Question about memcpy

[bing zhu]

agree! a simple rename would survice.results are the same .kernel is faster
could anyone help fix this ?

2018-07-11 0:03 GMT+08:00 <valdis.kletnieks at vt.edu>:

> On Tue, 10 Jul 2018 22:51:34 +0800, bing zhu said:
>
> > Thank you ,I use this func for both kernel and user ,result are same.
> > void *memcpy(void *dest, const void *src, size_t n)
> > {
>
> Might want to use 'void *my_memcpy(..)' instead, just in case the build
> environment plays #define games with you and causes a different memcpy()
> to get invoked instead.
>
> [/usr/src/linux-next] egrep -r '#define\s*memcpy\(' include/ arch/*/include
> arch/arm64/include/asm/string.h:#define memcpy(dst, src, len)
> __memcpy(dst, src, len)
> arch/m68k/include/asm/string.h:#define memcpy(d, s, n)
> __builtin_memcpy(d, s, n)
> arch/sparc/include/asm/string.h:#define memcpy(t, f, n)
> __builtin_memcpy(t, f, n)
> arch/x86/include/asm/string_64.h:#define memcpy(dst, src, len)
>                       \
> arch/x86/include/asm/string_64.h:#define memcpy(dst, src, len)
> __memcpy(dst, src, len)
> arch/x86/include/asm/string_32.h:#define memcpy(t, f, n)
>               \
> arch/x86/include/asm/string_32.h:#define memcpy(t, f, n)
> __builtin_memcpy(t, f, n)
> arch/x86/include/asm/string_32.h:#define memcpy(t, f, n)
>               \
> arch/xtensa/include/asm/string.h:#define memcpy(dst, src, len)
> __memcpy(dst, src, len)
>
>
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