1 /* 2 * acpi.h - ACPI Interface 3 * 4 * Copyright (C) 2001 Paul Diefenbaugh <[email protected]> 5 * 6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 23 */ 24 25 #ifndef _LINUX_ACPI_H 26 #define _LINUX_ACPI_H 27 28 #include <linux/errno.h> 29 #include <linux/ioport.h> /* for struct resource */ 30 #include <linux/device.h> 31 32 #ifdef CONFIG_ACPI 33 34 #ifndef _LINUX 35 #define _LINUX 36 #endif 37 38 #include <linux/list.h> 39 #include <linux/mod_devicetable.h> 40 41 #include <acpi/acpi.h> 42 #include <acpi/acpi_bus.h> 43 #include <acpi/acpi_drivers.h> 44 #include <acpi/acpi_numa.h> 45 #include <asm/acpi.h> 46 47 enum acpi_irq_model_id { 48 ACPI_IRQ_MODEL_PIC = 0, 49 ACPI_IRQ_MODEL_IOAPIC, 50 ACPI_IRQ_MODEL_IOSAPIC, 51 ACPI_IRQ_MODEL_PLATFORM, 52 ACPI_IRQ_MODEL_COUNT 53 }; 54 55 extern enum acpi_irq_model_id acpi_irq_model; 56 57 enum acpi_interrupt_id { 58 ACPI_INTERRUPT_PMI = 1, 59 ACPI_INTERRUPT_INIT, 60 ACPI_INTERRUPT_CPEI, 61 ACPI_INTERRUPT_COUNT 62 }; 63 64 #define ACPI_SPACE_MEM 0 65 66 enum acpi_address_range_id { 67 ACPI_ADDRESS_RANGE_MEMORY = 1, 68 ACPI_ADDRESS_RANGE_RESERVED = 2, 69 ACPI_ADDRESS_RANGE_ACPI = 3, 70 ACPI_ADDRESS_RANGE_NVS = 4, 71 ACPI_ADDRESS_RANGE_COUNT 72 }; 73 74 75 /* Table Handlers */ 76 77 typedef int (*acpi_table_handler) (struct acpi_table_header *table); 78 79 typedef int (*acpi_table_entry_handler) (struct acpi_subtable_header *header, const unsigned long end); 80 81 char * __acpi_map_table (unsigned long phys_addr, unsigned long size); 82 void __acpi_unmap_table(char *map, unsigned long size); 83 int early_acpi_boot_init(void); 84 int acpi_boot_init (void); 85 void acpi_boot_table_init (void); 86 int acpi_mps_check (void); 87 int acpi_numa_init (void); 88 89 int acpi_table_init (void); 90 int acpi_table_parse (char *id, acpi_table_handler handler); 91 int __init acpi_table_parse_entries(char *id, unsigned long table_size, 92 int entry_id, acpi_table_entry_handler handler, unsigned int max_entries); 93 int acpi_table_parse_madt (enum acpi_madt_type id, acpi_table_entry_handler handler, unsigned int max_entries); 94 int acpi_parse_mcfg (struct acpi_table_header *header); 95 void acpi_table_print_madt_entry (struct acpi_subtable_header *madt); 96 97 /* the following four functions are architecture-dependent */ 98 void acpi_numa_slit_init (struct acpi_table_slit *slit); 99 void acpi_numa_processor_affinity_init (struct acpi_srat_cpu_affinity *pa); 100 void acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa); 101 int acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma); 102 void acpi_numa_arch_fixup(void); 103 104 #ifdef CONFIG_ACPI_HOTPLUG_CPU 105 /* Arch dependent functions for cpu hotplug support */ 106 int acpi_map_lsapic(acpi_handle handle, int *pcpu); 107 int acpi_unmap_lsapic(int cpu); 108 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 109 110 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base); 111 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base); 112 void acpi_irq_stats_init(void); 113 extern u32 acpi_irq_handled; 114 extern u32 acpi_irq_not_handled; 115 116 extern int sbf_port; 117 extern unsigned long acpi_realmode_flags; 118 119 int acpi_register_gsi (struct device *dev, u32 gsi, int triggering, int polarity); 120 int acpi_gsi_to_irq (u32 gsi, unsigned int *irq); 121 int acpi_isa_irq_to_gsi (unsigned isa_irq, u32 *gsi); 122 123 #ifdef CONFIG_X86_IO_APIC 124 extern int acpi_get_override_irq(u32 gsi, int *trigger, int *polarity); 125 #else 126 #define acpi_get_override_irq(gsi, trigger, polarity) (-1) 127 #endif 128 /* 129 * This function undoes the effect of one call to acpi_register_gsi(). 