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authorLennert Buytenhek <buytenh@wantstofly.org>2006-09-21 02:24:38 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-09-25 10:34:00 +0100
commit17b602b1c1a38f3f0a4461bb1f571346e751b36b (patch)
tree406ea984d518c5eaa3fd14f03dd17ff216c356d4
parent3b7a86c2f01dafa797908fdcf386f51eb0d01f29 (diff)
[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>
-rw-r--r--include/asm-arm/unaligned.h62
1 files changed, 25 insertions, 37 deletions
diff --git a/include/asm-arm/unaligned.h b/include/asm-arm/unaligned.h
index 1b39c2f322c9..795b9e5b9e6a 100644
--- a/include/asm-arm/unaligned.h
+++ b/include/asm-arm/unaligned.h
@@ -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))))); \
})