diff options
Diffstat (limited to 'arch/metag/kernel/smp.c')
| -rw-r--r-- | arch/metag/kernel/smp.c | 35 |
1 files changed, 10 insertions, 25 deletions
diff --git a/arch/metag/kernel/smp.c b/arch/metag/kernel/smp.c index f443ec9a7cbe..e413875cf6d2 100644 --- a/arch/metag/kernel/smp.c +++ b/arch/metag/kernel/smp.c @@ -8,6 +8,7 @@ * published by the Free Software Foundation. */ #include <linux/atomic.h> +#include <linux/completion.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/spinlock.h> @@ -62,6 +63,8 @@ static DEFINE_PER_CPU(struct ipi_data, ipi_data) = { static DEFINE_SPINLOCK(boot_lock); +static DECLARE_COMPLETION(cpu_running); + /* * "thread" is assumed to be a valid Meta hardware thread ID. */ @@ -235,20 +238,12 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle) */ ret = boot_secondary(thread, idle); if (ret == 0) { - unsigned long timeout; - /* * CPU was successfully started, wait for it * to come online or time out. */ - timeout = jiffies + HZ; - while (time_before(jiffies, timeout)) { - if (cpu_online(cpu)) - break; - - udelay(10); - barrier(); - } + wait_for_completion_timeout(&cpu_running, + msecs_to_jiffies(1000)); if (!cpu_online(cpu)) ret = -EIO; @@ -276,7 +271,6 @@ static DECLARE_COMPLETION(cpu_killed); int __cpuexit __cpu_disable(void) { unsigned int cpu = smp_processor_id(); - struct task_struct *p; /* * Take this CPU offline. Once we clear this, we can't return, @@ -296,12 +290,7 @@ int __cpuexit __cpu_disable(void) flush_cache_all(); local_flush_tlb_all(); - read_lock(&tasklist_lock); - for_each_process(p) { - if (p->mm) - cpumask_clear_cpu(cpu, mm_cpumask(p->mm)); - } - read_unlock(&tasklist_lock); + clear_tasks_mm_cpumask(cpu); return 0; } @@ -385,12 +374,7 @@ asmlinkage void secondary_start_kernel(void) setup_priv(); - /* - * Enable local interrupts. - */ - tbi_startup_interrupt(TBID_SIGNUM_TRT); notify_cpu_starting(cpu); - local_irq_enable(); pr_info("CPU%u (thread %u): Booted secondary processor\n", cpu, cpu_2_hwthread_id[cpu]); @@ -402,12 +386,13 @@ asmlinkage void secondary_start_kernel(void) * OK, now it's safe to let the boot CPU continue */ set_cpu_online(cpu, true); + complete(&cpu_running); /* - * Check for cache aliasing. - * Preemption is disabled + * Enable local interrupts. */ - check_for_cache_aliasing(cpu); + tbi_startup_interrupt(TBID_SIGNUM_TRT); + local_irq_enable(); /* * OK, it's off to the idle thread for us |