X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Facpi%2Fprocessor_core.c;h=ecb2c51220402ddc23a56ebebef566ee6a5e8a47;hb=918aae42aa9b611a3663b16ae849fdedc67c2292;hp=289461649196b7e2cf5cf1b34d0683aadfe901ee;hpb=db89b4f0dbab837d0f3de2c3e9427a8d5393afa3;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c index 2894616..ecb2c51 100644 --- a/drivers/acpi/processor_core.c +++ b/drivers/acpi/processor_core.c @@ -59,7 +59,8 @@ #include #include -#define ACPI_PROCESSOR_COMPONENT 0x01000000 +#define PREFIX "ACPI: " + #define ACPI_PROCESSOR_CLASS "processor" #define ACPI_PROCESSOR_DEVICE_NAME "Processor" #define ACPI_PROCESSOR_FILE_INFO "info" @@ -80,16 +81,18 @@ MODULE_DESCRIPTION("ACPI Processor Driver"); MODULE_LICENSE("GPL"); static int acpi_processor_add(struct acpi_device *device); -static int acpi_processor_start(struct acpi_device *device); static int acpi_processor_remove(struct acpi_device *device, int type); +#ifdef CONFIG_ACPI_PROCFS static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); -static void acpi_processor_notify(acpi_handle handle, u32 event, void *data); +#endif +static void acpi_processor_notify(struct acpi_device *device, u32 event); static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); static int acpi_processor_handle_eject(struct acpi_processor *pr); static const struct acpi_device_id processor_device_ids[] = { - {ACPI_PROCESSOR_HID, 0}, + {ACPI_PROCESSOR_OBJECT_HID, 0}, + {"ACPI0007", 0}, {"", 0}, }; MODULE_DEVICE_TABLE(acpi, processor_device_ids); @@ -101,15 +104,15 @@ static struct acpi_driver acpi_processor_driver = { .ops = { .add = acpi_processor_add, .remove = acpi_processor_remove, - .start = acpi_processor_start, .suspend = acpi_processor_suspend, .resume = acpi_processor_resume, + .notify = acpi_processor_notify, }, }; #define INSTALL_NOTIFY_HANDLER 1 #define UNINSTALL_NOTIFY_HANDLER 2 - +#ifdef CONFIG_ACPI_PROCFS static const struct file_operations acpi_processor_info_fops = { .owner = THIS_MODULE, .open = acpi_processor_info_open_fs, @@ -117,6 +120,7 @@ static const struct file_operations acpi_processor_info_fops = { .llseek = seq_lseek, .release = single_release, }; +#endif DEFINE_PER_CPU(struct acpi_processor *, processors); struct acpi_processor_errata errata __read_mostly; @@ -315,6 +319,7 @@ static int acpi_processor_set_pdc(struct acpi_processor *pr) FS Interface (/proc) -------------------------------------------------------------------------- */ +#ifdef CONFIG_ACPI_PROCFS static struct proc_dir_entry *acpi_processor_dir = NULL; static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) @@ -359,7 +364,6 @@ static int acpi_processor_add_fs(struct acpi_device *device) if (!acpi_device_dir(device)) return -ENODEV; } - acpi_device_dir(device)->owner = THIS_MODULE; /* 'info' [R] */ entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, @@ -388,7 +392,6 @@ static int acpi_processor_add_fs(struct acpi_device *device) return -EIO; return 0; } - static int acpi_processor_remove_fs(struct acpi_device *device) { @@ -405,11 +408,21 @@ static int acpi_processor_remove_fs(struct acpi_device *device) return 0; } +#else +static inline int acpi_processor_add_fs(struct acpi_device *device) +{ + return 0; +} +static inline int acpi_processor_remove_fs(struct acpi_device *device) +{ + return 0; +} +#endif /* Use the acpiid in MADT to map cpus in case of SMP */ #ifndef CONFIG_SMP -static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;} +static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) { return -1; } #else static struct acpi_table_madt *madt; @@ -427,28 +440,59 @@ static int map_lapic_id(struct acpi_subtable_header *entry, return 0; } +static int map_x2apic_id(struct acpi_subtable_header *entry, + int device_declaration, u32 acpi_id, int *apic_id) +{ + struct acpi_madt_local_x2apic *apic = + (struct acpi_madt_local_x2apic *)entry; + u32 tmp = apic->local_apic_id; + + /* Only check enabled APICs*/ + if (!