Re: [PATCH] x86/mm: fix regression with huge pages on PAE

From: Borislav Petkov
Date: Tue Nov 10 2015 - 09:47:09 EST

On Tue, Nov 10, 2015 at 03:53:03PM +0200, Kirill A. Shutemov wrote:
> Oh.. pmdval_t/pudval_t is 'unsinged long' on 64 bit. But realmode code
> uses -m16 which makes 'unsigned long' 32-bit therefore truncation warning.
> These helpers not really used in realmode code.

Hrrm, yeah, that's just the nasty include hell causing it. The diff
below fixes it with my config but it'll probably need a more careful
analysis and reshuffling of includes/defines.

Certainly better to do that than accomodating realmode to not throw
warnings with ifdeffery...

diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h
index 0033e96c3f09..9011a88353de 100644
--- a/arch/x86/boot/boot.h
+++ b/arch/x86/boot/boot.h
@@ -23,7 +23,6 @@
#include <stdarg.h>
#include <linux/types.h>
#include <linux/edd.h>
-#include <asm/boot.h>
#include <asm/setup.h>
#include "bitops.h"
#include "ctype.h"
diff --git a/arch/x86/boot/video-mode.c b/arch/x86/boot/video-mode.c
index aa8a96b052e3..896077ed3381 100644
--- a/arch/x86/boot/video-mode.c
+++ b/arch/x86/boot/video-mode.c
@@ -19,6 +19,9 @@
#include "video.h"
#include "vesa.h"

+#define NORMAL_VGA 0xffff /* 80x25 mode */
+#define EXTENDED_VGA 0xfffe /* 80x50 mode */
* Common variables
diff --git a/arch/x86/boot/video.c b/arch/x86/boot/video.c
index 05111bb8d018..a839448038b6 100644
--- a/arch/x86/boot/video.c
+++ b/arch/x86/boot/video.c
@@ -17,6 +17,8 @@
#include "video.h"
#include "vesa.h"

+#define ASK_VGA 0xfffd /* ask for it at bootup */
static u16 video_segment;

static void store_cursor_position(void)
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index 48d34d28f5a6..cd0fc0cc78bc 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -1,7 +1,6 @@
#ifndef _ASM_X86_PLATFORM_H
#define _ASM_X86_PLATFORM_H

-#include <asm/pgtable_types.h>
#include <asm/bootparam.h>

struct mpc_bus;


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