1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_SUSPEND_H 3 #define _LINUX_SUSPEND_H 4 5 #include <linux/swap.h> 6 #include <linux/notifier.h> 7 #include <linux/init.h> 8 #include <linux/pm.h> 9 #include <linux/mm.h> 10 #include <linux/freezer.h> 11 #include <asm/errno.h> 12 13 #ifdef CONFIG_VT 14 extern void pm_set_vt_switch(int); 15 #else 16 static inline void pm_set_vt_switch(int do_switch) 17 { 18 } 19 #endif 20 21 #ifdef CONFIG_VT_CONSOLE_SLEEP 22 extern void pm_prepare_console(void); 23 extern void pm_restore_console(void); 24 #else 25 static inline void pm_prepare_console(void) 26 { 27 } 28 29 static inline void pm_restore_console(void) 30 { 31 } 32 #endif 33 34 typedef int __bitwise suspend_state_t; 35 36 #define PM_SUSPEND_ON ((__force suspend_state_t) 0) 37 #define PM_SUSPEND_TO_IDLE ((__force suspend_state_t) 1) 38 #define PM_SUSPEND_STANDBY ((__force suspend_state_t) 2) 39 #define PM_SUSPEND_MEM ((__force suspend_state_t) 3) 40 #define PM_SUSPEND_MIN PM_SUSPEND_TO_IDLE 41 #define PM_SUSPEND_MAX ((__force suspend_state_t) 4) 42 43 /** 44 * struct platform_suspend_ops - Callbacks for managing platform dependent 45 * system sleep states. 46 * 47 * @valid: Callback to determine if given system sleep state is supported by 48 * the platform. 49 * Valid (ie. supported) states are advertised in /sys/power/state. Note 50 * that it still may be impossible to enter given system sleep state if the 51 * conditions aren't right. 52 * There is the %suspend_valid_only_mem function available that can be 53 * assigned to this if the platform only supports mem sleep. 54 * 55 * @begin: Initialise a transition to given system sleep state. 56 * @begin() is executed right prior to suspending devices. The information 57 * conveyed to the platform code by @begin() should be disregarded by it as 58 * soon as @end() is executed. If @begin() fails (ie. returns nonzero), 59 * @prepare(), @enter() and @finish() will not be called by the PM core. 60 * This callback is optional. However, if it is implemented, the argument 61 * passed to @enter() is redundant and should be ignored. 62 * 63 * @prepare: Prepare the platform for entering the system sleep state indicated 64 * by @begin(). 65 * @prepare() is called right after devices have been suspended (ie. the 66 * appropriate .suspend() method has been executed for each device) and 67 * before device drivers' late suspend callbacks are executed. It returns 68 * 0 on success or a negative error code otherwise, in which case the 69 * system cannot enter the desired sleep state (@prepare_late(), @enter(), 70 * and @wake() will not be called in that case). 71 * 72 * @prepare_late: Finish preparing the platform for entering the system sleep 73 * state indicated by @begin(). 74 * @prepare_late is called before disabling nonboot CPUs and after 75 * device drivers' late suspend callbacks have been executed. It returns 76 * 0 on success or a negative error code otherwise, in which case the 77 * system cannot enter the desired sleep state (@enter() will not be 78 * executed). 79 * 80 * @enter: Enter the system sleep state indicated by @begin() or represented by 81 * the argument if @begin() is not implemented. 82 * This callback is mandatory. It returns 0 on success or a negative 83 * error code otherwise, in which case the system cannot enter the desired 84 * sleep state. 85 * 86 * @wake: Called when the system has just left a sleep state, right after 87 * the nonboot CPUs have been enabled and before device drivers' early 88 * resume callbacks are executed. 89 * This callback is optional, but should be implemented by the platforms 90 * that implement @prepare_late(). If implemented, it is always called 91 * after @prepare_late and @enter(), even if one of them fails. 92 * 93 * @finish: Finish wake-up of the platform. 94 * @finish is called right prior to calling device drivers' regular suspend 95 * callbacks. 