include/linux/interrupt.h

   1 /* interrupt.h */
   2 #ifndef _LINUX_INTERRUPT_H
   3 #define _LINUX_INTERRUPT_H
   4
   5 #include <linux/kernel.h>
   6 #include <linux/linkage.h>
   7 #include <linux/bitops.h>
   8 #include <linux/preempt.h>
   9 #include <linux/cpumask.h>
  10 #include <linux/irqreturn.h>
  11 #include <linux/irqnr.h>
  12 #include <linux/hardirq.h>
  13 #include <linux/sched.h>
  14 #include <linux/irqflags.h>
  15 #include <linux/smp.h>
  16 #include <linux/percpu.h>
  17 #include <linux/hrtimer.h>
  18
  19 #include <asm/atomic.h>
  20 #include <asm/ptrace.h>
  21 #include <asm/system.h>
  22
  23 /*
  24  * These correspond to the IORESOURCE_IRQ_* defines in
  25  * linux/ioport.h to select the interrupt line behaviour.  When
  26  * requesting an interrupt without specifying a IRQF_TRIGGER, the
  27  * setting should be assumed to be "as already configured", which
  28  * may be as per machine or firmware initialisation.
  29  */
  30 #define IRQF_TRIGGER_NONE       0x00000000
  31 #define IRQF_TRIGGER_RISING     0x00000001
  32 #define IRQF_TRIGGER_FALLING    0x00000002
  33 #define IRQF_TRIGGER_HIGH       0x00000004
  34 #define IRQF_TRIGGER_LOW        0x00000008
  35 #define IRQF_TRIGGER_MASK       (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW | \
  36                                  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)
  37 #define IRQF_TRIGGER_PROBE      0x00000010
  38
  39 /*
  40  * These flags used only by the kernel as part of the
  41  * irq handling routines.
  42  *
  43  * IRQF_DISABLED - keep irqs disabled when calling the action handler
  44  * IRQF_SAMPLE_RANDOM - irq is used to feed the random generator
  45  * IRQF_SHARED - allow sharing the irq among several devices
  46  * IRQF_PROBE_SHARED - set by callers when they expect sharing mismatches to occur
  47  * IRQF_TIMER - Flag to mark this interrupt as timer interrupt
  48  * IRQF_PERCPU - Interrupt is per cpu
  49  * IRQF_NOBALANCING - Flag to exclude this interrupt from irq balancing
  50  * IRQF_IRQPOLL - Interrupt is used for polling (only the interrupt that is
  51  *                registered first in an shared interrupt is considered for
  52  *                performance reasons)
  53  */
  54 #define IRQF_DISABLED           0x00000020
  55 #define IRQF_SAMPLE_RANDOM      0x00000040
  56 #define IRQF_SHARED             0x00000080
  57 #define IRQF_PROBE_SHARED       0x00000100
  58 #define IRQF_TIMER              0x00000200
  59 #define IRQF_PERCPU             0x00000400
  60 #define IRQF_NOBALANCING        0x00000800
  61 #define IRQF_IRQPOLL            0x00001000
  62
  63 /*
  64  * Bits used by threaded handlers:
  65  * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
  66  * IRQTF_DIED      - handler thread died
  67  * IRQTF_WARNED    - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
  68  * IRQTF_AFFINITY  - irq thread is requested to adjust affinity
  69  */
  70 enum {
  71         IRQTF_RUNTHREAD,
  72         IRQTF_DIED,
  73         IRQTF_WARNED,
  74         IRQTF_AFFINITY,
  75 };
  76
  77 typedef irqreturn_t (*irq_handler_t)(int, void *);
  78
  79 /**
  80  * struct irqaction - per interrupt action descriptor
  81  * @handler:    interrupt handler function
  82  * @flags:      flags (see IRQF_* above)
  83  * @mask:       no comment as it is useless and about to be removed
  84  * @name:       name of the device
  85  * @dev_id:     cookie to identify the device
  86  * @next:       pointer to the next irqaction for shared interrupts
  87  * @irq:        interrupt number
  88  * @dir:        pointer to the proc/irq/NN/name entry
  89  * @thread_fn:  interupt handler function for threaded interrupts
  90  * @thread:     thread pointer for threaded interrupts
  91  * @thread_flags:       flags related to @thread
  92  */
  93 struct irqaction {
  94         irq_handler_t handler;
  95         unsigned long flags;
  96         cpumask_t mask;
  97         const char *name;
  98         void *dev_id;
  99         struct irqaction *next;
 100         int irq;
 101         struct proc_dir_entry *dir;
 102         irq_handler_t thread_fn;
 103         struct task_struct *thread;
 104         unsigned long thread_flags;
 105 };
 106
 107 extern irqreturn_t no_action(int cpl, void *dev_id);
 108
 109 #ifdef CONFIG_GENERIC_HARDIRQS
 110 extern int __must_check
 111 request_threaded_irq(unsigned int irq, irq_handler_t handler,
 112                      irq_handler_t thread_fn,
 113                      unsigned long flags, const char *name, void *dev);
 114
 115 static inline int __must_check
 116 request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
 117             const char *name, void *dev)
 118 {
 119         return request_threaded_irq(irq, handler, NULL, flags, name, dev);
 120 }
 121
 122 extern void exit_irq_thread(void);
 123 #else
 124
 125 extern int __must_check
 126 request_irq(unsigned int irq, irq_handler_t handler, unsigned long flags,
 127             const char *name, void *dev);
 128
 129 /*
 130  * Special function to avoid ifdeffery in kernel/irq/devres.c which
 131  * gets magically built by GENERIC_HARDIRQS=n architectures (sparc,
 132  * m68k). I really love these $@%#!* obvious Makefile references:
 133  * ../../../kernel/irq/devres.o
 134  */
 135 static inline int __must_check
 136 request_threaded_irq(unsigned int irq, irq_handler_t handler,
 137                      irq_handler_t thread_fn,
 138                      unsigned long flags, const char *name, void *dev)
 139 {
 140         return request_irq(irq, handler, flags, name, dev);
 141 }
 142
 143 static inline void exit_irq_thread(void) { }
 144 #endif
 145
 146 extern void free_irq(unsigned int, void *);
 147
 148 struct device;
 149
 150 extern int __must_check
 151 devm_request_threaded_irq(struct device *dev, unsigned int irq,
 152                           irq_handler_t handler, irq_handler_t thread_fn,
 153                           unsigned long irqflags, const char *devname,
 154                           void *dev_id);
 155
 156 static inline int __must_check
 157 devm_request_irq(struct device *dev, unsigned int irq, irq_handler_t handler,
 158                  unsigned long irqflags, const char *devname, void *dev_id)
 159 {
 160         return devm_request_threaded_irq(dev, irq, handler, NULL, irqflags,
 161                                          devname, dev_id);
 162 }
 163
 164 extern void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id);
 165
 166 /*
 167  * On lockdep we dont want to enable hardirqs in hardirq
 168  * context. Use local_irq_enable_in_hardirq() to annotate
 169  * kernel code that has to do this nevertheless (pretty much
 170  * the only valid case is for old/broken hardware that is
 171  * insanely slow).
 172  *
 173  * NOTE: in theory this might break fragile code that relies
 174  * on hardirq delivery - in practice we dont seem to have such
 175  * places left. So the only effect should be slightly increased
 176  * irqs-off latencies.
 177  */
 178 #ifdef CONFIG_LOCKDEP
 179 # define local_irq_enable_in_hardirq()  do { } while (0)
 180 #else
 181 # define local_irq_enable_in_hardirq()  local_irq_enable()
 182 #endif
 183
 184 extern void disable_irq_nosync(unsigned int irq);
 185 extern void disable_irq(unsigned int irq);
 186 extern void enable_irq(unsigned int irq);
 187
 188 /* The following three functions are for the core kernel use only. */
 189 #ifdef CONFIG_GENERIC_HARDIRQS
 190 extern void suspend_device_irqs(void);
 191 extern void resume_device_irqs(void);
 192 #ifdef CONFIG_PM_SLEEP
 193 extern int check_wakeup_irqs(void);
 194 #else
 195 static inline int check_wakeup_irqs(void) { return 0; }
 196 #endif
 197 #else
 198 static inline void suspend_device_irqs(void) { };
 199 static inline void resume_device_irqs(void) { };
 200 static inline int check_wakeup_irqs(void) { return 0; }
 201 #endif
 202
 203 #if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS)
 204
 205 extern cpumask_var_t irq_default_affinity;
 206
 207 extern int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask);
 208 extern int irq_can_set_affinity(unsigned int irq);
 209 extern int irq_select_affinity(unsigned int irq);
 210
 211 #else /* CONFIG_SMP */
 212
 213 static inline int irq_set_affinity(unsigned int irq, const struct cpumask *m)
 214 {
 215         return -EINVAL;
 216 }
 217
 218 static inline int irq_can_set_affinity(unsigned int irq)
 219 {
 220         return 0;
 221 }
 222
 223 static inline int irq_select_affinity(unsigned int irq)  { return 0; }
 224
 225 #endif /* CONFIG_SMP && CONFIG_GENERIC_HARDIRQS */
 226
 227 #ifdef CONFIG_GENERIC_HARDIRQS
 228 /*
 229  * Special lockdep variants of irq disabling/enabling.
 230  * These should be used for locking constructs that
 231  * know that a particular irq context which is disabled,
 232  * and which is the only irq-context user of a lock,
 233  * that it's safe to take the lock in the irq-disabled
 234  * section without disabling hardirqs.
 235  *
 236  * On !CONFIG_LOCKDEP they are equivalent to the normal
 237  * irq disable/enable methods.
 238  */
 239 static inline void disable_irq_nosync_lockdep(unsigned int irq)
 240 {
 241         disable_irq_nosync(irq);
 242 #ifdef CONFIG_LOCKDEP
 243         local_irq_disable();
 244 #endif
 245 }
 246
 247 static inline void disable_irq_nosync_lockdep_irqsave(unsigned int irq, unsigned long *flags)
 248 {
 249         disable_irq_nosync(irq);
 250 #ifdef CONFIG_LOCKDEP
 251         local_irq_save(*flags);
 252 #endif
 253 }
 254
 255 static inline void disable_irq_lockdep(unsigned int irq)
 256 {
 257         disable_irq(irq);
 258 #ifdef CONFIG_LOCKDEP
 259         local_irq_disable();
 260 #endif
 261 }
 262
 263 static inline void enable_irq_lockdep(unsigned int irq)
 264 {
 265 #ifdef CONFIG_LOCKDEP
 266         local_irq_enable();
 267 #endif
 268         enable_irq(irq);
 269 }
 270
 271 static inline void enable_irq_lockdep_irqrestore(unsigned int irq, unsigned long *flags)
 272 {
 273 #ifdef CONFIG_LOCKDEP
 274         local_irq_restore(*flags);
 275 #endif
 276         enable_irq(irq);
 277 }
 278
 279 /* IRQ wakeup (PM) control: */
 280 extern int set_irq_wake(unsigned int irq, unsigned int on);
 281
 282 static inline int enable_irq_wake(unsigned int irq)
 283 {
 284         return set_irq_wake(irq, 1);
 285 }
 286
 287 static inline int disable_irq_wake(unsigned int irq)
 288 {
 289         return set_irq_wake(irq, 0);
 290 }
 291
 292 #else /* !CONFIG_GENERIC_HARDIRQS */
 293 /*
 294  * NOTE: non-genirq architectures, if they want to support the lock
 295  * validator need to define the methods below in their asm/irq.h
 296  * files, under an #ifdef CONFIG_LOCKDEP section.
 297  */
 298 #ifndef CONFIG_LOCKDEP
 299 #  define disable_irq_nosync_lockdep(irq)       disable_irq_nosync(irq)
 300 #  define disable_irq_nosync_lockdep_irqsave(irq, flags) \
 301                                                 disable_irq_nosync(irq)
 302 #  define disable_irq_lockdep(irq)              disable_irq(irq)
 303 #  define enable_irq_lockdep(irq)               enable_irq(irq)
 304 #  define enable_irq_lockdep_irqrestore(irq, flags) \
 305                                                 enable_irq(irq)
 306 # endif
 307
 308 static inline int enable_irq_wake(unsigned int irq)
 309 {
 310         return 0;
 311 }
 312
 313 static inline int disable_irq_wake(unsigned int irq)
 314 {
 315         return 0;
 316 }
 317 #endif /* CONFIG_GENERIC_HARDIRQS */
 318
 319 #ifndef __ARCH_SET_SOFTIRQ_PENDING
 320 #define set_softirq_pending(x) (local_softirq_pending() = (x))
 321 #define or_softirq_pending(x)  (local_softirq_pending() |= (x))
 322 #endif
 323
 324 /* Some architectures might implement lazy enabling/disabling of
 325  * interrupts. In some cases, such as stop_machine, we might want
 326  * to ensure that after a local_irq_disable(), interrupts have
 327  * really been disabled in hardware. Such architectures need to
 328  * implement the following hook.
 329  */
 330 #ifndef hard_irq_disable
 331 #define hard_irq_disable()      do { } while(0)
 332 #endif
 333
 334 /* PLEASE, avoid to allocate new softirqs, if you need not _really_ high
 335    frequency threaded job scheduling. For almost all the purposes
 336    tasklets are more than enough. F.e. all serial device BHs et
 337    al. should be converted to tasklets, not to softirqs.
 338  */
 339
 340 enum
 341 {
 342         HI_SOFTIRQ=0,
 343         TIMER_SOFTIRQ,
 344         NET_TX_SOFTIRQ,
 345         NET_RX_SOFTIRQ,
 346         BLOCK_SOFTIRQ,
 347         TASKLET_SOFTIRQ,
 348         SCHED_SOFTIRQ,
 349         HRTIMER_SOFTIRQ,
 350         RCU_SOFTIRQ,    /* Preferable RCU should always be the last softirq */
 351
 352         NR_SOFTIRQS
 353 };
 354
 355 /* map softirq index to softirq name. update 'softirq_to_name' in
 356  * kernel/softirq.c when adding a new softirq.
 357  */
 358 extern char *softirq_to_name[NR_SOFTIRQS];
 359
 360 /* softirq mask and active fields moved to irq_cpustat_t in
 361  * asm/hardirq.h to get better cache usage.  KAO
 362  */
 363
 364 struct softirq_action
 365 {
 366         void    (*action)(struct softirq_action *);
 367 };
 368
 369 asmlinkage void do_softirq(void);
 370 asmlinkage void __do_softirq(void);
 371 extern void open_softirq(int nr, void (*action)(struct softirq_action *));
 372 extern void softirq_init(void);
 373 #define __raise_softirq_irqoff(nr) do { or_softirq_pending(1UL << (nr)); } while (0)
 374 extern void raise_softirq_irqoff(unsigned int nr);
 375 extern void raise_softirq(unsigned int nr);
 376 extern void wakeup_softirqd(void);
 377
 378 /* This is the worklist that queues up per-cpu softirq work.
 379  *
 380  * send_remote_sendirq() adds work to these lists, and
 381  * the softirq handler itself dequeues from them.  The queues
 382  * are protected by disabling local cpu interrupts and they must
 383  * only be accessed by the local cpu that they are for.
 384  */
 385 DECLARE_PER_CPU(struct list_head [NR_SOFTIRQS], softirq_work_list);
 386
 387 /* Try to send a softirq to a remote cpu.  If this cannot be done, the
 388  * work will be queued to the local cpu.
 389  */
 390 extern void send_remote_softirq(struct call_single_data *cp, int cpu, int softirq);
 391
 392 /* Like send_remote_softirq(), but the caller must disable local cpu interrupts
 393  * and compute the current cpu, passed in as 'this_cpu'.
 394  */
 395 extern void __send_remote_softirq(struct call_single_data *cp, int cpu,
 396                                   int this_cpu, int softirq);
 397
 398 /* Tasklets --- multithreaded analogue of BHs.
 399
 400    Main feature differing them of generic softirqs: tasklet
 401    is running only on one CPU simultaneously.
 402
 403    Main feature differing them of BHs: different tasklets
 404    may be run simultaneously on different CPUs.
 405
 406    Properties:
 407    * If tasklet_schedule() is called, then tasklet is guaranteed
 408      to be executed on some cpu at least once after this.
 409    * If the tasklet is already scheduled, but its excecution is still not
 410      started, it will be executed only once.
 411    * If this tasklet is already running on another CPU (or schedule is called
 412      from tasklet itself), it is rescheduled for later.
 413    * Tasklet is strictly serialized wrt itself, but not
 414      wrt another tasklets. If client needs some intertask synchronization,
 415      he makes it with spinlocks.
 416  */
 417
 418 struct tasklet_struct
 419 {
 420         struct tasklet_struct *next;
 421         unsigned long state;
 422         atomic_t count;
 423         void (*func)(unsigned long);
 424         unsigned long data;
 425 };
 426
 427 #define DECLARE_TASKLET(name, func, data) \
 428 struct tasklet_struct name = { NULL, 0, ATOMIC_INIT(0), func, data }
 429
 430 #define DECLARE_TASKLET_DISABLED(name, func, data) \
 431 struct tasklet_struct name = { NULL, 0, ATOMIC_INIT(1), func, data }
 432
 433
 434 enum
 435 {
 436         TASKLET_STATE_SCHED,    /* Tasklet is scheduled for execution */
 437         TASKLET_STATE_RUN       /* Tasklet is running (SMP only) */
 438 };
 439
 440 #ifdef CONFIG_SMP
 441 static inline int tasklet_trylock(struct tasklet_struct *t)
 442 {
 443         return !test_and_set_bit(TASKLET_STATE_RUN, &(t)->state);
 444 }
 445
 446 static inline void tasklet_unlock(struct tasklet_struct *t)
 447 {
 448         smp_mb__before_clear_bit();
 449         clear_bit(TASKLET_STATE_RUN, &(t)->state);
 450 }
 451
 452 static inline void tasklet_unlock_wait(struct tasklet_struct *t)
 453 {
 454         while (test_bit(TASKLET_STATE_RUN, &(t)->state)) { barrier(); }
 455 }
 456 #else
 457 #define tasklet_trylock(t) 1
 458 #define tasklet_unlock_wait(t) do { } while (0)
 459 #define tasklet_unlock(t) do { } while (0)
 460 #endif
 461
 462 extern void __tasklet_schedule(struct tasklet_struct *t);
 463
 464 static inline void tasklet_schedule(struct tasklet_struct *t)
 465 {
 466         if (!test_and_set_bit(TASKLET_STATE_SCHED, &t->state))
 467                 __tasklet_schedule(t);
 468 }
 469
 470 extern void __tasklet_hi_schedule(struct tasklet_struct *t);
 471
 472 static inline void tasklet_hi_schedule(struct tasklet_struct *t)
 473 {
 474         if (!test_and_set_bit(TASKLET_STATE_SCHED, &t->state))
 475                 __tasklet_hi_schedule(t);
 476 }
 477
 478 extern void __tasklet_hi_schedule_first(struct tasklet_struct *t);
 479
 480 /*
 481  * This version avoids touching any other tasklets. Needed for kmemcheck
 482  * in order not to take any page faults while enqueueing this tasklet;
 483  * consider VERY carefully whether you really need this or
 484  * tasklet_hi_schedule()...
