x86, pat/mtrr: Rendezvous all the cpus for MTRR/PAT init

[karo-tx-linux.git] / kernel / cpu.c

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 8ce10043e4aca1d9d48ab9f127e6079c8634f9fd..f5f9485b8c0f9a30f4084b0c9a8846f74e05d72d 100644 (file)
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -413,6 +413,14 @@ 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 +432,9 @@ 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 +443,9 @@ 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();