From aad830938ed8ba175d8060751654f78d4115ea0a Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Tue, 18 Mar 2014 15:26:36 -0400 Subject: [PATCH] x86, boot: Undef memcmp before providing a new definition 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 Link: http://lkml.kernel.org/r/1395170800-11059-2-git-send-email-vgoyal@redhat.com Signed-off-by: H. Peter Anvin --- arch/x86/boot/compressed/string.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/boot/compressed/string.c b/arch/x86/boot/compressed/string.c index ffb9c5c9d748..212004ec787d 100644 --- a/arch/x86/boot/compressed/string.c +++ b/arch/x86/boot/compressed/string.c @@ -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;