/* * arch/x86_64/kernel/acpi/processor.c * * Copyright (C) 2005 Intel Corporation * 	Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> * 	- Added _PDC for platforms with Intel CPUs */ #include <linux/kernel.h>#include <linux/module.h>#include <linux/init.h>#include <linux/acpi.h> #include <acpi/processor.h>#include <asm/acpi.h> static void init_intel_pdc(struct acpi_processor *pr, struct cpuinfo_x86 *c){	struct acpi_object_list *obj_list;	union acpi_object *obj;	u32 *buf; 	/* allocate and initialize pdc. It will be used later. */	obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL);	if (!obj_list) {		printk(KERN_ERR "Memory allocation error\n");		return;	} 	obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL);	if (!obj) {		printk(KERN_ERR "Memory allocation error\n");		kfree(obj_list);		return;	} 	buf = kmalloc(12, GFP_KERNEL);	if (!buf) {		printk(KERN_ERR "Memory allocation error\n");		kfree(obj);		kfree(obj_list);		return;	} 	buf[0] = ACPI_PDC_REVISION_ID;	buf[1] = 1;	buf[2] = ACPI_PDC_EST_CAPABILITY_SMP; 	obj->type = ACPI_TYPE_BUFFER;	obj->buffer.length = 12;	obj->buffer.pointer = (u8 *) buf;	obj_list->count = 1;	obj_list->pointer = obj;	pr->pdc = obj_list; 	return;} /* Initialize _PDC data based on the CPU vendor */void arch_acpi_processor_init_pdc(struct acpi_processor *pr){	unsigned int cpu = pr->id;	struct cpuinfo_x86 *c = cpu_data + cpu; 	pr->pdc = NULL;	if (c->x86_vendor == X86_VENDOR_INTEL && cpu_has(c, X86_FEATURE_EST))		init_intel_pdc(pr, c); 	return;} EXPORT_SYMBOL(arch_acpi_processor_init_pdc);