96 * This callback is optional, but should be implemented by the platforms 97 * that implement @prepare(). If implemented, it is always called after 98 * @enter() and @wake(), even if any of them fails. It is executed after 99 * a failing @prepare. 100 * 101 * @suspend_again: Returns whether the system should suspend again (true) or 102 * not (false). If the platform wants to poll sensors or execute some 103 * code during suspended without invoking userspace and most of devices, 104 * suspend_again callback is the place assuming that periodic-wakeup or 105 * alarm-wakeup is already setup. This allows to execute some codes while 106 * being kept suspended in the view of userland and devices. 107 * 108 * @end: Called by the PM core right after resuming devices, to indicate to 109 * the platform that the system has returned to the working state or 110 * the transition to the sleep state has been aborted. 111 * This callback is optional, but should be implemented by the platforms 112 * that implement @begin(). Accordingly, platforms implementing @begin() 113 * should also provide a @end() which cleans up transitions aborted before 114 * @enter(). 115 * 116 * @recover: Recover the platform from a suspend failure. 117 * Called by the PM core if the suspending of devices fails. 118 * This callback is optional and should only be implemented by platforms 119 * which require special recovery actions in that situation. 120 */ 121 struct platform_suspend_ops { 122 int (*valid)(suspend_state_t state); 123 int (*begin)(suspend_state_t state); 124 int (*prepare)(void); 125 int (*prepare_late)(void); 126 int (*enter)(suspend_state_t state); 127 void (*wake)(void); 128 void (*finish)(void); 129 bool (*suspend_again)(void); 130 void (*end)(void); 131 void (*recover)(void); 132 }; 133 134 struct platform_s2idle_ops { 135 int (*begin)(void); 136 int (*prepare)(void); 137 int (*prepare_late)(void); 138 void (*check)(void); 139 bool (*wake)(void); 140 void (*restore_early)(void); 141 void (*restore)(void); 142 void (*end)(void); 143 }; 144 145 #ifdef CONFIG_SUSPEND 146 extern suspend_state_t pm_suspend_target_state; 147 extern suspend_state_t mem_sleep_current; 148 extern suspend_state_t mem_sleep_default; 149 150 /** 151 * suspend_set_ops - set platform dependent suspend operations 152 * @ops: The new suspend operations to set. 153 */ 154 extern void suspend_set_ops(const struct platform_suspend_ops *ops); 155 extern int suspend_valid_only_mem(suspend_state_t state); 156 157 extern unsigned int pm_suspend_global_flags; 158 159 #define PM_SUSPEND_FLAG_FW_SUSPEND BIT(0) 160 #define PM_SUSPEND_FLAG_FW_RESUME BIT(1) 161 #define PM_SUSPEND_FLAG_NO_PLATFORM BIT(2) 162 163 static inline void pm_suspend_clear_flags(void) 164 { 165 pm_suspend_global_flags = 0; 166 } 167 168 static inline void pm_set_suspend_via_firmware(void) 169 { 170 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND; 171 } 172 173 static inline void pm_set_resume_via_firmware(void) 174 { 175 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME; 176 } 177 178 static inline void pm_set_suspend_no_platform(void) 179 { 180 pm_suspend_global_flags |= PM_SUSPEND_FLAG_NO_PLATFORM; 181 } 182 183 /** 184 * pm_suspend_via_firmware - Check if platform firmware will suspend the system. 185 * 186 * To be called during system-wide power management transitions to sleep states 187 * or during the subsequent system-wide transitions back to the working state. 188 * 189 * Return 'true' if the platform firmware is going to be invoked at the end of 190 * the system-wide power management transition (to a sleep state) in progress in 191 * order to complete it, or if the platform firmware has been invoked in order 192 * to complete the last (or preceding) transition of the system to a sleep 193 * state. 