From: "Ashok Raj" <ashok.raj@intel.com>
Creation of sysfs via topology_init() creates sysfs entries. The creation of
the online control file is created separately when the cpu_up is invoked in
arch independent code.
---
25-akpm/arch/ia64/dig/Makefile | 2 -
25-akpm/arch/ia64/dig/topology.c | 43 +++++++++++++++++++++++++++++++++++++++
25-akpm/include/asm-ia64/cpu.h | 17 +++++++++++++++
3 files changed, 61 insertions(+), 1 deletion(-)
diff -puN arch/ia64/dig/Makefile~ia64-cpu-hotplug-sysfs_ia64 arch/ia64/dig/Makefile
--- 25/arch/ia64/dig/Makefile~ia64-cpu-hotplug-sysfs_ia64 2004-04-25 22:23:14.238501304 -0700
+++ 25-akpm/arch/ia64/dig/Makefile 2004-04-25 22:23:14.242500696 -0700
@@ -5,5 +5,5 @@
# Copyright (C) Srinivasa Thirumalachar (sprasad@engr.sgi.com)
#
-obj-y := setup.o
+obj-y := setup.o topology.o
obj-$(CONFIG_IA64_GENERIC) += machvec.o
diff -puN /dev/null arch/ia64/dig/topology.c
--- /dev/null 2003-09-15 06:40:47.000000000 -0700
+++ 25-akpm/arch/ia64/dig/topology.c 2004-04-25 22:23:14.242500696 -0700
@@ -0,0 +1,43 @@
+/*
+ * arch/ia64/dig/topology.c
+ * Popuate driverfs with topology information.
+ * Derived entirely from i386/mach-default.c
+ * Intel Corporation - Ashok Raj
+ */
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/cpumask.h>
+#include <linux/percpu.h>
+#include <linux/notifier.h>
+#include <linux/cpu.h>
+#include <asm/cpu.h>
+
+static DEFINE_PER_CPU(struct ia64_cpu, cpu_devices);
+
+/*
+ * First Pass: simply borrowed code for now. Later should hook into
+ * hotplug notification for node/cpu/memory as applicable
+ */
+
+static int arch_register_cpu(int num)
+{
+ struct node *parent = NULL;
+
+#ifdef CONFIG_NUMA
+ //parent = &node_devices[cpu_to_node(num)].node;
+#endif
+
+ return register_cpu(&per_cpu(cpu_devices,num).cpu, num, parent);
+}
+
+static int __init topology_init(void)
+{
+ int i;
+
+ for_each_cpu(i) {
+ arch_register_cpu(i);
+ }
+ return 0;
+}
+
+subsys_initcall(topology_init);
diff -puN /dev/null include/asm-ia64/cpu.h
--- /dev/null 2003-09-15 06:40:47.000000000 -0700
+++ 25-akpm/include/asm-ia64/cpu.h 2004-04-25 22:23:14.242500696 -0700
@@ -0,0 +1,17 @@
+#ifndef _ASM_IA64_CPU_H_
+#define _ASM_IA64_CPU_H_
+
+#include <linux/device.h>
+#include <linux/cpu.h>
+#include <linux/topology.h>
+#include <linux/percpu.h>
+
+struct ia64_cpu {
+ struct cpu cpu;
+};
+
+DECLARE_PER_CPU(struct ia64_cpu, cpu_devices);
+
+DECLARE_PER_CPU(int, cpu_state);
+
+#endif /* _ASM_IA64_CPU_H_ */
_