[PATCH] cpu state clean after hot remove
Clean CPU states in order to reuse smp boot code for CPU hotplug.
Signed-off-by: Li Shaohua<shaohua.li@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-i386/irq.h b/include/asm-i386/irq.h
index e2d8bf2..270f198 100644
--- a/include/asm-i386/irq.h
+++ b/include/asm-i386/irq.h
@@ -29,9 +29,11 @@
#ifdef CONFIG_4KSTACKS
extern void irq_ctx_init(int cpu);
+ extern void irq_ctx_exit(int cpu);
# define __ARCH_HAS_DO_SOFTIRQ
#else
# define irq_ctx_init(cpu) do { } while (0)
+# define irq_ctx_exit(cpu) do { } while (0)
#endif
#ifdef CONFIG_IRQBALANCE
diff --git a/include/asm-i386/smp.h b/include/asm-i386/smp.h
index 2451ead..c9996ed 100644
--- a/include/asm-i386/smp.h
+++ b/include/asm-i386/smp.h
@@ -48,6 +48,14 @@
#define MAX_APICID 256
extern u8 x86_cpu_to_apicid[];
+#ifdef CONFIG_HOTPLUG_CPU
+extern void cpu_exit_clear(void);
+extern void cpu_uninit(void);
+
+#define __HAVE_ARCH_SMP_PREPARE_CPU
+extern int smp_prepare_cpu(int cpu);
+#endif
+
/*
* This function is needed by all SMP systems. It must _always_ be valid
* from the initial startup. We map APIC_BASE very early in page_setup(),