194 * 195 * This matters if the caller needs or wants to carry out some special actions 196 * depending on whether or not control will be passed to the platform firmware 197 * subsequently (for example, the device may need to be reset before letting the 198 * platform firmware manipulate it, which is not necessary when the platform 199 * firmware is not going to be invoked) or when such special actions may have 200 * been carried out during the preceding transition of the system to a sleep 201 * state (as they may need to be taken into account). 202 */ 203 static inline bool pm_suspend_via_firmware(void) 204 { 205 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND); 206 } 207 208 /** 209 * pm_resume_via_firmware - Check if platform firmware has woken up the system. 210 * 211 * To be called during system-wide power management transitions from sleep 212 * states. 213 * 214 * Return 'true' if the platform firmware has passed control to the kernel at 215 * the beginning of the system-wide power management transition in progress, so 216 * the event that woke up the system from sleep has been handled by the platform 217 * firmware. 218 */ 219 static inline bool pm_resume_via_firmware(void) 220 { 221 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME); 222 } 223 224 /** 225 * pm_suspend_no_platform - Check if platform may change device power states. 226 * 227 * To be called during system-wide power management transitions to sleep states 228 * or during the subsequent system-wide transitions back to the working state. 229 * 230 * Return 'true' if the power states of devices remain under full control of the 231 * kernel throughout the system-wide suspend and resume cycle in progress (that 232 * is, if a device is put into a certain power state during suspend, it can be 233 * expected to remain in that state during resume). 234 */ 235 static inline bool pm_suspend_no_platform(void) 236 { 237 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_NO_PLATFORM); 238 } 239 240 /* Suspend-to-idle state machnine. */ 241 enum s2idle_states { 242 S2IDLE_STATE_NONE, /* Not suspended/suspending. */ 243 S2IDLE_STATE_ENTER, /* Enter suspend-to-idle. */ 244 S2IDLE_STATE_WAKE, /* Wake up from suspend-to-idle. */ 245 }; 246 247 extern enum s2idle_states __read_mostly s2idle_state; 248 249 static inline bool idle_should_enter_s2idle(void) 250 { 251 return unlikely(s2idle_state == S2IDLE_STATE_ENTER); 252 } 253 254 extern bool pm_suspend_default_s2idle(void); 255 extern void __init pm_states_init(void); 256 extern void s2idle_set_ops(const struct platform_s2idle_ops *ops); 257 extern void s2idle_wake(void); 258 259 /** 260 * arch_suspend_disable_irqs - disable IRQs for suspend 261 * 262 * Disables IRQs (in the default case). This is a weak symbol in the common 263 * code and thus allows architectures to override it if more needs to be 264 * done. Not called for suspend to disk. 265 */ 266 extern void arch_suspend_disable_irqs(void); 267 268 /** 269 * arch_suspend_enable_irqs - enable IRQs after suspend 270 * 271 * Enables IRQs (in the default case). This is a weak symbol in the common 272 * code and thus allows architectures to override it if more needs to be 273 * done. Not called for suspend to disk. 274 */ 275 extern void arch_suspend_enable_irqs(void); 276 277 extern int pm_suspend(suspend_state_t state); 278 extern bool sync_on_suspend_enabled; 279 #else /* !CONFIG_SUSPEND */ 280 #define suspend_valid_only_mem NULL 281 282 #define pm_suspend_target_state (PM_SUSPEND_ON) 283 284 static inline void pm_suspend_clear_flags(void) {} 285 static inline void pm_set_suspend_via_firmware(void) {} 286 static inline void pm_set_resume_via_firmware(void) {} 287 static inline bool pm_suspend_via_firmware(void) { return false; } 288 static inline bool pm_resume_via_firmware(void) { return false; } 289 static inline bool pm_suspend_no_platform(void) { return false; } 290 static inline bool pm_suspend_default_s2idle(void) { return false; } 291 292 