linux-kernel - Re: [PATCH 07/25] mm/csky: Use mm_fault

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Date:   Thu, 18 Jun 2020 15:59:44 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Peter Xu <peterx@...hat.com>
Cc:     Guo Ren <guoren@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Gerald Schaefer <gerald.schaefer@...ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        linux-csky@...r.kernel.org
Subject: Re: [PATCH 07/25] mm/csky: Use mm_fault_accounting()

On Thu, Jun 18, 2020 at 3:28 PM Peter Xu <peterx@...hat.com> wrote:
>
> > >         if (regs)
> > >                 perf_sw_event(event_type, 1, regs, address);
>
> Sadly, this line seems to fail the compilation:

Yeah, I should have known that. We require a constant event ID,
because it uses the magical static keys.

So never mind. The perf_sw_event() calls can't be shared for two different ID's.

           Linus