linux-kernel - [tip:x86/extable] x86, extable: Use .pushsection ... . popsection for _ASM

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Date:	Fri, 20 Apr 2012 14:55:31 -0700
From:	"tip-bot for H. Peter Anvin" <hpa@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	david.daney@...ium.com, tglx@...utronix.de
Subject: [tip:x86/extable] x86, extable: Use .pushsection ... .
 popsection for _ASM_EXTABLE()

Commit-ID:  d4541805e812abb5110d5de83246488fa0aa9a8e
Gitweb:     http://git.kernel.org/tip/d4541805e812abb5110d5de83246488fa0aa9a8e
Author:     H. Peter Anvin <hpa@...or.com>
AuthorDate: Fri, 20 Apr 2012 12:12:27 -0700
Committer:  H. Peter Anvin <hpa@...or.com>
CommitDate: Fri, 20 Apr 2012 13:51:38 -0700

x86, extable: Use .pushsection ... .popsection for _ASM_EXTABLE()

Instead of using .section ... .previous, use .pushsection
... .popsection; this is (hopefully) a bit more robust, especially in
complex assembly code.

Signed-off-by: H. Peter Anvin <hpa@...or.com>
Cc: David Daney <david.daney@...ium.com>
Link: http://lkml.kernel.org/r/CA%2B55aFyijf43qSu3N9nWHEBwaGbb7T2Oq9A=9EyR=Jtyqfq_cQ@mail.gmail.com
---
 arch/x86/include/asm/asm.h |   20 ++++++++++----------
 1 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h
index 9412d65..ff3f6bf 100644
--- a/arch/x86/include/asm/asm.h
+++ b/arch/x86/include/asm/asm.h
@@ -42,17 +42,17 @@
 
 /* Exception table entry */
 #ifdef __ASSEMBLY__
-# define _ASM_EXTABLE(from,to)	    \
-	__ASM_EX_SEC ;		    \
-	_ASM_ALIGN ;		    \
-	_ASM_PTR from , to ;	    \
-	.previous
+# define _ASM_EXTABLE(from,to)			\
+	.pushsection "__ex_table","a" ;		\
+	_ASM_ALIGN ;				\
+	_ASM_PTR from , to ;			\
+	.popsection
 #else
-# define _ASM_EXTABLE(from,to) \
-	__ASM_EX_SEC	\
-	_ASM_ALIGN "\n" \
-	_ASM_PTR #from "," #to "\n" \
-	" .previous\n"
+# define _ASM_EXTABLE(from,to)			\
+	" .pushsection \"__ex_table\",\"a\"\n"	\
+	_ASM_ALIGN "\n" 			\
+	_ASM_PTR #from "," #to "\n" 		\
+	" .popsection\n"
 #endif
 
 #endif /* _ASM_X86_ASM_H */
--
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