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x86, boot: Move memcmp() into string.h and string.c

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Try to treat memcmp() in same way as memcpy() and memset(). Provide a
declaration in boot/string.h and by default user gets a memcmp() which
maps to builtin function.

Move optimized definition of memcmp() in boot/string.c. Now a user can
do #undef memcmp and link against string.c to use optimzied memcmp().

It also simplifies boot/compressed/string.c where we had to redefine
memcmp(). That extra definition is gone now.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Link: http://lkml.kernel.org/r/1395170800-11059-5-git-send-email-vgoyal@redhat.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Vivek Goyal 2014-03-18 15:26:39 -04:00 • committed by H. Peter Anvin
parent 820e8feca0
commit fb4cac573e
4 changed files with 16 additions and 19 deletions
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2
arch/x86/boot/string.h
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@ -8,6 +8,7 @@
void *memcpy(void *dst, const void *src, size_t len);
void *memset(void *dst, int c, size_t len);
int memcmp(const void *s1, const void *s2, size_t len);
/*
* Access builtin version by default. If one needs to use optimized version,
@ -15,5 +16,6 @@ void *memset(void *dst, int c, size_t len);
*/
#define memcpy(d,s,l) __builtin_memcpy(d,s,l)
#define memset(d,c,l) __builtin_memset(d,c,l)
#define memcmp __builtin_memcmp
#endif /* BOOT_STRING_H */