From: NeilBrown <neilb@suse.de>
Date: Tue, 9 Sep 2014 04:20:28 +0000 (+1000)
Subject: md: use wait_event() to simplify md_super_wait()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=1967cd5616c4792ef9d3cbaafe5fbe12fc429c9e;p=linux.git

md: use wait_event() to simplify md_super_wait()

md_super_wait is really just wait_event() open-coded.
So use the macro instead.

Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 4c72e9626effc..6be7146be5b33 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -766,14 +766,7 @@ void md_super_write(struct mddev *mddev, struct md_rdev *rdev,
 void md_super_wait(struct mddev *mddev)
 {
 	/* wait for all superblock writes that were scheduled to complete */
-	DEFINE_WAIT(wq);
-	for(;;) {
-		prepare_to_wait(&mddev->sb_wait, &wq, TASK_UNINTERRUPTIBLE);
-		if (atomic_read(&mddev->pending_writes)==0)
-			break;
-		schedule();
-	}
-	finish_wait(&mddev->sb_wait, &wq);
+	wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0);
 }
 
 int sync_page_io(struct md_rdev *rdev, sector_t sector, int size,