linux-kernel - Re: [linux-safety] [PATCH] taskstats: remove unneeded dead assignment

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Date:   Tue, 10 Nov 2020 11:06:09 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Sudip Mukherjee <sudip.mukherjee@...ethink.co.uk>
Cc:     Lukas Bulwahn <lukas.bulwahn@...il.com>,
        Balbir Singh <bsingharora@...il.com>,
        Tom Rix <trix@...hat.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        clang-built-linux@...glegroups.com,
        kernel-janitors@...r.kernel.org, linux-safety@...ts.elisa.tech,
        linux-kernel@...r.kernel.org
Subject: Re: [linux-safety] [PATCH] taskstats: remove unneeded dead assignment

On Fri, Nov 06, 2020 at 12:04:53PM +0000, Sudip Mukherjee wrote:
> Hi Lukas,
> 
> On 06/11/2020 10:31, Lukas Bulwahn wrote:
> > 
> > 
> > On Fri, 6 Nov 2020, Sudip Mukherjee wrote:
> > 
> >> Hi Lukas,
> >>
> 
> <snip>
> 
> > 
> > I did not try but I bet (a beverage of your choice) that the object code
> > remains the same also for your suggested patch. Try to disprove my claim 
> > and possibly earn yourself a beverage when we meet...
> 
> Lets decide which beverage.. ;-)
> 
> Using gcc-7.2.0 for MIPS:
> 
> original:- ab81d3305d578c2568fbc73aad2f9e61  kernel/taskstats.o
> After your change:- ab81d3305d578c2568fbc73aad2f9e61  kernel/taskstats.o
> After my change:- 0acae2c8d72abd3e15bf805fccdca711  kernel/taskstats.o

I'm surprised the line numbers from the printks aren't affecting it...

I personally prefer Lukas's patch.  "rc" should be function scope...

regards,
dan carpenter