130 * If this matches the last registration, any IRQ resources for gsi 131 * are freed. 132 */ 133 void acpi_unregister_gsi (u32 gsi); 134 135 struct pci_dev; 136 137 int acpi_pci_irq_enable (struct pci_dev *dev); 138 void acpi_penalize_isa_irq(int irq, int active); 139 140 void acpi_pci_irq_disable (struct pci_dev *dev); 141 142 struct acpi_pci_driver { 143 struct list_head node; 144 int (*add)(struct acpi_pci_root *root); 145 void (*remove)(struct acpi_pci_root *root); 146 }; 147 148 int acpi_pci_register_driver(struct acpi_pci_driver *driver); 149 void acpi_pci_unregister_driver(struct acpi_pci_driver *driver); 150 151 extern int ec_read(u8 addr, u8 *val); 152 extern int ec_write(u8 addr, u8 val); 153 extern int ec_transaction(u8 command, 154 const u8 *wdata, unsigned wdata_len, 155 u8 *rdata, unsigned rdata_len); 156 extern acpi_handle ec_get_handle(void); 157 158 #if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE) 159 160 typedef void (*wmi_notify_handler) (u32 value, void *context); 161 162 extern acpi_status wmi_evaluate_method(const char *guid, u8 instance, 163 u32 method_id, 164 const struct acpi_buffer *in, 165 struct acpi_buffer *out); 166 extern acpi_status wmi_query_block(const char *guid, u8 instance, 167 struct acpi_buffer *out); 168 extern acpi_status wmi_set_block(const char *guid, u8 instance, 169 const struct acpi_buffer *in); 170 extern acpi_status wmi_install_notify_handler(const char *guid, 171 wmi_notify_handler handler, void *data); 172 extern acpi_status wmi_remove_notify_handler(const char *guid); 173 extern acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out); 174 extern bool wmi_has_guid(const char *guid); 175 176 #endif /* CONFIG_ACPI_WMI */ 177 178 #define ACPI_VIDEO_OUTPUT_SWITCHING 0x0001 179 #define ACPI_VIDEO_DEVICE_POSTING 0x0002 180 #define ACPI_VIDEO_ROM_AVAILABLE 0x0004 181 #define ACPI_VIDEO_BACKLIGHT 0x0008 182 #define ACPI_VIDEO_BACKLIGHT_FORCE_VENDOR 0x0010 183 #define ACPI_VIDEO_BACKLIGHT_FORCE_VIDEO 0x0020 184 #define ACPI_VIDEO_OUTPUT_SWITCHING_FORCE_VENDOR 0x0040 185 #define ACPI_VIDEO_OUTPUT_SWITCHING_FORCE_VIDEO 0x0080 186 #define ACPI_VIDEO_BACKLIGHT_DMI_VENDOR 0x0100 187 #define ACPI_VIDEO_BACKLIGHT_DMI_VIDEO 0x0200 188 #define ACPI_VIDEO_OUTPUT_SWITCHING_DMI_VENDOR 0x0400 189 #define ACPI_VIDEO_OUTPUT_SWITCHING_DMI_VIDEO 0x0800 190 191 #if defined(CONFIG_ACPI_VIDEO) || defined(CONFIG_ACPI_VIDEO_MODULE) 192 193 extern long acpi_video_get_capabilities(acpi_handle graphics_dev_handle); 194 extern long acpi_is_video_device(struct acpi_device *device); 195 extern void acpi_video_dmi_promote_vendor(void); 196 extern void acpi_video_dmi_demote_vendor(void); 197 extern int acpi_video_backlight_support(void); 198 extern int acpi_video_display_switch_support(void); 199 200 #else 201 202 static inline long acpi_video_get_capabilities(acpi_handle graphics_dev_handle) 203 { 204 return 0; 205 } 206 207 static inline long acpi_is_video_device(struct acpi_device *device) 208 { 209 return 0; 210 } 211 212 static inline void acpi_video_dmi_promote_vendor(void) 213 { 214 } 215 216 static inline void acpi_video_dmi_demote_vendor(void) 217 { 218 } 219 220 static inline int acpi_video_backlight_support(void) 221 { 222 return 0; 223 } 224 225 static inline int acpi_video_display_switch_support(void) 226 { 227 return 0; 228 } 229 230 #endif /* defined(CONFIG_ACPI_VIDEO) || defined(CONFIG_ACPI_VIDEO_MODULE) */ 231 232 extern int acpi_blacklisted(void); 233 extern void acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d); 234 extern void acpi_osi_setup(char *str); 235 236 #ifdef CONFIG_ACPI_NUMA 237 int acpi_get_pxm(acpi_handle