fs/nilfs2/page.c

34 	struct buffer_head *bh = folio_buffers(folio);
36 	if (!bh)
37 		bh = create_empty_buffers(folio, 1 << blkbits, b_state);
40 	bh = get_nth_bh(bh, block - first_block);
42 	wait_on_buffer(bh);
43 	return bh;
54 	struct buffer_head *bh;
60 	bh = __nilfs_get_folio_block(folio, blkoff, index, blkbits, b_state);
61 	if (unlikely(!bh)) {
66 	bh->b_bdev = inode->i_sb->s_bdev;
67 	return bh;
72  * @bh: buffer head of the buffer to be discarded
74 void nilfs_forget_buffer(struct buffer_head *bh)
76 	struct folio *folio = bh->b_folio;
83 	lock_buffer(bh);
84 	set_mask_bits(&bh->b_state, clear_bits, 0);
88 	bh->b_blocknr = -1;
91 	unlock_buffer(bh);
92 	brelse(bh);
105 	struct buffer_head *bh;
117 	bh = dbh;
119 	while ((bh = bh->b_this_page) != dbh) {
120 		lock_buffer(bh);
121 		bits &= bh->b_state;
122 		unlock_buffer(bh);
142 	struct buffer_head *bh, *head;
144 	bh = head = folio_buffers(folio);
146 		if (buffer_dirty(bh))
148 		bh = bh->b_this_page;
149 	} while (bh != head);
155 	struct buffer_head *bh, *head;
176 		bh = head;
180 			       i++, bh, atomic_read(&bh->b_count),
181 			       (unsigned long long)bh->b_blocknr, bh->b_state);
182 			bh = bh->b_this_page;
183 		} while (bh != head);
402 	struct buffer_head *bh, *head;
417 		bh = head;
419 			if (atomic_read(&bh->b_count) | buffer_locked(bh)) {
423 		} while (bh = bh->b_this_page, bh != head);
433 		bh = head;
435 			lock_buffer(bh);
436 			set_mask_bits(&bh->b_state, clear_bits, 0);
437 			unlock_buffer(bh);
438 		} while (bh = bh->b_this_page, bh != head);
451 	struct buffer_head *bh, *head;
454 	for (bh = head = folio_buffers(folio), block_start = 0;
455 	     bh != head || !block_start;
456 	     block_start = block_end, bh = bh->b_this_page) {
457 		block_end = block_start + bh->b_size;
458 		if (block_end > from && block_start < to && !buffer_dirty(bh))
535 			struct buffer_head *bh, *head;
539 			bh = head = folio_buffers(folio);
543 				if (buffer_delay(bh)) {
550 			} while (++b, bh = bh->b_this_page, bh != head);