2 files changed, 11 insertions, 3 deletions

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 5d1a8b0dff8f..3f0666af93de 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -166,10 +166,12 @@ ifdef NO_64BIT
   MBITS := -m32
 else
   #
-  # If we're on a 64-bit kernel, use -m64:
+  # If we're on a 64-bit kernel (except ia64), use -m64:
   #
-  ifneq ($(patsubst %64,%,$(uname_M)),$(uname_M))
-    MBITS := -m64
+  ifneq ($(uname_M),ia64)
+    ifneq ($(patsubst %64,%,$(uname_M)),$(uname_M))
+      MBITS := -m64
+    endif
   endif
 endif
 
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 216bdb223f63..454d5d55f32d 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -53,6 +53,12 @@
 #define cpu_relax()     asm volatile("" ::: "memory")
 #endif
 
+#ifdef __ia64__
+#include "../../arch/ia64/include/asm/unistd.h"
+#define rmb()           asm volatile ("mf" ::: "memory")
+#define cpu_relax()     asm volatile ("hint @pause" ::: "memory")
+#endif
+
 #include <time.h>
 #include <unistd.h>
 #include <sys/types.h>