Merge branch 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6

[pandora-kernel.git] / arch / powerpc / kernel / smp.c

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index f7a2f81..5337ca7 100644 (file)
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -380,6 +380,29 @@ int __cpuinit __cpu_up(unsigned int cpu)
        return 0;
 }
 
+/* Return the value of the reg property corresponding to the given
+ * logical cpu.
+ */
+int cpu_to_core_id(int cpu)
+{
+       struct device_node *np;
+       const int *reg;
+       int id = -1;
+
+       np = of_get_cpu_node(cpu, NULL);
+       if (!np)
+               goto out;
+
+       reg = of_get_property(np, "reg", NULL);
+       if (!reg)
+               goto out;
+
+       id = *reg;
+out:
+       of_node_put(np);
+       return id;
+}
+
 /* Must be called when no change can occur to cpu_present_map,
  * i.e. during cpu online or offline.
  */