4 #include <linux/auxvec.h> /* For AT_VECTOR_SIZE */
9 #define CSIGNAL 0x000000ff /* signal mask to be sent at exit */
10 #define CLONE_VM 0x00000100 /* set if VM shared between processes */
11 #define CLONE_FS 0x00000200 /* set if fs info shared between processes */
12 #define CLONE_FILES 0x00000400 /* set if open files shared between processes */
13 #define CLONE_SIGHAND 0x00000800 /* set if signal handlers and blocked signals shared */
14 #define CLONE_PTRACE 0x00002000 /* set if we want to let tracing continue on the child too */
15 #define CLONE_VFORK 0x00004000 /* set if the parent wants the child to wake it up on mm_release */
16 #define CLONE_PARENT 0x00008000 /* set if we want to have the same parent as the cloner */
17 #define CLONE_THREAD 0x00010000 /* Same thread group? */
18 #define CLONE_NEWNS 0x00020000 /* New namespace group? */
19 #define CLONE_SYSVSEM 0x00040000 /* share system V SEM_UNDO semantics */
20 #define CLONE_SETTLS 0x00080000 /* create a new TLS for the child */
21 #define CLONE_PARENT_SETTID 0x00100000 /* set the TID in the parent */
22 #define CLONE_CHILD_CLEARTID 0x00200000 /* clear the TID in the child */
23 #define CLONE_DETACHED 0x00400000 /* Unused, ignored */
24 #define CLONE_UNTRACED 0x00800000 /* set if the tracing process can't force CLONE_PTRACE on this clone */
25 #define CLONE_CHILD_SETTID 0x01000000 /* set the TID in the child */
26 #define CLONE_STOPPED 0x02000000 /* Start in stopped state */
31 #define SCHED_NORMAL 0
42 #include <asm/param.h> /* for HZ */
44 #include <linux/capability.h>
45 #include <linux/threads.h>
46 #include <linux/kernel.h>
47 #include <linux/types.h>
48 #include <linux/timex.h>
49 #include <linux/jiffies.h>
50 #include <linux/rbtree.h>
51 #include <linux/thread_info.h>
52 #include <linux/cpumask.h>
53 #include <linux/errno.h>
54 #include <linux/nodemask.h>
56 #include <asm/system.h>
57 #include <asm/semaphore.h>
59 #include <asm/ptrace.h>
61 #include <asm/cputime.h>
63 #include <linux/smp.h>
64 #include <linux/sem.h>
65 #include <linux/signal.h>
66 #include <linux/securebits.h>
67 #include <linux/fs_struct.h>
68 #include <linux/compiler.h>
69 #include <linux/completion.h>
70 #include <linux/pid.h>
71 #include <linux/percpu.h>
72 #include <linux/topology.h>
73 #include <linux/seccomp.h>
74 #include <linux/rcupdate.h>
75 #include <linux/futex.h>
77 #include <linux/time.h>
78 #include <linux/param.h>
79 #include <linux/resource.h>
80 #include <linux/timer.h>
81 #include <linux/hrtimer.h>
83 #include <asm/processor.h>
88 * List of flags we want to share for kernel threads,
89 * if only because they are not used by them anyway.
91 #define CLONE_KERNEL (CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
94 * These are the constant used to fake the fixed-point load-average
95 * counting. Some notes:
96 * - 11 bit fractions expand to 22 bits by the multiplies: this gives
97 * a load-average precision of 10 bits integer + 11 bits fractional
98 * - if you want to count load-averages more often, you need more
99 * precision, or rounding will get you. With 2-second counting freq,
100 * the EXP_n values would be 1981, 2034 and 2043 if still using only
103 extern unsigned long avenrun[]; /* Load averages */
105 #define FSHIFT 11 /* nr of bits of precision */
106 #define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */
107 #define LOAD_FREQ (5*HZ) /* 5 sec intervals */
108 #define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */
109 #define EXP_5 2014 /* 1/exp(5sec/5min) */
110 #define EXP_15 2037 /* 1/exp(5sec/15min) */
112 #define CALC_LOAD(load,exp,n) \
114 load += n*(FIXED_1-exp); \
117 extern unsigned long total_forks;
118 extern int nr_threads;
120 DECLARE_PER_CPU(unsigned long, process_counts);
121 extern int nr_processes(void);
122 extern unsigned long nr_running(void);
123 extern unsigned long nr_uninterruptible(void);
124 extern unsigned long nr_active(void);
125 extern unsigned long nr_iowait(void);
129 * Task state bitmask. NOTE! These bits are also
130 * encoded in fs/proc/array.c: get_task_state().
