From fb4cac573ef6dce8d7543b68306566561c2e5725 Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Tue, 18 Mar 2014 15:26:39 -0400 Subject: x86, boot: Move memcmp() into string.h and string.c 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 Link: http://lkml.kernel.org/r/1395170800-11059-5-git-send-email-vgoyal@redhat.com Signed-off-by: H. Peter Anvin --- arch/x86/boot/compressed/string.c | 11 ----------- 1 file changed, 11 deletions(-) (limited to 'arch/x86/boot/compressed/string.c') diff --git a/arch/x86/boot/compressed/string.c b/arch/x86/boot/compressed/string.c index 3b5a82fc6ad7..920b55e3e241 100644 --- a/arch/x86/boot/compressed/string.c +++ b/arch/x86/boot/compressed/string.c @@ -1,15 +1,4 @@ #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; - asm("repe; cmpsb; setnz %0" - : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); - return diff; -} - #include "../string.c" /* misc.h might pull in string_32.h which has a macro for memcpy. undef that */ -- cgit