linux-kernel - Re: [PATCH 05/10] proc: use %u for pid printing and slightly less stack

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Message-ID: <20201203200801.GA3323724@localhost.localdomain>
Date:   Thu, 3 Dec 2020 23:08:01 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     Wen Yang <wenyang@...ux.alibaba.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>,
        Xunlei Pang <xlpang@...ux.alibaba.com>,
        linux-kernel@...r.kernel.org,
        Alexander Viro <viro@....linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        stable@...r.kernel.org
Subject: Re: [PATCH 05/10] proc: use %u for pid printing and slightly less
 stack

On Fri, Dec 04, 2020 at 02:31:59AM +0800, Wen Yang wrote:
> From: Alexey Dobriyan <adobriyan@...il.com>
> 
> [ Upstream commit e3912ac37e07a13c70675cd75020694de4841c74 ]
> 
> PROC_NUMBUF is 13 which is enough for "negative int + \n + \0".
> 
> However PIDs and TGIDs are never negative and newline is not a concern,
> so use just 10 per integer.
> 
> Link: http://lkml.kernel.org/r/20171120203005.GA27743@avx2
> Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
> Cc: Alexander Viro <viro@....linux.org.uk>
> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
> Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
> Cc: <stable@...r.kernel.org> # 4.9.x

A what? How does this belong to stable?