x86/cpu: Move leftover contents of topology.c to setup.c

The only useful piece of arch/x86/kernel/topology.c is the definition
of arch_cpu_is_hotpluggable() that can be moved elsewhere (other
architectures tend to put it into setup.c), so do that and delete
the rest of the file.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/12422874.O9o76ZdvQC@kreacher

arch/x86/kernel/Makefile

@@ -62,7 +62,7 @@ obj-$(CONFIG_X86_64)	+= sys_x86_64.o
 obj-$(CONFIG_X86_ESPFIX64)	+= espfix_64.o
 obj-$(CONFIG_SYSFS)	+= ksysfs.o
 obj-y			+= bootflag.o e820.o
-obj-y			+= pci-dma.o quirks.o topology.o kdebugfs.o
+obj-y			+= pci-dma.o quirks.o kdebugfs.o
 obj-y			+= alternative.o i8253.o hw_breakpoint.o
 obj-y			+= tsc.o tsc_msr.o io_delay.o rtc.o
 obj-y			+= resource.o

arch/x86/kernel/setup.c

@@ -7,6 +7,7 @@
  */
 #include <linux/acpi.h>
 #include <linux/console.h>
+#include <linux/cpu.h>
 #include <linux/crash_dump.h>
 #include <linux/dma-map-ops.h>
 #include <linux/dmi.h>
@@ -1227,3 +1228,10 @@ static int __init register_kernel_offset_dumper(void)
 	return 0;
 }
 __initcall(register_kernel_offset_dumper);
+
+#ifdef CONFIG_HOTPLUG_CPU
+bool arch_cpu_is_hotpluggable(int cpu)
+{
+	return cpu > 0;
+}
+#endif /* CONFIG_HOTPLUG_CPU */

arch/x86/kernel/topology.c

-/*
- * Populate sysfs with topology information
- *
- * Written by: Matthew Dobson, IBM Corporation
- * Original Code: Paul Dorwin, IBM Corporation, Patrick Mochel, OSDL
- *
- * Copyright (C) 2002, IBM Corp.
- *
- * 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 as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT.  See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Send feedback to <colpatch@us.ibm.com>
- */
-#include <linux/interrupt.h>
-#include <linux/nodemask.h>
-#include <linux/export.h>
-#include <linux/mmzone.h>
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/irq.h>
-#include <asm/io_apic.h>
-#include <asm/cpu.h>
-
-#ifdef CONFIG_HOTPLUG_CPU
-bool arch_cpu_is_hotpluggable(int cpu)
-{
-	return cpu > 0;
-}
-#endif /* CONFIG_HOTPLUG_CPU */