linux-kernel - Re: [PATCH] x86/platform/intel/quark: Explicitly include linux/io.h for virt_to

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Date:   Tue, 19 Nov 2019 14:38:51 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        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>,
        "H. Peter Anvin" <hpa@...or.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Nadav Amit <namit@...are.com>,
        "VMware, Inc." <pv-drivers@...are.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, linux-ia64@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        linux-efi <linux-efi@...r.kernel.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        ALSA Development Mailing List <alsa-devel@...a-project.org>
Subject: Re: [PATCH] x86/platform/intel/quark: Explicitly include linux/io.h
 for virt_to_phys()

On Tue, Nov 19, 2019 at 2:07 PM Ingo Molnar <mingo@...nel.org> wrote:
>
>
> * Ingo Molnar <mingo@...nel.org> wrote:
>
> > I've applied them to tip:WIP.core/headers as a work-in-progress tree,
> > and I'm testing them on randconfigs to make sure there's no broken
> > dependencies. I'll wait for the ACPI acks.
>
> One more fix was needed, for the intel-quark driver that is only built on
> 32-bit configs:
>
> ==================>
> From: Ingo Molnar <mingo@...nel.org>
> Date: Tue, 19 Nov 2019 12:51:56 +0100
> Subject: [PATCH] x86/platform/intel/quark: Explicitly include linux/io.h for virt_to_phys()
>
> Similarly to the previous patches by Sean Christopherson:
>
>  "Through a labyrinthian sequence of includes, usage of virt_to_phys() is
>   dependent on the include of asm/io.h in x86's asm/realmode.h, which is
>   included in x86's asm/acpi.h and thus by linux/acpi.h.  Explicitly
>   include linux/io.h to break the dependency on realmode.h so that a
>   future patch can remove the realmode.h include from acpi.h without
>   breaking the build."
>

LGTM,
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

> Cc: linux-kernel@...r.kernel.org
> Cc: Sean Christopherson <sean.j.christopherson@...el.com>
> Cc: Borislav Petkov <bp@...en8.de>
> Cc: Linus Torvalds <torvalds@...ux-foundation.org>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Signed-off-by: Ingo Molnar <mingo@...nel.org>
> ---
>  arch/x86/platform/intel-quark/imr.c          | 2 ++
>  arch/x86/platform/intel-quark/imr_selftest.c | 2 ++
>  2 files changed, 4 insertions(+)
>
> diff --git a/arch/x86/platform/intel-quark/imr.c b/arch/x86/platform/intel-quark/imr.c
> index 6dd25dc5f027..e9d97d52475e 100644
> --- a/arch/x86/platform/intel-quark/imr.c
> +++ b/arch/x86/platform/intel-quark/imr.c
> @@ -29,6 +29,8 @@
>  #include <asm/cpu_device_id.h>
>  #include <asm/imr.h>
>  #include <asm/iosf_mbi.h>
> +#include <asm/io.h>

A nit: perhaps put it after imr.h.

> +
>  #include <linux/debugfs.h>
>  #include <linux/init.h>
>  #include <linux/mm.h>
> diff --git a/arch/x86/platform/intel-quark/imr_selftest.c b/arch/x86/platform/intel-quark/imr_selftest.c
> index 42f879b75f9b..4307830e1b6f 100644
> --- a/arch/x86/platform/intel-quark/imr_selftest.c
> +++ b/arch/x86/platform/intel-quark/imr_selftest.c
> @@ -14,6 +14,8 @@
>  #include <asm-generic/sections.h>
>  #include <asm/cpu_device_id.h>
>  #include <asm/imr.h>
> +#include <asm/io.h>
> +
>  #include <linux/init.h>
>  #include <linux/mm.h>
>  #include <linux/types.h>
>


-- 
With Best Regards,
Andy Shevchenko