575  * Get ref for the oldest snapc for an inode with dirty data... that is, the
681 	struct ceph_snap_context *snapc, *oldest;  in writepage_nounlock()  local
705 	oldest = get_oldest_context(inode, &ceph_wbc, snapc);  in writepage_nounlock()
706 	if (snapc->seq > oldest->seq) {  in writepage_nounlock()
711 		ceph_put_snap_context(oldest);  in writepage_nounlock()
715 	ceph_put_snap_context(oldest);  in writepage_nounlock()
810 	oldest = detach_page_private(page);  in writepage_nounlock()
811 	WARN_ON_ONCE(oldest != snapc);  in writepage_nounlock()
1006 	/* find oldest snap context with dirty data */  in ceph_writepages_start()
1014 	doutc(cl, " oldest snapc is %p seq %lld (%d snaps)\n", snapc,  in ceph_writepages_start()
1086 				doutc(cl, "page snapc %p %lld != oldest %p %lld\n",  in ceph_writepages_start()
1441 	struct ceph_snap_context *oldest = get_oldest_context(inode, NULL, NULL);  in context_is_writeable_or_written()  local
1442 	int ret = !oldest || snapc->seq <= oldest->seq;  in context_is_writeable_or_written()
1444 	ceph_put_snap_context(oldest);  in context_is_writeable_or_written()
1473 		struct ceph_snap_context *snapc, *oldest;  in ceph_find_incompatible()  local
1485 		oldest = get_oldest_context(inode, NULL, NULL);  in ceph_find_incompatible()
1486 		if (snapc->seq > oldest->seq) {  in ceph_find_incompatible()
1488 			ceph_put_snap_context(oldest);  in ceph_find_incompatible()
1489 			doutc(cl, " %llx.%llx page %p snapc %p not current or oldest\n",  in ceph_find_incompatible()
1493 		ceph_put_snap_context(oldest);  in ceph_find_incompatible()
1496 		doutc(cl, " %llx.%llx page %p snapc %p not current, but oldest\n",  in ceph_find_incompatible()