[S390] cpu_relax() is supposed to have barrier() semantics.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/include/asm-s390/processor.h b/include/asm-s390/processor.h
index c5cbc4b..5b71d37 100644
--- a/include/asm-s390/processor.h
+++ b/include/asm-s390/processor.h
@@ -199,15 +199,13 @@
/*
* Give up the time slice of the virtual PU.
*/
-#ifndef __s390x__
-# define cpu_relax() asm volatile ("diag 0,0,68" : : : "memory")
-#else /* __s390x__ */
-# define cpu_relax() \
- do { \
- if (MACHINE_HAS_DIAG44) \
- asm volatile ("diag 0,0,68" : : : "memory"); \
- } while (0)
-#endif /* __s390x__ */
+static inline void cpu_relax(void)
+{
+ if (MACHINE_HAS_DIAG44)
+ asm volatile ("diag 0,0,68" : : : "memory");
+ else
+ barrier();
+}
/*
* Set PSW to specified value.
diff --git a/include/asm-s390/setup.h b/include/asm-s390/setup.h
index da3fd4a..19e3197 100644
--- a/include/asm-s390/setup.h
+++ b/include/asm-s390/setup.h
@@ -40,15 +40,16 @@
#define MACHINE_IS_VM (machine_flags & 1)
#define MACHINE_IS_P390 (machine_flags & 4)
#define MACHINE_HAS_MVPG (machine_flags & 16)
-#define MACHINE_HAS_DIAG44 (machine_flags & 32)
#define MACHINE_HAS_IDTE (machine_flags & 128)
#ifndef __s390x__
#define MACHINE_HAS_IEEE (machine_flags & 2)
#define MACHINE_HAS_CSP (machine_flags & 8)
+#define MACHINE_HAS_DIAG44 (1)
#else /* __s390x__ */
#define MACHINE_HAS_IEEE (1)
#define MACHINE_HAS_CSP (1)
+#define MACHINE_HAS_DIAG44 (machine_flags & 32)
#endif /* __s390x__ */