forked from mirrors/linux
f86bf9b7bc
Clean up lockdep on-stack-completion initializer. (This also removes the dependency on waitqueue_lock_key.) Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
#ifndef __LINUX_COMPLETION_H
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#define __LINUX_COMPLETION_H
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/*
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* (C) Copyright 2001 Linus Torvalds
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*
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* Atomic wait-for-completion handler data structures.
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* See kernel/sched.c for details.
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*/
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#include <linux/wait.h>
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struct completion {
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unsigned int done;
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wait_queue_head_t wait;
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};
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#define COMPLETION_INITIALIZER(work) \
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{ 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) }
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#define COMPLETION_INITIALIZER_ONSTACK(work) \
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({ init_completion(&work); work; })
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#define DECLARE_COMPLETION(work) \
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struct completion work = COMPLETION_INITIALIZER(work)
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/*
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* Lockdep needs to run a non-constant initializer for on-stack
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* completions - so we use the _ONSTACK() variant for those that
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* are on the kernel stack:
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*/
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#ifdef CONFIG_LOCKDEP
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# define DECLARE_COMPLETION_ONSTACK(work) \
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struct completion work = COMPLETION_INITIALIZER_ONSTACK(work)
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#else
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# define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work)
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#endif
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static inline void init_completion(struct completion *x)
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{
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x->done = 0;
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init_waitqueue_head(&x->wait);
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}
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extern void FASTCALL(wait_for_completion(struct completion *));
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extern int FASTCALL(wait_for_completion_interruptible(struct completion *x));
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extern unsigned long FASTCALL(wait_for_completion_timeout(struct completion *x,
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unsigned long timeout));
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extern unsigned long FASTCALL(wait_for_completion_interruptible_timeout(
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struct completion *x, unsigned long timeout));
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extern void FASTCALL(complete(struct completion *));
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extern void FASTCALL(complete_all(struct completion *));
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#define INIT_COMPLETION(x) ((x).done = 0)
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#endif
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