[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 4dc8ddb401c15828797b4a7e21586e4b6d3e3418..09ec447fe2af5de7cb67b142257f28fadb805413 100644 (file)
--- 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)                \