> +static int ioctl_snapshot_wait_event(unsigned long arg)
> +{
> + int ret = 0;
> + struct blk_snap_snapshot_event *karg;
> + struct event *event;
> +
> + //pr_debug("Wait event\n");
please avoid avove comment style and remove debug statements.
> + karg = kzalloc(sizeof(struct blk_snap_snapshot_event), GFP_KERNEL);
> + if (!karg)
> + return -ENOMEM;
-ck
