diff options
Diffstat (limited to 'arch/arm/kernel/smp.c')
| -rw-r--r-- | arch/arm/kernel/smp.c | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 8f8cce2c46c..addbbe8028c 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -58,6 +58,8 @@ enum ipi_msg_type { IPI_CPU_STOP, }; +static DECLARE_COMPLETION(cpu_running); + int __cpuinit __cpu_up(unsigned int cpu) { struct cpuinfo_arm *ci = &per_cpu(cpu_data, cpu); @@ -98,20 +100,12 @@ int __cpuinit __cpu_up(unsigned int cpu) */ ret = boot_secondary(cpu, 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)) { pr_crit("CPU%u: failed to come online\n", cpu); @@ -288,9 +282,10 @@ asmlinkage void __cpuinit secondary_start_kernel(void) /* * OK, now it's safe to let the boot CPU continue. Wait for * the CPU migration code to notice that the CPU is online - * before we continue. + * before we continue - which happens after __cpu_up returns. */ set_cpu_online(cpu, true); + complete(&cpu_running); /* * Setup the percpu timer for this CPU. @@ -354,7 +349,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus) * re-initialize the map in platform_smp_prepare_cpus() if * present != possible (e.g. physical hotplug). */ - init_cpu_present(&cpu_possible_map); + init_cpu_present(cpu_possible_mask); /* * Initialise the SCU if there are more than one CPU @@ -586,8 +581,9 @@ void smp_send_stop(void) unsigned long timeout; if (num_online_cpus() > 1) { - cpumask_t mask = cpu_online_map; - cpu_clear(smp_processor_id(), mask); + struct cpumask mask; + cpumask_copy(&mask, cpu_online_mask); + cpumask_clear_cpu(smp_processor_id(), &mask); smp_cross_call(&mask, IPI_CPU_STOP); } |