diff options
Diffstat (limited to 'arch/sparc64/kernel/smp.c')
| -rw-r--r-- | arch/sparc64/kernel/smp.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c index 743ccad61c6..e5627118e61 100644 --- a/arch/sparc64/kernel/smp.c +++ b/arch/sparc64/kernel/smp.c @@ -21,6 +21,7 @@ #include <linux/jiffies.h> #include <linux/profile.h> #include <linux/lmb.h> +#include <linux/cpu.h> #include <asm/head.h> #include <asm/ptrace.h> @@ -80,8 +81,6 @@ void smp_bogo(struct seq_file *m) i, cpu_data(i).clock_tick); } -static __cacheline_aligned_in_smp DEFINE_SPINLOCK(call_lock); - extern void setup_sparc64_timer(void); static volatile unsigned long callin_flag = 0; @@ -117,12 +116,15 @@ void __cpuinit smp_callin(void) atomic_inc(&init_mm.mm_count); current->active_mm = &init_mm; + /* inform the notifiers about the new cpu */ + notify_cpu_starting(cpuid); + while (!cpu_isset(cpuid, smp_commenced_mask)) rmb(); - spin_lock(&call_lock); + ipi_call_lock(); cpu_set(cpuid, cpu_online_map); - spin_unlock(&call_lock); + ipi_call_unlock(); /* idle thread is expected to have preempt disabled */ preempt_disable(); @@ -1305,10 +1307,6 @@ int __cpu_disable(void) c->core_id = 0; c->proc_id = -1; - spin_lock(&call_lock); - cpu_clear(cpu, cpu_online_map); - spin_unlock(&call_lock); - smp_wmb(); /* Make sure no interrupts point to this cpu. */ @@ -1318,6 +1316,10 @@ int __cpu_disable(void) mdelay(1); local_irq_disable(); + ipi_call_lock(); + cpu_clear(cpu, cpu_online_map); + ipi_call_unlock(); + return 0; } |