Add 'cpu_hotplug_no_control' and when set, the hotplug control file("online")
will not be added under /sys/devices/system/cpu/cpuX/
Next patch doing PCI quirks will use this.
Signed-off-by: Suresh Siddha <[email protected]>
---
diff --git a/arch/i386/kernel/topology.c b/arch/i386/kernel/topology.c
index 07d6da3..9b766e7 100644
--- a/arch/i386/kernel/topology.c
+++ b/arch/i386/kernel/topology.c
@@ -40,14 +40,22 @@ int arch_register_cpu(int num)
* restrictions and assumptions in kernel. This basically
* doesnt add a control file, one cannot attempt to offline
* BSP.
+ *
+ * Also certain PCI quirks require to remove this control file
+ * for all CPU's.
*/
+#ifdef CONFIG_HOTPLUG_CPU
+ if (!num || cpu_hotplug_no_control)
+#else
if (!num)
+#endif
cpu_devices[num].cpu.no_control = 1;
return register_cpu(&cpu_devices[num].cpu, num);
}
#ifdef CONFIG_HOTPLUG_CPU
+int cpu_hotplug_no_control;
void arch_unregister_cpu(int num) {
return unregister_cpu(&cpu_devices[num].cpu);
diff --git a/include/asm-i386/cpu.h b/include/asm-i386/cpu.h
index b1bc7b1..3c5da33 100644
--- a/include/asm-i386/cpu.h
+++ b/include/asm-i386/cpu.h
@@ -13,6 +13,7 @@ struct i386_cpu {
extern int arch_register_cpu(int num);
#ifdef CONFIG_HOTPLUG_CPU
extern void arch_unregister_cpu(int);
+extern int cpu_hotplug_no_control;
#endif
DECLARE_PER_CPU(int, cpu_state);
-
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