diff -up /home/petr/fedora/tbb/devel/tbb22_20090809oss-pm/include/tbb/machine/linux_ia32.h\~ /home/petr/fedora/tbb/devel/tbb22_20090809oss-pm/include/tbb/machine/linux_ia32.h
--- tbb22_20090809oss-pm/include/tbb/machine/linux_ia32.h~	2009-08-12 09:05:03.000000000 +0200
+++ tbb22_20090809oss-pm/include/tbb/machine/linux_ia32.h	2010-06-10 17:11:17.000000000 +0200
@@ -39,7 +39,13 @@
 
 #define __TBB_release_consistency_helper() __asm__ __volatile__("": : :"memory")
 
-inline void __TBB_rel_acq_fence() { __asm__ __volatile__("mfence": : :"memory"); }
+inline void __TBB_rel_acq_fence() {
+  int tmp;
+  __asm__ __volatile__("xchg %0,%0"
+		       : "=r"(tmp)
+		       : "r"(tmp)
+		       : "memory");
+}
 
 #define __MACHINE_DECL_ATOMICS(S,T,X) \
 static inline T __TBB_machine_cmpswp##S (volatile void *ptr, T value, T comparand )  \

Diff finished.  Thu Jun 10 17:13:43 2010