linux-kernel - Re: [PATCH -next] tracing: Remove set but not used variable 'ret'

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Date:   Tue, 15 Jun 2021 11:39:25 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     "libaokun (A)" <libaokun1@...wei.com>
Cc:     <mingo@...hat.com>, <linux-kernel@...r.kernel.org>,
        <weiyongjun1@...wei.com>, <yuehaibing@...wei.com>,
        <yangjihong1@...wei.com>, <yukuai3@...wei.com>
Subject: Re: [PATCH -next] tracing: Remove set but not used variable 'ret'

On Tue, 15 Jun 2021 09:59:10 +0800
"libaokun (A)" <libaokun1@...wei.com> wrote:

> ping
> 
> 在 2021/5/27 17:10, Baokun Li 写道:
> > Fixes gcc '-Wunused-but-set-variable' warning:
> >
> > kernel/trace/trace_events_hist.c: In function 'unregister_field_var_hists':
> > kernel/trace/trace_events_hist.c:5228:6: warning:
> >   variable ‘ret’ set but not used [-Wunused-but-set-variable]
> >
> > It never used since introduction.

Which was a bug.

> >
> > Signed-off-by: Baokun Li <libaokun1@...wei.com>
> 

This was fixed differently:

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=6c610dba6e2beb1a16ac309672181d0090fb8d30

-- Steve