5 files changed, 1 insertions, 29 deletions

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index cdeb727527d3..d616ed51e7a7 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -295,13 +295,6 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
          */
         percpu_timer_setup();
 
-        while (!cpu_active(cpu))
-                cpu_relax();
-
-        /*
-         * cpu_active bit is set, so it's safe to enalbe interrupts
-         * now.
-         */
         local_irq_enable();
         local_fiq_enable();
 
diff --git a/arch/hexagon/kernel/smp.c b/arch/hexagon/kernel/smp.c
index c871a2cffaef..0123c63e9a3a 100644
--- a/arch/hexagon/kernel/smp.c
+++ b/arch/hexagon/kernel/smp.c
@@ -179,8 +179,6 @@ void __cpuinit start_secondary(void)
         printk(KERN_INFO "%s cpu %d\n", __func__, current_thread_info()->cpu);
 
         set_cpu_online(cpu, true);
-        while (!cpumask_test_cpu(cpu, cpu_active_mask))
-                cpu_relax();
         local_irq_enable();
 
         cpu_idle();
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 2398ce6b15ae..b0e28c47ab83 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -550,12 +550,6 @@ int __cpuinit start_secondary(void *cpuvoid)
         S390_lowcore.restart_psw.addr =
                 PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler;
         __ctl_set_bit(0, 28); /* Enable lowcore protection */
-        /*
-         * Wait until the cpu which brought this one up marked it
-         * active before enabling interrupts.
-         */
-        while (!cpumask_test_cpu(smp_processor_id(), cpu_active_mask))
-                cpu_relax();
         local_irq_enable();
         /* cpu_idle will call schedule for us */
         cpu_idle();
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 66d250c00d11..58f78165d308 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -291,19 +291,6 @@ notrace static void __cpuinit start_secondary(void *unused)
         per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
         x86_platform.nmi_init();
 
-        /*
-         * Wait until the cpu which brought this one up marked it
-         * online before enabling interrupts. If we don't do that then
-         * we can end up waking up the softirq thread before this cpu
-         * reached the active state, which makes the scheduler unhappy
-         * and schedule the softirq thread on the wrong cpu. This is
-         * only observable with forced threaded interrupts, but in
-         * theory it could also happen w/o them. It's just way harder
-         * to achieve.
-         */
-        while (!cpumask_test_cpu(smp_processor_id(), cpu_active_mask))
-                cpu_relax();
-
         /* enable local interrupts */
         local_irq_enable();
 
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 95545126be1c..b1ccce819ce2 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5410,7 +5410,7 @@ static int __cpuinit sched_cpu_active(struct notifier_block *nfb,
                                       unsigned long action, void *hcpu)
 {
         switch (action & ~CPU_TASKS_FROZEN) {
-        case CPU_ONLINE:
+        case CPU_STARTING:
         case CPU_DOWN_FAILED:
                 set_cpu_active((long)hcpu, true);
                 return NOTIFY_OK;