linux-kernel - [PATCH 18/32] closures: closure_nr

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Date:   Tue,  9 May 2023 12:56:43 -0400
From:   Kent Overstreet <kent.overstreet@...ux.dev>
To:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-bcachefs@...r.kernel.org
Cc:     Kent Overstreet <kent.overstreet@...ux.dev>
Subject: [PATCH 18/32] closures: closure_nr_remaining()

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

Signed-off-by: Kent Overstreet <kent.overstreet@...ux.dev>
---
 include/linux/closure.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/linux/closure.h b/include/linux/closure.h
index 36b4a83f9b..722a586bb2 100644
--- a/include/linux/closure.h
+++ b/include/linux/closure.h
@@ -172,6 +172,11 @@ void __closure_wake_up(struct closure_waitlist *list);
 bool closure_wait(struct closure_waitlist *list, 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
  *
@@ -180,7 +185,7 @@ 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);
 }
 
-- 
2.40.1