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Diffstat (limited to 'kernel/cpu.c')
-rw-r--r--kernel/cpu.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 8ce10043e4a..6ba0f1ecb21 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -401,6 +401,7 @@ int disable_nonboot_cpus(void)
break;
}
}
+
if (!error) {
BUG_ON(num_online_cpus() > 1);
/* Make sure the CPUs won't be enabled by someone else */
@@ -413,6 +414,14 @@ int disable_nonboot_cpus(void)
return error;
}
+void __weak arch_enable_nonboot_cpus_begin(void)
+{
+}
+
+void __weak arch_enable_nonboot_cpus_end(void)
+{
+}
+
void __ref enable_nonboot_cpus(void)
{
int cpu, error;
@@ -424,6 +433,9 @@ void __ref enable_nonboot_cpus(void)
goto out;
printk("Enabling non-boot CPUs ...\n");
+
+ arch_enable_nonboot_cpus_begin();
+
for_each_cpu(cpu, frozen_cpus) {
error = _cpu_up(cpu, 1);
if (!error) {
@@ -432,6 +444,9 @@ void __ref enable_nonboot_cpus(void)
}
printk(KERN_WARNING "Error taking CPU%d up: %d\n", cpu, error);
}
+
+ arch_enable_nonboot_cpus_end();
+
cpumask_clear(frozen_cpus);
out:
cpu_maps_update_done();