x86: Set cpu masks before calling CPU_STARTING notifiers

When booting up a CPU set the various topology masks before
calling the CPU_STARTING notifier. This way the notifier
can actually use the masks.

This is needed for a perf change.

Signed-off-by: Andi Kleen <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>

Author: Andi Kleen

arch/x86/kernel/smpboot.c

@@ -281,6 +281,13 @@ static void __cpuinit smp_callin(void)
 	 */
 	smp_store_cpu_info(cpuid);
 
+	/*
+	 * This must be done before setting cpu_online_mask
+	 * or calling notify_cpu_starting.
+	 */
+	set_cpu_sibling_map(raw_smp_processor_id());
+	wmb();
+
 	notify_cpu_starting(cpuid);
 
 	/*
@@ -316,10 +323,6 @@ notrace static void __cpuinit start_secondary(void *unused)
 	 */
 	check_tsc_sync_target();
 
-	/* This must be done before setting cpu_online_mask */
-	set_cpu_sibling_map(raw_smp_processor_id());
-	wmb();
-
 	/*
 	 * We need to hold call_lock, so there is no inconsistency
 	 * between the time smp_call_function() determines number of