ARM: msm: kill off hotplug.c

Right now hotplug.c only really implements msm_cpu_die as a wfi.  Just
move that implementation into platsmp.c.  At the same time we use the
existing wfi() instead of inline asm.
Signed-off-by: Kumar Gala <galak@codeaurora.org>

arch/arm/mach-msm/Makefile

@@ -18,7 +18,6 @@ obj-$(CONFIG_MSM_SCM) += scm.o scm-boot.o
 
 CFLAGS_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1)
 
-obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
 obj-$(CONFIG_SMP) += platsmp.o
 
 obj-$(CONFIG_MACH_TROUT) += board-trout.o board-trout-gpio.o board-trout-mmc.o devices-msm7x00.o

arch/arm/mach-msm/common.h

@@ -24,7 +24,6 @@ extern void __iomem *__msm_ioremap_caller(phys_addr_t phys_addr, size_t size,
 					  unsigned int mtype, void *caller);
 
 extern struct smp_operations msm_smp_ops;
-extern void msm_cpu_die(unsigned int cpu);
 
 struct msm_mmc_platform_data;
 

arch/arm/mach-msm/hotplug.c

-/*
- *  Copyright (C) 2002 ARM Ltd.
- *  All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/smp.h>
-
-#include <asm/smp_plat.h>
-
-#include "common.h"
-
-static inline void cpu_enter_lowpower(void)
-{
-}
-
-static inline void cpu_leave_lowpower(void)
-{
-}
-
-static inline void platform_do_lowpower(unsigned int cpu)
-{
-	asm("wfi"
-	    :
-	    :
-	    : "memory", "cc");
-}
-
-/*
- * platform-specific code to shutdown a CPU
- *
- * Called with IRQs disabled
- */
-void __ref msm_cpu_die(unsigned int cpu)
-{
-	/*
-	 * we're ready for shutdown now, so do it
-	 */
-	cpu_enter_lowpower();
-	platform_do_lowpower(cpu);
-
-	/*
-	 * bring this CPU back into the world of cache
-	 * coherency, and then restore interrupts
-	 */
-	cpu_leave_lowpower();
-}

arch/arm/mach-msm/platsmp.c

@@ -29,6 +29,13 @@ extern void secondary_startup(void);
 
 static DEFINE_SPINLOCK(boot_lock);
 
+#ifdef CONFIG_HOTPLUG_CPU
+static void __ref msm_cpu_die(unsigned int cpu)
+{
+	wfi();
+}
+#endif
+
 static inline int get_core_count(void)
 {
 	/* 1 + the PART[1:0] field of MIDR */