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Date: Fri, 25 Apr 2008 13:56:17 -0400
From: Jeff Dike <jdike@...toit.com>
To: Andrew Morton <akpm@...l.org>, LKML <linux-kernel@...r.kernel.org>,
uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Cc: Cyrill Gorcunov <gorcunov@...il.com>
Subject: [PATCH 18/19] UML - use PAGE_SIZE in linker scripts
From: Cyrill Gorcunov <gorcunov@...il.com>
This patch includes page.h header into liker scripts that
allow us to use PAGE_SIZE macro instead of numeric constant.
To be able to include page.h into linker scripts page.h is
needed for some modification - i.e. we need to use __ASSEMBLY__
and _AC macro
[ jdike@...ux.intel.com - fixed conflict with as-layout.h ]
Signed-off-by: Cyrill Gorcunov <gorcunov@...il.com>
Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
---
arch/um/include/as-layout.h | 14 +++++++-------
arch/um/kernel/dyn.lds.S | 7 ++++---
arch/um/kernel/uml.lds.S | 7 ++++---
include/asm-um/page.h | 17 +++++++++++------
4 files changed, 26 insertions(+), 19 deletions(-)
Index: linux-2.6-git/arch/um/kernel/dyn.lds.S
===================================================================
--- linux-2.6-git.orig/arch/um/kernel/dyn.lds.S 2008-04-24 16:51:07.000000000 -0400
+++ linux-2.6-git/arch/um/kernel/dyn.lds.S 2008-04-24 17:07:28.000000000 -0400
@@ -1,4 +1,5 @@
#include <asm-generic/vmlinux.lds.h>
+#include <asm/page.h>
OUTPUT_FORMAT(ELF_FORMAT)
OUTPUT_ARCH(ELF_ARCH)
@@ -21,7 +22,7 @@ SECTIONS
_einittext = .;
}
- . = ALIGN(4096);
+ . = ALIGN(PAGE_SIZE);
/* Read-only sections, merged into text segment: */
.hash : { *(.hash) }
@@ -68,9 +69,9 @@ SECTIONS
/* .gnu.warning sections are handled specially by elf32.em. */
*(.gnu.warning)
- . = ALIGN(4096);
+ . = ALIGN(PAGE_SIZE);
} =0x90909090
- . = ALIGN(4096);
+ . = ALIGN(PAGE_SIZE);
.syscall_stub : {
__syscall_stub_start = .;
*(.__syscall_stub*)
Index: linux-2.6-git/arch/um/kernel/uml.lds.S
===================================================================
--- linux-2.6-git.orig/arch/um/kernel/uml.lds.S 2008-04-24 16:51:07.000000000 -0400
+++ linux-2.6-git/arch/um/kernel/uml.lds.S 2008-04-24 17:07:28.000000000 -0400
@@ -1,4 +1,5 @@
#include <asm-generic/vmlinux.lds.h>
+#include <asm/page.h>
OUTPUT_FORMAT(ELF_FORMAT)
OUTPUT_ARCH(ELF_ARCH)
@@ -26,7 +27,7 @@ SECTIONS
INIT_TEXT
_einittext = .;
}
- . = ALIGN(4096);
+ . = ALIGN(PAGE_SIZE);
.text :
{
@@ -39,7 +40,7 @@ SECTIONS
*(.gnu.linkonce.t*)
}
- . = ALIGN(4096);
+ . = ALIGN(PAGE_SIZE);
.syscall_stub : {
__syscall_stub_start = .;
*(.__syscall_stub*)
@@ -79,7 +80,7 @@ SECTIONS
.sdata : { *(.sdata) }
_edata = .;
PROVIDE (edata = .);
- . = ALIGN(0x1000);
+ . = ALIGN(PAGE_SIZE);
.sbss :
{
__bss_start = .;
Index: linux-2.6-git/include/asm-um/page.h
===================================================================
--- linux-2.6-git.orig/include/asm-um/page.h 2008-04-24 16:51:07.000000000 -0400
+++ linux-2.6-git/include/asm-um/page.h 2008-04-24 17:07:28.000000000 -0400
@@ -7,16 +7,20 @@
#ifndef __UM_PAGE_H
#define __UM_PAGE_H
-struct page;
-
-#include <linux/types.h>
-#include <asm/vm-flags.h>
+#include <linux/const.h>
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 12
-#define PAGE_SIZE (1UL << PAGE_SHIFT)
+#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
+#ifndef __ASSEMBLY__
+
+struct page;
+
+#include <linux/types.h>
+#include <asm/vm-flags.h>
+
/*
* These are used to make use of C type-checking..
*/
@@ -120,4 +124,5 @@ extern struct page *arch_validate(struct
#include <asm-generic/memory_model.h>
#include <asm-generic/page.h>
-#endif
+#endif /* __ASSEMBLY__ */
+#endif /* __UM_PAGE_H */
Index: linux-2.6-git/arch/um/include/as-layout.h
===================================================================
--- linux-2.6-git.orig/arch/um/include/as-layout.h 2008-04-24 16:51:07.000000000 -0400
+++ linux-2.6-git/arch/um/include/as-layout.h 2008-04-24 17:08:16.000000000 -0400
@@ -23,16 +23,16 @@
*/
#ifdef __ASSEMBLY__
-#define _AC(X, Y) (Y)
+#define _UML_AC(X, Y) (Y)
#else
-#define __AC(X, Y) (X (Y))
-#define _AC(X, Y) __AC(X, Y)
+#define __UML_AC(X, Y) (X(Y))
+#define _UML_AC(X, Y) __UML_AC(X, Y)
#endif
-#define STUB_START _AC(, 0x100000)
-#define STUB_CODE _AC((unsigned long), STUB_START)
-#define STUB_DATA _AC((unsigned long), STUB_CODE + UM_KERN_PAGE_SIZE)
-#define STUB_END _AC((unsigned long), STUB_DATA + UM_KERN_PAGE_SIZE)
+#define STUB_START _UML_AC(, 0x100000)
+#define STUB_CODE _UML_AC((unsigned long), STUB_START)
+#define STUB_DATA _UML_AC((unsigned long), STUB_CODE + UM_KERN_PAGE_SIZE)
+#define STUB_END _UML_AC((unsigned long), STUB_DATA + UM_KERN_PAGE_SIZE)
#ifndef __ASSEMBLY__
--
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