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Date:	Sun, 8 Apr 2007 13:10:56 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Bernhard Kaindl <bk@...e.de>
Cc:	linux-kernel@...r.kernel.org, Pavel Machek <pavel@....cz>,
	Andi Kleen <ak@...e.de>, "Rafael J. Wysocki" <rjw@...k.pl>,
	Jan Beulich <jbeulich@...ell.com>
Subject: Re: [PATCH 2/4] Save the MTRRs of the BSP before booting an AP

On Tue, 3 Apr 2007 16:00:36 +0200 (CEST) Bernhard Kaindl <bk@...e.de> wrote:

> --- linux-2.6.20.orig/arch/i386/kernel/smpboot.c
> +++ linux-2.6.20/arch/i386/kernel/smpboot.c
> @@ -59,6 +59,7 @@
>  #include <asm/nmi.h>
>  #include <asm/pda.h>
>  #include <asm/genapic.h>
> +#include <asm/mtrr.h>
> 

This inclusion breaks `make headers_check'.

Please always at least test allmodconfig builds before releasing a
patchset.  Additional hints are in Documentation/SubmitChecklist.

+static __inline__ void mtrr_save_state (void)
+{
+	if (smp_processor_id() == 0)
+		mtrr_save_fixed_ranges(NULL);
+	else
+		smp_call_function_single(0, mtrr_save_fixed_ranges, NULL, 1, 1);
+}

- Please use inline, not __inline__

- No space before the (

- We should uninline this function

  - It is not performance critical

  - It is probably too large to be inlined anwyay

  - It uses a lot of tricky stuff which requires a lot of header files.


From: Andrew Morton <akpm@...ux-foundation.org>

Fix `make headers_check'.

Cc: Andi Kleen <ak@...e.de>
Cc: Bernhard Kaindl <bk@...e.de>
Cc: Dave Jones <davej@...emonkey.org.uk>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

 arch/i386/kernel/cpu/mtrr/main.c |   11 +++++++++++
 include/asm-i386/mtrr.h          |   12 +-----------
 include/asm-x86_64/proto.h       |   12 +-----------
 3 files changed, 13 insertions(+), 22 deletions(-)

diff -puN arch/i386/kernel/smpboot.c~mtrr-save-the-mtrrs-of-the-bsp-before-booting-an-ap-fix arch/i386/kernel/smpboot.c
diff -puN arch/x86_64/kernel/smpboot.c~mtrr-save-the-mtrrs-of-the-bsp-before-booting-an-ap-fix arch/x86_64/kernel/smpboot.c
diff -puN include/asm-i386/mtrr.h~mtrr-save-the-mtrrs-of-the-bsp-before-booting-an-ap-fix include/asm-i386/mtrr.h
--- a/include/asm-i386/mtrr.h~mtrr-save-the-mtrrs-of-the-bsp-before-booting-an-ap-fix
+++ a/include/asm-i386/mtrr.h
@@ -25,7 +25,6 @@
 
 #include <linux/ioctl.h>
 #include <linux/errno.h>
-#include <linux/smp.h>
 
 #define	MTRR_IOCTL_BASE	'M'
 
@@ -71,16 +70,7 @@ struct mtrr_gentry
 /*  The following functions are for use by other drivers  */
 # ifdef CONFIG_MTRR
 extern void mtrr_save_fixed_ranges(void *);
-/**
- * Save current fixed-range MTRR state of the BSP
- */
-static __inline__ void mtrr_save_state (void)
-{
-	if (smp_processor_id() == 0)
-		mtrr_save_fixed_ranges(NULL);
-	else
-		smp_call_function_single(0, mtrr_save_fixed_ranges, NULL, 1, 1);
-}
+extern void mtrr_save_state(void);
 extern int mtrr_add (unsigned long base, unsigned long size,
 		     unsigned int type, char increment);
 extern int mtrr_add_page (unsigned long base, unsigned long size,
diff -puN include/asm-x86_64/proto.h~mtrr-save-the-mtrrs-of-the-bsp-before-booting-an-ap-fix include/asm-x86_64/proto.h
--- a/include/asm-x86_64/proto.h~mtrr-save-the-mtrrs-of-the-bsp-before-booting-an-ap-fix
+++ a/include/asm-x86_64/proto.h
@@ -2,7 +2,6 @@
 #define _ASM_X8664_PROTO_H 1
 
 #include <asm/ldt.h>
-#include <linux/smp.h>
 
 /* misc architecture specific prototypes */
 
@@ -19,16 +18,7 @@ extern void mcheck_init(struct cpuinfo_x
 extern void mtrr_ap_init(void);
 extern void mtrr_bp_init(void);
 extern void mtrr_save_fixed_ranges(void *);
-static __inline__ void mtrr_save_state (void)
-{
-	/*
-	 * Save current fixed-range MTRR state of the BSP:
-	 */
-	if (smp_processor_id() == 0)
-		mtrr_save_fixed_ranges(NULL);
-	else
-		smp_call_function_single(0, mtrr_save_fixed_ranges, NULL, 1, 1);
-}
+extern void mtrr_save_state(void);
 #else
 #define mtrr_ap_init() do {} while (0)
 #define mtrr_bp_init() do {} while (0)
diff -puN arch/i386/kernel/cpu/mtrr/main.c~mtrr-save-the-mtrrs-of-the-bsp-before-booting-an-ap-fix arch/i386/kernel/cpu/mtrr/main.c
--- a/arch/i386/kernel/cpu/mtrr/main.c~mtrr-save-the-mtrrs-of-the-bsp-before-booting-an-ap-fix
+++ a/arch/i386/kernel/cpu/mtrr/main.c
@@ -729,6 +729,17 @@ void mtrr_ap_init(void)
 	local_irq_restore(flags);
 }
 
+/**
+ * Save current fixed-range MTRR state of the BSP
+ */
+void mtrr_save_state(void)
+{
+	if (smp_processor_id() == 0)
+		mtrr_save_fixed_ranges(NULL);
+	else
+		smp_call_function_single(0, mtrr_save_fixed_ranges, NULL, 1, 1);
+}
+
 static int __init mtrr_init_finialize(void)
 {
 	if (!mtrr_if)
_

-
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