4.14-stable patches

[thirdparty/kernel/stable-queue.git] / releases / 4.4.172 / loop-fold-__loop_release-into-loop_release.patch

From 967d1dc144b50ad005e5eecdfadfbcfb399ffff6 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Thu, 8 Nov 2018 14:01:03 +0100
Subject: loop: Fold __loop_release into loop_release

From: Jan Kara <jack@suse.cz>

commit 967d1dc144b50ad005e5eecdfadfbcfb399ffff6 upstream.

__loop_release() has a single call site. Fold it there. This is
currently not a huge win but it will make following replacement of
loop_index_mutex more obvious.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/block/loop.c |   16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1586,12 +1586,15 @@ out:
 	return err;
 }
 
-static void __lo_release(struct loop_device *lo)
+static void lo_release(struct gendisk *disk, fmode_t mode)
 {
+	struct loop_device *lo;
 	int err;
 
+	mutex_lock(&loop_index_mutex);
+	lo = disk->private_data;
 	if (atomic_dec_return(&lo->lo_refcnt))
-		return;
+		goto unlock_index;
 
 	mutex_lock(&loop_ctl_mutex);
 	if (lo->lo_flags & LO_FLAGS_AUTOCLEAR) {
@@ -1601,7 +1604,7 @@ static void __lo_release(struct loop_dev
 		 */
 		err = loop_clr_fd(lo);
 		if (!err)
-			return;
+			goto unlock_index;
 	} else {
 		/*
 		 * Otherwise keep thread (if running) and config,
@@ -1611,12 +1614,7 @@ static void __lo_release(struct loop_dev
 	}
 
 	mutex_unlock(&loop_ctl_mutex);
-}
-
-static void lo_release(struct gendisk *disk, fmode_t mode)
-{
-	mutex_lock(&loop_index_mutex);
-	__lo_release(disk->private_data);
+unlock_index:
 	mutex_unlock(&loop_index_mutex);
 }