xfs: add helper for verifying checksums on xfs_bufs

Many/most callers of xfs_verify_cksum() pass bp->b_addr and
BBTOB(bp->b_length) as the first 2 args.  Add a helper
which can just accept the bp and the crc offset, and work
it out on its own, for brevity.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c
index ae47ec6e16c4..1a412eb0e4de 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/fs/xfs/xfs_dir2_leaf.c
@@ -180,8 +180,7 @@ __read_verify(
         struct xfs_mount        *mp = bp->b_target->bt_mount;
 
         if ((xfs_sb_version_hascrc(&mp->m_sb) &&
-             !xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
-                                          XFS_DIR3_LEAF_CRC_OFF)) ||
+             !xfs_buf_verify_cksum(bp, XFS_DIR3_LEAF_CRC_OFF)) ||
             !xfs_dir3_leaf_verify(bp, magic)) {
                 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
                 xfs_buf_ioerror(bp, EFSCORRUPTED);