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-rw-r--r--arch/s390/include/asm/mutex.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/asm/mutex.h b/arch/s390/include/asm/mutex.h
index 458c1f7fbc18..688271f5f2e4 100644
--- a/arch/s390/include/asm/mutex.h
+++ b/arch/s390/include/asm/mutex.h
@@ -7,3 +7,5 @@
*/
#include <asm-generic/mutex-dec.h>
+
+#define arch_mutex_cpu_relax() barrier()