JFS: Fix off-by one error when symlink size == 256 bytes

fs/jfs/inode.c

@@ -59,7 +59,7 @@ struct inode *jfs_iget(struct super_block *sb, ino_t ino)
 		inode->i_mapping->a_ops = &jfs_aops;
 		inode->i_mapping->gfp_mask = GFP_NOFS;
 	} else if (S_ISLNK(inode->i_mode)) {
-		if (inode->i_size > IDATASIZE) {
+		if (inode->i_size >= IDATASIZE) {
 			inode->i_op = &page_symlink_inode_operations;
 			inode->i_mapping->a_ops = &jfs_aops;
 		} else

fs/jfs/namei.c

@@ -602,7 +602,7 @@ s64 commitZeroLink(tid_t tid, struct inode *ip)
 		break;
 	case S_IFLNK:
 		/* fast symbolic link */
-		if (ip->i_size <= 256) {
+		if (ip->i_size < IDATASIZE) {
 			ip->i_size = 0;
 			return 0;
 		}
@@ -674,7 +674,7 @@ int freeZeroLink(struct inode *ip)
 		break;
 	case S_IFLNK:
 		/* if its contained in inode nothing to do */
-		if (ip->i_size <= 256)
+		if (ip->i_size < IDATASIZE)
 			return 0;
 		break;
 	default: