| cpuidle.c (82ffd0454bd9bd57780966d47bfd56d579dd4fb3) | cpuidle.c (6f9b83ac877fb5558d76b9f78590f3afd1bdf421) |
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| 1/* 2 * cpuidle.c - core cpuidle infrastructure 3 * 4 * (C) 2006-2007 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> 5 * Shaohua Li <shaohua.li@intel.com> 6 * Adam Belay <abelay@novell.com> 7 * 8 * This code is licenced under the GPL. --- 314 unchanged lines hidden (view full) --- 323 * @index: the index in the idle state table 324 * 325 * Returns the index in the idle state, < 0 in case of error. 326 * The error code depends on the backend driver 327 */ 328int cpuidle_enter(struct cpuidle_driver *drv, struct cpuidle_device *dev, 329 int index) 330{ | 1/* 2 * cpuidle.c - core cpuidle infrastructure 3 * 4 * (C) 2006-2007 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> 5 * Shaohua Li <shaohua.li@intel.com> 6 * Adam Belay <abelay@novell.com> 7 * 8 * This code is licenced under the GPL. --- 314 unchanged lines hidden (view full) --- 323 * @index: the index in the idle state table 324 * 325 * Returns the index in the idle state, < 0 in case of error. 326 * The error code depends on the backend driver 327 */ 328int cpuidle_enter(struct cpuidle_driver *drv, struct cpuidle_device *dev, 329 int index) 330{ |
| 331 int ret = 0; 332 333 /* 334 * Store the next hrtimer, which becomes either next tick or the next 335 * timer event, whatever expires first. Additionally, to make this data 336 * useful for consumers outside cpuidle, we rely on that the governor's 337 * ->select() callback have decided, whether to stop the tick or not. 338 */ 339 WRITE_ONCE(dev->next_hrtimer, tick_nohz_get_next_hrtimer()); 340 |
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| 331 if (cpuidle_state_is_coupled(drv, index)) | 341 if (cpuidle_state_is_coupled(drv, index)) |
| 332 return cpuidle_enter_state_coupled(dev, drv, index); 333 return cpuidle_enter_state(dev, drv, index); | 342 ret = cpuidle_enter_state_coupled(dev, drv, index); 343 else 344 ret = cpuidle_enter_state(dev, drv, index); 345 346 WRITE_ONCE(dev->next_hrtimer, 0); 347 return ret; |
| 334} 335 336/** 337 * cpuidle_reflect - tell the underlying governor what was the state 338 * we were in 339 * 340 * @dev : the cpuidle device 341 * @index: the index in the idle state table --- 164 unchanged lines hidden (view full) --- 506 507 dev->registered = 0; 508} 509 510static void __cpuidle_device_init(struct cpuidle_device *dev) 511{ 512 memset(dev->states_usage, 0, sizeof(dev->states_usage)); 513 dev->last_residency = 0; | 348} 349 350/** 351 * cpuidle_reflect - tell the underlying governor what was the state 352 * we were in 353 * 354 * @dev : the cpuidle device 355 * @index: the index in the idle state table --- 164 unchanged lines hidden (view full) --- 520 521 dev->registered = 0; 522} 523 524static void __cpuidle_device_init(struct cpuidle_device *dev) 525{ 526 memset(dev->states_usage, 0, sizeof(dev->states_usage)); 527 dev->last_residency = 0; |
| 528 dev->next_hrtimer = 0; |
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| 514} 515 516/** 517 * __cpuidle_register_device - internal register function called before register 518 * and enable routines 519 * @dev: the cpu 520 * 521 * cpuidle_lock mutex must be held before this is called --- 214 unchanged lines hidden --- | 529} 530 531/** 532 * __cpuidle_register_device - internal register function called before register 533 * and enable routines 534 * @dev: the cpu 535 * 536 * cpuidle_lock mutex must be held before this is called --- 214 unchanged lines hidden --- |