810 	struct buffer_head *bh;  in jbd2_journal_get_descriptor_buffer()  local
819 	bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);  in jbd2_journal_get_descriptor_buffer()
820 	if (!bh)  in jbd2_journal_get_descriptor_buffer()
822 	lock_buffer(bh);  in jbd2_journal_get_descriptor_buffer()
823 	memset(bh->b_data, 0, journal->j_blocksize);  in jbd2_journal_get_descriptor_buffer()
824 	set_buffer_uptodate(bh);  in jbd2_journal_get_descriptor_buffer()
825 	unlock_buffer(bh);  in jbd2_journal_get_descriptor_buffer()
826 	BUFFER_TRACE(bh, "return this buffer");  in jbd2_journal_get_descriptor_buffer()
827 	return bh;  in jbd2_journal_get_descriptor_buffer()
1137 	struct buffer_head *bh;  in jbd2_journal_init_dev()  local
1161 	bh = __getblk(journal->j_dev, start, journal->j_blocksize);  in jbd2_journal_init_dev()
1162 	if (!bh) {  in jbd2_journal_init_dev()
1168 	journal->j_sb_buffer = bh;  in jbd2_journal_init_dev()
1169 	journal->j_superblock = (journal_superblock_t *)bh->b_data;  in jbd2_journal_init_dev()
1189 	struct buffer_head *bh;  in jbd2_journal_init_inode()  local
1232 	bh = getblk_unmovable(journal->j_dev, blocknr, journal->j_blocksize);  in jbd2_journal_init_inode()
1233 	if (!bh) {  in jbd2_journal_init_inode()
1239 	journal->j_sb_buffer = bh;  in jbd2_journal_init_inode()
1240 	journal->j_superblock = (journal_superblock_t *)bh->b_data;  in jbd2_journal_init_inode()
1257 	struct buffer_head *bh = journal->j_sb_buffer;  in journal_fail_superblock()  local
1258 	brelse(bh);  in journal_fail_superblock()
1328 	struct buffer_head *bh = journal->j_sb_buffer;  in jbd2_write_superblock()  local
1335 	lock_buffer(bh);  in jbd2_write_superblock()
1336 	if (buffer_write_io_error(bh)) {  in jbd2_write_superblock()
1348 		clear_buffer_write_io_error(bh);  in jbd2_write_superblock()
1349 		set_buffer_uptodate(bh);  in jbd2_write_superblock()
1352 	get_bh(bh);  in jbd2_write_superblock()
1353 	bh->b_end_io = end_buffer_write_sync;  in jbd2_write_superblock()
1354 	ret = submit_bh(write_op, bh);  in jbd2_write_superblock()
1355 	wait_on_buffer(bh);  in jbd2_write_superblock()
1356 	if (buffer_write_io_error(bh)) {  in jbd2_write_superblock()
1357 		clear_buffer_write_io_error(bh);  in jbd2_write_superblock()
1358 		set_buffer_uptodate(bh);  in jbd2_write_superblock()
1470 	struct buffer_head *bh;  in journal_get_superblock()  local
1474 	bh = journal->j_sb_buffer;  in journal_get_superblock()
1476 	J_ASSERT(bh != NULL);  in journal_get_superblock()
1477 	if (!buffer_uptodate(bh)) {  in journal_get_superblock()
1478 		ll_rw_block(READ, 1, &bh);  in journal_get_superblock()
1479 		wait_on_buffer(bh);  in journal_get_superblock()
1480 		if (!buffer_uptodate(bh)) {  in journal_get_superblock()
1487 	if (buffer_verified(bh))  in journal_get_superblock()
1571 	set_buffer_verified(bh);  in journal_get_superblock()
2451 struct journal_head *jbd2_journal_add_journal_head(struct buffer_head *bh)  in jbd2_journal_add_journal_head()  argument
2457 	if (!buffer_jbd(bh))  in jbd2_journal_add_journal_head()
2460 	jbd_lock_bh_journal_head(bh);  in jbd2_journal_add_journal_head()
2461 	if (buffer_jbd(bh)) {  in jbd2_journal_add_journal_head()
2462 		jh = bh2jh(bh);  in jbd2_journal_add_journal_head()
2464 		J_ASSERT_BH(bh,  in jbd2_journal_add_journal_head()
2465 			(atomic_read(&bh->b_count) > 0) ||  in jbd2_journal_add_journal_head()
2466 			(bh->b_page && bh->b_page->mapping));  in jbd2_journal_add_journal_head()
2469 			jbd_unlock_bh_journal_head(bh);  in jbd2_journal_add_journal_head()
2475 		set_buffer_jbd(bh);  in jbd2_journal_add_journal_head()
2476 		bh->b_private = jh;  in jbd2_journal_add_journal_head()
2477 		jh->b_bh = bh;  in jbd2_journal_add_journal_head()
2478 		get_bh(bh);  in jbd2_journal_add_journal_head()
2479 		BUFFER_TRACE(bh, "added journal_head");  in jbd2_journal_add_journal_head()
2482 	jbd_unlock_bh_journal_head(bh);  in jbd2_journal_add_journal_head()
2485 	return bh->b_private;  in jbd2_journal_add_journal_head()
2492 struct journal_head *jbd2_journal_grab_journal_head(struct buffer_head *bh)  in jbd2_journal_grab_journal_head()  argument
2496 	jbd_lock_bh_journal_head(bh);  in jbd2_journal_grab_journal_head()
2497 	if (buffer_jbd(bh)) {  in jbd2_journal_grab_journal_head()
2498 		jh = bh2jh(bh);  in jbd2_journal_grab_journal_head()
2501 	jbd_unlock_bh_journal_head(bh);  in jbd2_journal_grab_journal_head()
2505 static void __journal_remove_journal_head(struct buffer_head *bh)  in __journal_remove_journal_head()  argument
2507 	struct journal_head *jh = bh2jh(bh);  in __journal_remove_journal_head()
2514 	J_ASSERT_BH(bh, buffer_jbd(bh));  in __journal_remove_journal_head()
2515 	J_ASSERT_BH(bh, jh2bh(jh) == bh);  in __journal_remove_journal_head()
2516 	BUFFER_TRACE(bh, "remove journal_head");  in __journal_remove_journal_head()
2519 		jbd2_free(jh->b_frozen_data, bh->b_size);  in __journal_remove_journal_head()
2523 		jbd2_free(jh->b_committed_data, bh->b_size);  in __journal_remove_journal_head()
2525 	bh->b_private = NULL;  in __journal_remove_journal_head()
2527 	clear_buffer_jbd(bh);  in __journal_remove_journal_head()
2537 	struct buffer_head *bh = jh2bh(jh);  in jbd2_journal_put_journal_head()  local
2539 	jbd_lock_bh_journal_head(bh);  in jbd2_journal_put_journal_head()
2543 		__journal_remove_journal_head(bh);  in jbd2_journal_put_journal_head()
2544 		jbd_unlock_bh_journal_head(bh);  in jbd2_journal_put_journal_head()
2545 		__brelse(bh);  in jbd2_journal_put_journal_head()
2547 		jbd_unlock_bh_journal_head(bh);  in jbd2_journal_put_journal_head()