linux-kernel - Re: [PATCH] tcp_bbr: improve arithmetic division in bbr_update

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Date:   Tue, 21 Jan 2020 10:46:35 +0100 (CET)
From:   David Miller <davem@...emloft.net>
To:     wenyang@...ux.alibaba.com
Cc:     edumazet@...gle.com, kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tcp_bbr: improve arithmetic division in bbr_update_bw()

From: Wen Yang <wenyang@...ux.alibaba.com>
Date: Mon, 20 Jan 2020 18:04:56 +0800

> do_div() does a 64-by-32 division. Use div64_long() instead of it
> if the divisor is long, to avoid truncation to 32-bit.
> And as a nice side effect also cleans up the function a bit.
> 
> Signed-off-by: Wen Yang <wenyang@...ux.alibaba.com>

Applied, thank you.