linux-kernel - Re: [PATCH 1/3] cputime_nsecs: use math64.h for nsec resolution conversion helpers

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Message-ID: <CAFTL4hwroTC6HN7WvDRpn=6y-JkX4GeFzS1nro0w3L1CGNMrnA@mail.gmail.com>
Date:	Mon, 15 Apr 2013 16:08:24 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Kevin Hilman <khilman@...aro.org>
Cc:	Russell King <rmk+kernel@....linux.org.uk>,
	linux-kernel@...r.kernel.org,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	linux-arm-kernel@...ts.infradead.org,
	linaro-kernel@...ts.linaro.org
Subject: Re: [PATCH 1/3] cputime_nsecs: use math64.h for nsec resolution
 conversion helpers

2013/4/15 Kevin Hilman <khilman@...aro.org>:
> Frederic Weisbecker <fweisbec@...il.com> writes:
>
>> On Wed, Mar 20, 2013 at 04:34:25PM -0700, Kevin Hilman wrote:
>>> For the nsec resolution conversions to be useable on non 64-bit
>>> architectures, the helpers in <linux/math64.h> need to be used so the
>>> right arch-specific 64-bit math helpers can be used (e.g. do_div())
>>>
>>> Cc: Frederic Weisbecker <fweisbec@...il.com>
>>> Signed-off-by: Kevin Hilman <khilman@...aro.org>
>>
>> Ok the patch is nice!
>>
>> I'm queuing it.
>
> Thanks, did you queue PATCH 3/3 also to remove the 64-bit limitation
> from VIRT_CPU_ACCOUNTING_GEN:  https://lkml.org/lkml/2013/3/20/656

Not yet, for this one I need to deeply check we haven't forgotten
anything concerning cputime_t operations in 32 bits archs.
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