518 void wbc_attach_and_unlock_inode(struct writeback_control *wbc,  in wbc_attach_and_unlock_inode()  argument
526 	wbc->wb = inode_to_wb(inode);  in wbc_attach_and_unlock_inode()
527 	wbc->inode = inode;  in wbc_attach_and_unlock_inode()
529 	wbc->wb_id = wbc->wb->memcg_css->id;  in wbc_attach_and_unlock_inode()
530 	wbc->wb_lcand_id = inode->i_wb_frn_winner;  in wbc_attach_and_unlock_inode()
531 	wbc->wb_tcand_id = 0;  in wbc_attach_and_unlock_inode()
532 	wbc->wb_bytes = 0;  in wbc_attach_and_unlock_inode()
533 	wbc->wb_lcand_bytes = 0;  in wbc_attach_and_unlock_inode()
534 	wbc->wb_tcand_bytes = 0;  in wbc_attach_and_unlock_inode()
536 	wb_get(wbc->wb);  in wbc_attach_and_unlock_inode()
543 	if (unlikely(wb_dying(wbc->wb)))  in wbc_attach_and_unlock_inode()
544 		inode_switch_wbs(inode, wbc->wb_id);  in wbc_attach_and_unlock_inode()
584 void wbc_detach_inode(struct writeback_control *wbc)  in wbc_detach_inode()  argument
586 	struct bdi_writeback *wb = wbc->wb;  in wbc_detach_inode()
587 	struct inode *inode = wbc->inode;  in wbc_detach_inode()
599 	if (wbc->wb_bytes >= wbc->wb_lcand_bytes &&  in wbc_detach_inode()
600 	    wbc->wb_bytes >= wbc->wb_tcand_bytes) {  in wbc_detach_inode()
601 		max_id = wbc->wb_id;  in wbc_detach_inode()
602 		max_bytes = wbc->wb_bytes;  in wbc_detach_inode()
603 	} else if (wbc->wb_lcand_bytes >= wbc->wb_tcand_bytes) {  in wbc_detach_inode()
604 		max_id = wbc->wb_lcand_id;  in wbc_detach_inode()
605 		max_bytes = wbc->wb_lcand_bytes;  in wbc_detach_inode()
607 		max_id = wbc->wb_tcand_id;  in wbc_detach_inode()
608 		max_bytes = wbc->wb_tcand_bytes;  in wbc_detach_inode()
640 		if (wbc->wb_id != max_id)  in wbc_detach_inode()
662 	wb_put(wbc->wb);  in wbc_detach_inode()
663 	wbc->wb = NULL;  in wbc_detach_inode()
676 void wbc_account_io(struct writeback_control *wbc, struct page *page,  in wbc_account_io()  argument
687 	if (!wbc->wb)  in wbc_account_io()
694 	if (id == wbc->wb_id) {  in wbc_account_io()
695 		wbc->wb_bytes += bytes;  in wbc_account_io()
699 	if (id == wbc->wb_lcand_id)  in wbc_account_io()
700 		wbc->wb_lcand_bytes += bytes;  in wbc_account_io()
703 	if (!wbc->wb_tcand_bytes)  in wbc_account_io()
704 		wbc->wb_tcand_id = id;  in wbc_account_io()
705 	if (id == wbc->wb_tcand_id)  in wbc_account_io()
706 		wbc->wb_tcand_bytes += bytes;  in wbc_account_io()
708 		wbc->wb_tcand_bytes -= min(bytes, wbc->wb_tcand_bytes);  in wbc_account_io()
1124 static int write_inode(struct inode *inode, struct writeback_control *wbc)  in write_inode()  argument
1129 		trace_writeback_write_inode_start(inode, wbc);  in write_inode()
1130 		ret = inode->i_sb->s_op->write_inode(inode, wbc);  in write_inode()
1131 		trace_writeback_write_inode(inode, wbc);  in write_inode()
1196 			  struct writeback_control *wbc)  in requeue_inode()  argument
1207 	    (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages))  in requeue_inode()
1210 	if (wbc->pages_skipped) {  in requeue_inode()
1224 		if (wbc->nr_to_write <= 0) {  in requeue_inode()
1259 __writeback_single_inode(struct inode *inode, struct writeback_control *wbc)  in __writeback_single_inode()  argument
1262 	long nr_to_write = wbc->nr_to_write;  in __writeback_single_inode()
1268 	trace_writeback_single_inode_start(inode, wbc, nr_to_write);  in __writeback_single_inode()
1270 	ret = do_writepages(mapping, wbc);  in __writeback_single_inode()
1279 	if (wbc->sync_mode == WB_SYNC_ALL && !wbc->for_sync) {  in __writeback_single_inode()
1328 		int err = write_inode(inode, wbc);  in __writeback_single_inode()
1332 	trace_writeback_single_inode(inode, wbc, nr_to_write);  in __writeback_single_inode()
1345 				  struct writeback_control *wbc)  in writeback_single_inode()  argument
1357 		if (wbc->sync_mode != WB_SYNC_ALL)  in writeback_single_inode()
1376 	    (wbc->sync_mode != WB_SYNC_ALL ||  in writeback_single_inode()
1380 	wbc_attach_and_unlock_inode(wbc, inode);  in writeback_single_inode()
1382 	ret = __writeback_single_inode(inode, wbc);  in writeback_single_inode()
1384 	wbc_detach_inode(wbc);  in writeback_single_inode()
1445 	struct writeback_control wbc = {  in writeback_sb_inodes()  local
1493 		if ((inode->i_state & I_SYNC) && wbc.sync_mode != WB_SYNC_ALL) {  in writeback_sb_inodes()
1523 		wbc_attach_and_unlock_inode(&wbc, inode);  in writeback_sb_inodes()
1526 		wbc.nr_to_write = write_chunk;  in writeback_sb_inodes()
1527 		wbc.pages_skipped = 0;  in writeback_sb_inodes()
1533 		__writeback_single_inode(inode, &wbc);  in writeback_sb_inodes()
1535 		wbc_detach_inode(&wbc);  in writeback_sb_inodes()
1536 		work->nr_pages -= write_chunk - wbc.nr_to_write;  in writeback_sb_inodes()
1537 		wrote += write_chunk - wbc.nr_to_write;  in writeback_sb_inodes()
1560 		requeue_inode(inode, tmp_wb, &wbc);  in writeback_sb_inodes()
2355 	struct writeback_control wbc = {  in write_inode_now()  local
2363 		wbc.nr_to_write = 0;  in write_inode_now()
2366 	return writeback_single_inode(inode, &wbc);  in write_inode_now()
2381 int sync_inode(struct inode *inode, struct writeback_control *wbc)  in sync_inode()  argument
2383 	return writeback_single_inode(inode, wbc);  in sync_inode()
2398 	struct writeback_control wbc = {  in sync_inode_metadata()  local
2403 	return sync_inode(inode, &wbc);  in sync_inode_metadata()