 485  */
 486 static inline void tasklet_hi_schedule_first(struct tasklet_struct *t)
 487 {
 488         if (!test_and_set_bit(TASKLET_STATE_SCHED, &t->state))
 489                 __tasklet_hi_schedule_first(t);
 490 }
 491
 492
 493 static inline void tasklet_disable_nosync(struct tasklet_struct *t)
 494 {
 495         atomic_inc(&t->count);
 496         smp_mb__after_atomic_inc();
 497 }
 498
 499 static inline void tasklet_disable(struct tasklet_struct *t)
 500 {
 501         tasklet_disable_nosync(t);
 502         tasklet_unlock_wait(t);
 503         smp_mb();
 504 }
 505
 506 static inline void tasklet_enable(struct tasklet_struct *t)
 507 {
 508         smp_mb__before_atomic_dec();
 509         atomic_dec(&t->count);
 510 }
 511
 512 static inline void tasklet_hi_enable(struct tasklet_struct *t)
 513 {
 514         smp_mb__before_atomic_dec();
 515         atomic_dec(&t->count);
 516 }
 517
 518 extern void tasklet_kill(struct tasklet_struct *t);
 519 extern void tasklet_kill_immediate(struct tasklet_struct *t, unsigned int cpu);
 520 extern void tasklet_init(struct tasklet_struct *t,
 521                          void (*func)(unsigned long), unsigned long data);
 522
 523 struct tasklet_hrtimer {
 524         struct hrtimer          timer;
 525         struct tasklet_struct   tasklet;
 526         enum hrtimer_restart    (*function)(struct hrtimer *);
 527 };
 528
 529 extern void
 530 tasklet_hrtimer_init(struct tasklet_hrtimer *ttimer,
 531                      enum hrtimer_restart (*function)(struct hrtimer *),
 532                      clockid_t which_clock, enum hrtimer_mode mode);
 533
 534 static inline
 535 int tasklet_hrtimer_start(struct tasklet_hrtimer *ttimer, ktime_t time,
 536                           const enum hrtimer_mode mode)
 537 {
 538         return hrtimer_start(&ttimer->timer, time, mode);
 539 }
 540
 541 static inline
 542 void tasklet_hrtimer_cancel(struct tasklet_hrtimer *ttimer)
 543 {
 544         hrtimer_cancel(&ttimer->timer);
 545         tasklet_kill(&ttimer->tasklet);
 546 }
 547
 548 /*
 549  * Autoprobing for irqs:
 550  *
 551  * probe_irq_on() and probe_irq_off() provide robust primitives
 552  * for accurate IRQ probing during kernel initialization.  They are
 553  * reasonably simple to use, are not "fooled" by spurious interrupts,
 554  * and, unlike other attempts at IRQ probing, they do not get hung on
 555  * stuck interrupts (such as unused PS2 mouse interfaces on ASUS boards).
 556  *
 557  * For reasonably foolproof probing, use them as follows:
 558  *
 559  * 1. clear and/or mask the device's internal interrupt.
 560  * 2. sti();
 561  * 3. irqs = probe_irq_on();      // "take over" all unassigned idle IRQs
 562  * 4. enable the device and cause it to trigger an interrupt.
 563  * 5. wait for the device to interrupt, using non-intrusive polling or a delay.
 564  * 6. irq = probe_irq_off(irqs);  // get IRQ number, 0=none, negative=multiple
 565  * 7. service the device to clear its pending interrupt.
 566  * 8. loop again if paranoia is required.
 567  *
 568  * probe_irq_on() returns a mask of allocated irq's.
 569  *
 570  * probe_irq_off() takes the mask as a parameter,
 571  * and returns the irq number which occurred,
 572  * or zero if none occurred, or a negative irq number
 573  * if more than one irq occurred.
 574  */
 575
 576 #if defined(CONFIG_GENERIC_HARDIRQS) && !defined(CONFIG_GENERIC_IRQ_PROBE)
 577 static inline unsigned long probe_irq_on(void)
 578 {
 579         return 0;
 580 }
 581 static inline int probe_irq_off(unsigned long val)
 582 {
 583         return 0;
 584 }
 585 static inline unsigned int probe_irq_mask(unsigned long val)
 586 {
 587         return 0;
 588 }
 589 #else
 590 extern unsigned long probe_irq_on(void);        /* returns 0 on failure */
 591 extern int probe_irq_off(unsigned long);        /* returns 0 or negative on failure */
 592 extern unsigned int probe_irq_mask(unsigned long);      /* returns mask of ISA interrupts */
 593 #endif
 594
 595 #ifdef CONFIG_PROC_FS
 596 /* Initialize /proc/irq/ */
 597 extern void init_irq_proc(void);
 598 #else
 599 static inline void init_irq_proc(void)
 600 {
 601 }
 602 #endif
 603
 604 #if defined(CONFIG_GENERIC_HARDIRQS) && defined(CONFIG_DEBUG_SHIRQ)
 605 extern void debug_poll_all_shared_irqs(void);
 606 #else
 607 static inline void debug_poll_all_shared_irqs(void) { }
 608 #endif
 609
 610 int show_interrupts(struct seq_file *p, void *v);
 611
 612 struct irq_desc;
 613
 614 extern int early_irq_init(void);
 615 extern int arch_probe_nr_irqs(void);
 616 extern int arch_early_irq_init(void);
 617 extern int arch_init_chip_data(struct irq_desc *desc, int node);
 618
 619 #endif