x86: Set cpu masks before calling CPU_STARTING notifiers

[cascardo/linux.git] / arch / x86 / kernel / smpboot.c

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index f0a0624..68f61ac 100644 (file)
--- a/arch/x86/kernel/smpboot.c
+++ b/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