4 files changed, 21 insertions, 14 deletions

diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 685e3ef9e900..88ddc9828c6c 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -311,14 +311,6 @@ static void __gfs2_glock_put(struct gfs2_glock *gl)
 	sdp->sd_lockstruct.ls_ops->lm_put_lock(gl);
 }
 
-/*
- * Cause the glock to be put in work queue context.
- */
-void gfs2_glock_queue_put(struct gfs2_glock *gl)
-{
-	gfs2_glock_queue_work(gl, 0);
-}
-
 /**
  * gfs2_glock_put() - Decrement reference count on glock
  * @gl: The glock to put
@@ -333,6 +325,22 @@ void gfs2_glock_put(struct gfs2_glock *gl)
 	__gfs2_glock_put(gl);
 }
 
+/*
+ * gfs2_glock_put_async - Decrement reference count without sleeping
+ * @gl: The glock to put
+ *
+ * Decrement the reference count on glock immediately unless it is the last
+ * reference.  Defer putting the last reference to work queue context.
+ */
+void gfs2_glock_put_async(struct gfs2_glock *gl)
+{
+	if (lockref_put_or_lock(&gl->gl_lockref))
+		return;
+
+	__gfs2_glock_queue_work(gl, 0);
+	spin_unlock(&gl->gl_lockref.lock);
+}
+
 /**
  * may_grant - check if it's ok to grant a new lock
  * @gl: The glock
@@ -2533,8 +2541,7 @@ static void gfs2_glock_iter_next(struct gfs2_glock_iter *gi, loff_t n)
 	if (gl) {
 		if (n == 0)
 			return;
-		if (!lockref_put_not_zero(&gl->gl_lockref))
-			gfs2_glock_queue_put(gl);
+		gfs2_glock_put_async(gl);
 	}
 	for (;;) {
 		gl = rhashtable_walk_next(&gi->hti);
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index f7ee9ca948ee..29fd58de0597 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -186,7 +186,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
 		   int create, struct gfs2_glock **glp);
 struct gfs2_glock *gfs2_glock_hold(struct gfs2_glock *gl);
 void gfs2_glock_put(struct gfs2_glock *gl);
-void gfs2_glock_queue_put(struct gfs2_glock *gl);
+void gfs2_glock_put_async(struct gfs2_glock *gl);
 
 void __gfs2_holder_init(struct gfs2_glock *gl, unsigned int state,
 		        u16 flags, struct gfs2_holder *gh,
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index 767549066066..2be5551241b3 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -790,7 +790,7 @@ void gfs2_glock_remove_revoke(struct gfs2_glock *gl)
 {
 	if (atomic_dec_return(&gl->gl_revokes) == 0) {
 		clear_bit(GLF_LFLUSH, &gl->gl_flags);
-		gfs2_glock_queue_put(gl);
+		gfs2_glock_put_async(gl);
 	}
 }
 
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 1200cb805999..b37f8bd79286 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1054,7 +1054,7 @@ static int gfs2_drop_inode(struct inode *inode)
 
 		gfs2_glock_hold(gl);
 		if (!gfs2_queue_try_to_evict(gl))
-			gfs2_glock_queue_put(gl);
+			gfs2_glock_put_async(gl);
 		return 0;
 	}
 
@@ -1270,7 +1270,7 @@ out_qs:
 static void gfs2_glock_put_eventually(struct gfs2_glock *gl)
 {
 	if (current->flags & PF_MEMALLOC)
-		gfs2_glock_queue_put(gl);
+		gfs2_glock_put_async(gl);
 	else
 		gfs2_glock_put(gl);
 }