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Date:   Fri, 22 Mar 2019 00:47:11 +0000
From:   Solomon Tan <solomonbstoner@...tonmail.ch>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:     "peterz@...radead.org" <peterz@...radead.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "acme@...nel.org" <acme@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "suzuki.poulose@....com" <suzuki.poulose@....com>,
        "alexander.shishkin@...ux.intel.com" 
        <alexander.shishkin@...ux.intel.com>,
        "jolsa@...hat.com" <jolsa@...hat.com>,
        "namhyung@...nel.org" <namhyung@...nel.org>,
        "robert.walker@....com" <robert.walker@....com>,
        "acme@...hat.com" <acme@...hat.com>
Subject: Re: [PATCH v4] perf tools: Add missing case value


‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Friday, March 22, 2019 12:27 AM, Mathieu Poirier <mathieu.poirier@...aro.org> wrote:

> On Thu, Mar 21, 2019 at 01:29:11AM +0000, Solomon Tan wrote:
>
> > The following error was thrown when compiling `tools/perf` using OpenCSD
> > v0.11.1. This patch fixes said error.
> >
> >       CC       util/intel-pt-decoder/intel-pt-log.o
> >       CC       util/cs-etm-decoder/cs-etm-decoder.o
> >     util/cs-etm-decoder/cs-etm-decoder.c: In function
> >     ‘cs_etm_decoder__buffer_range’:
> >     util/cs-etm-decoder/cs-etm-decoder.c:370:2: error: enumeration value ‘OCSD_INSTR_WFI_WFE’ not handled in switch [-Werror=switch-enum]
> >       switch (elem->last_i_type) {
> >       ^~~~~~
> >       CC       util/intel-pt-decoder/intel-pt-decoder.o
> >     cc1: all warnings being treated as errors
> >
> >
> > Because `OCSD_INSTR_WFI_WFE` case was added only in v0.11.0, the minimum
> > required OpenCSD library version for this patch is no longer v0.10.0.
> >
> > Signed-off-by: Solomon Tan solomonbstoner@...tonmail.ch
> >
> > --------------------------------------------------------
> >
> > tools/build/feature/test-libopencsd.c | 4 ++--
> > tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 1 +
> > 2 files changed, 3 insertions(+), 2 deletions(-)
> > diff --git a/tools/build/feature/test-libopencsd.c b/tools/build/feature/test-libopencsd.c
> > index d68eb4fb40cc..2b0e02c38870 100644
> > --- a/tools/build/feature/test-libopencsd.c
> > +++ b/tools/build/feature/test-libopencsd.c
> > @@ -4,9 +4,9 @@
> > /*
> >
> > -   Check OpenCSD library version is sufficient to provide required features
> >     */
> >     -#define OCSD_MIN_VER ((0 << 16) | (10 << 8) | (0))
> >     +#define OCSD_MIN_VER ((0 << 16) | (11 << 8) | (0))
> >     #if !defined(OCSD_VER_NUM) || (OCSD_VER_NUM < OCSD_MIN_VER)
> >     -#error "OpenCSD >= 0.10.0 is required"
> >     +#error "OpenCSD >= 0.11.0 is required"
> >     #endif
> >
> >
> > int main(void)
> > diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
> > index ba4c623cd8de..39fe21e1cf93 100644
> > --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
> > +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
> > @@ -387,6 +387,7 @@ cs_etm_decoder__buffer_range(struct cs_etm_decoder *decoder,
> > break;
> > case OCSD_INSTR_ISB:
> > case OCSD_INSTR_DSB_DMB:
> >
> > -         case OCSD_INSTR_WFI_WFE:
> >           case OCSD_INSTR_OTHER:
> >           default:
> >                   packet->last_instr_taken_branch = false;
> >
> >
> >
> > --
> > 2.19.1
>
> On my side this patch is no different from V3, i.e it doesn't pass checkpatch
> and it doesn't apply on my next tree.
>
> Mathieu
>
> >
>
> pub RSA 2048/C88289A6 2018-05-09solomonbstoner@...tonmail.ch solomonbstoner@...tonmail.ch
>
> > sub RSA 2048/7C5E8D6D 2018-05-09

I created a new branch from `next` for the patch mentioned above. Should I
have made the patch directly on the `next` branch instead?

I ran the following 2 commands to test the files I edited:
```
perl scripts/checkpatch.pl -f tools/build/feature/test-libopencsd.c
perl scripts/checkpatch.pl -f tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
```
The commands reported that the files "has no obvious style problems and is ready
for submission." For your kind advice please. Thank you.

Solomon Tan

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