linux-kernel - [PATCH] x86: uaccess: return value of __{get|put}

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Date:	Mon, 08 Dec 2008 19:18:38 -0800
From:	Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] x86: uaccess: return value of __{get|put}_user() can be int

From: Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>

Impact: cleanup

The type of return value of __{get|put}_user() can be int.
There is no user to refer the return value of __{get|put}_user() as long.
This reduces code size a bit on 64-bit.

$ size vmlinux.*
   text	   data	    bss	    dec	    hex	filename
4509265	 479988	 673588	5662841	 566879	vmlinux.new
4511462	 479988	 673588	5665038	 56710e	vmlinux.old

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>
---
 arch/x86/include/asm/uaccess.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index 99192bb..4340055 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -352,14 +352,14 @@ do {									\
 
 #define __put_user_nocheck(x, ptr, size)			\
 ({								\
-	long __pu_err;						\
+	int __pu_err;						\
 	__put_user_size((x), (ptr), (size), __pu_err, -EFAULT);	\
 	__pu_err;						\
 })
 
 #define __get_user_nocheck(x, ptr, size)				\
 ({									\
-	long __gu_err;							\
+	int __gu_err;							\
 	unsigned long __gu_val;						\
 	__get_user_size(__gu_val, (ptr), (size), __gu_err, -EFAULT);	\
 	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
-- 
1.6.0.4

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