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lglocks and brlocks are currently generated with some complicated macros
in lglock.h. But there's no reason to not just use common utility
functions and put all the data into a common data structure.
In preparation, this patch changes the API to look more like normal
function calls with pointers, not magic macros.
The patch is rather large because I move over all users in one go to keep
it bisectable. This impacts the VFS somewhat in terms of lines changed.
But no actual behaviour change.
[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
lglocks and brlocks are currently generated with some complicated macros
in lglock.h. But there's no reason to not just use common utility
functions and put all the data into a common data structure.
Since there are at least two users it makes sense to share this code in a
library. This is also easier maintainable than a macro forest.
This will also make it later possible to dynamically allocate lglocks and
also use them in modules (this would both still need some additional, but
now straightforward, code)
[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Optimizing the slow paths adds a lot of complexity. If you need to
grab every lock often, you have other problems.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
seeing that "fast" symlinks still get allocation + copy, we might as
well simply switch them to pagecache-based variant of ->follow_link();
just need an appropriate ->readpage() for them...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Fix kernel-doc warnings in fs/inode.c:
Warning(fs/inode.c:1493): No description found for parameter 'path'
Warning(fs/inode.c:1493): Excess function parameter 'mnt' description in 'touch_atime'
Warning(fs/inode.c:1493): Excess function parameter 'dentry' description in 'touch_atime'
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
a couple of le32 and le16 used with wrong le..._to_cpu(), plus
idiotic use of le32_to_cpu() on 1-bit bitfield
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
ocfs2_block_check is for little-endian contents; if we just want to
its fields converted to host-endian in a couple of functions, just
put those values into local u32 and u16...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
In *all* callers we have a dentry of child of that directory.
Just use ->d_parent of that one, for fsck sake...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
a) %d does _not_ produce a page worth of output
b) snprintf() doesn't return negatives - it used to in old glibc, but
that's the kernel...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Use parent_inode has a flag for whether nfsd wants a connectable fh, but
generate one opportunistically so that we can take advantage of the
additional info in there.
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
pass inode + parent's inode or NULL instead of dentry + bool saying
whether we want the parent or not.
NOTE: that needs ceph fix folded in.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Pull CIFS updates from Steve French.
* 'for-next' of git://git.samba.org/sfrench/cifs-2.6: (29 commits)
cifs: fix oops while traversing open file list (try #4)
cifs: Fix comment as d_alloc_root() is replaced by d_make_root()
CIFS: Introduce SMB2 mounts as vers=2.1
CIFS: Introduce SMB2 Kconfig option
CIFS: Move add/set_credits and get_credits_field to ops structure
CIFS: Move protocol specific demultiplex thread calls to ops struct
CIFS: Move protocol specific part from cifs_readv_receive to ops struct
CIFS: Move header_size/max_header_size to ops structure
CIFS: Move protocol specific part from SendReceive2 to ops struct
cifs: Include backup intent search flags during searches {try #2)
CIFS: Separate protocol specific part from setlk
CIFS: Separate protocol specific part from getlk
CIFS: Separate protocol specific lock type handling
CIFS: Convert lock type to 32 bit variable
CIFS: Move locks to cifsFileInfo structure
cifs: convert send_nt_cancel into a version specific op
cifs: add a smb_version_operations/values structures and a smb_version enum
cifs: remove the vers= and version= synonyms for ver=
cifs: add warning about change in default cache semantics in 3.7
cifs: display cache= option in /proc/mounts
...
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Merge tag 'mfd-3.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
Pull MFD changes from Samuel Ortiz:
"Besides the usual cleanups, this one brings:
* Support for 5 new chipsets: Intel's ICH LPC and SCH Centerton,
ST-E's STAX211, Samsung's MAX77693 and TI's LM3533.
* Device tree support for the twl6040, tps65910, da9502 and ab8500
drivers.
* Fairly big tps56910, ab8500 and db8500 updates.
* i2c support for mc13xxx.
* Our regular update for the wm8xxx driver from Mark."
Fix up various conflicts with other trees, largely due to ab5500 removal
etc.
* tag 'mfd-3.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (106 commits)
mfd: Fix build break of max77693 by adding REGMAP_I2C option
mfd: Fix twl6040 build failure
mfd: Fix max77693 build failure
mfd: ab8500-core should depend on MFD_DB8500_PRCMU
gpio: tps65910: dt: process gpio specific device node info
mfd: Remove the parsing of dt info for tps65910 gpio
mfd: Save device node parsed platform data for tps65910 sub devices
mfd: Add r_select to lm3533 platform data
gpio: Add Intel Centerton support to gpio-sch
mfd: Emulate active low IRQs as well as active high IRQs for wm831x
mfd: Mark two lm3533 zone registers as volatile
mfd: Fix return type of lm533 attribute is_visible
mfd: Enable Device Tree support in the ab8500-pwm driver
mfd: Enable Device Tree support in the ab8500-sysctrl driver
mfd: Add support for Device Tree to twl6040
mfd: Register the twl6040 child for the ASoC codec unconditionally
mfd: Allocate twl6040 IRQ numbers dynamically
mfd: twl6040 code cleanup in interrupt initialization part
mfd: Enable ab8500-gpadc driver for Device Tree
mfd: Prevent unassigned pointer from being used in ab8500-gpadc driver
...
