1 /* SPDX-License-Identifier: GPL-2.0 */
12 #include <linux/backing-dev-defs.h>
30  * fs/fs-writeback.c
48 	 * For a_ops->writepages(): if start or end are non-zero then this is
59 	unsigned tagged_writepages:1;	/* tag-and-write to avoid livelock */
75 	/* To enable batching of swap writes to non-block-device backends,
100 	if (wbc->punt_to_cgroup)  in wbc_to_write_flags()
103 	if (wbc->sync_mode == WB_SYNC_ALL)  in wbc_to_write_flags()
105 	else if (wbc->for_kupdate || wbc->for_background)  in wbc_to_write_flags()
113 	((wbc)->wb ? (wbc)->wb->blkcg_css : blkcg_root_css)
153 	 * exceeded state and throttle heavy/light dirtiers alike. To
157 	 * Both fields are protected by ->lock.
164  * wb_domain_size_changed - memory available to a wb_domain has changed
177 	spin_lock(&dom->lock);  in wb_domain_size_changed()
178 	dom->dirty_limit_tstamp = jiffies;  in wb_domain_size_changed()
179 	dom->dirty_limit = 0;  in wb_domain_size_changed()
180 	spin_unlock(&dom->lock);  in wb_domain_size_changed()
184  * fs/fs-writeback.c
202 	wait_on_bit(&inode->i_state, __I_NEW, TASK_UNINTERRUPTIBLE);  in wait_on_inode()
213 	__releases(&inode->i_lock);
223  * inode_attach_wb - associate an inode with its wb
229  * @inode->i_lock.
233 	if (!inode->i_wb)  in inode_attach_wb()
238  * inode_detach_wb - disassociate an inode from its wb
245 	if (inode->i_wb) {  in inode_detach_wb()
246 		WARN_ON_ONCE(!(inode->i_state & I_CLEAR));  in inode_detach_wb()
247 		wb_put(inode->i_wb);  in inode_detach_wb()
248 		inode->i_wb = NULL;  in inode_detach_wb()
253  * wbc_attach_fdatawrite_inode - associate wbc and inode for fdatawrite
264 	spin_lock(&inode->i_lock);  in wbc_attach_fdatawrite_inode()
270  * wbc_init_bio - writeback specific initializtion of bio
287 	if (wbc->wb)  in wbc_init_bio()
288 		bio_associate_blkg_from_css(bio, wbc->wb->blkcg_css);  in wbc_init_bio()
303 	__releases(&inode->i_lock)  in wbc_attach_and_unlock_inode()
305 	spin_unlock(&inode->i_lock);  in wbc_attach_and_unlock_inode()
333  * mm/page-writeback.c