linux-kernel - [PATCH v2 15/15] x86: Use macros for .data.page

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Date:	Tue, 28 Apr 2009 13:01:02 -0400
From:	Tim Abbott <tabbott@....EDU>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Anders Kaseorg <andersk@....edu>,
	Waseem Daher <wdaher@....edu>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Jeff Arnold <jbarnold@....edu>,
	Paul Mundt <lethal@...ux-sh.org>,
	David Howells <dhowells@...hat.com>,
	Tim Abbott <tabbott@....edu>, Ingo Molnar <mingo@...hat.com>
Subject: [PATCH v2 15/15] x86: Use macros for .data.page_aligned.

.data.page_aligned should not need a separate output section.  So, as
part of this cleanup I moved it into the .data output section in the
linker scripts in order to eliminate unnecessary references to the
section name.

Signed-off-by: Tim Abbott <tabbott@....edu>
Cc: Ingo Molnar <mingo@...hat.com>
---
 arch/x86/kernel/head_32.S        |    2 +-
 arch/x86/kernel/vmlinux_32.lds.S |    6 +-----
 arch/x86/kernel/vmlinux_64.lds.S |    6 +-----
 3 files changed, 3 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index 8f2a18b..f2a44f3 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -636,7 +636,7 @@ ENTRY(empty_zero_page)
  * This starts the data section.
  */
 #ifdef CONFIG_X86_PAE
-.section ".data.page_aligned","wa"
+__PAGE_ALIGNED_DATA
 	/* Page-aligned for the benefit of paravirt? */
 	.align PAGE_SIZE_asm
 ENTRY(swapper_pg_dir)
diff --git a/arch/x86/kernel/vmlinux_32.lds.S b/arch/x86/kernel/vmlinux_32.lds.S
index fdb0642..57cbcf2 100644
--- a/arch/x86/kernel/vmlinux_32.lds.S
+++ b/arch/x86/kernel/vmlinux_32.lds.S
@@ -64,6 +64,7 @@ SECTIONS
   /* writeable */
   . = ALIGN(PAGE_SIZE);
   .data : AT(ADDR(.data) - LOAD_OFFSET) {	/* Data */
+	PAGE_ALIGNED_DATA
 	DATA_DATA
 	CONSTRUCTORS
 	} :data
@@ -76,11 +77,6 @@ SECTIONS
   	__nosave_end = .;
   }
 
-  . = ALIGN(PAGE_SIZE);
-  .data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
-	*(.data.page_aligned)
-  }
-
   . = ALIGN(32);
   .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
 	*(.data.cacheline_aligned)
diff --git a/arch/x86/kernel/vmlinux_64.lds.S b/arch/x86/kernel/vmlinux_64.lds.S
index 424fb87..5b74dc9 100644
--- a/arch/x86/kernel/vmlinux_64.lds.S
+++ b/arch/x86/kernel/vmlinux_64.lds.S
@@ -64,6 +64,7 @@ SECTIONS
 	. = ALIGN(PAGE_SIZE);
 	/* Data */
 	.data : AT(ADDR(.data) - LOAD_OFFSET) {
+		PAGE_ALIGNED_DATA
 		DATA_DATA
 		CONSTRUCTORS
 		/* End of data section */
@@ -157,11 +158,6 @@ SECTIONS
 		*(.data.init_task)
 	} :data.init
 
-	.data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
-		. = ALIGN(PAGE_SIZE);
-		*(.data.page_aligned)
-	}
-
 	.smp_locks : AT(ADDR(.smp_locks) - LOAD_OFFSET) {
 		/* might get freed after init */
 		. = ALIGN(PAGE_SIZE);
-- 
1.6.2.1

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