powerpc: Use cpu_thread_in_core in smp_init for of_spin_map

[cascardo/linux.git] / arch / powerpc / platforms / pseries / smp.c

diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c
index e00f96b..1a231c3 100644 (file)
--- a/arch/powerpc/platforms/pseries/smp.c
+++ b/arch/powerpc/platforms/pseries/smp.c
@@ -52,8 +52,8 @@
 
 
 /*
- * The primary thread of each non-boot processor is recorded here before
- * smp init.
+ * The Primary thread of each non-boot processor was started from the OF client
+ * interface by prom_hold_cpus and is spinning on secondary_hold_spinloop.
  */
 static cpumask_t of_spin_map;
 
@@ -161,8 +161,7 @@ static void __devinit smp_pSeries_kick_cpu(int nr)
 static int smp_pSeries_cpu_bootable(unsigned int nr)
 {
        /* Special case - we inhibit secondary thread startup
-        * during boot if the user requests it.  Odd-numbered
-        * cpus are assumed to be secondary threads.
+        * during boot if the user requests it.
         */
        if (system_state < SYSTEM_RUNNING &&
            cpu_has_feature(CPU_FTR_SMT) &&
@@ -199,11 +198,7 @@ static void __init smp_init_pseries(void)
        /* Mark threads which are still spinning in hold loops. */
        if (cpu_has_feature(CPU_FTR_SMT)) {
                for_each_present_cpu(i) { 
-                       if (i % 2 == 0)
-                               /*
-                                * Even-numbered logical cpus correspond to
-                                * primary threads.
-                                */
+                       if (cpu_thread_in_core(i) == 0)
                                cpu_set(i, of_spin_map);
                }
        } else {