block: switch bdgrab to use igrab
authorChristoph Hellwig <hch@lst.de>
Fri, 27 Nov 2020 15:45:27 +0000 (16:45 +0100)
committerJens Axboe <axboe@kernel.dk>
Tue, 1 Dec 2020 21:53:39 +0000 (14:53 -0700)
commit3a4174e68684e43ecdcb59126a441b29d5e94f7f
treea6538a19c9bb3a47297434f2c17da51492ad3565
parent612c6aa7817f1c89b6a92fc724331aa7c9d77f6e
block: switch bdgrab to use igrab

All of the current callers already have a reference, but to prepare for
additional users ensure bdgrab returns NULL if the block device is being
freed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
fs/block_dev.c