if (rc || (xlen == 0)) 
if (rc || (xaddr == 0)) 
static struct metapage *get_index_page(struct inode *inode, s64 blkno){	int rc;	s64 xaddr;	int xflag;	s32 xlen;	rc = xtLookup(inode, blkno, 1, &xflag, &xaddr, &xlen, 1);	if (rc || (xlen == 0))		return NULL;	return get_metapage(inode, xaddr, PSIZE, 1);}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/6628465e33ca694bd8fd5c3cf4eb7ff9177bc694/jfs_dtree.c/buggy/fs/jfs/jfs_dtree.c