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Michel Lespinasse 91af708141 rwsem: Test for no active locks in __rwsem_do_wake undo code 
If there are no active threasd using a semaphore, it is always correct
to unqueue blocked threads.  This seems to be what was intended in the
undo code.

What was done instead, was to look for a sem count of zero - this is an
impossible situation, given that at least one thread is known to be
queued on the semaphore.  The code might be correct as written, but it's
hard to reason about and it's not what was intended (otherwise the goto
out would have been unconditional).

Go for checking the active count - the alternative is not worth the
headache.

Signed-off-by: Michel Lespinasse <walken@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-12 18:23:34 -07:00
..
lzo
lib: add support for LZO-compressed kernels
2010-01-11 09:34:04 -08:00
reed_solomon
lib: Remove unnecessary inclusions of asm/semaphore.h
2008-04-18 22:17:17 -04:00
zlib_deflate
trivial: fix typo "to to" in multiple files
2009-09-21 15:14:55 +02:00
zlib_inflate
inflate_fast: sout is already a short so ptr arith was off by one.
2010-03-12 15:52:44 -08:00
.gitignore
Add some basic .gitignore files
2005-10-18 08:26:15 -07:00
argv_split.c
tree-wide: convert open calls to remove spaces to skip_spaces() lib function
2009-12-15 08:53:32 -08:00
atomic64.c
lib: export generic atomic64_t functions
2009-07-29 19:10:35 -07:00
audit.c
[PATCH] audit signal recipients
2007-05-11 05:38:25 -04:00
bcd.c
rtc: BCD codeshrink
2008-07-24 10:47:33 -07:00
bitmap.c
bitmap: use for_each_set_bit()
2010-03-06 11:26:35 -08:00
bitrev.c
lib: export bitrev16
2008-06-06 11:29:10 -07:00
btree.c
[LogFS] add new flash file system
2009-11-20 20:13:39 +01:00
bug.c
allow bug table entries to use relative pointers (and use it on x86-64)
2008-12-16 18:40:32 +01:00
bust_spinlocks.c
oops handling: ensure that any oops is flushed to the mtdoops console
2009-01-06 15:59:11 -08:00
check_signature.c
uninline check_signature()
2007-07-16 09:05:50 -07:00
checksum.c
lib/checksum: fix one more thinko
2009-11-03 16:06:53 +01:00
cmdline.c
generic, memparse(): constify argument
2008-07-28 15:05:23 +02:00
cpumask.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
crc7.c
CRC7 support
2007-07-17 10:23:04 -07:00
crc16.c
[PATCH] kernel-doc for lib/crc*.c
2006-06-25 10:01:20 -07:00
crc32.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
crc32defs.h
…
crc-ccitt.c
[PATCH] kernel-doc for lib/crc*.c
2006-06-25 10:01:20 -07:00
crc-itu-t.c
CRC ITU-T V.41
2007-05-10 18:24:13 +02:00
crc-t10dif.c
[SCSI] lib: Add support for the T10 (SCSI) Data Integrity Field CRC
2008-07-12 08:22:32 -05:00
ctype.c
ctype: constify read-only _ctype string
2009-12-15 08:53:32 -08:00
debug_locks.c
rcu: Introduce lockdep-based checking to RCU read-side primitives
2010-02-25 09:40:59 +01:00
debugobjects.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
dec_and_lock.c
atomic: only take lock when the counter drops to zero on UP as well
2009-06-16 19:47:47 -07:00
decompress_bunzip2.c
bzip2: Add missing checks for malloc returning NULL
2009-12-15 14:04:19 -08:00
decompress_inflate.c
lzma/gzip: fix potential oops when input data is truncated
2009-09-24 07:21:05 -07:00
decompress_unlzma.c
lzma/gzip: fix potential oops when input data is truncated
2009-09-24 07:21:05 -07:00
decompress_unlzo.c
lib: fix the use of LZO to decompress initramfs images
2010-04-24 11:31:25 -07:00
decompress.c
Add LZO compression support for initramfs and old-style initrd
2010-01-11 09:34:05 -08:00
devres.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
div64.c
add an inlined version of iter_div_u64_rem
2008-06-12 10:47:58 +02:00
dma-debug.c
dma-debug: Cleanup for copy-loop in filter_write()
2010-04-07 14:36:27 +02:00
dump_stack.c
…
dynamic_debug.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
extable.c
module: trim exception table on init free.
2009-06-12 21:47:04 +09:30
fault-inject.c
headers: remove sched.h from interrupt.h
2009-10-11 11:20:58 -07:00
find_last_bit.c
bitmap: find_last_bit()
2009-01-01 10:12:19 +10:30
find_next_bit.c
bitops: remove "optimizations"
2008-04-29 08:11:16 -07:00
flex_array.c
flex_array: fix the panic when calling flex_array_alloc() without __GFP_ZERO
2010-04-24 11:31:24 -07:00
gcd.c
lib: add lib/gcd.c
2009-06-18 13:04:05 -07:00
gen_crc32table.c
…
genalloc.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
halfmd4.c
…
hexdump.c
hexdump: remove the trailing space
2009-06-16 19:47:51 -07:00
hweight.c
x86, core: Optimize hweight32()
2009-12-28 10:41:39 +01:00
idr.c
idr: Apply lockdep-based diagnostics to rcu_dereference() uses
2010-02-25 10:34:51 +01:00
inflate.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
int_sqrt.c
[PATCH] lib: Fix bug in int_sqrt() for 64 bit longs
2006-02-03 08:32:08 -08:00
iomap_copy.c
[PATCH] add __iowrite64_copy
2006-06-20 20:24:58 -07:00
iomap.c
Use WARN() in lib/
2008-07-26 12:00:07 -07:00
iommu-helper.c
iommu-helper: use bitmap library
2009-12-16 07:20:18 -08:00
ioremap.c
lib/ioremap.c should #include <linux/io.h>
2007-10-17 08:42:50 -07:00
irq_regs.c
