linux-kernel - Re: [PATCH 4/8] perf/hw_breakpoint: Make hw_breakpoint

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Date:   Thu, 9 Jun 2022 15:25:08 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     Marco Elver <elver@...gle.com>,
        Frederic Weisbecker <frederic@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-perf-users@...r.kernel.org, x86@...nel.org,
        linux-sh@...r.kernel.org, kasan-dev@...glegroups.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/8] perf/hw_breakpoint: Make hw_breakpoint_weight()
 inlinable

On Thu, Jun 09, 2022 at 02:03:12PM +0200, Dmitry Vyukov wrote:

> > -__weak int hw_breakpoint_weight(struct perf_event *bp)
> 
> Humm... this was added in 2010 and never actually used to return
> anything other than 1 since then (?). Looks like over-design. Maybe we
> drop "#ifndef" and add a comment instead?

Frederic, you have any recollection what this was supposed to go do?