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Commit 8b3db9c5 authored by Ingo Molnar's avatar Ingo Molnar Committed by Linus Torvalds
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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: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent d7e9629d

include/linux/completion.h

+12 −0
Original line number Diff line number Diff line
@@ -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;