is_ancestor      3712 fs/btrfs/send.c 			ret = is_ancestor(sctx->parent_root,
is_ancestor      3978 fs/btrfs/send.c 				ret = is_ancestor(sctx->parent_root,
is_ancestor      1047 fs/gfs2/super.c 	if (is_ancestor(root, sdp->sd_master_dir))
is_ancestor       355 kernel/seccomp.c 		     is_ancestor(thread->seccomp.filter,