132 * We have two separate sets of flags: task->state
133 * is about runnability, while task->exit_state are
134 * about the task exiting. Confusing, but this way
135 * modifying one set can't modify the other one by
138 #define TASK_RUNNING 0
139 #define TASK_INTERRUPTIBLE 1
140 #define TASK_UNINTERRUPTIBLE 2
141 #define TASK_STOPPED 4
142 #define TASK_TRACED 8
143 /* in tsk->exit_state */
144 #define EXIT_ZOMBIE 16
146 /* in tsk->state again */
147 #define TASK_NONINTERACTIVE 64
149 #define __set_task_state(tsk, state_value) \
150 do { (tsk)->state = (state_value); } while (0)
151 #define set_task_state(tsk, state_value) \
152 set_mb((tsk)->state, (state_value))
155 * set_current_state() includes a barrier so that the write of current->state
156 * is correctly serialised wrt the caller's subsequent test of whether to
159 * set_current_state(TASK_UNINTERRUPTIBLE);
160 * if (do_i_need_to_sleep())
163 * If the caller does not need such serialisation then use __set_current_state()
165 #define __set_current_state(state_value) \
166 do { current->state = (state_value); } while (0)
167 #define set_current_state(state_value) \
168 set_mb(current->state, (state_value))
170 /* Task command name length */
171 #define TASK_COMM_LEN 16
173 #include <linux/spinlock.h>
176 * This serializes "schedule()" and also protects
177 * the run-queue from deletions/modifications (but
178 * _adding_ to the beginning of the run-queue has
181 extern rwlock_t tasklist_lock;
182 extern spinlock_t mmlist_lock;
184 typedef struct task_struct task_t;
186 extern void sched_init(void);
187 extern void sched_init_smp(void);
188 extern void init_idle(task_t *idle, int cpu);
190 extern cpumask_t nohz_cpu_mask;
192 extern void show_state(void);
193 extern void show_regs(struct pt_regs *);
196 * TASK is a pointer to the task whose backtrace we want to see (or NULL for current
197 * task), SP is the stack pointer of the first frame that should be shown in the back
198 * trace (or NULL if the entire call-chain of the task should be shown).
200 extern void show_stack(struct task_struct *task, unsigned long *sp);
202 void io_schedule(void);
203 long io_schedule_timeout(long timeout);
205 extern void cpu_init (void);
206 extern void trap_init(void);
207 extern void update_process_times(int user);
208 extern void scheduler_tick(void);
210 #ifdef CONFIG_DETECT_SOFTLOCKUP
211 extern void softlockup_tick(void);
212 extern void spawn_softlockup_task(void);
213 extern void touch_softlockup_watchdog(void);
215 static inline void softlockup_tick(void)
218 static inline void spawn_softlockup_task(void)
221 static inline void touch_softlockup_watchdog(void)
227 /* Attach to any functions which should be ignored in wchan output. */
228 #define __sched __attribute__((__section__(".sched.text")))
229 /* Is this address in the __sched functions? */
230 extern int in_sched_functions(unsigned long addr);
232 #define MAX_SCHEDULE_TIMEOUT LONG_MAX
233 extern signed long FASTCALL(schedule_timeout(signed long timeout));
234 extern signed long schedule_timeout_interruptible(signed long timeout);
235 extern signed long schedule_timeout_uninterruptible(signed long timeout);
236 asmlinkage void schedule(void);
240 /* Maximum number of active map areas.. This is a random (large) number */
241 #define DEFAULT_MAX_MAP_COUNT 65536
243 extern int sysctl_max_map_count;
245 #include <linux/aio.h>
248 arch_get_unmapped_area(struct file *, unsigned long, unsigned long,
249 unsigned long, unsigned long);
251 arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
252 unsigned long len, unsigned long pgoff,
253 unsigned long flags);
254 extern void arch_unmap_area(struct mm_struct *, unsigned long);
255 extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
257 #if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
259 * The mm counters are not protected by its page_table_lock,
260 * so must be incremented atomically.
262 #define set_mm_counter(mm, member, value) atomic_long_set(&(mm)->_##member, value)
263 #define get_mm_counter(mm, member) ((unsigned long)atomic_long_read(&(mm)->_##member))
264 #define add_mm_counter(mm, member, value) atomic_long_add(value, &(mm)->_##member)
265 #define inc_mm_counter(mm, member) atomic_long_inc(&(mm)->_##member)
266 #define dec_mm_counter(mm, member) atomic_long_dec(&(mm)->_##member)
267 typedef atomic_long_t mm_counter_t;
269 #else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
271 * The mm counters are protected by its page_table_lock,
272 * so can be incremented directly.
274 #define set_mm_counter(mm, member, value) (mm)->_##member = (value)
275 #define get_mm_counter(mm, member) ((mm)->_##member)
276 #define add_mm_counter(mm, member, value) (mm)->_##member += (value)
277 #define inc_mm_counter(mm, member) (mm)->_##member++
278 #define dec_mm_counter(mm, member) (mm)->_##member--
279 typedef unsigned long mm_counter_t;
281 #endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
283 #define get_mm_rss(mm) \
284 (get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss))
285 #define update_hiwater_rss(mm) do { \
286 unsigned long _rss = get_mm_rss(mm); \
287 if ((mm)->hiwater_rss < _rss) \
288 (mm)->hiwater_rss = _rss; \
290 #define update_hiwater_vm(mm) do { \
291 if ((mm)->hiwater_vm < (mm)->total_vm) \
292 (mm)->hiwater_vm = (mm)->total_vm; \
296 struct vm_area_struct * mmap; /* list of VMAs */
297 struct rb_root mm_rb;
298 struct vm_area_struct * mmap_cache; /* last find_vma result */
299 unsigned long (*get_unmapped_area) (struct file *filp,
300 unsigned long addr, unsigned long len,
301 unsigned long pgoff, unsigned long flags);
302 void (*unmap_area) (struct mm_struct *mm, unsigned long addr);
303 unsigned long mmap_base; /* base of mmap area */
304 unsigned long task_size; /* size of task vm space */
305 unsigned long cached_hole_size; /* if non-zero, the largest hole below free_area_cache */
306 unsigned long free_area_cache; /* first hole of size cached_hole_size or larger */
308 atomic_t mm_users; /* How many users with user space? */
309 atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */
310 int map_count; /* number of VMAs */
311 struct rw_semaphore mmap_sem;
312 spinlock_t page_table_lock; /* Protects page tables and some counters */
314 struct list_head mmlist; /* List of maybe swapped mm's. These are globally strung
315 * together off init_mm.mmlist, and are protected
319 /* Special counters, in some configurations protected by the
320 * page_table_lock, in other configurations by being atomic.
