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| author | Ingo Molnar <mingo@elte.hu> | 2006-07-03 11:24:28 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-04 02:27:00 +0400 |
| commit | 8b3db9c542e18b71d4820da4dd9401ee030feacb (patch) | |
| tree | 93e093fcb0a01b3ee06329e57d92d73d66207edd | |
| parent | d7e9629de051bb4b1d104588cd97673ad770809e (diff) | |
| download | linux-8b3db9c542e18b71d4820da4dd9401ee030feacb.tar.xz | |
[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>
| -rw-r--r-- | include/linux/completion.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/completion.h b/include/linux/completion.h index 90663ad217f9..251c41e3ddd5 100644 --- a/include/linux/completion.h +++ b/include/linux/completion.h @@ -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; |