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closures: closure_nr_remaining()

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Factor out a new helper, which returns the number of events outstanding.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-03-04 02:39:39 -05:00
parent ced58fc7ab
commit 48b7935722
1 changed files with 6 additions and 1 deletions
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7
include/linux/closure.h
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@ -172,6 +172,11 @@ void __closure_wake_up(struct closure_waitlist *list);
bool closure_wait(struct closure_waitlist *list, struct closure *cl); bool closure_wait(struct closure_waitlist *list, struct closure *cl);
void __closure_sync(struct closure *cl); void __closure_sync(struct closure *cl);
static inline unsigned closure_nr_remaining(struct closure *cl)
{
return atomic_read(&cl->remaining) & CLOSURE_REMAINING_MASK;
}
/** /**
* closure_sync - sleep until a closure a closure has nothing left to wait on * closure_sync - sleep until a closure a closure has nothing left to wait on
* *
@ -180,7 +185,7 @@ void __closure_sync(struct closure *cl);
*/ */
static inline void closure_sync(struct closure *cl) static inline void closure_sync(struct closure *cl)
{ {
if ((atomic_read(&cl->remaining) & CLOSURE_REMAINING_MASK) != 1) if (closure_nr_remaining(cl) != 1)
__closure_sync(cl); __closure_sync(cl);
} }