New features include:
- Rewrite the O_DIRECT code so that it can share the same coalescing and
pNFS functionality as the page cache code.
- Allow the server to provide hints as to when we should use pNFS, and
when it is more efficient to read and write through the metadata
server.
- NFS cache consistency updates:
- Use the ctime to emulate a change attribute for NFSv2/v3 so that
all NFS versions can share the same cache management code.
- New cache management code will only look at the change attribute
and size attribute when deciding whether or not our cached data
is still valid or not.
- Don't request NFSv4 post-op attributes on writes in cases such as
O_DIRECT, where we don't care about data cache consistency, or
when we have a write delegation, and know that our cache is
still consistent.
- Don't request NFSv4 post-op attributes on operations such as
COMMIT, where there are no expected metadata updates.
- Don't request NFSv4 directory post-op attributes in cases where
the operations themselves already return change attribute updates:
i.e. operations such as OPEN, CREATE, REMOVE, LINK and RENAME.
- Speed up 'ls' and friends by using READDIR rather than READDIRPLUS
if we detect no attempts to lookup filenames.
- Improve the code sharing between NFSv2/v3 and v4 mounts
- NFSv4.1 state management efficiency improvements
- More patches in preparation for NFSv4/v4.1 migration functionality.
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Merge tag 'nfs-for-3.5-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust:
"New features include:
- Rewrite the O_DIRECT code so that it can share the same coalescing
and pNFS functionality as the page cache code.
- Allow the server to provide hints as to when we should use pNFS,
and when it is more efficient to read and write through the
metadata server.
- NFS cache consistency updates:
* Use the ctime to emulate a change attribute for NFSv2/v3 so that
all NFS versions can share the same cache management code.
* New cache management code will only look at the change attribute
and size attribute when deciding whether or not our cached data
is still valid or not.
* Don't request NFSv4 post-op attributes on writes in cases such as
O_DIRECT, where we don't care about data cache consistency, or
when we have a write delegation, and know that our cache is still
consistent.
* Don't request NFSv4 post-op attributes on operations such as
COMMIT, where there are no expected metadata updates.
* Don't request NFSv4 directory post-op attributes in cases where
the operations themselves already return change attribute
updates: i.e. operations such as OPEN, CREATE, REMOVE, LINK and
RENAME.
- Speed up 'ls' and friends by using READDIR rather than READDIRPLUS
if we detect no attempts to lookup filenames.
- Improve the code sharing between NFSv2/v3 and v4 mounts
- NFSv4.1 state management efficiency improvements
- More patches in preparation for NFSv4/v4.1 migration functionality."
Fix trivial conflict in fs/nfs/nfs4proc.c that was due to the dcache
qstr name initialization changes (that made the length/hash a 64-bit
union)
* tag 'nfs-for-3.5-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (146 commits)
NFSv4: Add debugging printks to state manager
NFSv4: Map NFS4ERR_SHARE_DENIED into an EACCES error instead of EIO
NFSv4: update_changeattr does not need to set NFS_INO_REVAL_PAGECACHE
NFSv4.1: nfs4_reset_session should use nfs4_handle_reclaim_lease_error
NFSv4.1: Handle other occurrences of NFS4ERR_CONN_NOT_BOUND_TO_SESSION
NFSv4.1: Handle NFS4ERR_CONN_NOT_BOUND_TO_SESSION in the state manager
NFSv4.1: Handle errors in nfs4_bind_conn_to_session
NFSv4.1: nfs4_bind_conn_to_session should drain the session
NFSv4.1: Don't clobber the seqid if exchange_id returns a confirmed clientid
NFSv4.1: Add DESTROY_CLIENTID
NFSv4.1: Ensure we use the correct credentials for bind_conn_to_session
NFSv4.1: Ensure we use the correct credentials for session create/destroy
NFSv4.1: Move NFSPROC4_CLNT_BIND_CONN_TO_SESSION to the end of the operations
NFSv4.1: Handle NFS4ERR_SEQ_MISORDERED when confirming the lease
NFSv4: When purging the lease, we must clear NFS4CLNT_LEASE_CONFIRM
NFSv4: Clean up the error handling for nfs4_reclaim_lease
NFSv4.1: Exchange ID must use GFP_NOFS allocation mode
nfs41: Use BIND_CONN_TO_SESSION for CB_PATH_DOWN*
nfs4.1: add BIND_CONN_TO_SESSION operation
NFSv4.1 test the mdsthreshold hint parameters
...
