forked from luck/tmp_suning_uos_patched
8b3db9c542
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>
55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
#ifndef __LINUX_COMPLETION_H
|
|
#define __LINUX_COMPLETION_H
|
|
|
|
/*
|
|
* (C) Copyright 2001 Linus Torvalds
|
|
*
|
|
* Atomic wait-for-completion handler data structures.
|
|
* See kernel/sched.c for details.
|
|
*/
|
|
|
|
#include <linux/wait.h>
|
|
|
|
struct completion {
|
|
unsigned int done;
|
|
wait_queue_head_t wait;
|
|
};
|
|
|
|
#define COMPLETION_INITIALIZER(work) \
|
|
{ 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) }
|
|
|
|
#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;
|
|
init_waitqueue_head(&x->wait);
|
|
}
|
|
|
|
extern void FASTCALL(wait_for_completion(struct completion *));
|
|
extern int FASTCALL(wait_for_completion_interruptible(struct completion *x));
|
|
extern unsigned long FASTCALL(wait_for_completion_timeout(struct completion *x,
|
|
unsigned long timeout));
|
|
extern unsigned long FASTCALL(wait_for_completion_interruptible_timeout(
|
|
struct completion *x, unsigned long timeout));
|
|
|
|
extern void FASTCALL(complete(struct completion *));
|
|
extern void FASTCALL(complete_all(struct completion *));
|
|
|
|
#define INIT_COMPLETION(x) ((x).done = 0)
|
|
|
|
#endif
|