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Message-ID: <056a7276-c6f0-cd7e-9e46-1d8507a0b6b1@wanadoo.fr>
Date: Wed, 9 Feb 2022 21:01:35 +0100
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: patchwork-bot+netdevbpf@...nel.org, Qing Wang <wangqing@...o.com>
Cc: dchickles@...vell.com, sburla@...vell.com, fmanlunas@...vell.com,
davem@...emloft.net, kuba@...nel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: ethernet: cavium: use div64_u64() instead of
do_div()
Le 09/02/2022 à 14:30, patchwork-bot+netdevbpf@...nel.org a écrit :
> Hello:
>
> This patch was applied to netdev/net-next.git (master)
> by David S. Miller <davem@...emloft.net>:
>
> On Wed, 9 Feb 2022 00:39:19 -0800 you wrote:
>> From: Wang Qing <wangqing@...o.com>
>>
>> do_div() does a 64-by-32 division.
>> When the divisor is u64, do_div() truncates it to 32 bits, this means it
>> can test non-zero and be truncated to zero for division.
>>
>> fix do_div.cocci warning:
>> do_div() does a 64-by-32 division, please consider using div64_u64 instead.
>>
>> [...]
>
> Here is the summary with links:
> - net: ethernet: cavium: use div64_u64() instead of do_div()
> https://git.kernel.org/netdev/net-next/c/038fcdaf0470
>
> You are awesome, thank you!
Hi,
I think that this patch should be reverted because do_div() and
div64_u64() don't have the same calling convention.
See [1]
[1]:
https://lore.kernel.org/linux-kernel/20211117112559.jix3hmx7uwqmuryg@pengutronix.de/
CJ
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