handle); 238 int acpi_get_node(acpi_handle *handle); 239 #else 240 static inline int acpi_get_pxm(acpi_handle handle) 241 { 242 return 0; 243 } 244 static inline int acpi_get_node(acpi_handle *handle) 245 { 246 return 0; 247 } 248 #endif 249 extern int acpi_paddr_to_node(u64 start_addr, u64 size); 250 251 extern int pnpacpi_disabled; 252 253 #define PXM_INVAL (-1) 254 255 bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res); 256 bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res); 257 bool acpi_dev_resource_address_space(struct acpi_resource *ares, 258 struct resource *res); 259 bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares, 260 struct resource *res); 261 unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable); 262 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, 263 struct resource *res); 264 265 struct resource_list_entry { 266 struct list_head node; 267 struct resource res; 268 }; 269 270 void acpi_dev_free_resource_list(struct list_head *list); 271 int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list, 272 int (*preproc)(struct acpi_resource *, void *), 273 void *preproc_data); 274 275 int acpi_check_resource_conflict(const struct resource *res); 276 277 int acpi_check_region(resource_size_t start, resource_size_t n, 278 const char *name); 279 280 int acpi_resources_are_enforced(void); 281 282 #ifdef CONFIG_HIBERNATION 283 void __init acpi_no_s4_hw_signature(void); 284 #endif 285 286 #ifdef CONFIG_PM_SLEEP 287 void __init acpi_old_suspend_ordering(void); 288 void __init acpi_nvs_nosave(void); 289 void __init acpi_nvs_nosave_s3(void); 290 #endif /* CONFIG_PM_SLEEP */ 291 292 struct acpi_osc_context { 293 char *uuid_str; /* uuid string */ 294 int rev; 295 struct acpi_buffer cap; /* arg2/arg3 */ 296 struct acpi_buffer ret; /* free by caller if success */ 297 }; 298 299 #define OSC_QUERY_TYPE 0 300 #define OSC_SUPPORT_TYPE 1 301 #define OSC_CONTROL_TYPE 2 302 303 /* _OSC DW0 Definition */ 304 #define OSC_QUERY_ENABLE 1 305 #define OSC_REQUEST_ERROR 2 306 #define OSC_INVALID_UUID_ERROR 4 307 #define OSC_INVALID_REVISION_ERROR 8 308 #define OSC_CAPABILITIES_MASK_ERROR 16 309 310 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context); 311 312 /* platform-wide _OSC bits */ 313 #define OSC_SB_PAD_SUPPORT 1 314 #define OSC_SB_PPC_OST_SUPPORT 2 315 #define OSC_SB_PR3_SUPPORT 4 316 #define OSC_SB_HOTPLUG_OST_SUPPORT 8 317 #define OSC_SB_APEI_SUPPORT 16 318 319 extern bool osc_sb_apei_support_acked; 320 321 /* PCI defined _OSC bits */ 322 /* _OSC DW1 Definition (OS Support Fields) */ 323 #define OSC_EXT_PCI_CONFIG_SUPPORT 1 324 #define OSC_ACTIVE_STATE_PWR_SUPPORT 2 325 #define OSC_CLOCK_PWR_CAPABILITY_SUPPORT 4 326 #define OSC_PCI_SEGMENT_GROUPS_SUPPORT 8 327 #define OSC_MSI_SUPPORT 16 328 #define OSC_PCI_SUPPORT_MASKS 0x1f 329 330 /* _OSC DW1 Definition (OS Control Fields) */ 331 #define OSC_PCI_EXPRESS_NATIVE_HP_CONTROL 1 332 #define OSC_SHPC_NATIVE_HP_CONTROL 2 333 #define OSC_PCI_EXPRESS_PME_CONTROL 4 334 #define OSC_PCI_EXPRESS_AER_CONTROL 8 335 #define OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL 16 336 337 #define OSC_PCI_CONTROL_MASKS (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | \ 338 OSC_SHPC_NATIVE_HP_CONTROL | \ 339 OSC_PCI_EXPRESS_PME_CONTROL | \ 340 OSC_PCI_EXPRESS_AER_CONTROL | \ 341 OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL) 342 343 #define OSC_PCI_NATIVE_HOTPLUG (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | \ 344 OSC_SHPC_NATIVE_HP_CONTROL) 345 346 extern acpi_status acpi_pci_osc_control_set(acpi_handle handle, 347 u32 *mask, u32 req); 348 349 /* Enable _OST when