reiserfs: use bdev_nr_bytes instead of open coding it

Use the proper helper to read the block device size and remove two
cargo culted checks that can't be false.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20211018101130.1838532-23-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 58481f8..8647a00 100644 (file)
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1986,9 +1986,7 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
         * smaller than the filesystem. If the check fails then abort and
         * scream, because bad stuff will happen otherwise.
         */
-       if (s->s_bdev && s->s_bdev->bd_inode
-           && i_size_read(s->s_bdev->bd_inode) <
-           sb_block_count(rs) * sb_blocksize(rs)) {
+       if (bdev_nr_bytes(s->s_bdev) < sb_block_count(rs) * sb_blocksize(rs)) {
                SWARN(silent, s, "", "Filesystem cannot be "
                      "mounted because it is bigger than the device");
                SWARN(silent, s, "", "You may need to run fsck "