-03-27 18:20:56 -07:00
Linus Torvalds
9e4db1c3ee Merge branch 'platforms' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM platform updates from Russell King:
 "This covers platform stuff for platforms I have a direct interest in
  (iow, I have the hardware).  Essentially:
   - as we no longer support any other Acorn platforms other than RiscPC
     anymore, we can collect all that code into mach-rpc.
   - convert Acorn expansion card stuff to use IRQ allocation functions,
     and get rid of NO_IRQ from there.
   - cleanups to the ebsa110 platform to move some private stuff out of
     its header files.
   - large amount of SA11x0 updates:
   - conversion of private DMA implementation to DMA engine support
     (this actually gives us greater flexibility in drivers over the old
     API.)
   - re-worked ucb1x00 updates - convert to genirq, remove sa11x0
     dependencies, fix various minor issues
   - move platform specific sa11x0 framebuffer data into platform files
     in arch/arm instead of keeping this in the driver itself
   - update sa11x0 IrDA driver for DMA engine, and allow it to use DMA
     for SIR transmissions as well as FIR
   - rework sa1111 support for genirq, and irq allocation
   - fix sa1111 IRQ support so it works again
   - use sparse IRQ support

  After this, I have one more pull request remaining from my current
  set, which I think is going to be the most problematical as it
  generates 8 conflicts."

Fixed up the trivial conflict in arch/arm/mach-rpc/Makefile as per
Russell.

* 'platforms' of git://git.linaro.org/people/rmk/linux-arm: (125 commits)
  ARM: 7343/1: sa11x0: convert to sparse IRQ
  ARM: 7342/2: sa1100: prepare for sparse irq conversion
  ARM: 7341/1: input: prepare jornada720 keyboard and ts for sa11x0 sparse irq
  ARM: 7340/1: rtc: sa1100: include mach/irqs.h instead of asm/irq.h
  ARM: sa11x0: remove unused DMA controller definitions
  ARM: sa11x0: remove old SoC private DMA driver
  USB: sa1111: add hcd .reset method
  USB: sa1111: add OHCI shutdown methods
  USB: sa1111: reorganize ohci-sa1111.c
  USB: sa1111: get rid of nasty printk(KERN_DEBUG "%s: ...", __FILE__)
  USB: sa1111: sparse and checkpatch cleanups
  ARM: sa11x0: don't static map sa1111
  ARM: sa1111: use dev_err() rather than printk()
  ARM: sa1111: cleanup sub-device registration and unregistration
  ARM: sa1111: only setup DMA for DMA capable devices
  ARM: sa1111: register sa1111 devices with dmabounce in bus notifier
  ARM: sa1111: move USB interface register definitions to ohci-sa1111.c
  ARM: sa1111: move PCMCIA interface register definitions to sa1111_generic.c
  ARM: sa1111: move PS/2 interface register definitions to sa1111p2.c
  ARM: sa1111: delete unused physical GPIO register definitions
  ...
2012-03-27 18:17:02 -07:00
Linus Torvalds
de8856d2c1 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:
 1) Name string overrun fix in gianfar driver from Joe Perches.

 2) VHOST bug fixes from Michael S. Tsirkin and Nadav Har'El

 3) Fix dependencies on xt_LOG netfilter module, from Pablo Neira Ayuso.

 4) Fix RCU locking in xt_CT, also from Pablo Neira Ayuso.

 5) Add a parameter to skb_add_rx_frag() so we can fix the truesize
    adjustments in the drivers that use it.  The individual drivers
    aren't fixed by this commit, but will be dealt with using follow-on
    commits.  From Eric Dumazet.

 6) Add some device IDs to qmi_wwan driver, from Andrew Bird.

