From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Arnd Bergmann <arnd@arndb.de>, Alan Cox <alan@linux.intel.com>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: y2038@lists.linaro.org, linux-media@vger.kernel.org,
devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 7/8] [media] staging: atomisp: convert timestamps to ktime_t
Date: Mon, 27 Nov 2017 17:05:53 +0200 [thread overview]
Message-ID: <1511795153.25007.451.camel@linux.intel.com> (raw)
In-Reply-To: <20171127132027.1734806-7-arnd@arndb.de>
On Mon, 2017-11-27 at 14:19 +0100, Arnd Bergmann wrote:
> timespec overflows in 2038 on 32-bit architectures, and the
> getnstimeofday() suffers from possible time jumps, so the
> timestamps here are better done using ktime_get(), which has
> neither of those problems.
>
> In case of ov2680, we don't seem to use the timestamp at
> all, so I just remove it.
>
> + ktime_t timedelay = ns_to_ktime(
> min((u32)abs(dev->number_of_steps) *
> DELAY_PER_STEP_NS,
> - (u32)DELAY_MAX_PER_STEP_NS),
> - };
> + (u32)DELAY_MAX_PER_STEP_NS));
Since you are touching this, it might make sense to convert to
min_t(u32, ...)
...and locate lines something like:
ktime_t timeday = ns_to_ktime(min_t(u32,
param1,
param2));
>From my pov will make readability better.
--
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy
next prev parent reply other threads:[~2017-11-27 15:11 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-27 13:19 [PATCH 1/8] [media] uvc_video: use ktime_t for stats Arnd Bergmann
2017-11-27 13:19 ` [PATCH 2/8] [media] uvc_video: use ktime_t for timestamps Arnd Bergmann
2017-12-05 0:37 ` Laurent Pinchart
2017-12-05 0:58 ` Laurent Pinchart
2017-12-05 11:27 ` Arnd Bergmann
2017-11-27 13:19 ` [PATCH 3/8] [media] solo6x10: use ktime_get_ts64() for time sync Arnd Bergmann
2017-11-27 20:45 ` Ismael Luceno
2017-11-27 13:19 ` [PATCH 4/8] [media] staging: bcm2835-camera use ktime_t for timestamps Arnd Bergmann
2017-11-27 13:19 ` Arnd Bergmann
2017-11-27 13:19 ` [PATCH 5/8] [media] omap3isp: support 64-bit version of omap3isp_stat_data Arnd Bergmann
2017-12-05 0:41 ` Laurent Pinchart
2018-01-16 17:10 ` Arnd Bergmann
2017-11-27 13:19 ` [PATCH 6/8] [media] vivid: use ktime_t for timestamp calculation Arnd Bergmann
2017-11-27 15:14 ` Hans Verkuil
2017-11-27 15:25 ` Arnd Bergmann
2017-11-27 13:19 ` [PATCH 7/8] [media] staging: atomisp: convert timestamps to ktime_t Arnd Bergmann
2017-11-27 15:05 ` Andy Shevchenko [this message]
2017-11-27 15:20 ` [Y2038] " Arnd Bergmann
2017-11-27 13:20 ` [PATCH 8/8] [media] staging: imx: use ktime_t for timestamps Arnd Bergmann
2017-12-01 23:55 ` Steve Longerbeam
2017-12-05 0:40 ` [PATCH 1/8] [media] uvc_video: use ktime_t for stats Laurent Pinchart
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