x86: build fix for !CONFIG_SMP

Move reset_lazy_tlbstate into tlb_32.c, and define noop versions of
play_dead() in process_{32,64}.c when !CONFIG_SMP.
Signed-off-by: Alex Nixon <alex.nixon@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/cpu/common.c

@@ -714,10 +714,3 @@ void __cpuinit cpu_init(void)
 	mxcsr_feature_mask_init();
 }
 
-void reset_lazy_tlbstate(void)
-{
-	int cpu = raw_smp_processor_id();
-
-	per_cpu(cpu_tlbstate, cpu).state = 0;
-	per_cpu(cpu_tlbstate, cpu).active_mm = &init_mm;
-}

arch/x86/kernel/process_32.c

@@ -72,6 +72,13 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
 	return ((unsigned long *)tsk->thread.sp)[3];
 }
 
+#ifndef CONFIG_SMP
+static inline void play_dead(void)
+{
+	BUG();
+}
+#endif
+
 /*
  * The idle thread. There's no useful work to be
  * done, so just try to conserve power and have a

arch/x86/kernel/process_64.c

@@ -85,6 +85,13 @@ void exit_idle(void)
 	__exit_idle();
 }
 
+#ifndef CONFIG_SMP
+static inline void play_dead(void)
+{
+	BUG();
+}
+#endif
+
 /*
  * The idle thread. There's no useful work to be
  * done, so just try to conserve power and have a

arch/x86/kernel/tlb_32.c

@@ -241,3 +241,11 @@ void flush_tlb_all(void)
 	on_each_cpu(do_flush_tlb_all, NULL, 1);
 }
 
+void reset_lazy_tlbstate(void)
+{
+	int cpu = raw_smp_processor_id();
+
+	per_cpu(cpu_tlbstate, cpu).state = 0;
+	per_cpu(cpu_tlbstate, cpu).active_mm = &init_mm;
+}
+

include/asm-x86/smp.h

@@ -222,14 +222,5 @@ static inline int hard_smp_processor_id(void)
 
 #endif /* CONFIG_X86_LOCAL_APIC */
 
-#ifdef CONFIG_HOTPLUG_CPU
-#ifdef CONFIG_X86_32
-extern void reset_lazy_tlbstate(void);
-#else
-static inline void reset_lazy_tlbstate(void)
-{ }
-#endif /* CONFIG_X86_32 */
-#endif
-
 #endif /* __ASSEMBLY__ */
 #endif

include/asm-x86/tlbflush.h

@@ -119,6 +119,10 @@ static inline void native_flush_tlb_others(const cpumask_t *cpumask,
 {
 }
 
+static inline void reset_lazy_tlbstate(void)
+{
+}
+
 #else  /* SMP */
 
 #include <asm/smp.h>
@@ -151,6 +155,12 @@ struct tlb_state {
 	char __cacheline_padding[L1_CACHE_BYTES-8];
 };
 DECLARE_PER_CPU(struct tlb_state, cpu_tlbstate);
+
+void reset_lazy_tlbstate(void);
+#else
+static inline void reset_lazy_tlbstate(void)
+{
+}
 #endif
 
 #endif	/* SMP */