all relevant hotplug operations are enabled */ 350 #if defined(CONFIG_ACPI_HOTPLUG_CPU) && \ 351 (defined(CONFIG_ACPI_HOTPLUG_MEMORY) || \ 352 defined(CONFIG_ACPI_HOTPLUG_MEMORY_MODULE)) && \ 353 (defined(CONFIG_ACPI_CONTAINER) || \ 354 defined(CONFIG_ACPI_CONTAINER_MODULE)) 355 #define ACPI_HOTPLUG_OST 356 #endif 357 358 /* _OST Source Event Code (OSPM Action) */ 359 #define ACPI_OST_EC_OSPM_SHUTDOWN 0x100 360 #define ACPI_OST_EC_OSPM_EJECT 0x103 361 #define ACPI_OST_EC_OSPM_INSERTION 0x200 362 363 /* _OST General Processing Status Code */ 364 #define ACPI_OST_SC_SUCCESS 0x0 365 #define ACPI_OST_SC_NON_SPECIFIC_FAILURE 0x1 366 #define ACPI_OST_SC_UNRECOGNIZED_NOTIFY 0x2 367 368 /* _OST OS Shutdown Processing (0x100) Status Code */ 369 #define ACPI_OST_SC_OS_SHUTDOWN_DENIED 0x80 370 #define ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS 0x81 371 #define ACPI_OST_SC_OS_SHUTDOWN_COMPLETED 0x82 372 #define ACPI_OST_SC_OS_SHUTDOWN_NOT_SUPPORTED 0x83 373 374 /* _OST Ejection Request (0x3, 0x103) Status Code */ 375 #define ACPI_OST_SC_EJECT_NOT_SUPPORTED 0x80 376 #define ACPI_OST_SC_DEVICE_IN_USE 0x81 377 #define ACPI_OST_SC_DEVICE_BUSY 0x82 378 #define ACPI_OST_SC_EJECT_DEPENDENCY_BUSY 0x83 379 #define ACPI_OST_SC_EJECT_IN_PROGRESS 0x84 380 381 /* _OST Insertion Request (0x200) Status Code */ 382 #define ACPI_OST_SC_INSERT_IN_PROGRESS 0x80 383 #define ACPI_OST_SC_DRIVER_LOAD_FAILURE 0x81 384 #define ACPI_OST_SC_INSERT_NOT_SUPPORTED 0x82 385 386 extern void acpi_early_init(void); 387 388 extern int acpi_nvs_register(__u64 start, __u64 size); 389 390 extern int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *), 391 void *data); 392 393 const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, 394 const struct device *dev); 395 396 static inline bool acpi_driver_match_device(struct device *dev, 397 const struct device_driver *drv) 398 { 399 return !!acpi_match_device(drv->acpi_match_table, dev); 400 } 401 402 #define ACPI_PTR(_ptr) (_ptr) 403 404 #else /* !CONFIG_ACPI */ 405 406 #define acpi_disabled 1 407 408 static inline void acpi_early_init(void) { } 409 410 static inline int early_acpi_boot_init(void) 411 { 412 return 0; 413 } 414 static inline int acpi_boot_init(void) 415 { 416 return 0; 417 } 418 419 static inline void acpi_boot_table_init(void) 420 { 421 return; 422 } 423 424 static inline int acpi_mps_check(void) 425 { 426 return 0; 427 } 428 429 static inline int acpi_check_resource_conflict(struct resource *res) 430 { 431 return 0; 432 } 433 434 static inline int acpi_check_region(resource_size_t start, resource_size_t n, 435 const char *name) 436 { 437 return 0; 438 } 439 440 struct acpi_table_header; 441 static inline int acpi_table_parse(char *id, 442 int (*handler)(struct acpi_table_header *)) 443 { 444 return -1; 445 } 446 447 static inline int acpi_nvs_register(__u64 start, __u64 size) 448 { 449 return 0; 450 } 451 452 static inline int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *), 453 void *data) 454 { 455 return 0; 456 } 457 458 struct acpi_device_id; 459 460 static inline const struct acpi_device_id *acpi_match_device( 461 const struct acpi_device_id *ids, const struct device *dev) 462 { 463 return NULL; 464 } 465 466 static inline bool acpi_driver_match_device(struct device *dev, 467 const struct device_driver *drv) 468 { 469 return false; 470 } 471 472 #define ACPI_PTR(_ptr) (NULL) 473 474 #endif /* !CONFIG_ACPI */ 475 476 #ifdef CONFIG_ACPI 477 void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, 478 u32 pm1a_ctrl, u32 pm1b_ctrl)); 479 480 acpi_status acpi_os_prepare_sleep(u8 sleep_state, 481 u32 pm1a_control, u32 pm1b_control); 