This is caused by tty_release using tty_lock_pair to lock both sides of
the pty/tty pair, and then tty_ldisc_release dropping and relocking one
side only. We can drop both fine, so drop both to avoid any lock
ordering concerns.
Rework the release path to fix the new locking model.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The ptmx_open path takes the tty and devpts locks in the wrong order
because tty_init_dev locks and returns a locked tty. As far as I can
tell this is actually safe anyway because the tty being returned is new
so nobody can get a reference to lock it at this point.
However we don't even need the devpts lock at this point, it's only held
as a byproduct of the way the locks were pushe down.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If a file OPEN is denied due to a share lock, the resulting
NFS4ERR_SHARE_DENIED is currently mapped to the default EIO.
This patch adds a more appropriate mapping, and brings Linux
into line with what Solaris 10 does.
See https://bugzilla.kernel.org/show_bug.cgi?id=43286
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
Pull exofs updates from Boaz Harrosh:
"Just a couple of patches. The first is a BUG fix destined for stable
which missed the 3.4-rc7 Kernel. The second is just a fixture
addition so exofs is able to be better exported as a cluster file
system via pNFS."
* 'for-linus' of git://git.open-osd.org/linux-open-osd:
exofs: Add SYSFS info for autologin/pNFS export
exofs: Fix CRASH on very early IO errors.
Pull documentation updates from Jiri Kosina:
"I am currently relaying documentation patches through 'doc' branch of
trivial tree, until Rob, the new documentation maintainer, has
established a proper tree."
* 'doc' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
doc: ext3: update documentation with barrier=1 default
Documentation/initrd.txt: Change the location of util-linux
Documentation/SubmittingPatches: suggested the use of scripts/get_maintainer.pl
Documentation/kernel-parameters: remove autotest and mcatest
Pull misc kbuild changes from Michal Marek:
"The non-critical part of kbuild for 3.5 includes
- two new coccinelle checks
- fix for make deb-pkg to include generated headers in arch/*/include
I have more make-deb-pkg fixes in the backlog, but these will likely
have to wait for 3.6."
* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
builddeb: include autogenerated header files
scripts/coccinelle: sizeof of pointer
scripts/coccinelle: address test is always true
Pull kconfig changes from Michal Marek:
- Error handling for make KCONFIG_ALLCONFIG=<...> all*config plus a fix
for a bug that was exposed by this
- Fix for the script/config utility.
* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
scripts/config: properly report and set string options
kbuild: all{no,yes,mod,def,rand}config only read files when instructed to.
kconfig: Add error handling to KCONFIG_ALLCONFIG
Pull kbuild updates from Michal Marek.
Fixed up nontrivial merge conflict in Makefile as per Stephen Rothwell
and linux-next (and trivial arch/sparc/Makefile changes due to removed
sparc32 logic).
* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
mips: Fix KBUILD_CPPFLAGS definition
kbuild: fix ia64 link
kbuild: document KBUILD_LDS, KBUILD_VMLINUX_{INIT,MAIN} and LDFLAGS_vmlinux
kbuild: link of vmlinux moved to a script
kbuild: refactor final link of sparc32
kbuild: drop unused KBUILD_VMLINUX_OBJS from top-level Makefile
kbuild: Makefile: remove unnecessary check for m68knommu ARCH
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Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
Pull writeback tree from Wu Fengguang:
"Mainly from Jan Kara to avoid iput() in the flusher threads."
* tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:
writeback: Avoid iput() from flusher thread
vfs: Rename end_writeback() to clear_inode()
vfs: Move waiting for inode writeback from end_writeback() to evict_inode()
writeback: Refactor writeback_single_inode()
writeback: Remove wb->list_lock from writeback_single_inode()
writeback: Separate inode requeueing after writeback
writeback: Move I_DIRTY_PAGES handling
writeback: Move requeueing when I_SYNC set to writeback_sb_inodes()
writeback: Move clearing of I_SYNC into inode_sync_complete()
writeback: initialize global_dirty_limit
fs: remove 8 bytes of padding from struct writeback_control on 64 bit builds
mm: page-writeback.c: local functions should not be exposed globally
Pull microblaze changes from Michal Simek.
* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: Setup correct pointer to TLS area
microblaze: Add TLS support to sys_clone
microblaze: ftrace: Pass the first calling instruction for dynamic ftrace
microblaze: Port OOM changes to do_page_fault
microblaze: Do not select GENERIC_GPIO by default
