sh: Split out CPU topology initialization.

Split out the CPU topology initialization to a separate file,
and switch it to a percpu type, rather than an NR_CPUS array.

At the same time, switch to only registering present CPUs,
rather than using the possible CPU map.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/kernel/Makefile

@@ -4,10 +4,9 @@
 
 extra-y	:= head.o init_task.o vmlinux.lds
 
-obj-y	:= process.o signal.o traps.o irq.o \
-	ptrace.o setup.o time.o sys_sh.o semaphore.o \
-	io.o io_generic.o sh_ksyms.o syscalls.o \
-	debugtraps.o
+obj-y	:= debugtraps.o io.o io_generic.o irq.o process.o ptrace.o \
+	   semaphore.o setup.o signal.o sys_sh.o syscalls.o \
+	   time.o topology.o traps.o
 
 obj-y				+= cpu/ timers/
 obj-$(CONFIG_VSYSCALL)		+= vsyscall/
@@ -17,7 +16,7 @@ obj-$(CONFIG_CF_ENABLER)	+= cf-enabler.o
 obj-$(CONFIG_SH_STANDARD_BIOS)	+= sh_bios.o
 obj-$(CONFIG_SH_KGDB)		+= kgdb_stub.o kgdb_jmp.o
 obj-$(CONFIG_SH_CPU_FREQ)	+= cpufreq.o
-obj-$(CONFIG_MODULES)		+= module.o
+obj-$(CONFIG_MODULES)		+= sh_ksyms.o module.o
 obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 obj-$(CONFIG_KEXEC)		+= machine_kexec.o relocate_kernel.o
 obj-$(CONFIG_CRASH_DUMP)	+= crash_dump.o

arch/sh/kernel/setup.c

@@ -23,6 +23,7 @@
 #include <linux/kexec.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
+#include <asm/page.h>
 #include <asm/sections.h>
 #include <asm/irq.h>
 #include <asm/setup.h>
@@ -389,20 +390,6 @@ struct sh_machine_vector* __init get_mv_byname(const char* name)
 	return NULL;
 }
 
-static struct cpu cpu[NR_CPUS];
-
-static int __init topology_init(void)
-{
-	int cpu_id;
-
-	for_each_possible_cpu(cpu_id)
-		register_cpu(&cpu[cpu_id], cpu_id);
-
-	return 0;
-}
-
-subsys_initcall(topology_init);
-
 static const char *cpu_name[] = {
 	[CPU_SH7206]	= "SH7206",	[CPU_SH7619]	= "SH7619",
 	[CPU_SH7604]	= "SH7604",	[CPU_SH7300]	= "SH7300",

arch/sh/kernel/topology.c

+#include <linux/cpu.h>
+#include <linux/cpumask.h>
+#include <linux/init.h>
+#include <linux/percpu.h>
+
+static DEFINE_PER_CPU(struct cpu, cpu_devices);
+
+static int __init topology_init(void)
+{
+	int i, ret;
+
+	for_each_present_cpu(i) {
+		ret = register_cpu(&per_cpu(cpu_devices, i), i);
+		if (unlikely(ret))
+			printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
+			       __FUNCTION__, i, ret);
+	}
+
+	return 0;
+}
+subsys_initcall(topology_init);