(apic->lapic_flags & ACPI_MADT_ENABLED)) + return 0; + + /* Device statement declaration type */ + if (device_declaration) { + if (apic->uid == acpi_id) + goto found; + } + + return 0; +found: + *apic_id = tmp; + return 1; +} + static int map_lsapic_id(struct acpi_subtable_header *entry, - u32 acpi_id, int *apic_id) + int device_declaration, u32 acpi_id, int *apic_id) { struct acpi_madt_local_sapic *lsapic = (struct acpi_madt_local_sapic *)entry; + u32 tmp = (lsapic->id << 8) | lsapic->eid; + /* Only check enabled APICs*/ - if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { - /* First check against id */ - if (lsapic->processor_id == acpi_id) { - *apic_id = (lsapic->id << 8) | lsapic->eid; - return 1; - /* Check against optional uid */ - } else if (entry->length >= 16 && - lsapic->uid == acpi_id) { - *apic_id = lsapic->uid; - return 1; - } - } + if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED)) + return 0; + + /* Device statement declaration type */ + if (device_declaration) { + if (entry->length < 16) + printk(KERN_ERR PREFIX + "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n", + tmp); + else if (lsapic->uid == acpi_id) + goto found; + /* Processor statement declaration type */ + } else if (lsapic->processor_id == acpi_id) + goto found; + return 0; +found: + *apic_id = tmp; + return 1; } -static int map_madt_entry(u32 acpi_id) +static int map_madt_entry(int type, u32 acpi_id) { unsigned long madt_end, entry; int apic_id = -1; @@ -468,8 +512,11 @@ static int map_madt_entry(u32 acpi_id) if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { if (map_lapic_id(header, acpi_id, &apic_id)) break; + } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) { + if (map_x2apic_id(header, type, acpi_id, &apic_id)) + break; } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { - if (map_lsapic_id(header, acpi_id, &apic_id)) + if (map_lsapic_id(header, type, acpi_id, &apic_id)) break; } entry += header->length; @@ -477,7 +524,7 @@ static int map_madt_entry(u32 acpi_id) return apic_id; } -static int map_mat_entry(acpi_handle handle, u32 acpi_id) +static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id) { struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *obj; @@ -500,7 +547,7 @@ static int map_mat_entry(acpi_handle handle, u32 acpi_id) if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { map_lapic_id(header, acpi_id, &apic_id); } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { - map_lsapic_id(header, acpi_id, &apic_id); + map_lsapic_id(header, type, acpi_id, &apic_id); } exit: @@ -509,14 +556,14 @@ exit: return apic_id; } -static int get_cpu_id(acpi_handle handle, u32 acpi_id) +static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) { int i; int apic_id = -1; - apic_id = map_mat_entry(handle, acpi_id); + apic_id = map_mat_entry(handle, type, acpi_id); if (apic_id == -1) - apic_id = map_madt_entry(acpi_id); + apic_id = map_madt_entry(type, acpi_id); if (apic_id == -1) return apic_id; @@ -532,15 +579,16 @@ static int get_cpu_id(acpi_handle handle, u32 acpi_id) Driver Interface -------------------------------------------------------------------------- */ -static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) +static int acpi_processor_get_info(struct acpi_device *device) { acpi_status status = 0; union acpi_object object = { 0 }; struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; - int cpu_index; + struct acpi_processor *pr; + int cpu_index, device_declaration = 0; static int cpu0_initialized; - + pr = acpi_driver_data(device); if (!pr) return -EINVAL; @@ -561,22 +609,8 @@ static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No bus mastering arbitration control\n")); - /* Check if it is a Device with HID and UID */ - if (has_uid) { - unsigned long value; - status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, - NULL, &value); - if (ACPI_FAILURE(status)) { - printk(KERN_ERR PREFIX "Evaluating processor _UID\n"); - return -ENODEV; - } - pr->acpi_id = value; - } else { - /* - * Evalute the processor object. Note that it is common on SMP to - * have the first (boot) processor with a valid PBLK address while - * all others have a NULL address. - */ + if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) { + /* Declared