618  * Get ref for the oldest snapc for an inode with dirty data... that is, the
725 	struct ceph_snap_context *snapc, *oldest;  in write_folio_nounlock()  local
749 	oldest = get_oldest_context(inode, &ceph_wbc, snapc);  in write_folio_nounlock()
750 	if (snapc->seq > oldest->seq) {  in write_folio_nounlock()
755 		ceph_put_snap_context(oldest);  in write_folio_nounlock()
759 	ceph_put_snap_context(oldest);  in write_folio_nounlock()
854 	oldest = folio_detach_private(folio);  in write_folio_nounlock()
855 	WARN_ON_ONCE(oldest != snapc);  in write_folio_nounlock()
1075 	/* find oldest snap context with dirty data */  in ceph_define_writeback_range()
1084 	doutc(cl, " oldest snapc is %p seq %lld (%d snaps)\n",  in ceph_define_writeback_range()
1156 		doutc(cl, "folio snapc %p %lld != oldest %p %lld\n",  in ceph_check_page_before_write()
1772 	struct ceph_snap_context *oldest = get_oldest_context(inode, NULL, NULL);  in context_is_writeable_or_written()  local
1773 	int ret = !oldest || snapc->seq <= oldest->seq;  in context_is_writeable_or_written()
1775 	ceph_put_snap_context(oldest);  in context_is_writeable_or_written()
1804 		struct ceph_snap_context *snapc, *oldest;  in ceph_find_incompatible()  local
1816 		oldest = get_oldest_context(inode, NULL, NULL);  in ceph_find_incompatible()
1817 		if (snapc->seq > oldest->seq) {  in ceph_find_incompatible()
1819 			ceph_put_snap_context(oldest);  in ceph_find_incompatible()
1820 			doutc(cl, " %llx.%llx folio %p snapc %p not current or oldest\n",  in ceph_find_incompatible()
1824 		ceph_put_snap_context(oldest);  in ceph_find_incompatible()
1827 		doutc(cl, " %llx.%llx folio %p snapc %p not current, but oldest\n",  in ceph_find_incompatible()