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Message-ID: <20220311092916.00005266@tom.com>
Date:   Fri, 11 Mar 2022 09:29:16 +0800
From:   Mingbao Sun <sunmingbao@....com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        "David S . Miller" <davem@...emloft.net>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
        tyler.sun@...l.com, ping.gan@...l.com, yanxiu.cai@...l.com,
        libin.zhang@...l.com, ao.sun@...l.com
Subject: Re: [PATCH] tcp: export symbol tcp_set_congestion_control

On Thu, 10 Mar 2022 12:48:25 -0800
Jakub Kicinski <kuba@...nel.org> wrote:

> On Thu, 10 Mar 2022 21:48:30 +0800 Mingbao Sun wrote:
> > Since the kernel API 'kernel_setsockopt' was removed, and since the
> > function ‘tcp_set_congestion_control’ is just the real underlying guy
> > handling this job, so it makes sense to get it exported.  
> 
> Do you happen to have a reference to the commit which removed
> kernel_setsockopt and the justification?  My knee jerk reaction
> would the that's a better path than allowing in-kernel socket users 
> to poke at internal functions even if that works as of today.

FYI
(Sorry for putting URLs in the mail):

kernel_setsockopt disappeared from kernel v5.8,
and all the relevant users have switched to
dedicated small functions.

The mail thread:
https://lists.archive.carbon60.com/linux/kernel/3712394

The commit:
https://github.com/torvalds/linux/commit/5a892ff2facb4548c17c05931ed899038a0da63e

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