From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Wed, 8 Mar 2006 05:55:28 +0000 (-0800)
Subject: [PATCH] __get_unaligned() gcc-4 fix
X-Git-Tag: v2.6.16-rc6~72
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=707ced0d718e89b52b13aa55a64653083e792cca;p=linux-2.6

[PATCH] __get_unaligned() gcc-4 fix

If the 'ptr' is a const, this code cause "assignment of read-only variable"
error on gcc 4.x.

Use __u64 instead of __typeof__(*(ptr)) for temporary variable to get
rid of errors on gcc 4.x.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/include/asm-generic/unaligned.h b/include/asm-generic/unaligned.h
index 4dc8ddb401..09ec447fe2 100644
--- a/include/asm-generic/unaligned.h
+++ b/include/asm-generic/unaligned.h
@@ -78,7 +78,7 @@ static inline void __ustw(__u16 val, __u16 *addr)
 
 #define __get_unaligned(ptr, size) ({		\
 	const void *__gu_p = ptr;		\
-	__typeof__(*(ptr)) val;			\
+	__u64 val;				\
 	switch (size) {				\
 	case 1:					\
 		val = *(const __u8 *)__gu_p;	\
@@ -95,7 +95,7 @@ static inline void __ustw(__u16 val, __u16 *addr)
 	default:				\
 		bad_unaligned_access_length();	\
 	};					\
-	val;					\
+	(__typeof__(*(ptr)))val;		\
 })
 
 #define __put_unaligned(val, ptr, size)		\