linux-kernel - Re: [PATCH] net: hamradio: baycom_ser_fdx: Replace timeval with timespec64

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Date:	Thu, 11 Feb 2016 09:55:34 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	amitoj1606@...il.com
Cc:	t.sailer@...mni.ethz.ch, linux-hams@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	y2038@...ts.linaro.org
Subject: Re: [PATCH] net: hamradio: baycom_ser_fdx: Replace timeval with
 timespec64

From: Amitoj Kaur Chawla <amitoj1606@...il.com>
Date: Wed, 10 Feb 2016 10:08:54 +0530

> 32 bit systems using 'struct timeval' will break in the year 2038, so
> we replace the code appropriately. However, this driver is not broken
> in 2038 since we are only using microseconds portion of the time.
> 
> This patch replaces 'struct timeval' with 'struct timespec64'. We only
> need to find elapsed microseconds rather than absolute time, so it's
> better to use monotonic time, so using ktime_get_ts64() makes the code
> more efficient and more robust against concurrent settimeofday()
> calls.
> 
> Signed-off-by: Amitoj Kaur Chawla <amitoj1606@...il.com>
> Reviewed-by: Arnd Bergmann <arnd@...db.de>

Applied.