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x86, boot: Undef memcmp before providing a new definition

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With CONFIG_X86_32=y, string_32.h gets pulled in compressed/string.c by
"misch.h". string_32.h defines a macro to map memcmp to __builtin_memcmp().
And that macro in turn changes the name of memcmp() defined here and
converts it to __builtin_memcmp().

I thought that's not the intention though. We probably want to provide
our own optimized definition of memcmp(). If yes, then undef the memcmp
before we define a new memcmp.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Link: http://lkml.kernel.org/r/1395170800-11059-2-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 15:26:36 -04:00 committed by H. Peter Anvin
parent dcb99fd9b0
commit aad830938e
1 changed files with 2 additions and 0 deletions
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2
arch/x86/boot/compressed/string.c
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@ -1,5 +1,7 @@
#include "misc.h"
/* Avoid intereference from any defines in string_32.h */
#undef memcmp
int memcmp(const void *s1, const void *s2, size_t len)
{
u8 diff;