linux-kernel - [PATCH] x86/platform/uv: Include clocksource.h for clocksource_touch

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Date:	Fri, 11 Dec 2015 09:06:23 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Andy Lutomirski <luto@...nel.org>
Cc:	x86@...nel.org, Marcelo Tosatti <mtosatti@...hat.com>,
	Radim Krcmar <rkrcmar@...hat.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	Alexander Graf <agraf@...e.de>
Subject: [PATCH] x86/platform/uv: Include clocksource.h for
 clocksource_touch_watchdog()


* Andy Lutomirski <luto@...nel.org> wrote:

> diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h
> index f80d70009ff8..6d7d0e52ed5a 100644
> --- a/arch/x86/include/asm/fixmap.h
> +++ b/arch/x86/include/asm/fixmap.h
> @@ -19,7 +19,6 @@
>  #include <asm/acpi.h>
>  #include <asm/apicdef.h>
>  #include <asm/page.h>
> -#include <asm/pvclock.h>
>  #ifdef CONFIG_X86_32
>  #include <linux/threads.h>
>  #include <asm/kmap_types.h>

So this change triggered a build failure on 64-bit allmodconfig - fixed via the 
patch below. Your change unearthed a latent bug, a missing header inclusion.

Thanks,

	Ingo

============>
>From d51953b0873358d13b189996e6976dfa12a9b59d Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@...nel.org>
Date: Fri, 11 Dec 2015 09:01:30 +0100
Subject: [PATCH] x86/platform/uv: Include clocksource.h for clocksource_touch_watchdog()

This build failure triggers on 64-bit allmodconfig:

  arch/x86/platform/uv/uv_nmi.c:493:2: error: implicit declaration of function ‘clocksource_touch_watchdog’ [-Werror=implicit-function-declaration]

which is caused by recent changes exposing a missing clocksource.h include
in uv_nmi.c:

  cc1e24fdb064 x86/vdso: Remove pvclock fixmap machinery

this file got clocksource.h indirectly via fixmap.h - that stealth route
of header inclusion is now gone.

Cc: Borislav Petkov <bp@...en8.de>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/platform/uv/uv_nmi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/platform/uv/uv_nmi.c b/arch/x86/platform/uv/uv_nmi.c
index 327f21c3bde1..8dd80050d705 100644
--- a/arch/x86/platform/uv/uv_nmi.c
+++ b/arch/x86/platform/uv/uv_nmi.c
@@ -28,6 +28,7 @@
 #include <linux/nmi.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/clocksource.h>
 
 #include <asm/apic.h>
 #include <asm/current.h>

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