linux-kernel - [tip:x86/asm] x86: shrink __ALIGN and __ALIGN

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Date:	Wed, 11 Mar 2009 13:51:25 GMT
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	gorcunov@...nvz.org, tglx@...utronix.de, gorcunov@...il.com,
	mingo@...e.hu
Subject: [tip:x86/asm] x86: shrink __ALIGN and __ALIGN_STR definitions

Commit-ID:  bb7f5f6c26d0a304fb3af92591a1dddd39b6ac61
Gitweb:     http://git.kernel.org/tip/bb7f5f6c26d0a304fb3af92591a1dddd39b6ac61
Author:     "Cyrill Gorcunov" <gorcunov@...il.com>
AuthorDate: Mon, 9 Mar 2009 20:19:51 +0300
Commit:     Ingo Molnar <mingo@...e.hu>
CommitDate: Wed, 11 Mar 2009 12:39:28 +0100

x86: shrink __ALIGN and __ALIGN_STR definitions

Impact: cleanup

1) .p2align 4 and .align 16 are the same meaning
   (until a.out format for i386 is used which is
    not our case for CONFIG_X86_ALIGNMENT_16 anyway)

2) having 15 as max allowed bytes to be skipped
   does not make sense on modulo 16

Signed-off-by: Cyrill Gorcunov <gorcunov@...nvz.org>
LKML-Reference: <20090309171951.GE9945@...alhost>
[ small cleanup, use __stringify(), etc. ]
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 arch/x86/include/asm/linkage.h |   13 +++++--------
 1 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/arch/x86/include/asm/linkage.h b/arch/x86/include/asm/linkage.h
index a0d70b4..12d55e7 100644
--- a/arch/x86/include/asm/linkage.h
+++ b/arch/x86/include/asm/linkage.h
@@ -1,6 +1,8 @@
 #ifndef _ASM_X86_LINKAGE_H
 #define _ASM_X86_LINKAGE_H
 
+#include <linux/stringify.h>
+
 #undef notrace
 #define notrace __attribute__((no_instrument_function))
 
@@ -53,14 +55,9 @@
 	.globl name;	\
 	name:
 
-#ifdef CONFIG_X86_64
-#define __ALIGN .p2align 4,,15
-#define __ALIGN_STR ".p2align 4,,15"
-#endif
-
-#ifdef CONFIG_X86_ALIGNMENT_16
-#define __ALIGN .align 16,0x90
-#define __ALIGN_STR ".align 16,0x90"
+#if defined(CONFIG_X86_64) || defined(CONFIG_X86_ALIGNMENT_16)
+#define __ALIGN		.p2align 4, 0x90
+#define __ALIGN_STR	__stringify(__ALIGN)
 #endif
 
 #endif /* __ASSEMBLY__ */
--
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