 7) Fix a potential rcu_read_lock() imbalancein rt6_fill_node().  From
    Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  net: fix a potential rcu_read_lock() imbalance in rt6_fill_node()
  net: add a truesize parameter to skb_add_rx_frag()
  gianfar: Fix possible overrun and simplify interrupt name field creation
  USB: qmi_wwan: Add ZTE (Vodafone) K3570-Z and K3571-Z net interfaces
  USB: option: Ignore ZTE (Vodafone) K3570/71 net interfaces
  USB: qmi_wwan: Add ZTE (Vodafone) K3565-Z and K4505-Z net interfaces
  qlcnic: Bug fix for LRO
  netfilter: nf_conntrack: permanently attach timeout policy to conntrack
  netfilter: xt_CT: fix assignation of the generic protocol tracker
  netfilter: xt_CT: missing rcu_read_lock section in timeout assignment
  netfilter: cttimeout: fix dependency with l4protocol conntrack module
  netfilter: xt_LOG: use CONFIG_IP6_NF_IPTABLES instead of CONFIG_IPV6
  vhost: fix release path lockdep checks
  vhost: don't forget to schedule()
  tools/virtio: stub out strong barriers
  tools/virtio: add linux/hrtimer.h stub
  tools/virtio: add linux/module.h stub
2012-03-27 16:52:32 -07:00
Linus Torvalds
66f03c614c ARM: device tree work
Most of these patches convert code from using static platform data to
 describing the hardware in the device tree. This is only the first
 half of the changes for v3.4 because a lot of patches for this topic
 came in the last week before the merge window.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull "ARM: device tree work" from Arnd Bergmann:
 "Most of these patches convert code from using static platform data to
  describing the hardware in the device tree.  This is only the first
  half of the changes for v3.4 because a lot of patches for this topic
  came in the last week before the merge window.

  Signed-off-by: Arnd Bergmann <arnd@arndb.de>"

Fix up trivial conflicts in arch/arm/mach-vexpress/{Kconfig,core.h}

* tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (86 commits)
  Document: devicetree: add OF documents for arch-mmp
  ARM: dts: append DTS file of pxa168
  ARM: mmp: append OF support on pxa168
  ARM: mmp: enable rtc clk in pxa168
  i2c: pxa: add OF support
  serial: pxa: add OF support
  arm/dts: mt_ventoux: very basic support for TeeJet Mt.Ventoux board
  ARM: OMAP2+: Remove extra ifdefs for board-generic
  ARM: OMAP2+: Fix build error when only ARCH_OMAP2/3 or 4 is selected
  ASoC: DT: Add digital microphone binding to PAZ00 board.
  ARM: dt: Add ARM PMU to tegra*.dtsi
  ARM: at91: at91sam9x5cm/dt: add leds support
  ARM: at91: usb_a9g20/dt: add gpio-keys support
  ARM: at91: at91sam9m10g45ek/dt: add gpio-keys support
  ARM: at91: at91sam9m10g45ek/dt: add leds support
  ARM: at91: usb_a9g20/dt: add leds support
  ARM: at91/pio: add new PIO3 features
  ARM: at91: add sam9_smc.o to at91sam9x5 build
  ARM: at91/tc/clocksource: Add 32 bit variant to Timer Counter
  ARM: at91/tc: add device tree support to atmel_tclib
  ...
2012-03-27 16:47:35 -07:00
Linus Torvalds
34800598b2 ARM: driver specific updates
These are all specific to some driver. They are typically the platform
 side of a change in the drivers directory, such as adding a new driver
 or extending the interface to the platform. In cases where there is no
 maintainer for the driver, or the maintainer prefers to have the
 platform changes in the same branch as the driver changes, the patches
 to the drivers are included as well.
 
 A much smaller set of driver updates that depend on other branches
 getting merged first will be sent later.
 
 The new export of tegra_chip_uid conflicts with other changes in fuse.c.
 In rtc-sa1100.c, the global removal of IRQF_DISABLED conflicts with
 the cleanup of the interrupt handling of that driver.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull "ARM: driver specific updates" from Arnd Bergmann:
 "These are all specific to some driver.  They are typically the
  platform side of a change in the drivers directory, such as adding a
  new driver or extending the interface to the platform.  In cases where
  there is no maintainer for the driver, or the maintainer prefers to
  have the platform changes in the same branch as the driver changes,
  the patches to the drivers are included as well.

  A much smaller set of driver updates that depend on other branches
  getting merged first will be sent later.

  The new export of tegra_chip_uid conflicts with other changes in
  fuse.c.  In rtc-sa1100.c, the global removal of IRQF_DISABLED
  conflicts with the cleanup of the interrupt handling of that driver.

  Signed-off-by: Arnd Bergmann <arnd@arndb.de>"

Fixed up aforementioned trivial conflicts.

* tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (94 commits)
  ARM: SAMSUNG: change the name from s3c-sdhci to exynos4-sdhci
  mmc: sdhci-s3c: add platform data for the second capability
  ARM: SAMSUNG: support the second capability for samsung-soc
  ARM: EXYNOS: add support DMA for EXYNOS4X12 SoC
  ARM: EXYNOS: Add apb_pclk clkdev entry for mdma1
  ARM: EXYNOS: Enable MDMA driver
  regulator: Remove bq24022 regulator driver
  rtc: sa1100: add OF support
  pxa: magician/hx4700: Convert to gpio-regulator from bq24022
  ARM: OMAP3+: SmartReflex: fix error handling
  ARM: OMAP3+: SmartReflex: fix the use of debugfs_create_* API
  ARM: OMAP3+: SmartReflex: micro-optimization for sanity check
  ARM: OMAP3+: SmartReflex: misc cleanups
  ARM: OMAP3+: SmartReflex: move late_initcall() closer to its argument
  ARM: OMAP3+: SmartReflex: add missing platform_set_drvdata()
  ARM: OMAP3+: hwmod: add SmartReflex IRQs
  ARM: OMAP3+: SmartReflex: clear ERRCONFIG_VPBOUNDINTST only on a need
  ARM: OMAP3+: SmartReflex: Fix status masking in ERRCONFIG register
  ARM: OMAP3+: SmartReflex: Add a shutdown hook
  ARM: OMAP3+: SmartReflex Class3: disable errorgen before disable VP
  ...

Conflicts:
	arch/arm/mach-tegra/Makefile
	arch/arm/mach-tegra/fuse.c
	drivers/rtc/rtc-sa1100.c
2012-03-27 16:41:24 -07:00
Linus Torvalds
46b407ca4a remoteproc/rpmsg: new subsystem
This new subsystem provides a common way to talk to secondary processors
 on an SoC, e.g. a DSP, GPU or service processor, using virtio as the
 transport. In the long run, it should replace a few dozen vendor
 specific ways to do the same thing, which all never made it into the
 upstream kernel. There is a broad agreement that rpmsg is the way to
 go here and several vendors have started working on replacing their
 own subsystems.
 
 Two branches each add one virtio protocol number. Fortunately the
 numbers were agreed upon in advance, so there are only context changes.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'rpmsg' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull "remoteproc/rpmsg: new subsystem" from Arnd Bergmann:
 "This new subsystem provides a common way to talk to secondary
  processors on an SoC, e.g.  a DSP, GPU or service processor, using
  virtio as the transport.  In the long run, it should replace a few
  dozen vendor specific ways to do the same thing, which all never made
  it into the upstream kernel.  There is a broad agreement that rpmsg is
  the way to go here and several vendors have started working on
  replacing their own subsystems.

  Two branches each add one virtio protocol number.  Fortunately the
  numbers were agreed upon in advance, so there are only context
  changes.

  Signed-off-by: Arnd Bergmann <arnd@arndb.de>"

Fixed up trivial protocol number conflict due to the mentioned additions
next to each other.

* tag 'rpmsg' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (32 commits)
  remoteproc: cleanup resource table parsing paths
  remoteproc: remove the hardcoded vring alignment
  remoteproc/omap: remove the mbox_callback limitation
  remoteproc: remove the single rpmsg vdev limitation
  remoteproc: safer boot/shutdown order
  remoteproc: remoteproc_rpmsg -> remoteproc_virtio
  remoteproc: resource table overhaul
  rpmsg: fix build warning when dma_addr_t is 64-bit
  rpmsg: fix published buffer length in rpmsg_recv_done
  rpmsg: validate incoming message length before propagating
  rpmsg: fix name service endpoint leak
  remoteproc/omap: two Kconfig fixes
  remoteproc: make sure we're parsing a 32bit firmware
  remoteproc: s/big switch/lookup table/
  remoteproc: bail out if firmware has different endianess
  remoteproc: don't use virtio's weak barriers
  rpmsg: rename virtqueue_add_buf_gfp to virtqueue_add_buf
  rpmsg: depend on EXPERIMENTAL
  remoteproc: depend on EXPERIMENTAL
  rpmsg: add Kconfig menu
  ...

Conflicts:
	include/linux/virtio_ids.h
2012-03-27 16:30:09 -07:00
Linus Torvalds
1bfecd9358 ARM: board specific updates
These changes are all specific to one board only. We're trying to keep
 the number of board files low, but generally board level updates are
 ok on platforms that are working on moving towards DT based probing,
 which will eventually lead to removing them.
 
