| commit | 2fc391112fb6f3424435a3aa2fda887497b5f807 | |
| author | Peter Zijlstra <peterz@infradead.org> | |
| Mon, 10 Aug 2009 11:33:05 +0000 (10 12:33 +0100) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Mon, 10 Aug 2009 12:43:09 +0000 (10 14:43 +0200) | ||
| tree | 89cda7002d591807536dca68b6344a558b081428 | treesnapshot (tar.gz zip) |
| parent | beda2c7ea2c15ed01eef00a997d2b0496c3a502d | commitdiff |
locking, sched: Give waitqueue spinlocks their own lockdep classes
Give waitqueue spinlocks their own lockdep classes when they
are initialised from init_waitqueue_head(). This means that
struct wait_queue::func functions can operate other waitqueues.
This is used by CacheFiles to catch the page from a backing fs
being unlocked and to wake up another thread to take a copy of
it.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Takashi Iwai <tiwai@suse.de>
Cc: linux-cachefs@redhat.com
Cc: torvalds@osdl.org
Cc: akpm@linux-foundation.org
LKML-Reference: <20090810113305.17284.81508.stgit@warthog.procyon.org.uk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Give waitqueue spinlocks their own lockdep classes when they
are initialised from init_waitqueue_head(). This means that
struct wait_queue::func functions can operate other waitqueues.
This is used by CacheFiles to catch the page from a backing fs
being unlocked and to wake up another thread to take a copy of
it.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Takashi Iwai <tiwai@suse.de>
Cc: linux-cachefs@redhat.com
Cc: torvalds@osdl.org
Cc: akpm@linux-foundation.org
LKML-Reference: <20090810113305.17284.81508.stgit@warthog.procyon.org.uk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| include/linux/wait.h | diffblobblamehistory | |
| kernel/wait.c | diffblobblamehistory |