[PATCH 03/16] loop: Fold __loop_release into loop_release

Jan Kara
2018-11-08T13:01:03Z

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

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 63008e879771..3de2cd94225a 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1641,12 +1641,15 @@ static int lo_open(struct block_device *bdev, fmode_t mode)
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) {
@@ -1656,7 +1659,7 @@ static void __lo_release(struct loop_device *lo)
*/
err = loop_clr_fd(lo);
if (!err)
- return;
+ goto unlock_index;
} else if (lo->lo_state == Lo_bound) {
/*
* Otherwise keep thread (if running) and config,
@@ -1667,12 +1670,7 @@ static void __lo_release(struct loop_device *lo)
}

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);
}

--
2.16.4