with "Processor" statement; match ProcessorID */ status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Evaluating processor object\n"); @@ -584,12 +618,28 @@ static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) } /* - * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. - * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c - */ + * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. + * >>> 'acpi_get_processor_id(acpi_id, &id)' in + * arch/xxx/acpi.c + */ pr->acpi_id = object.processor.proc_id; + } else { + /* + * Declared with "Device" statement; match _UID. + * Note that we don't handle string _UIDs yet. + */ + unsigned long long value; + status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, + NULL, &value); + if (ACPI_FAILURE(status)) { + printk(KERN_ERR PREFIX + "Evaluating processor _UID [%#x]\n", status); + return -ENODEV; + } + device_declaration = 1; + pr->acpi_id = value; } - cpu_index = get_cpu_id(pr->handle, pr->acpi_id); + cpu_index = get_cpu_id(pr->handle, device_declaration, pr->acpi_id); /* Handle UP system running SMP kernel, with no LAPIC in MADT */ if (!cpu0_initialized && (cpu_index == -1) && @@ -612,7 +662,16 @@ static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) return -ENODEV; } } - + /* + * On some boxes several processors use the same processor bus id. + * But they are located in different scope. For example: + * \_SB.SCK0.CPU0 + * \_SB.SCK1.CPU0 + * Rename the processor device bus id. And the new bus id will be + * generated as the following format: + * CPU+CPU ID. + */ + sprintf(acpi_device_bid(device), "CPU%X", pr->id); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, pr->acpi_id)); @@ -652,106 +711,14 @@ static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) static DEFINE_PER_CPU(void *, processor_device_array); -static int __cpuinit acpi_processor_start(struct acpi_device *device) -{ - int result = 0; - acpi_status status = AE_OK; - struct acpi_processor *pr; - struct sys_device *sysdev; - - pr = acpi_driver_data(device); - - result = acpi_processor_get_info(pr, device->flags.unique_id); - if (result) { - /* Processor is physically not present */ - return 0; - } - - BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); - - /* - * Buggy BIOS check - * ACPI id of processors can be reported wrongly by the BIOS. - * Don't trust it blindly - */ - if (per_cpu(processor_device_array, pr->id) != NULL && - per_cpu(processor_device_array, pr->id) != device) { - printk(KERN_WARNING "BIOS reported wrong ACPI id " - "for the processor\n"); - return -ENODEV; - } - per_cpu(processor_device_array, pr->id) = device; - - per_cpu(processors, pr->id) = pr; - - result = acpi_processor_add_fs(device); - if (result) - goto end; - - sysdev = get_cpu_sysdev(pr->id); - if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) - return -EFAULT; - - status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, - acpi_processor_notify, pr); - - /* _PDC call should be done before doing anything else (if reqd.). */ - arch_acpi_processor_init_pdc(pr); - acpi_processor_set_pdc(pr); -#ifdef CONFIG_CPU_FREQ - acpi_processor_ppc_has_changed(pr); -#endif - acpi_processor_get_throttling_info(pr); - acpi_processor_get_limit_info(pr); - - - acpi_processor_power_init(pr, device); - - pr->cdev = thermal_cooling_device_register("Processor", device, - &processor_cooling_ops); - if (IS_ERR(pr->cdev)) { - result = PTR_ERR(pr->cdev); - goto end; - } - - dev_info(&device->dev, "registered as cooling_device%d\n", - pr->cdev->id); - - result = sysfs_create_link(&device->dev.kobj, - &pr->cdev->device.kobj, - "thermal_cooling"); - if (result) - printk(KERN_ERR PREFIX "Create sysfs link\n"); - result = sysfs_create_link(&pr->cdev->device.kobj, - &device->dev.kobj, - "device"); - if (result) - printk(KERN_ERR PREFIX "Create sysfs link\n"); - - if (pr->flags.throttling) { - printk(KERN_INFO PREFIX "%s [%s] (supports", - acpi_device_name(device), acpi_device_bid(device)); - printk(" %d throttling states", pr->throttling.state_count); - printk(")\n"); - } - - end: - - return