linux-kernel - [PATCH 02/11] x86: Use section .data.page_aligned for the idt

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Message-Id: <1241136098-10376-3-git-send-email-tabbott@mit.edu>
Date:	Thu, 30 Apr 2009 20:01:29 -0400
From:	Tim Abbott <tabbott@....EDU>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	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>, Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Tim Abbott <tabbott@....edu>
Subject: [PATCH 02/11] x86: Use section .data.page_aligned for the idt_table.

The .data.idt section is just squashed into the .data.page_aligned
output section by the linker script anyway, so it might as well be in
the .data.page_aligned section.

This eliminates all references to .data.idt on x86.

Signed-off-by: Tim Abbott <tabbott@....edu>
Cc: Ingo Molnar <mingo@...hat.com>
---
 arch/x86/kernel/traps.c       |    6 ++----
 arch/x86/kernel/vmlinux.lds.S |    1 -
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index a1d2883..d7affb7 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -73,11 +73,9 @@ char ignore_fpu_irq;
 
 /*
  * The IDT has to be page-aligned to simplify the Pentium
- * F0 0F bug workaround.. We have a special link segment
- * for this.
+ * F0 0F bug workaround.
  */
-gate_desc idt_table[256]
-	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
+gate_desc idt_table[256] __page_aligned_data = { { { { 0, 0 } } }, };
 #endif
 
 DECLARE_BITMAP(used_vectors, NR_VECTORS);
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 10edb97..037df73 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -131,7 +131,6 @@ SECTIONS
 	. = ALIGN(PAGE_SIZE);
 	.data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
 		*(.data.page_aligned)
-		*(.data.idt)
 	}
 
 #ifdef CONFIG_X86_32
-- 
1.6.2.1

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