[PATCH 2/2] x86/um: Use x86_64-optimized memchr

[Yu-Jen Chang]

Add x86_64-optimized memchr, which is 4x faster
than the original implementation, into um.

Signed-off-by: Yu-Jen Chang <arthurchang09@xxxxxxxxx>
Signed-off-by: Ching-Chun (Jim) Huang <jserv@xxxxxxxxxxxxxxxx>
---
 arch/x86/um/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/um/Makefile b/arch/x86/um/Makefile
index ba5789c35..52b7c21ca 100644
--- a/arch/x86/um/Makefile
+++ b/arch/x86/um/Makefile
@@ -28,7 +28,7 @@ else
 
 obj-y += syscalls_64.o vdso/
 
-subarch-y = ../lib/csum-partial_64.o ../lib/memcpy_64.o ../entry/thunk_64.o
+subarch-y = ../lib/csum-partial_64.o ../lib/memcpy_64.o ../lib/string_64.o ../entry/thunk_64.o
 
 endif
 
-- 
2.25.1