linux-kernel - Re: [PATCH] x86: pat: Do not compile stubbed functions when X86

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Message-ID: <87r1z6xxh5.fsf@nanos.tec.linutronix.de>
Date:   Fri, 07 Feb 2020 14:50:46 +0000
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Jan Kiszka <jan.kiszka@...mens.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>
Cc:     x86 <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: pat: Do not compile stubbed functions when X86_PAT is off

Jan Kiszka <jan.kiszka@...mens.com> writes:

> From: Jan Kiszka <jan.kiszka@...mens.com>
>
> Those are already provided by linux/io.h as stubs.
>
> The conflict remains invisible until someone would pull {linux,asm}/io.h
> into memtype.c.

Err. memtype.c includes asm/io.h already. So it's just the PAT=n case
which is broken.

Thanks,

        tglx