linux-kernel - Re: [PATCH] ide: pdc202xxx_new: Remove do_gettimeofday() usage for ktime

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Message-ID: <5501D7E7.6040603@cogentembedded.com>
Date:	Thu, 12 Mar 2015 21:16:07 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	John Stultz <john.stultz@...aro.org>,
	lkml <linux-kernel@...r.kernel.org>
CC:	"David S. Miller" <davem@...emloft.net>,
	Arnd Bergmann <arnd@...db.de>, linux-ide@...r.kernel.org
Subject: Re: [PATCH] ide: pdc202xxx_new: Remove do_gettimeofday() usage for
 ktime_get

Hello.

On 03/12/2015 08:23 PM, John Stultz wrote:

> As part of the y2038 cleanups, this patch removes the do_gettimeofday
> usage replacing it with ktime_get.

> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: linux-ide@...r.kernel.org
> Signed-off-by: John Stultz <john.stultz@...aro.org>
> ---
>   drivers/ide/pdc202xx_new.c | 10 +++++-----
>   1 file changed, 5 insertions(+), 5 deletions(-)

> diff --git a/drivers/ide/pdc202xx_new.c b/drivers/ide/pdc202xx_new.c
> index df73cbd..94bd05f 100644
> --- a/drivers/ide/pdc202xx_new.c
> +++ b/drivers/ide/pdc202xx_new.c
[...]
> @@ -273,8 +274,7 @@ static long detect_pll_input_clock(unsigned long dma_base)
>   	 * Calculate the input clock in Hz
>   	 * (the clock counter is 30 bit wide and counts down)
>   	 */
> -	usec_elapsed = (end_time.tv_sec - start_time.tv_sec) * 1000000 +
> -		(end_time.tv_usec - start_time.tv_usec);
> +	usec_elapsed = (long)ktime_to_ns(ktime_sub(end_time, start_time))/1000;

    Please add spaces around / to be consistent with this file's (and general 
kernel) coding style.

>   	pll_input = ((start_count - end_count) & 0x3fffffff) / 10 *
>   		(10000000 / usec_elapsed);
>

MBR, Sergei

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