Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux...

[linux-2.6] / arch / powerpc / platforms / pseries / hotplug-cpu.c

diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 9711eb0d549645fee11f198fcb1cdf4ddc9f8860..1f032483c026e613b4ab84649ab2f3562fb7c031 100644 (file)
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -29,6 +29,7 @@
 #include <asm/vdso_datapage.h>
 #include <asm/pSeries_reconfig.h>
 #include "xics.h"
+#include "plpar_wrappers.h"
 
 /* This version can't take the spinlock, because it never returns */
 static struct rtas_args rtas_stop_self_args = {
@@ -57,7 +58,8 @@ static void pseries_mach_cpu_die(void)
 {
        local_irq_disable();
        idle_task_exit();
-       xics_teardown_cpu(0);
+       xics_teardown_cpu();
+       unregister_slb_shadow(hard_smp_processor_id(), __pa(get_slb_shadow()));
        rtas_stop_self();
        /* Should never get here... */
        BUG();
@@ -151,7 +153,7 @@ static int pseries_add_processor(struct device_node *np)
        for (i = 0; i < nthreads; i++)
                cpu_set(i, tmp);
 
-       lock_cpu_hotplug();
+       cpu_maps_update_begin();
 
        BUG_ON(!cpus_subset(cpu_present_map, cpu_possible_map));
 
@@ -188,7 +190,7 @@ static int pseries_add_processor(struct device_node *np)
        }
        err = 0;
 out_unlock:
-       unlock_cpu_hotplug();
+       cpu_maps_update_done();
        return err;
 }
 
@@ -209,7 +211,7 @@ static void pseries_remove_processor(struct device_node *np)
 
        nthreads = len / sizeof(u32);
 
-       lock_cpu_hotplug();
+       cpu_maps_update_begin();
        for (i = 0; i < nthreads; i++) {
                for_each_present_cpu(cpu) {
                        if (get_hard_smp_processor_id(cpu) != intserv[i])
@@ -223,7 +225,7 @@ static void pseries_remove_processor(struct device_node *np)
                        printk(KERN_WARNING "Could not find cpu to remove "
                               "with physical id 0x%x\n", intserv[i]);
        }
-       unlock_cpu_hotplug();
+       cpu_maps_update_done();
 }
 
 static int pseries_smp_notifier(struct notifier_block *nb,
@@ -252,6 +254,20 @@ static struct notifier_block pseries_smp_nb = {
 
 static int __init pseries_cpu_hotplug_init(void)
 {
+       struct device_node *np;
+       const char *typep;
+
+       for_each_node_by_name(np, "interrupt-controller") {
+               typep = of_get_property(np, "compatible", NULL);
+               if (strstr(typep, "open-pic")) {
+                       of_node_put(np);
+
+                       printk(KERN_INFO "CPU Hotplug not supported on "
+                               "systems using MPIC\n");
+                       return 0;
+               }
+       }
+
        rtas_stop_self_args.token = rtas_token("stop-self");
        qcss_tok = rtas_token("query-cpu-stopped-state");