linux-kernel - Re: [PATCH 1/2] perf arm64: Handle __NR3264

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Message-ID: <CALZQ+UN0y29mJUypfSUHCLkMHzBVQTVU0i95MtHG3U+VzS+5Og@mail.gmail.com>
Date:   Sat, 27 May 2023 09:43:55 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Tiezhu Yang <yangtiezhu@...ngson.cn>
Cc:     Alexander Kapshuk <alexander.kapshuk@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Hans-Peter Nilsson <hp@...s.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        loongarch@...ts.linux.dev, loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH 1/2] perf arm64: Handle __NR3264_ prefixed syscall number

On Wed, May 24, 2023 at 03:18:28PM +0800, Tiezhu Yang wrote:
> On 05/24/2023 02:43 PM, Alexander Kapshuk wrote:

[...]

> Yes, there are only 2 patterns such as "__NR_" and "__NR3264_",
> I confirmed that in include/uapi/asm-generic/unistd.h.
>
> > routines, they may be combined into a single sub routine like so:
> > awk '$2 ~ "__NR" && $3 !~ "__NR3264_" {
> >         sub("^#define __NR(3264)?_", "")
> >         print | "sort -k2 -n"
> > }'

Thanks for improving this, Tiezhu and Alexander.

The format between '[46]' and '[__NR3264_ftruncate]' has changed back
and forth for several times due to various reasons ;)

Above change is a good improvement for me and I tested at my side
with below commands:

  $ aarch64-linux-gnu-gcc -E -dM -x c -I tools/include/uapi/ \
    tools/include/uapi/asm-generic/unistd.h \
    | awk '$2 ~ "__NR" && $3 !~ "__NR3264_" { sub("^#define
__NR(3264)?_", ""); print | "sort -k2 -n"}'

The result looks good to me.  You are welcome to add my review tag:

Reviewed-by: Leo Yan <leo.yan@...aro.org>