42 static int write_mmp_block(struct super_block *sb, struct buffer_head *bh)  in write_mmp_block()  argument
44 	struct mmp_struct *mmp = (struct mmp_struct *)(bh->b_data);  in write_mmp_block()
52 	lock_buffer(bh);  in write_mmp_block()
53 	bh->b_end_io = end_buffer_write_sync;  in write_mmp_block()
54 	get_bh(bh);  in write_mmp_block()
55 	submit_bh(REQ_OP_WRITE, REQ_SYNC | REQ_META | REQ_PRIO, bh);  in write_mmp_block()
56 	wait_on_buffer(bh);  in write_mmp_block()
58 	if (unlikely(!buffer_uptodate(bh)))  in write_mmp_block()
68 static int read_mmp_block(struct super_block *sb, struct buffer_head **bh,  in read_mmp_block()  argument
74 	if (*bh)  in read_mmp_block()
75 		clear_buffer_uptodate(*bh);  in read_mmp_block()
80 	if (!*bh) {  in read_mmp_block()
81 		*bh = sb_getblk(sb, mmp_block);  in read_mmp_block()
82 		if (!*bh) {  in read_mmp_block()
88 	get_bh(*bh);  in read_mmp_block()
89 	lock_buffer(*bh);  in read_mmp_block()
90 	(*bh)->b_end_io = end_buffer_read_sync;  in read_mmp_block()
91 	submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO, *bh);  in read_mmp_block()
92 	wait_on_buffer(*bh);  in read_mmp_block()
93 	if (!buffer_uptodate(*bh)) {  in read_mmp_block()
97 	mmp = (struct mmp_struct *)((*bh)->b_data);  in read_mmp_block()
108 	brelse(*bh);  in read_mmp_block()
109 	*bh = NULL;  in read_mmp_block()
135 	struct buffer_head *bh = ((struct mmpd_data *) data)->bh;  in kmmpd()  local
148 	mmp = (struct mmp_struct *)(bh->b_data);  in kmmpd()
157 	bdevname(bh->b_bdev, mmp->mmp_bdevname);  in kmmpd()
170 		retval = write_mmp_block(sb, bh);  in kmmpd()
245 	retval = write_mmp_block(sb, bh);  in kmmpd()
250 	brelse(bh);  in kmmpd()
276 	struct buffer_head *bh = NULL;  in ext4_multi_mount_protect()  local
290 	retval = read_mmp_block(sb, &bh, mmp_block);  in ext4_multi_mount_protect()
294 	mmp = (struct mmp_struct *)(bh->b_data);  in ext4_multi_mount_protect()
328 	retval = read_mmp_block(sb, &bh, mmp_block);  in ext4_multi_mount_protect()
331 	mmp = (struct mmp_struct *)(bh->b_data);  in ext4_multi_mount_protect()
345 	retval = write_mmp_block(sb, bh);  in ext4_multi_mount_protect()
357 	retval = read_mmp_block(sb, &bh, mmp_block);  in ext4_multi_mount_protect()
360 	mmp = (struct mmp_struct *)(bh->b_data);  in ext4_multi_mount_protect()
373 	mmpd_data->bh = bh;  in ext4_multi_mount_protect()
379 					     bdevname(bh->b_bdev,  in ext4_multi_mount_protect()
392 	brelse(bh);  in ext4_multi_mount_protect()