result; -} - -static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) +static void acpi_processor_notify(struct acpi_device *device, u32 event) { - struct acpi_processor *pr = data; - struct acpi_device *device = NULL; + struct acpi_processor *pr = acpi_driver_data(device); int saved; if (!pr) return; - if (acpi_bus_get_device(pr->handle, &device)) - return; - switch (event) { case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: saved = pr->performance_platform_limit; @@ -761,20 +728,20 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) acpi_bus_generate_proc_event(device, event, pr->performance_platform_limit); acpi_bus_generate_netlink_event(device->pnp.device_class, - device->dev.bus_id, event, + dev_name(&device->dev), event, pr->performance_platform_limit); break; case ACPI_PROCESSOR_NOTIFY_POWER: acpi_processor_cst_has_changed(pr); acpi_bus_generate_proc_event(device, event, 0); acpi_bus_generate_netlink_event(device->pnp.device_class, - device->dev.bus_id, event, 0); + dev_name(&device->dev), event, 0); break; case ACPI_PROCESSOR_NOTIFY_THROTTLING: acpi_processor_tstate_has_changed(pr); acpi_bus_generate_proc_event(device, event, 0); acpi_bus_generate_netlink_event(device->pnp.device_class, - device->dev.bus_id, event, 0); + dev_name(&device->dev), event, 0); default: ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unsupported event [0x%x]\n", event)); @@ -803,29 +770,117 @@ static struct notifier_block acpi_cpu_notifier = .notifier_call = acpi_cpu_soft_notify, }; -static int acpi_processor_add(struct acpi_device *device) +static int __cpuinit acpi_processor_add(struct acpi_device *device) { struct acpi_processor *pr = NULL; - - - if (!device) - return -EINVAL; + int result = 0; + struct sys_device *sysdev; pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); if (!pr) return -ENOMEM; + if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { + kfree(pr); + return -ENOMEM; + } + pr->handle = device->handle; strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); device->driver_data = pr; + result = acpi_processor_get_info(device); + if (result) { + /* Processor is physically not present */ + return 0; + } + + BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); + + /* + * Buggy BIOS check + * ACPI id of processors can be reported wrongly by the BIOS. + * Don't trust it blindly + */ + if (per_cpu(processor_device_array, pr->id) != NULL && + per_cpu(processor_device_array, pr->id) != device) { + printk(KERN_WARNING "BIOS reported wrong ACPI id " + "for the processor\n"); + result = -ENODEV; + goto err_free_cpumask; + } + per_cpu(processor_device_array, pr->id) = device; + + per_cpu(processors, pr->id) = pr; + + result = acpi_processor_add_fs(device); + if (result) + goto err_free_cpumask; + + sysdev = get_cpu_sysdev(pr->id); + if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) { + result = -EFAULT; + goto err_remove_fs; + } + + /* _PDC call should be done before doing anything else (if reqd.). */ + arch_acpi_processor_init_pdc(pr); + acpi_processor_set_pdc(pr); + arch_acpi_processor_cleanup_pdc(pr); + +#ifdef CONFIG_CPU_FREQ + acpi_processor_ppc_has_changed(pr); +#endif + acpi_processor_get_throttling_info(pr); + acpi_processor_get_limit_info(pr); + + + acpi_processor_power_init(pr, device); + + pr->cdev = thermal_cooling_device_register("Processor", device, + &processor_cooling_ops); + if (IS_ERR(pr->cdev)) { + result = PTR_ERR(pr->cdev); + goto err_power_exit; + } + + dev_dbg(&device->dev, "registered as cooling_device%d\n", + pr->cdev->id); + + result = sysfs_create_link(&device->dev.kobj, + &pr->cdev->device.kobj, + "thermal_cooling"); + if (result) { + printk(KERN_ERR PREFIX "Create sysfs link\n"); + goto err_thermal_unregister; + } + result = sysfs_create_link(&pr->cdev->device.kobj, + &device->dev.kobj, + "device"); + if (result) { + printk(KERN_ERR PREFIX "Create sysfs link\n"); + goto err_remove_sysfs; + } + return 0; + +err_remove_sysfs: + sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); +err_thermal_unregister: + thermal_cooling_device_unregister(pr->cdev); +err_power_exit: + acpi_processor_power_exit(pr, device); +err_remove_fs: + acpi_processor_remove_fs(device); +err_free_cpumask: + free_cpumask_var(pr->throttling.shared_cpu_map); + + return result; } static int acpi_processor_remove(struct acpi_device *device, int type) { - acpi_status status = AE_OK; struct acpi_processor *pr = NULL; @@ -834,10 +889,8 @@ static int acpi_processor_remove(struct acpi_device *device, int type) pr = acpi_driver_data(device); - if (pr->id >= nr_cpu_ids) { - kfree(pr); - return 0; - } + if (pr->id >= nr_cpu_ids) + goto free; if (type == ACPI_BUS_REMOVAL_EJECT) { if (acpi_processor_handle_eject(pr)) @@ -846,9 +899,6 @@ static int acpi_processor_remove(struct acpi_device *device, int type) acpi_processor_power_exit(pr, device); - status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, - acpi_processor_notify); - sysfs_remove_link(&device->dev.kobj, "sysdev"); acpi_processor_remove_fs(device); @@ -862,6 +912,9 @@ static int acpi_processor_remove(struct acpi_device *device, int type) per_cpu(processors, pr->id) = NULL; per_cpu(processor_device_array, pr->id) = NULL; + +free: + free_cpumask_var(pr->throttling.shared_cpu_map); kfree(pr); return 0; @@ -875,7 +928,7 @@ static int acpi_processor_remove(struct acpi_device *device, int type) static int is_processor_present(acpi_handle handle) { acpi_status status; - unsigned long sta = 0; + unsigned long long sta = 0; status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); @@ -900,7 +953,6 @@ int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) { acpi_handle phandle; struct acpi_device *pdev; - struct acpi_processor *pr; if (acpi_get_parent(handle, &phandle)) { @@ -915,15 +967,6 @@ int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) return -ENODEV; } - acpi_bus_start(*device); - - pr = acpi_driver_data(*device); - if (!pr) - return -ENODEV; - - if ((pr->id >= 0) && (pr->id < nr_cpu_ids)) { - kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); - } return 0; } @@ -953,25 +996,6 @@ static void __ref acpi_processor_hotplug_notify(acpi_handle handle, "Unable to add the device\n"); break; } - - pr = acpi_driver_data(device); - if (!pr) { - printk(KERN_ERR PREFIX "Driver data is NULL\n"); - break; - } - - if (pr->id >= 0 && (pr->id < nr_cpu_ids)) { - kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); - break; - } - - result = acpi_processor_start(device); - if ((!result) && ((pr->id >= 0) && (pr->id < nr_cpu_ids))) { - kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); - } else { - printk(KERN_ERR PREFIX "Device [%s] failed to start\n", - acpi_device_bid(device)); - } break; case ACPI_NOTIFY_EJECT_REQUEST: ACPI_DEBUG_PRINT((ACPI_DB_INFO, @@ -988,9 +1012,6 @@ static void __ref acpi_processor_hotplug_notify(acpi_handle handle, "Driver data is NULL, dropping EJECT\n"); return; } - - if ((pr->id < nr_cpu_ids) && (cpu_present(pr->id))) - kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); break; default: ACPI_DEBUG_PRINT((ACPI_DB_INFO, @@ -1109,6 +1130,9 @@ static int __init acpi_processor_init(void) { int result = 0; + if (acpi_disabled) + return 0; + memset(&errata, 0, sizeof(errata)); #ifdef CONFIG_SMP @@ -1116,12 +1140,11 @@ static int __init acpi_processor_init(void) (struct acpi_table_header **)&madt))) madt = NULL; #endif - +#ifdef CONFIG_ACPI_PROCFS acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); if (!acpi_processor_dir) return -ENOMEM; - acpi_processor_dir->owner = THIS_MODULE; - +#endif /* * Check whether the system is DMI table. If yes, OSPM * should not use mwait for CPU-states. @@ -1149,13 +1172,18 @@ out_cpuidle: cpuidle_unregister_driver(&acpi_idle_driver); out_proc: +#ifdef CONFIG_ACPI_PROCFS remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); +#endif return result; } static void __exit acpi_processor_exit(void) { + if (acpi_disabled) + return; + acpi_processor_ppc_exit(); acpi_thermal_cpufreq_exit(); @@ -1166,7 +1194,9 @@ static void __exit acpi_processor_exit(void) cpuidle_unregister_driver(&acpi_idle_driver); +#ifdef CONFIG_ACPI_PROCFS remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); +#endif return; }