gfs2: Switch to wait_event in gfs2_logd

[ Upstream commit 6df373b ]

In gfs2_logd(), switch from an open-coded wait loop to
wait_event_interruptible_timeout().

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Stable-dep-of: b74cd55 ("gfs2: low-memory forced flush fixes")
Signed-off-by: Sasha Levin <sashal@kernel.org>

fs/gfs2/log.c

@@ -1304,7 +1304,6 @@ int gfs2_logd(void *data)
 {
 	struct gfs2_sbd *sdp = data;
 	unsigned long t = 1;
-	DEFINE_WAIT(wait);
 
 	while (!kthread_should_stop()) {
 
@@ -1341,17 +1340,11 @@ int gfs2_logd(void *data)
 
 		try_to_freeze();
 
-		do {
-			prepare_to_wait(&sdp->sd_logd_waitq, &wait,
-					TASK_INTERRUPTIBLE);
-			if (!gfs2_ail_flush_reqd(sdp) &&
-			    !gfs2_jrnl_flush_reqd(sdp) &&
-			    !kthread_should_stop())
-				t = schedule_timeout(t);
-		} while(t && !gfs2_ail_flush_reqd(sdp) &&
-			!gfs2_jrnl_flush_reqd(sdp) &&
-			!kthread_should_stop());
-		finish_wait(&sdp->sd_logd_waitq, &wait);
+		t = wait_event_interruptible_timeout(sdp->sd_logd_waitq,
+				gfs2_ail_flush_reqd(sdp) ||
+				gfs2_jrnl_flush_reqd(sdp) ||
+				kthread_should_stop(),
+				t);
 	}
 
 	return 0;