Re: [PATCH] scsi: debug: remove jiffies_to_timespec

[Douglas Gilbert]

On 2017-11-27 12:36 PM, Arnd Bergmann wrote:
> There is no need to go through an intermediate timespec to convert
> to ktime_t when we just want a simple multiplication. This gets
> rid of one of the few users of jiffies_to_timespec, which I
> hope to remove as part of the y2038 cleanup.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Acked-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>

> ---
>   drivers/scsi/scsi_debug.c | 5 +----
>   1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
> index e4f037f0f38b..df7e9db44d44 100644
> --- a/drivers/scsi/scsi_debug.c
> +++ b/drivers/scsi/scsi_debug.c
> @@ -4085,10 +4085,7 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
>   		ktime_t kt;
>   
>   		if (delta_jiff > 0) {
> -			struct timespec ts;
> -
> -			jiffies_to_timespec(delta_jiff, &ts);
> -			kt = ktime_set(ts.tv_sec, ts.tv_nsec);
> +			kt = ns_to_ktime((u64)delta_jiff * (NSEC_PER_SEC / HZ));
>   		} else
>   			kt = sdebug_ndelay;
>   		if (NULL == sd_dp) {