Jan asked to always use the builtin memcpy on gcc 4.3 mainline because
it should generate better code than the old macro. Let's try it.
Cc: [email protected]
Signed-off-by: Andi Kleen <[email protected]>
---
include/asm-x86_64/string.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
Index: linux/include/asm-x86_64/string.h
===================================================================
--- linux.orig/include/asm-x86_64/string.h
+++ linux/include/asm-x86_64/string.h
@@ -29,6 +29,9 @@ return (to);
function. */
#define __HAVE_ARCH_MEMCPY 1
+#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4
+extern void *memcpy(void *to, const void *from, size_t len);
+#else
extern void *__memcpy(void *to, const void *from, size_t len);
#define memcpy(dst,src,len) \
({ size_t __len = (len); \
@@ -38,7 +41,7 @@ extern void *__memcpy(void *to, const vo
else \
__ret = __builtin_memcpy((dst),(src),__len); \
__ret; })
-
+#endif
#define __HAVE_ARCH_MEMSET
void *memset(void *s, int c, size_t n);
-
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