linux-kernel - Re: [PATCH] selftests: proc: remove unreached code and fix build warning

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Message-ID: <eb9b2d6e-91eb-4fdc-b352-b3d0c290da2f@p183>
Date: Fri, 7 Jun 2024 18:25:34 +0300
From: Alexey Dobriyan <adobriyan@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Amer Al Shanawany <amer.shanawany@...il.com>,
	Shuah Khan <shuah@...nel.org>,
	Swarup Laxman Kotiaklapudi <swarupkotikalapudi@...il.com>,
	Hugh Dickins <hughd@...gle.com>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-kselftest@...r.kernel.org,
	Javier Carrasco <javier.carrasco.cruz@...il.com>,
	kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] selftests: proc: remove unreached code and fix build
 warning

On Tue, Jun 04, 2024 at 08:25:31PM -0700, Andrew Morton wrote:
> On Mon, 3 Jun 2024 17:24:47 +0300 Alexey Dobriyan <adobriyan@...il.com> wrote:
> 
> > On Mon, Jun 03, 2024 at 02:42:20PM +0200, Amer Al Shanawany wrote:
> > > fix the following warning:
> > > proc-empty-vm.c:385:17: warning: ignoring return value of ‘write’
> > 
> > > --- a/tools/testing/selftests/proc/proc-empty-vm.c
> > > +++ b/tools/testing/selftests/proc/proc-empty-vm.c
> > > @@ -381,9 +381,6 @@ static int test_proc_pid_statm(pid_t pid)
> > 
> > > -	if (0) {
> > > -		write(1, buf, rv);
> > > -	}
> > 
> > no thanks
> 
> Why not?
> 
> Why does that code exist anyway?  It at least needs a comment.

OK, whatever.

If test fails, it better record buggy output somewhere (to coredump or to terminal).