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zram: cleanup backing_dev_store

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Use blkdev_get_by_dev instead of bdgrab + blkdev_get.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-09-21 09:19:50 +02:00 committed by Jens Axboe
parent b8d954849c
commit 0fc66c9d63
1 changed files with 4 additions and 3 deletions
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7
drivers/block/zram/zram_drv.c
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@ -491,9 +491,10 @@ static ssize_t backing_dev_store(struct device *dev,
goto out;
}
bdev = bdgrab(I_BDEV(inode));
err = blkdev_get(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL, zram);
if (err < 0) {
bdev = blkdev_get_by_dev(inode->i_rdev,
FMODE_READ | FMODE_WRITE | FMODE_EXCL, zram);
if (IS_ERR(bdev)) {
err = PTR_ERR(bdev);
bdev = NULL;
goto out;
}