linux-kernel - Re: [PATCH] MIPS: perf events: handle switch statement falling through warnings

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Message-ID: <MWHPR2201MB12777D68602F497F2CE464D9C1CF0@MWHPR2201MB1277.namprd22.prod.outlook.com>
Date:   Mon, 15 Jul 2019 11:22:53 +0000
From:   Paul Burton <paul.burton@...s.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
CC:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <pburton@...ecomp.com>,
        James Hogan <jhogan@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Kees Cook <keescook@...omium.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>,
        "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>
Subject: Re: [PATCH] MIPS: perf events: handle switch statement falling
 through  warnings

Hello,

Stephen Rothwell wrote:
> Now that we build with -Wimplicit-fallthrough=3, some warnings are
> produced in the arch/mips perf events code that are promoted to errors:
> 
> arch/mips/kernel/perf_event_mipsxx.c:792:3: error: this statement may fall through [-Werror=implicit-fallthrough=]
> arch/mips/kernel/perf_event_mipsxx.c:795:3: error: this statement may fall through [-Werror=implicit-fallthrough=]
> arch/mips/kernel/perf_event_mipsxx.c:798:3: error: this statement may fall through [-Werror=implicit-fallthrough=]
> arch/mips/kernel/perf_event_mipsxx.c:1407:6: error: this statement may fall through [-Werror=implicit-fallthrough=]
> 
> Assume the fall throughs are deliberate amd annotate/eliminate them.
> 
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
> Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
> Cc: Jiri Olsa <jolsa@...hat.com>
> Cc: Namhyung Kim <namhyung@...nel.org>
> Cc: Gustavo A. R. Silva <gustavo@...eddedor.com>
> Cc: Kees Cook <keescook@...omium.org>
> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>

Applied (with some tweaks) to mips-next.

Thanks,
    Paul

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