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[ARM] 3849/1: fix get_unaligned() for gcc >= 4.1 

gcc 4.1's __typeof__ propagates 'const', which breaks get_unaligned().
Rewrite get_unaligned() not to use __typeof__.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Lennert Buytenhek 2006-09-21 02:24:38 +01:00 committed by Russell King
parent 3b7a86c2f0
commit 17b602b1c1
1 changed files with 25 additions and 37 deletions
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62
include/asm-arm/unaligned.h
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@ -3,7 +3,7 @@
#include <asm/types.h>
extern int __bug_unaligned_x(void *ptr);
extern int __bug_unaligned_x(const void *ptr);
/*
* What is the most efficient way of loading/storing an unaligned value?
@ -51,44 +51,32 @@ extern int __bug_unaligned_x(void *ptr);
#define __get_unaligned_4_be(__p) \
(__p[0] << 24 | __p[1] << 16 | __p[2] << 8 | __p[3])
#define __get_unaligned_le(ptr) \
({ \
__typeof__(*(ptr)) __v; \
__u8 *__p = (__u8 *)(ptr); \
switch (sizeof(*(ptr))) { \
case 1: __v = *(ptr); break; \
case 2: __v = __get_unaligned_2_le(__p); break; \
case 4: __v = __get_unaligned_4_le(__p); break; \
case 8: { \
unsigned int __v1, __v2; \
__v2 = __get_unaligned_4_le((__p+4)); \
__v1 = __get_unaligned_4_le(__p); \
__v = ((unsigned long long)__v2 << 32 | __v1); \
} \
break; \
default: __v = __bug_unaligned_x(__p); break; \
} \
__v; \
#define __get_unaligned_8_le(__p) \
((unsigned long long)__get_unaligned_4_le((__p+4)) << 32 | \
__get_unaligned_4_le(__p))
#define __get_unaligned_8_be(__p) \
((unsigned long long)__get_unaligned_4_be(__p) << 32 | \
__get_unaligned_4_be((__p+4)))
#define __get_unaligned_le(ptr) \
({ \
const __u8 *__p = (const __u8 *)(ptr); \
__builtin_choose_expr(sizeof(*(ptr)) == 1, *__p, \
__builtin_choose_expr(sizeof(*(ptr)) == 2, __get_unaligned_2_le(__p), \
__builtin_choose_expr(sizeof(*(ptr)) == 4, __get_unaligned_4_le(__p), \
__builtin_choose_expr(sizeof(*(ptr)) == 8, __get_unaligned_8_le(__p), \
(void)__bug_unaligned_x(__p))))); \
})
#define __get_unaligned_be(ptr) \
({ \
__typeof__(*(ptr)) __v; \
__u8 *__p = (__u8 *)(ptr); \
switch (sizeof(*(ptr))) { \
case 1: __v = *(ptr); break; \
case 2: __v = __get_unaligned_2_be(__p); break; \
case 4: __v = __get_unaligned_4_be(__p); break; \
case 8: { \
unsigned int __v1, __v2; \
__v2 = __get_unaligned_4_be(__p); \
__v1 = __get_unaligned_4_be((__p+4)); \
__v = ((unsigned long long)__v2 << 32 | __v1); \
} \
break; \
default: __v = __bug_unaligned_x(__p); break; \
} \
__v; \
#define __get_unaligned_be(ptr) \
({ \
const __u8 *__p = (const __u8 *)(ptr); \
__builtin_choose_expr(sizeof(*(ptr)) == 1, *__p, \
__builtin_choose_expr(sizeof(*(ptr)) == 2, __get_unaligned_2_be(__p), \
__builtin_choose_expr(sizeof(*(ptr)) == 4, __get_unaligned_4_be(__p), \
__builtin_choose_expr(sizeof(*(ptr)) == 8, __get_unaligned_8_be(__p), \
(void)__bug_unaligned_x(__p))))); \
})