xfs: use a local variable for magic number in xfs_da3_node_lookup_int

Use a local variable for the block magic number checks instead of
abusing blk->magic.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>

diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c
index 9efbd20..8ffe17b 100644 (file)
--- a/fs/xfs/libxfs/xfs_da_btree.c
+++ b/fs/xfs/libxfs/xfs_da_btree.c
@@ -1481,6 +1481,7 @@ xfs_da3_node_lookup_int(
        int                     error;
        int                     retval;
        unsigned int            expected_level = 0;
+       uint16_t                magic;
        struct xfs_inode        *dp = state->args->dp;
 
        args = state->args;
@@ -1505,17 +1506,17 @@ xfs_da3_node_lookup_int(
                        return error;
                }
                curr = blk->bp->b_addr;
-               blk->magic = be16_to_cpu(curr->magic);
+               magic = be16_to_cpu(curr->magic);
 
-               if (blk->magic == XFS_ATTR_LEAF_MAGIC ||
-                   blk->magic == XFS_ATTR3_LEAF_MAGIC) {
+               if (magic == XFS_ATTR_LEAF_MAGIC ||
+                   magic == XFS_ATTR3_LEAF_MAGIC) {
                        blk->magic = XFS_ATTR_LEAF_MAGIC;
                        blk->hashval = xfs_attr_leaf_lasthash(blk->bp, NULL);
                        break;
                }
 
-               if (blk->magic == XFS_DIR2_LEAFN_MAGIC ||
-                   blk->magic == XFS_DIR3_LEAFN_MAGIC) {
+               if (magic == XFS_DIR2_LEAFN_MAGIC ||
+                   magic == XFS_DIR3_LEAFN_MAGIC) {
                        blk->magic = XFS_DIR2_LEAFN_MAGIC;
                        blk->hashval = xfs_dir2_leaf_lasthash(args->dp,
                                                              blk->bp, NULL);