linux-kernel - [PATCH v3 6/9] x86: move 32-bit vDSO padding from .data to .rodata

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Date:	Tue, 16 Jun 2009 14:55:26 +0200
From:	Petr Tesarik <ptesarik@...e.cz>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Andi Kleen <andi@...stfloor.org>,
	Roland McGrath <roland@...hat.com>,
	Petr Tesarik <ptesarik@...e.cz>
Subject: [PATCH v3 6/9] x86: move 32-bit vDSO padding from .data to .rodata

The padding is read-only after all, so there is no reason to put it
into a writable section.

Signed-off-by: Petr Tesarik <ptesarik@...e.cz>
---
 arch/x86/vdso/vdso32/int80.S   |    2 +-
 arch/x86/vdso/vdso32/syscall.S |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/vdso/vdso32/int80.S b/arch/x86/vdso/vdso32/int80.S
index b15b7c0..3f8c174 100644
--- a/arch/x86/vdso/vdso32/int80.S
+++ b/arch/x86/vdso/vdso32/int80.S
@@ -51,6 +51,6 @@ __kernel_vsyscall:
 	 * Pad out the segment to match the size of the sysenter.S version.
 	 */
 VDSO32_vsyscall_eh_frame_size = 0x40
-	.section .data,"aw",@progbits
+	.section .rodata,"a",@progbits
 	.space VDSO32_vsyscall_eh_frame_size-(.LENDFDEDLSI-.LSTARTFRAMEDLSI), 0
 	.previous
diff --git a/arch/x86/vdso/vdso32/syscall.S b/arch/x86/vdso/vdso32/syscall.S
index 5415b56..7def1fe 100644
--- a/arch/x86/vdso/vdso32/syscall.S
+++ b/arch/x86/vdso/vdso32/syscall.S
@@ -72,6 +72,6 @@ __kernel_vsyscall:
 	 * Pad out the segment to match the size of the sysenter.S version.
 	 */
 VDSO32_vsyscall_eh_frame_size = 0x40
-	.section .data,"aw",@progbits
+	.section .rodata,"a",@progbits
 	.space VDSO32_vsyscall_eh_frame_size-(.LENDFDE1-.LSTARTFRAME), 0
 	.previous
-- 
1.6.0.2

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