Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Prevent sparc64 from invoking irq handlers on offline CPUs
  sparc64: Fix IPI call locking.

diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 743ccad..2be166c 100644 (file)
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -80,8 +80,6 @@ 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;
@@ -120,9 +118,9 @@ void __cpuinit smp_callin(void)
        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 +1303,6 @@ 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 +1312,10 @@ int __cpu_disable(void)
        mdelay(1);
        local_irq_disable();
 
+       ipi_call_lock();
+       cpu_clear(cpu, cpu_online_map);
+       ipi_call_unlock();
+
        return 0;
 }