linux-kernel - Re: [PATCH 02/21] perf pmu: Add const to pmu_events

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Date:   Fri, 8 Oct 2021 12:01:38 +0100
From:   John Garry <john.garry@...wei.com>
To:     Ian Rogers <irogers@...gle.com>, Andi Kleen <ak@...ux.intel.com>,
        "Jiri Olsa" <jolsa@...hat.com>, Jin Yao <yao.jin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Kajol Jain <kjain@...ux.ibm.com>,
        "Paul A . Clarke" <pc@...ibm.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Riccardo Mancini <rickyman7@...il.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Kees Cook <keescook@...omium.org>,
        "Sami Tolvanen" <samitolvanen@...gle.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Jacob Keller" <jacob.e.keller@...el.com>,
        Zhen Lei <thunder.leizhen@...wei.com>,
        ToastC <mrtoastcheng@...il.com>,
        Joakim Zhang <qiangqing.zhang@....com>,
        Felix Fietkau <nbd@....name>,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
        Song Liu <songliubraving@...com>,
        "Fabian Hemmer" <copy@...y.sh>,
        Alexander Antonov <alexander.antonov@...ux.intel.com>,
        Nicholas Fraser <nfraser@...eweavers.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Denys Zagorui <dzagorui@...co.com>,
        Wan Jiabing <wanjiabing@...o.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        "Sumanth Korikkar" <sumanthk@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Changbin Du <changbin.du@...el.com>,
        <linux-kernel@...r.kernel.org>, <linux-perf-users@...r.kernel.org>
CC:     Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 02/21] perf pmu: Add const to pmu_events_map.

On 07/10/2021 17:56, Ian Rogers wrote:
> The pmu_events_map is generated at compile time and used for lookup. For
> testing purposes we need to swap the map being used. Having the
> pmu_events_map be non-const is misleading as it may be an out argument.
> Make it const and update uses so they work on const too.
> 
> Signed-off-by: Ian Rogers<irogers@...gle.com>

Reviewed-by: John Garry <john.garry@...wei.com>