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Commit a49294ea authored by David Howells's avatar David Howells
Browse files

Add wait_var_event_interruptible() 



Add wait_var_event_interruptible() to allow interruptible waits for events.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
parent d0660f0b

include/linux/wait_bit.h

+13 −0
Original line number Diff line number Diff line
@@ -305,6 +305,19 @@ do { \ 
	__ret;								\

})



#define __wait_var_event_interruptible(var, condition)			\

	___wait_var_event(var, condition, TASK_INTERRUPTIBLE, 0, 0,	\

			  schedule())



#define wait_var_event_interruptible(var, condition)			\

({									\

	int __ret = 0;							\

	might_sleep();							\

	if (!(condition))						\

		__ret = __wait_var_event_interruptible(var, condition);	\

	__ret;								\

})



/**

 * clear_and_wake_up_bit - clear a bit and wake up anyone waiting on that bit

 *