static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {} 293 static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } 294 static inline bool sync_on_suspend_enabled(void) { return true; } 295 static inline bool idle_should_enter_s2idle(void) { return false; } 296 static inline void __init pm_states_init(void) {} 297 static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {} 298 static inline void s2idle_wake(void) {} 299 #endif /* !CONFIG_SUSPEND */ 300 301 static inline bool pm_suspend_in_progress(void) 302 { 303 return pm_suspend_target_state != PM_SUSPEND_ON; 304 } 305 306 /* struct pbe is used for creating lists of pages that should be restored 307 * atomically during the resume from disk, because the page frames they have 308 * occupied before the suspend are in use. 309 */ 310 struct pbe { 311 void *address; /* address of the copy */ 312 void *orig_address; /* original address of a page */ 313 struct pbe *next; 314 }; 315 316 /** 317 * struct platform_hibernation_ops - hibernation platform support 318 * 319 * The methods in this structure allow a platform to carry out special 320 * operations required by it during a hibernation transition. 321 * 322 * All the methods below, except for @recover(), must be implemented. 323 * 324 * @begin: Tell the platform driver that we're starting hibernation. 325 * Called right after shrinking memory and before freezing devices. 326 * 327 * @end: Called by the PM core right after resuming devices, to indicate to 328 * the platform that the system has returned to the working state. 329 * 330 * @pre_snapshot: Prepare the platform for creating the hibernation image. 331 * Called right after devices have been frozen and before the nonboot 332 * CPUs are disabled (runs with IRQs on). 333 * 334 * @finish: Restore the previous state of the platform after the hibernation 335 * image has been created *or* put the platform into the normal operation 336 * mode after the hibernation (the same method is executed in both cases). 337 * Called right after the nonboot CPUs have been enabled and before 338 * thawing devices (runs with IRQs on). 339 * 340 * @prepare: Prepare the platform for entering the low power state. 341 * Called right after the hibernation image has been saved and before 342 * devices are prepared for entering the low power state. 343 * 344 * @enter: Put the system into the low power state after the hibernation image 345 * has been saved to disk. 346 * Called after the nonboot CPUs have been disabled and all of the low 347 * level devices have been shut down (runs with IRQs off). 348 * 349 * @leave: Perform the first stage of the cleanup after the system sleep state 350 * indicated by @set_target() has been left. 351 * Called right after the control has been passed from the boot kernel to 352 * the image kernel, before the nonboot CPUs are enabled and before devices 353 * are resumed. Executed with interrupts disabled. 354 * 355 * @pre_restore: Prepare system for the restoration from a hibernation image. 356 * Called right after devices have been frozen and before the nonboot 357 * CPUs are disabled (runs with IRQs on). 358 * 359 * @restore_cleanup: Clean up after a failing image restoration. 360 * Called right after the nonboot CPUs have been enabled and before 361 * thawing devices (runs with IRQs on). 362 * 363 * @recover: Recover the platform from a failure to suspend devices. 364 * Called by the PM core if the suspending of devices during hibernation 365 * fails. This callback is optional and should only be implemented by 366 * platforms which require special recovery actions in that situation. 