482 #else 483 #define acpi_os_set_prepare_sleep(func, pm1a_ctrl, pm1b_ctrl) do { } while (0) 484 #endif 485 486 #if defined(CONFIG_ACPI) && defined(CONFIG_PM_RUNTIME) 487 int acpi_dev_runtime_suspend(struct device *dev); 488 int acpi_dev_runtime_resume(struct device *dev); 489 int acpi_subsys_runtime_suspend(struct device *dev); 490 int acpi_subsys_runtime_resume(struct device *dev); 491 #else 492 static inline int acpi_dev_runtime_suspend(struct device *dev) { return 0; } 493 static inline int acpi_dev_runtime_resume(struct device *dev) { return 0; } 494 static inline int acpi_subsys_runtime_suspend(struct device *dev) { return 0; } 495 static inline int acpi_subsys_runtime_resume(struct device *dev) { return 0; } 496 #endif 497 498 #ifdef CONFIG_ACPI_SLEEP 499 int acpi_dev_suspend_late(struct device *dev); 500 int acpi_dev_resume_early(struct device *dev); 501 int acpi_subsys_prepare(struct device *dev); 502 int acpi_subsys_suspend_late(struct device *dev); 503 int acpi_subsys_resume_early(struct device *dev); 504 #else 505 static inline int acpi_dev_suspend_late(struct device *dev) { return 0; } 506 static inline int acpi_dev_resume_early(struct device *dev) { return 0; } 507 static inline int acpi_subsys_prepare(struct device *dev) { return 0; } 508 static inline int acpi_subsys_suspend_late(struct device *dev) { return 0; } 509 static inline int acpi_subsys_resume_early(struct device *dev) { return 0; } 510 #endif 511 512 #if defined(CONFIG_ACPI) && defined(CONFIG_PM) 513 int acpi_dev_pm_attach(struct device *dev, bool power_on); 514 void acpi_dev_pm_detach(struct device *dev, bool power_off); 515 #else 516 static inline int acpi_dev_pm_attach(struct device *dev, bool power_on) 517 { 518 return -ENODEV; 519 } 520 static inline void acpi_dev_pm_detach(struct device *dev, bool power_off) {} 521 #endif 522 523 #ifdef CONFIG_ACPI 524 __printf(3, 4) 525 void acpi_handle_printk(const char *level, acpi_handle handle, 526 const char *fmt, ...); 527 #else /* !CONFIG_ACPI */ 528 static inline __printf(3, 4) void 529 acpi_handle_printk(const char *level, void *handle, const char *fmt, ...) {} 530 #endif /* !CONFIG_ACPI */ 531 532 /* 533 * acpi_handle_<level>: Print message with ACPI prefix and object path 534 * 535 * These interfaces acquire the global namespace mutex to obtain an object 536 * path. In interrupt context, it shows the object path as <n/a>. 537 */ 538 #define acpi_handle_emerg(handle, fmt, ...) \ 539 acpi_handle_printk(KERN_EMERG, handle, fmt, ##__VA_ARGS__) 540 #define acpi_handle_alert(handle, fmt, ...) \ 541 acpi_handle_printk(KERN_ALERT, handle, fmt, ##__VA_ARGS__) 542 #define acpi_handle_crit(handle, fmt, ...) \ 543 acpi_handle_printk(KERN_CRIT, handle, fmt, ##__VA_ARGS__) 544 #define acpi_handle_err(handle, fmt, ...) \ 545 acpi_handle_printk(KERN_ERR, handle, fmt, ##__VA_ARGS__) 546 #define acpi_handle_warn(handle, fmt, ...) \ 547 acpi_handle_printk(KERN_WARNING, handle, fmt, ##__VA_ARGS__) 548 #define acpi_handle_notice(handle, fmt, ...) \ 549 acpi_handle_printk(KERN_NOTICE, handle, fmt, ##__VA_ARGS__) 550 #define acpi_handle_info(handle, fmt, ...) \ 551 acpi_handle_printk(KERN_INFO, handle, fmt, ##__VA_ARGS__) 552 553 /* REVISIT: Support CONFIG_DYNAMIC_DEBUG when necessary */ 554 #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG) 555 #define acpi_handle_debug(handle, fmt, ...) \ 556 acpi_handle_printk(KERN_DEBUG, handle, fmt, ##__VA_ARGS__) 557 #else 558 #define acpi_handle_debug(handle, fmt, ...) \ 559 ({ \ 560 if (0) \ 561 acpi_handle_printk(KERN_DEBUG, handle, fmt, ##__VA_ARGS__); \ 562 0; \ 563 }) 564 #endif 565 566 #endif /*_LINUX_ACPI_H*/ 567