linux-kernel - Re: [PATCH] tools/perf: Do not set a variable unless it will be used

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Message-ID: <YLn0D+1R2QHZYRVV@hirez.programming.kicks-ass.net>
Date:   Fri, 4 Jun 2021 11:36:15 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Ricardo Ribalda <ribalda@...omium.org>
Cc:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Subject: Re: [PATCH] tools/perf: Do not set a variable unless it will be used

On Fri, Jun 04, 2021 at 11:26:38AM +0200, Ricardo Ribalda wrote:
> clang-13 triggers the following warning:
> 
> bench/inject-buildid.c:351:6: error: variable 'len' set but not used [-Werror,-Wunused-but-set-variable]
>         u64 len = 0;
> 
> This patch sets the value to len only if it will be used afterwards.

My vote would be to kill that warning, what absolute shite.