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Subject[PATCH 4.4 068/104] loop: Fold __loop_release into loop_release
Date
4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

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);
}


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