367 */ 368 struct platform_hibernation_ops { 369 int (*begin)(pm_message_t stage); 370 void (*end)(void); 371 int (*pre_snapshot)(void); 372 void (*finish)(void); 373 int (*prepare)(void); 374 int (*enter)(void); 375 void (*leave)(void); 376 int (*pre_restore)(void); 377 void (*restore_cleanup)(void); 378 void (*recover)(void); 379 }; 380 381 #ifdef CONFIG_HIBERNATION 382 /* kernel/power/snapshot.c */ 383 extern void register_nosave_region(unsigned long b, unsigned long e); 384 extern int swsusp_page_is_forbidden(struct page *); 385 extern void swsusp_set_page_free(struct page *); 386 extern void swsusp_unset_page_free(struct page *); 387 extern unsigned long get_safe_page(gfp_t gfp_mask); 388 extern asmlinkage int swsusp_arch_suspend(void); 389 extern asmlinkage int swsusp_arch_resume(void); 390 391 extern u32 swsusp_hardware_signature; 392 extern void hibernation_set_ops(const struct platform_hibernation_ops *ops); 393 extern int hibernate(void); 394 extern bool system_entering_hibernation(void); 395 extern bool hibernation_available(void); 396 asmlinkage int swsusp_save(void); 397 extern struct pbe *restore_pblist; 398 int pfn_is_nosave(unsigned long pfn); 399 400 int hibernate_quiet_exec(int (*func)(void *data), void *data); 401 int hibernate_resume_nonboot_cpu_disable(void); 402 int arch_hibernation_header_save(void *addr, unsigned int max_size); 403 int arch_hibernation_header_restore(void *addr); 404 405 #else /* CONFIG_HIBERNATION */ 406 static inline void register_nosave_region(unsigned long b, unsigned long e) {} 407 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } 408 static inline void swsusp_set_page_free(struct page *p) {} 409 static inline void swsusp_unset_page_free(struct page *p) {} 410 411 static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {} 412 static inline int hibernate(void) { return -ENOSYS; } 413 static inline bool system_entering_hibernation(void) { return false; } 414 static inline bool hibernation_available(void) { return false; } 415 416 static inline int hibernate_quiet_exec(int (*func)(void *data), void *data) { 417 return -ENOTSUPP; 418 } 419 #endif /* CONFIG_HIBERNATION */ 420 421 int arch_resume_nosmt(void); 422 423 #ifdef CONFIG_HIBERNATION_SNAPSHOT_DEV 424 int is_hibernate_resume_dev(dev_t dev); 425 #else 426 static inline int is_hibernate_resume_dev(dev_t dev) { return 0; } 427 #endif 428 429 /* Hibernation and suspend events */ 430 #define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */ 431 #define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */ 432 #define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */ 433 #define PM_POST_SUSPEND 0x0004 /* Suspend finished */ 434 #define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */ 435 #define PM_POST_RESTORE 0x0006 /* Restore failed */ 436 437 extern struct mutex system_transition_mutex; 438 439 #ifdef CONFIG_PM_SLEEP 440 void save_processor_state(void); 441 void restore_processor_state(void); 442 443 /* kernel/power/main.c */ 444 extern int register_pm_notifier(struct notifier_block *nb); 445 extern int unregister_pm_notifier(struct notifier_block *nb); 446 extern void ksys_sync_helper(void); 447 extern void pm_report_hw_sleep_time(u64 t); 448 extern void pm_report_max_hw_sleep(u64 t); 449 void pm_restrict_gfp_mask(void); 450 void pm_restore_gfp_mask(void); 451 452 #define pm_notifier(fn, pri) { \ 453 static struct notifier_block fn##_nb = \ 454 { .notifier_call = fn, .priority = pri }; \ 455 register_pm_notifier(&fn##_nb); \ 456 } 457 458 /* drivers/base/power/wakeup.c */ 459 extern bool events_check_enabled; 460 461 static inline bool pm_suspended_storage(void) 462 { 463 return !gfp_has_io_fs(gfp_allowed_mask); 464 } 465 466 extern bool pm_wakeup_pending(void); 467 extern void pm_system_wakeup(void); 468 extern void pm_system_cancel_wakeup(void); 469 extern void pm_wakeup_clear(unsigned int irq_number); 470 extern void pm_system_irq_wakeup(unsigned int irq_number); 471 extern unsigned int pm_wakeup_irq(void); 472 extern bool pm_get_wakeup_count(unsigned int *count, bool block); 473 extern bool pm_save_wakeup_count(unsigned int count); 474 extern void pm_wakep_autosleep_enabled(bool set); 475 