41 static int write_mmp_block(struct super_block *sb, struct buffer_head *bh)  in write_mmp_block()  argument
43 	struct mmp_struct *mmp = (struct mmp_struct *)(bh->b_data);  in write_mmp_block()
51 	lock_buffer(bh);  in write_mmp_block()
52 	bh->b_end_io = end_buffer_write_sync;  in write_mmp_block()
53 	get_bh(bh);  in write_mmp_block()
54 	submit_bh(WRITE_SYNC | REQ_META | REQ_PRIO, bh);  in write_mmp_block()
55 	wait_on_buffer(bh);  in write_mmp_block()
57 	if (unlikely(!buffer_uptodate(bh)))  in write_mmp_block()
67 static int read_mmp_block(struct super_block *sb, struct buffer_head **bh,  in read_mmp_block()  argument
73 	if (*bh)  in read_mmp_block()
74 		clear_buffer_uptodate(*bh);  in read_mmp_block()
79 	if (!*bh) {  in read_mmp_block()
80 		*bh = sb_getblk(sb, mmp_block);  in read_mmp_block()
81 		if (!*bh) {  in read_mmp_block()
87 	get_bh(*bh);  in read_mmp_block()
88 	lock_buffer(*bh);  in read_mmp_block()
89 	(*bh)->b_end_io = end_buffer_read_sync;  in read_mmp_block()
90 	submit_bh(READ_SYNC | REQ_META | REQ_PRIO, *bh);  in read_mmp_block()
91 	wait_on_buffer(*bh);  in read_mmp_block()
92 	if (!buffer_uptodate(*bh)) {  in read_mmp_block()
93 		brelse(*bh);  in read_mmp_block()
94 		*bh = NULL;  in read_mmp_block()
99 	mmp = (struct mmp_struct *)((*bh)->b_data);  in read_mmp_block()
133 	struct buffer_head *bh = ((struct mmpd_data *) data)->bh;  in kmmpd()  local
146 	mmp = (struct mmp_struct *)(bh->b_data);  in kmmpd()
155 	bdevname(bh->b_bdev, mmp->mmp_bdevname);  in kmmpd()
168 		retval = write_mmp_block(sb, bh);  in kmmpd()
248 	retval = write_mmp_block(sb, bh);  in kmmpd()
252 	brelse(bh);  in kmmpd()
278 	struct buffer_head *bh = NULL;  in ext4_multi_mount_protect()  local
292 	retval = read_mmp_block(sb, &bh, mmp_block);  in ext4_multi_mount_protect()
296 	mmp = (struct mmp_struct *)(bh->b_data);  in ext4_multi_mount_protect()
330 	retval = read_mmp_block(sb, &bh, mmp_block);  in ext4_multi_mount_protect()
333 	mmp = (struct mmp_struct *)(bh->b_data);  in ext4_multi_mount_protect()
347 	retval = write_mmp_block(sb, bh);  in ext4_multi_mount_protect()
359 	retval = read_mmp_block(sb, &bh, mmp_block);  in ext4_multi_mount_protect()
362 	mmp = (struct mmp_struct *)(bh->b_data);  in ext4_multi_mount_protect()
375 	mmpd_data->bh = bh;  in ext4_multi_mount_protect()
381 					     bdevname(bh->b_bdev,  in ext4_multi_mount_protect()
394 	brelse(bh);  in ext4_multi_mount_protect()