->permission() sanitizing: pass MAY_NOT_BLOCK to ->check_acl()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index ddc5301..6747470 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -879,7 +879,7 @@
 	if (get_inode_sd_version(inode) == STAT_DATA_V1)
 		return -EAGAIN;
 
-	if (flags & IPERM_FLAG_RCU)
+	if (mask & MAY_NOT_BLOCK)
 		return -ECHILD;
 
 	acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);