[PATCH] irq_reqs: export __irq_regs
2006-10-06 08:53:40 -07:00
is_single_threaded.c
kernel: is_current_single_threaded: don't use ->mmap_sem
2009-07-17 09:11:31 +10:00
kasprintf.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
Kconfig
Revert "lib: build list_sort() only if needed"
2010-03-07 09:54:44 -08:00
Kconfig.debug
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
2010-04-13 00:28:45 -07:00
Kconfig.kgdb
kgdb: remove the requirement for CONFIG_FRAME_POINTER
2008-08-01 08:39:34 -05:00
Kconfig.kmemcheck
kmemcheck: depend on HAVE_ARCH_KMEMCHECK
2009-07-01 22:28:44 +02:00
kernel_lock.c
bkl: Fixup core_lock fallout
2009-12-14 23:55:33 +01:00
klist.c
driver core: Remove completion from struct klist_node
2009-01-06 10:44:30 -08:00
kobject_uevent.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
kobject.c
Driver core: Constify struct sysfs_ops in struct kobj_type
2010-03-07 17:04:49 -08:00
kref.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
lcm.c
block: Fix overrun in lcm() and move it to lib
2010-03-15 12:47:59 +01:00
libcrc32c.c
libcrc32c: Fix "crc32c undefined" compilation error
2008-12-25 11:01:42 +11:00
list_debug.c
list debugging: use WARN() instead of BUG()
2008-07-25 10:53:29 -07:00
list_sort.c
lib: revise list_sort() header comment
2010-03-06 11:26:35 -08:00
lmb.c
lmb: Add lmb_free()
2010-02-03 17:39:50 +11:00
locking-selftest-hardirq.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-mutex.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-rlock-hardirq.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-rlock-softirq.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-rlock.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-rsem.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-softirq.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-spin-hardirq.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-spin-softirq.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-spin.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-wlock-hardirq.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-wlock-softirq.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-wlock.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest-wsem.h
[PATCH] lockdep: locking API self tests
2006-07-03 15:27:03 -07:00
locking-selftest.c
locking: rename trace_softirq_[enter|exit] => lockdep_softirq_[enter|exit]
2009-03-13 01:32:36 +01:00
lru_cache.c
The DRBD driver
2009-10-01 21:17:49 +02:00
Makefile
block: Fix overrun in lcm() and move it to lib
2010-03-15 12:47:59 +01:00
nlattr.c
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6
2009-03-26 22:45:23 -07:00
parser.c
parser: remove unnecessary strlen()
2009-12-15 08:53:33 -08:00
percpu_counter.c
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-01-06 17:10:04 -08:00
plist.c
plist: Make plist debugging raw_spinlock aware
2009-12-14 23:55:33 +01:00
prio_heap.c
lib: fix sparse shadowed variable warning
2009-01-06 15:59:11 -08:00
prio_tree.c
…
proportions.c
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-01-06 17:10:04 -08:00
radix-tree.c
radix_tree_tag_get() is not as safe as the docs make out [ver #2]
2010-04-09 10:12:03 -07:00
random32.c
random32: seeding improvement
2008-07-30 16:29:19 -07:00
ratelimit.c
ratelimit: fix the return value when __ratelimit() fails to acquire the lock
2010-04-07 08:38:04 -07:00
rational.c
lib/rational.c needs module.h
2010-01-11 09:34:05 -08:00
rbtree.c
rb_tree: remove redundant if()-condition in rb_erase()
2009-06-16 19:47:56 -07:00
reciprocal_div.c
[PATCH] SLAB: use a multiply instead of a divide in obj_to_index()
2006-12-13 09:05:49 -08:00
rwsem-spinlock.c
rwsem generic spinlock: use IRQ save/restore spinlocks
2010-04-07 16:15:05 -07:00
rwsem.c
rwsem: Test for no active locks in __rwsem_do_wake undo code
2010-05-12 18:23:34 -07:00
scatterlist.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
sha1.c
[PATCH] Numerous fixes to kernel-doc info in source files.
2007-02-11 10:51:32 -08:00
show_mem.c
mm: use the same log level for show_mem()
2010-03-06 11:26:27 -08:00
smp_processor_id.c
cpumask: convert lib/smp_processor_id to new cpumask ops
2009-01-30 15:47:34 +01:00
sort.c
generic swap(): lib/sort.c: rename swap to swap_func
2009-01-08 08:31:14 -08:00
spinlock_debug.c
locking: Further name space cleanups
2009-12-14 23:55:33 +01:00
string_helpers.c
[SCSI] lib: string_get_size(): don't hang on zero; no decimals on exact
2008-10-23 11:42:20 -05:00
string.c
lib/string.c: simplify strnstr()
2010-03-06 11:26:35 -08:00
swiotlb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
syscall.c
task_current_syscall
2008-07-26 12:00:10 -07:00
textsearch.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
ts_bm.c
textsearch: ts_bm: support case insensitive searching in Boyer-Moore algorithm
2008-07-08 02:37:54 -07:00
ts_fsm.c
textsearch: ts_fsm: return error on request for case insensitive search
2008-07-08 02:38:27 -07:00
ts_kmp.c
textsearch: ts_kmp: support case insensitive searching in Knuth-Morris-Pratt algorithm
2008-07-08 02:38:09 -07:00
vsprintf.c
lib/vsprintf.c: add missing EXPORT_SYMBOL(simple_strtoll)
2010-04-24 11:31:26 -07:00