322 mm_counter_t _file_rss;
323 mm_counter_t _anon_rss;
325 unsigned long hiwater_rss; /* High-watermark of RSS usage */
326 unsigned long hiwater_vm; /* High-water virtual memory usage */
328 unsigned long total_vm, locked_vm, shared_vm, exec_vm;
329 unsigned long stack_vm, reserved_vm, def_flags, nr_ptes;
330 unsigned long start_code, end_code, start_data, end_data;
331 unsigned long start_brk, brk, start_stack;
332 unsigned long arg_start, arg_end, env_start, env_end;
334 unsigned long saved_auxv[AT_VECTOR_SIZE]; /* for /proc/PID/auxv */
337 cpumask_t cpu_vm_mask;
339 /* Architecture-specific MM context */
340 mm_context_t context;
342 /* Token based thrashing protection. */
343 unsigned long swap_token_time;
346 /* coredumping support */
348 struct completion *core_startup_done, core_done;
351 rwlock_t ioctx_list_lock;
352 struct kioctx *ioctx_list;
355 struct sighand_struct {
357 struct k_sigaction action[_NSIG];
361 struct pacct_struct {
362 unsigned long ac_mem;
366 * NOTE! "signal_struct" does not have it's own
367 * locking, because a shared signal_struct always
368 * implies a shared sighand_struct, so locking
369 * sighand_struct is always a proper superset of
370 * the locking of signal_struct.
372 struct signal_struct {
376 wait_queue_head_t wait_chldexit; /* for wait4() */
378 /* current thread group signal load-balancing target: */
381 /* shared signal handling: */
382 struct sigpending shared_pending;
384 /* thread group exit support */
387 * - notify group_exit_task when ->count is equal to notify_count
388 * - everyone except group_exit_task is stopped during signal delivery
389 * of fatal signals, group_exit_task processes the signal.
391 struct task_struct *group_exit_task;
394 /* thread group stop support, overloads group_exit_code too */
395 int group_stop_count;
396 unsigned int flags; /* see SIGNAL_* flags below */
398 /* POSIX.1b Interval Timers */
399 struct list_head posix_timers;
401 /* ITIMER_REAL timer for the process */
402 struct hrtimer real_timer;
403 struct task_struct *tsk;
404 ktime_t it_real_incr;
406 /* ITIMER_PROF and ITIMER_VIRTUAL timers for the process */
407 cputime_t it_prof_expires, it_virt_expires;
408 cputime_t it_prof_incr, it_virt_incr;
410 /* job control IDs */
414 /* boolean value for session group leader */
417 struct tty_struct *tty; /* NULL if no tty */
420 * Cumulative resource counters for dead threads in the group,
421 * and for reaped dead child processes forked by this group.
422 * Live threads maintain their own counters and add to these
423 * in __exit_signal, except for the group leader.
425 cputime_t utime, stime, cutime, cstime;
426 unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
427 unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
430 * Cumulative ns of scheduled CPU time for dead threads in the
431 * group, not including a zombie group leader. (This only differs
432 * from jiffies_to_ns(utime + stime) if sched_clock uses something
433 * other than jiffies.)
435 unsigned long long sched_time;
438 * We don't bother to synchronize most readers of this at all,
439 * because there is no reader checking a limit that actually needs
440 * to get both rlim_cur and rlim_max atomically, and either one
441 * alone is a single word that can safely be read normally.
442 * getrlimit/setrlimit use task_lock(current->group_leader) to
443 * protect this instead of the siglock, because they really
444 * have no need to disable irqs.
446 struct rlimit rlim[RLIM_NLIMITS];
448 struct list_head cpu_timers[3];
450 /* keep the process-shared keyrings here so that they do the right
451 * thing in threads created with CLONE_THREAD */
453 struct key *session_keyring; /* keyring inherited over fork */
454 struct key *process_keyring; /* keyring private to this process */
456 #ifdef CONFIG_BSD_PROCESS_ACCT
457 struct pacct_struct pacct; /* per-process accounting information */
461 /* Context switch must be unlocked if interrupts are to be enabled */
462 #ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW
463 # define __ARCH_WANT_UNLOCKED_CTXSW
467 * Bits in flags field of signal_struct.