extern void pm_print_active_wakeup_sources(void); 476 477 extern unsigned int lock_system_sleep(void); 478 extern void unlock_system_sleep(unsigned int); 479 480 extern bool pm_sleep_transition_in_progress(void); 481 bool pm_hibernate_is_recovering(void); 482 483 #else /* !CONFIG_PM_SLEEP */ 484 485 static inline int register_pm_notifier(struct notifier_block *nb) 486 { 487 return 0; 488 } 489 490 static inline int unregister_pm_notifier(struct notifier_block *nb) 491 { 492 return 0; 493 } 494 495 static inline void pm_report_hw_sleep_time(u64 t) {}; 496 static inline void pm_report_max_hw_sleep(u64 t) {}; 497 498 static inline void pm_restrict_gfp_mask(void) {} 499 static inline void pm_restore_gfp_mask(void) {} 500 501 static inline void ksys_sync_helper(void) {} 502 503 #define pm_notifier(fn, pri) do { (void)(fn); } while (0) 504 505 static inline bool pm_suspended_storage(void) { return false; } 506 static inline bool pm_wakeup_pending(void) { return false; } 507 static inline void pm_system_wakeup(void) {} 508 static inline void pm_wakeup_clear(bool reset) {} 509 static inline void pm_system_irq_wakeup(unsigned int irq_number) {} 510 511 static inline unsigned int lock_system_sleep(void) { return 0; } 512 static inline void unlock_system_sleep(unsigned int flags) {} 513 514 static inline bool pm_sleep_transition_in_progress(void) { return false; } 515 static inline bool pm_hibernate_is_recovering(void) { return false; } 516 517 #endif /* !CONFIG_PM_SLEEP */ 518 519 #ifdef CONFIG_PM_SLEEP_DEBUG 520 extern bool pm_print_times_enabled; 521 extern bool pm_debug_messages_on; 522 extern bool pm_debug_messages_should_print(void); 523 static inline int pm_dyn_debug_messages_on(void) 524 { 525 #ifdef CONFIG_DYNAMIC_DEBUG 526 return 1; 527 #else 528 return 0; 529 #endif 530 } 531 #ifndef pr_fmt 532 #define pr_fmt(fmt) "PM: " fmt 533 #endif 534 #define __pm_pr_dbg(fmt, ...) \ 535 do { \ 536 if (pm_debug_messages_should_print()) \ 537 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ 538 else if (pm_dyn_debug_messages_on()) \ 539 pr_debug(fmt, ##__VA_ARGS__); \ 540 } while (0) 541 #define __pm_deferred_pr_dbg(fmt, ...) \ 542 do { \ 543 if (pm_debug_messages_should_print()) \ 544 printk_deferred(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ 545 } while (0) 546 #else 547 #define pm_print_times_enabled (false) 548 #define pm_debug_messages_on (false) 549 550 #include <linux/printk.h> 551 552 #define __pm_pr_dbg(fmt, ...) \ 553 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 554 #define __pm_deferred_pr_dbg(fmt, ...) \ 555 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 556 #endif 557 558 /** 559 * pm_pr_dbg - print pm sleep debug messages 560 * 561 * If pm_debug_messages_on is enabled and the system is entering/leaving 562 * suspend, print message. 563 * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is enabled, 564 * print message only from instances explicitly enabled on dynamic debug's 565 * control. 566 * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is disabled, 567 * don't print message. 568 */ 569 #define pm_pr_dbg(fmt, ...) \ 570 __pm_pr_dbg(fmt, ##__VA_ARGS__) 571 572 #define pm_deferred_pr_dbg(fmt, ...) \ 573 __pm_deferred_pr_dbg(fmt, ##__VA_ARGS__) 574 575 #ifdef CONFIG_PM_AUTOSLEEP 576 577 /* kernel/power/autosleep.c */ 578 void queue_up_suspend_work(void); 579 580 #else /* !CONFIG_PM_AUTOSLEEP */ 581 582 static inline void queue_up_suspend_work(void) {} 583 584 #endif /* !CONFIG_PM_AUTOSLEEP */ 585 586 enum suspend_stat_step { 587 SUSPEND_WORKING = 0, 588 SUSPEND_FREEZE, 589 SUSPEND_PREPARE, 590 SUSPEND_SUSPEND, 591 SUSPEND_SUSPEND_LATE, 592 SUSPEND_SUSPEND_NOIRQ, 593 SUSPEND_RESUME_NOIRQ, 594 SUSPEND_RESUME_EARLY, 595 SUSPEND_RESUME 596 }; 597 598 void dpm_save_failed_dev(const char *name); 599 void dpm_save_failed_step(enum suspend_stat_step step); 600 601 #endif /* _LINUX_SUSPEND_H */ 602