* freeze_bdev -- lock a filesystem and force it into a consistent state
* @bdev: blockdevice to lock
*
- * This takes the block device bd_mount_sem to make sure no new mounts
+ * This takes the block device bd_mount_mutex to make sure no new mounts
* happen on bdev until thaw_bdev() is called.
* If a superblock is found on this device, we take the s_umount semaphore
* on it to make sure nobody unmounts until the snapshot creation is done.
{
struct super_block *sb;
- down(&bdev->bd_mount_sem);
+ mutex_lock(&bdev->bd_mount_mutex);
sb = get_super(bdev);
if (sb && !(sb->s_flags & MS_RDONLY)) {
sb->s_frozen = SB_FREEZE_WRITE;
drop_super(sb);
}
- up(&bdev->bd_mount_sem);
+ mutex_unlock(&bdev->bd_mount_mutex);
}
EXPORT_SYMBOL(thaw_bdev);
bh->b_state = 0;
atomic_set(&bh->b_count, 0);
+ bh->b_private = NULL;
bh->b_size = size;
/* Link the buffer to its page */
else if (test_set_buffer_locked(bh))
continue;
- get_bh(bh);
if (rw == WRITE || rw == SWRITE) {
if (test_clear_buffer_dirty(bh)) {
bh->b_end_io = end_buffer_write_sync;
+ get_bh(bh);
submit_bh(WRITE, bh);
continue;
}
} else {
if (!buffer_uptodate(bh)) {
bh->b_end_io = end_buffer_read_sync;
+ get_bh(bh);
submit_bh(rw, bh);
continue;
}
}
unlock_buffer(bh);
- put_bh(bh);
}
}