perf tools: Add ia64 support for tools/perf/

Compiler on ia64 rejects the "-m64" option.
Add arch specific pieces to perf.h
Signed-off-by: Tony Luck <tony.luck@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <4b02d7f43514327a@agluck-desktop.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

tools/perf/Makefile

@@ -166,11 +166,13 @@ 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 ($(uname_M),ia64)
     ifneq ($(patsubst %64,%,$(uname_M)),$(uname_M))
       MBITS := -m64
     endif
+  endif
 endif
 
 # CFLAGS and LDFLAGS are for the users to override from the command line.

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>