diff mbox

x86: fix fortified memcpy

Message ID 20170627150047.660360-1-arnd@arndb.de
State New
Headers show

Commit Message

Arnd Bergmann June 27, 2017, 3 p.m. UTC 
__memcpy3d is not available when CONFIG_FORTIFY_SOURCE is enabled,
leading to a link error on 32-bit kernels:

arch/x86/lib/memcpy_32.c: In function 'memcpy':
arch/x86/lib/memcpy_32.c:10:9: error: implicit declaration of function '__memcpy3d'; did you mean '__memcpy'? [-Werror=implicit-function-declaration]

This uses the same #ifdef around the use of the function that
now protects the definition.

Fixes: mmotm ("include/linux/string.h: add the option of fortified string.h functions")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

---
 arch/x86/lib/memcpy_32.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.9.0
diff mbox

Patch

diff --git a/arch/x86/lib/memcpy_32.c b/arch/x86/lib/memcpy_32.c
index cad12634d6bd..2eab7d0bfedd 100644
--- a/arch/x86/lib/memcpy_32.c
+++ b/arch/x86/lib/memcpy_32.c
@@ -6,7 +6,7 @@ 
 
 __visible void *memcpy(void *to, const void *from, size_t n)
 {
-#ifdef CONFIG_X86_USE_3DNOW
+#if defined(CONFIG_X86_USE_3DNOW) && !defined(CONFIG_FORTIFY_SOURCE)
 	return __memcpy3d(to, from, n);
 #else
 	return __memcpy(to, from, n);