469 #define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */
470 #define SIGNAL_STOP_DEQUEUED 0x00000002 /* stop signal dequeued */
471 #define SIGNAL_STOP_CONTINUED 0x00000004 /* SIGCONT since WCONTINUED reap */
472 #define SIGNAL_GROUP_EXIT 0x00000008 /* group exit in progress */
476 * Priority of a process goes from 0..MAX_PRIO-1, valid RT
477 * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
478 * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority
479 * values are inverted: lower p->prio value means higher priority.
481 * The MAX_USER_RT_PRIO value allows the actual maximum
482 * RT priority to be separate from the value exported to
483 * user-space. This allows kernel threads to set their
484 * priority to a value higher than any user task. Note:
485 * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.
488 #define MAX_USER_RT_PRIO 100
489 #define MAX_RT_PRIO MAX_USER_RT_PRIO
491 #define MAX_PRIO (MAX_RT_PRIO + 40)
493 #define rt_task(p) (unlikely((p)->prio < MAX_RT_PRIO))
494 #define batch_task(p) (unlikely((p)->policy == SCHED_BATCH))
497 * Some day this will be a full-fledged user tracking system..
500 atomic_t __count; /* reference count */
501 atomic_t processes; /* How many processes does this user have? */
502 atomic_t files; /* How many open files does this user have? */
503 atomic_t sigpending; /* How many pending signals does this user have? */
504 #ifdef CONFIG_INOTIFY_USER
505 atomic_t inotify_watches; /* How many inotify watches does this user have? */
506 atomic_t inotify_devs; /* How many inotify devs does this user have opened? */
508 /* protected by mq_lock */
509 unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
510 unsigned long locked_shm; /* How many pages of mlocked shm ? */
513 struct key *uid_keyring; /* UID specific keyring */
514 struct key *session_keyring; /* UID's default session keyring */
517 /* Hash table maintenance information */
518 struct list_head uidhash_list;
522 extern struct user_struct *find_user(uid_t);
524 extern struct user_struct root_user;
525 #define INIT_USER (&root_user)
527 typedef struct prio_array prio_array_t;
528 struct backing_dev_info;
529 struct reclaim_state;
531 #ifdef CONFIG_SCHEDSTATS
533 /* cumulative counters */
534 unsigned long cpu_time, /* time spent on the cpu */
535 run_delay, /* time spent waiting on a runqueue */
536 pcnt; /* # of timeslices run on this cpu */
539 unsigned long last_arrival, /* when we last ran on a cpu */
540 last_queued; /* when we were last queued to run */
543 extern struct file_operations proc_schedstat_operations;
555 * sched-domains (multiprocessor balancing) declarations:
558 #define SCHED_LOAD_SCALE 128UL /* increase resolution of load */
560 #define SD_LOAD_BALANCE 1 /* Do load balancing on this domain. */
561 #define SD_BALANCE_NEWIDLE 2 /* Balance when about to become idle */
562 #define SD_BALANCE_EXEC 4 /* Balance on exec */
563 #define SD_BALANCE_FORK 8 /* Balance on fork, clone */
564 #define SD_WAKE_IDLE 16 /* Wake to idle CPU on task wakeup */
565 #define SD_WAKE_AFFINE 32 /* Wake task to waking CPU */
566 #define SD_WAKE_BALANCE 64 /* Perform balancing at task wakeup */
567 #define SD_SHARE_CPUPOWER 128 /* Domain members share cpu power */
570 struct sched_group *next; /* Must be a circular list */
574 * CPU power of this group, SCHED_LOAD_SCALE being max power for a
575 * single CPU. This is read only (except for setup, hotplug CPU).
