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| author | Pavel Emelianov <xemul@sw.ru> | 2007-05-08 09:29:10 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 20:15:09 +0200 |
| commit | 428e6ce023c5890cfecc8ad10335da3f28dbf893 (patch) | |
| tree | 17c746035cf727bc5494b9116ae6034724aaede3 /kernel/irq/handle.c | |
| parent | merge compat_ioctl.h into compat_ioctl.c (diff) | |
| download | linux-428e6ce023c5890cfecc8ad10335da3f28dbf893.tar.xz linux-428e6ce023c5890cfecc8ad10335da3f28dbf893.zip | |
Lockdep treats down_write_trylock like regular down_write
This causes constructions like
down_write(&mm1->mmap_sem);
if (down_write_trylock(&mm2->mmap_sem)) {
...
up_write(&mm2->mmap_sem);
}
up_write(&mm1->mmap_sem);
generate a lockdep warning about circular locking dependence.
Call rwsem_acquire() with trylock set to 1.
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: 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>
Diffstat (limited to 'kernel/irq/handle.c')
0 files changed, 0 insertions, 0 deletions