 The board-ams-delta.c board file gets a conflict between the removal of
 ams_delta_config and the addition of a lot of other data. The Kconfig
 file has two changes in the same line, and in exynos, the power domain
 cleanup conflicts with the addition of the image sensor device.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 [olof: Amended a fix for a mismerge to board-omap4panda.c]
 Signed-off-by: Olof Johansson <olof@lixom.net>
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Merge tag 'boards' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull "ARM: board specific updates" from Arnd Bergmann/Olof Johansson:
 "These changes are all specific to one board only.  We're trying to
  keep the number of board files low, but generally board level updates
  are ok on platforms that are working on moving towards DT based
  probing, which will eventually lead to removing them.

  The board-ams-delta.c board file gets a conflict between the removal
  of ams_delta_config and the addition of a lot of other data.  The
  Kconfig file has two changes in the same line, and in exynos, the
  power domain cleanup conflicts with the addition of the image sensor
  device.

  Signed-off-by: Arnd Bergmann <arnd@arndb.de>
  [olof: Amended a fix for a mismerge to board-omap4panda.c]
  Signed-off-by: Olof Johansson <olof@lixom.net>"

Fixed up some fairly trivial conflicts manually.

* tag 'boards' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (82 commits)
  i.MX35-PDK: Add Camera support
  ARM : mx35: 3ds-board: add framebuffer device
  pxa/hx4700: Remove pcmcia platform_device structure
  ARM: pxa/hx4700: Reduce sleep mode battery discharge by 35%
  ARM: pxa/hx4700: Remove unwanted request for GPIO105
  ARM: EXYNOS: support Exynos4210-bus Devfreq driver on Nuri board
  ARM: EXYNOS: Register JPEG on nuri
  ARM: EXYNOS: Register JPEG on universal_c210
  ARM: S5PV210: Enable JPEG on SMDKV210
  ARM: S5PV210: Add JPEG board definition
  ARM: EXYNOS: Enable JPEG on Origen
  ARM: EXYNOS: Enable JPEG on SMDKV310
  ARM: EXYNOS: Add __init attribute to universal_camera_init()
  ARM: EXYNOS: Add __init attribute to nuri_camera_init()
  ARM: S5PV210: Enable FIMC on SMDKC110
  ARM: S5PV210: Enable FIMC on SMDKV210
  ARM: S5PV210: Enable MFC on SMDKC110
  ARM: S5PV210: Enable MFC on SMDKV210
  ARM: EXYNOS: Enable G2D on SMDKV310
  ARM: tegra: update defconfig
  ...
2012-03-27 16:27:28 -07:00
Linus Torvalds
281b05392f ARM: SoC specific updates
These changes are all specific to an soc family or the code for
 one soc. Lots of work for Tegra3 this time, but also a lot of other
 platforms. There will be another (smaller) set of soc patches later in
 the merge window for stuff that has dependencies on external trees or
 that was sent just before the merge window opened.
 
 The asoc tree added a few devices to the i.mx platform, which conflict
 with other devices added in the same place here.
 
 The tegra Makefile conflicts between a number of branches, mostly because
 of changes regarding localtimer.c, which was removed in the end.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull "ARM: SoC specific updates" from Arnd Bergmann:
 "These changes are all specific to an soc family or the code for one
  soc.  Lots of work for Tegra3 this time, but also a lot of other
  platforms.  There will be another (smaller) set of soc patches later
  in the merge window for stuff that has dependencies on external trees
  or that was sent just before the merge window opened.

  The asoc tree added a few devices to the i.mx platform, which conflict
  with other devices added in the same place here.

  The tegra Makefile conflicts between a number of branches, mostly
  because of changes regarding localtimer.c, which was removed in the
  end.

  Signed-off-by: Arnd Bergmann <arnd@arndb.de>"

Fix up some trivial conflicts, including the mentioned Tegra Makefile.

* tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (51 commits)
  ARM: EXYNOS: fix cycle count for periodic mode of clock event timers
  ARM: EXYNOS: add support JPEG
  ARM: EXYNOS: Add DMC1, allow PPMU access for DMC
  ARM: SAMSUNG: Correct MIPI-CSIS io memory resource definition
  ARM: SAMSUNG: fix __init attribute on regarding s3c_set_platdata()
  ARM: SAMSUNG: Add __init attribute to samsung_bl_set()
  ARM: S5PV210: Add usb otg phy control
  ARM: S3C64XX: Add usb otg phy control
  ARM: EXYNOS: Enable l2 configuration through device tree
  ARM: EXYNOS: remove useless code to save/restore L2
  ARM: EXYNOS: save L2 settings during bootup
  ARM: S5P: add L2 early resume code
  ARM: EXYNOS: Add support AFTR mode on EXYNOS4210
  ARM: mx35: Setup the AIPS registers
  ARM: mx5: Use common function for configuring AIPS
  ARM: mx3: Setup AIPS registers
  ARM: mx3: Let mx31 and mx35 enter in LPM mode in WFI
  ARM: defconfig: imx_v6_v7: build in REGULATOR_FIXED_VOLTAGE
  ARM: imx: update imx_v6_v7_defconfig
  ARM: tegra: Demote EMC clock inconsistency BUG to WARN
  ...
2012-03-27 16:14:44 -07:00
Linus Torvalds
48d554418d ARM: timer cleanup work
These are split out from the generic soc and driver updates because
 there was a lot of conflicting work by multiple people. Marc Zyngier
 worked on simplifying the "localtimer" interfaces, and some of the
 platforms are touching the same code as they move to device tree
 based booting.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'timer' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull "ARM: timer cleanup work" from Arnd Bergmann:
 "These are split out from the generic soc and driver updates because
  there was a lot of conflicting work by multiple people.  Marc Zyngier
  worked on simplifying the "localtimer" interfaces, and some of the
  platforms are touching the same code as they move to device tree based
  booting.

  Signed-off-by: Arnd Bergmann <arnd@arndb.de>"

* tag 'timer' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (61 commits)
  ARM: tegra: select USB_ULPI if USB is selected
  arm/tegra: pcie: fix return value of function
  ARM: ux500: fix compilation after local timer rework
  ARM: shmobile: remove additional __io() macro use
  ARM: local timers: make the runtime registration interface mandatory
  ARM: local timers: convert MSM to runtime registration interface
  ARM: local timers: convert exynos to runtime registration interface
  ARM: smp_twd: remove old local timer interface
  ARM: imx6q: convert to twd_local_timer_register() interface
  ARM: highbank: convert to twd_local_timer_register() interface
  ARM: ux500: convert to twd_local_timer_register() interface
  ARM: shmobile: convert to twd_local_timer_register() interface
  ARM: tegra: convert to twd_local_timer_register() interface
  ARM: plat-versatile: convert to twd_local_timer_register() interface
  ARM: OMAP4: convert to twd_local_timer_register() interface
  ARM: smp_twd: add device tree support
  ARM: smp_twd: add runtime registration support
  ARM: local timers: introduce a new registration interface
  ARM: smp_twd: make local_timer_stop a symbol instead of a #define
  ARM: mach-shmobile: default to no earlytimer
  ...
2012-03-27 16:06:17 -07:00
Linus Torvalds
d61b7a572b ARM: global cleanups
Quite a bit of code gets removed, and some stuff moved around, mostly
 the old samsung s3c24xx stuff. There should be no functional changes
 in this series otherwise. Some cleanups have dependencies on other
 arm-soc branches and will be sent in the second round.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull "ARM: global cleanups" from Arnd Bergmann:
 "Quite a bit of code gets removed, and some stuff moved around, mostly
  the old samsung s3c24xx stuff.  There should be no functional changes
  in this series otherwise.  Some cleanups have dependencies on other
  arm-soc branches and will be sent in the second round.

  Signed-off-by: Arnd Bergmann <arnd@arndb.de>"

Fixed up trivial conflicts mainly due to #include's being changes on
both sides.

* tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (121 commits)
  ep93xx: Remove unnecessary includes of ep93xx-regs.h
  ep93xx: Move EP93XX_SYSCON defines to SoC private header
  ep93xx: Move crunch code to mach-ep93xx directory
  ep93xx: Make syscon access functions private to SoC
  ep93xx: Configure GPIO ports in core code
  ep93xx: Move peripheral defines to local SoC header
  ep93xx: Convert the watchdog driver into a platform device.
  ep93xx: Use ioremap for backlight driver
  ep93xx: Move GPIO defines to gpio-ep93xx.h
  ep93xx: Don't use system controller defines in audio drivers
  ep93xx: Move PHYS_BASE defines to local SoC header file
  ARM: EXYNOS: Add clock register addresses for EXYNOS4X12 bus devfreq driver
  ARM: EXYNOS: add clock registers for exynos4x12-cpufreq
  PM / devfreq: update the name of EXYNOS clock registers that were omitted
  PM / devfreq: update the name of EXYNOS clock register
  ARM: EXYNOS: change the prefix S5P_ to EXYNOS4_ for clock
  ARM: EXYNOS: use static declaration on regarding clock
  ARM: EXYNOS: replace clock.c for other new EXYNOS SoCs
  ARM: OMAP2+: Fix build error after merge
  ARM: S3C24XX: remove call to s3c24xx_setup_clocks
  ...
2012-03-27 16:03:32 -07:00
Linus Torvalds
18d9946bc7 ARM: subarch maintainer updates
This is a collection of updates to the MAINTAINERS file, separated out
 mostly to give an overview of what has changed regarding who does what.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'maintainers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull "ARM: subarch maintainer updates" from Arnd Bergmann:
 "This is a collection of updates to the MAINTAINERS file, separated out
  mostly to give an overview of what has changed regarding who does
  what.

  Signed-off-by: Arnd Bergmann <arnd@arndb.de>"

* tag 'maintainers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: tegra: update main repo and add patchwork
  MAINTAINERS: update MAINTAINERS email entry
  MAINTAINERS: update maintainer entry for pxa/hx4700
  MAINTAINERS: ARM: tegra: update Stephen's email address
  MAINTAINERS: add TI DaVinci git tree information
  MAINTAINERS: mark TI DaVinci list as "moderated"
  MAINTAINERS: remove arch/arm/mach-mx*/ from IMX entry
2012-03-27 15:56:42 -07:00
Linus Torvalds
c8bc5e39ac ARM: Non-critical bug fixes
Simple bug fixes that were not considered important enough for inclusion
 into 3.3. One bug fix was originally intended for 3.3 but accidentally
 got missed, but is not marked stable because it should only get
 backported once later fixes also make it into v3.4.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'fixes-non-critical' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull "ARM: Non-critical bug fixes" from Ardn Bergmann:
 "Simple bug fixes that were not considered important enough for
  inclusion into 3.3.  One bug fix was originally intended for 3.3 but
  accidentally got missed, but is not marked stable because it should
  only get backported once later fixes also make it into v3.4.

  Signed-off-by: Arnd Bergmann <arnd@arndb.de>"

* tag 'fixes-non-critical' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (66 commits)
  iomux-mx25.h slew rate adjusted for LCD __LD pins
  ARM: davinci: DA850: move da850_register_pm to .init.text
  ARM: davinci: cpufreq: fix compiler warning
  ARM: OMAP2+: Fix build for omap4 only builds with missing include of linux/bug.h
  ARM: OMAP2+: Fix section warnings for hsmmc_init_one
  ARM: OMAP2+: Fix build issues with missing include of linux/bug.h
  ARM: OMAP2+: gpmc-smsc911x: only register regulator for first instance
  ARM: OMAP3+: PM: VP: fix integer truncation error
  ARM: OMAP2+: PM: fix wakeupgen warning when hotplug disabled
  ARM: OMAP2+: PM: fix section mismatch with omap2_init_processor_devices()
  ARM: OMAP2: Fix section warning for n8x0 when CONFIG_MMC_OMAP is not set
  ARM: OMAP2+: Fix omap24xx_io_desc warning if SoC subtypes are not selected
  ARM: OMAP1: Fix section mismatch for omap1_init_early()
  ARM: OMAP1: Fix typo in lcd_dma.c
  ARM: OMAP: mailbox: trivial whitespace fix
  ARM: OMAP: Remove definition cpu_is_omap4430()
  ARM: OMAP2+: included some headers twice
  ARM: OMAP: clock.c: included linux/debugfs.h twice
  ARM: OMAP: don't build hwspinlock in vain
  ARM: OMAP2+: ads7846_init: put gpio_pendown into pdata if it's provided
  ...
2012-03-27 15:55:54 -07:00