From fb1c3ec7ebf8679beb0e5a52bc94cb93999fb93c Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Sat, 9 Dec 2017 12:42:44 -0500 Subject: closures: closure_wait_event() --- include/linux/closure.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/include/linux/closure.h b/include/linux/closure.h index 261d06729013..d6a4f454396d 100644 --- a/include/linux/closure.h +++ b/include/linux/closure.h @@ -378,4 +378,26 @@ static inline void closure_call(struct closure *cl, closure_fn fn, continue_at_nobarrier(cl, fn, wq); } +#define __closure_wait_event(waitlist, _cond) \ +do { \ + struct closure cl; \ + \ + closure_init_stack(&cl); \ + \ + while (1) { \ + closure_wait(waitlist, &cl); \ + if (_cond) \ + break; \ + closure_sync(&cl); \ + } \ + closure_wake_up(waitlist); \ + closure_sync(&cl); \ +} while (0) + +#define closure_wait_event(waitlist, _cond) \ +do { \ + if (!(_cond)) \ + __closure_wait_event(waitlist, _cond); \ +} while (0) + #endif /* _LINUX_CLOSURE_H */ -- cgit v1.2.3