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[PATCH] lockdep: add DECLARE_COMPLETION_ONSTACK() API 

lockdep needs to have the waitqueue lock initialized for on-stack waitqueues
implicitly initialized by DECLARE_COMPLETION().  Introduce the API.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar 2006-07-03 00:24:28 -07:00 committed by Linus Torvalds
parent d7e9629de0
commit 8b3db9c542
1 changed files with 12 additions and 0 deletions
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12
include/linux/completion.h
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@ -21,6 +21,18 @@ struct completion {
#define DECLARE_COMPLETION(work) \
struct completion work = COMPLETION_INITIALIZER(work)
/*
* Lockdep needs to run a non-constant initializer for on-stack
* completions - so we use the _ONSTACK() variant for those that
* are on the kernel stack:
*/
#ifdef CONFIG_LOCKDEP
# define DECLARE_COMPLETION_ONSTACK(work) \
struct completion work = ({ init_completion(&work); work; })
#else
# define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work)
#endif
static inline void init_completion(struct completion *x)
{
x->done = 0;