[S390] cpu topology support for s390.

Add s390 backend so we can give the scheduler some hints about the
cpu topology.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

2 files changed, 16 insertions, 0 deletions

diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h
index c7b74326a527..a464a66c65d3 100644
--- a/include/asm-s390/smp.h
+++ b/include/asm-s390/smp.h
@@ -90,6 +90,8 @@ extern void __cpu_die (unsigned int cpu);
 extern void cpu_die (void) __attribute__ ((noreturn));
 extern int __cpu_up (unsigned int cpu);
 
+extern struct mutex smp_cpu_state_mutex;
+
 extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
         void *info, int wait);
 #endif
diff --git a/include/asm-s390/topology.h b/include/asm-s390/topology.h
index 613aa64019da..3b28a09a2108 100644
--- a/include/asm-s390/topology.h
+++ b/include/asm-s390/topology.h
@@ -1,6 +1,20 @@
 #ifndef _ASM_S390_TOPOLOGY_H
 #define _ASM_S390_TOPOLOGY_H
 
+#include <linux/cpumask.h>
+
+#define mc_capable()    (1)
+
+cpumask_t cpu_coregroup_map(unsigned int cpu);
+
+#ifdef CONFIG_SMP
+void s390_init_cpu_topology(void);
+#else
+static inline void s390_init_cpu_topology(void)
+{
+};
+#endif
+
 #include <asm-generic/topology.h>
 
 #endif /* _ASM_S390_TOPOLOGY_H */