diff options
Diffstat (limited to 'arch/powerpc/kernel/smp.c')
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 71e186d5f331..8ec017cb4446 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -243,7 +243,7 @@ void smp_muxed_ipi_message_pass(int cpu, int msg) irqreturn_t smp_ipi_demux(void) { - struct cpu_messages *info = &__get_cpu_var(ipi_message); + struct cpu_messages *info = this_cpu_ptr(&ipi_message); unsigned int all; mb(); /* order any irq clear */ @@ -442,9 +442,9 @@ void generic_mach_cpu_die(void) idle_task_exit(); cpu = smp_processor_id(); printk(KERN_DEBUG "CPU%d offline\n", cpu); - __get_cpu_var(cpu_state) = CPU_DEAD; + __this_cpu_write(cpu_state, CPU_DEAD); smp_wmb(); - while (__get_cpu_var(cpu_state) != CPU_UP_PREPARE) + while (__this_cpu_read(cpu_state) != CPU_UP_PREPARE) cpu_relax(); } @@ -700,7 +700,6 @@ void start_secondary(void *unused) smp_store_cpu_info(cpu); set_dec(tb_ticks_per_jiffy); preempt_disable(); - cpu_callin_map[cpu] = 1; if (smp_ops->setup_cpu) smp_ops->setup_cpu(cpu); @@ -739,6 +738,14 @@ void start_secondary(void *unused) notify_cpu_starting(cpu); set_cpu_online(cpu, true); + /* + * CPU must be marked active and online before we signal back to the + * master, because the scheduler needs to see the cpu_online and + * cpu_active bits set. + */ + smp_wmb(); + cpu_callin_map[cpu] = 1; + local_irq_enable(); cpu_startup_entry(CPUHP_ONLINE); |