vserver 2.0 rc7

[linux-2.6.git] / include / asm-s390 / smp.h

diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h
index e992bd6..9473786 100644 (file)
--- a/include/asm-s390/smp.h
+++ b/include/asm-s390/smp.h
@@ -18,6 +18,7 @@
 #if defined(__KERNEL__) && defined(CONFIG_SMP) && !defined(__ASSEMBLY__)
 
 #include <asm/lowcore.h>
+#include <asm/sigp.h>
 
 /*
   s390 specific smp.c headers
@@ -59,6 +60,30 @@ extern __inline__ __u16 hard_smp_processor_id(void)
         return cpu_address;
 }
 
+/*
+ * returns 1 if cpu is in stopped/check stopped state or not operational
+ * returns 0 otherwise
+ */
+static inline int
+smp_cpu_not_running(int cpu)
+{
+       __u32 status;
+
+       switch (signal_processor_ps(&status, 0, cpu, sigp_sense)) {
+       case sigp_order_code_accepted:
+       case sigp_status_stored:
+               /* Check for stopped and check stop state */
+               if (status & 0x50)
+                       return 1;
+               break;
+       case sigp_not_operational:
+               return 1;
+       default:
+               break;
+       }
+       return 0;
+}
+
 #define cpu_logical_map(cpu) (cpu)
 
 extern int __cpu_disable (void);