diff --git a/[refs] b/[refs]
index 08f176e51177..557a135a3596 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: df97992c6e25ffc66c549c8bc59262dc627c6d17
+refs/heads/master: af794b94ae8a16fb4a9da6ce640c122efb44e2a0
diff --git a/trunk/Documentation/perf_counter/Makefile b/trunk/Documentation/perf_counter/Makefile
index 005709b7b19a..414399cbc51a 100644
--- a/trunk/Documentation/perf_counter/Makefile
+++ b/trunk/Documentation/perf_counter/Makefile
@@ -159,7 +159,7 @@ uname_V := $(shell sh -c 'uname -v 2>/dev/null || echo not')
 
 # CFLAGS and LDFLAGS are for the users to override from the command line.
 
-CFLAGS = -ggdb3 -Wall -Werror -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -std=gnu99 -Wdeclaration-after-statement -O6
+CFLAGS = -ggdb3 -Wall -Werror -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -std=gnu99 -Wdeclaration-after-statement -O6 -march=native
 LDFLAGS = -lpthread -lrt -lelf
 ALL_CFLAGS = $(CFLAGS)
 ALL_LDFLAGS = $(LDFLAGS)