577 unsigned long cpu_power;
580 struct sched_domain {
581 /* These fields must be setup */
582 struct sched_domain *parent; /* top domain must be null terminated */
583 struct sched_group *groups; /* the balancing groups of the domain */
584 cpumask_t span; /* span of all CPUs in this domain */
585 unsigned long min_interval; /* Minimum balance interval ms */
586 unsigned long max_interval; /* Maximum balance interval ms */
587 unsigned int busy_factor; /* less balancing by factor if busy */
588 unsigned int imbalance_pct; /* No balance until over watermark */
589 unsigned long long cache_hot_time; /* Task considered cache hot (ns) */
590 unsigned int cache_nice_tries; /* Leave cache hot tasks for # tries */
591 unsigned int per_cpu_gain; /* CPU % gained by adding domain cpus */
592 unsigned int busy_idx;
593 unsigned int idle_idx;
594 unsigned int newidle_idx;
595 unsigned int wake_idx;
596 unsigned int forkexec_idx;
597 int flags; /* See SD_* */
599 /* Runtime fields. */
600 unsigned long last_balance; /* init to jiffies. units in jiffies */
601 unsigned int balance_interval; /* initialise to 1. units in ms. */
602 unsigned int nr_balance_failed; /* initialise to 0 */
604 #ifdef CONFIG_SCHEDSTATS
605 /* load_balance() stats */
606 unsigned long lb_cnt[MAX_IDLE_TYPES];
607 unsigned long lb_failed[MAX_IDLE_TYPES];
608 unsigned long lb_balanced[MAX_IDLE_TYPES];
609 unsigned long lb_imbalance[MAX_IDLE_TYPES];
610 unsigned long lb_gained[MAX_IDLE_TYPES];
611 unsigned long lb_hot_gained[MAX_IDLE_TYPES];
612 unsigned long lb_nobusyg[MAX_IDLE_TYPES];
613 unsigned long lb_nobusyq[MAX_IDLE_TYPES];
615 /* Active load balancing */
616 unsigned long alb_cnt;
617 unsigned long alb_failed;
618 unsigned long alb_pushed;
620 /* SD_BALANCE_EXEC stats */
621 unsigned long sbe_cnt;
622 unsigned long sbe_balanced;
623 unsigned long sbe_pushed;
625 /* SD_BALANCE_FORK stats */
626 unsigned long sbf_cnt;
627 unsigned long sbf_balanced;
628 unsigned long sbf_pushed;
630 /* try_to_wake_up() stats */
631 unsigned long ttwu_wake_remote;
632 unsigned long ttwu_move_affine;
633 unsigned long ttwu_move_balance;
637 extern void partition_sched_domains(cpumask_t *partition1,
638 cpumask_t *partition2);
641 * Maximum cache size the migration-costs auto-tuning code will
644 extern unsigned int max_cache_size;
646 #endif /* CONFIG_SMP */
649 struct io_context; /* See blkdev.h */
650 void exit_io_context(void);
653 #define NGROUPS_SMALL 32
654 #define NGROUPS_PER_BLOCK ((int)(PAGE_SIZE / sizeof(gid_t)))
658 gid_t small_block[NGROUPS_SMALL];
664 * get_group_info() must be called with the owning task locked (via task_lock())
665 * when task != current. The reason being that the vast majority of callers are
666 * looking at current->group_info, which can not be changed except by the
667 * current task. Changing current->group_info requires the task lock, too.
669 #define get_group_info(group_info) do { \
670 atomic_inc(&(group_info)->usage); \
673 #define put_group_info(group_info) do { \
674 if (atomic_dec_and_test(&(group_info)->usage)) \
675 groups_free(group_info); \
678 extern struct group_info *groups_alloc(int gidsetsize);
679 extern void groups_free(struct group_info *group_info);
680 extern int set_current_groups(struct group_info *group_info);
681 extern int groups_search(struct group_info *group_info, gid_t grp);
682 /* access the groups "array" with this macro */
683 #define GROUP_AT(gi, i) \
684 ((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
686 #ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
687 extern void prefetch_stack(struct task_struct*);
689 static inline void prefetch_stack(struct task_struct *t) { }
692 struct audit_context; /* See audit.c */
694 struct pipe_inode_info;
698 SLEEP_NONINTERACTIVE,
704 volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */
705 struct thread_info *thread_info;
707 unsigned long flags; /* per process flags, defined below */
708 unsigned long ptrace;
710 int lock_depth; /* BKL lock depth */
712 #if defined(CONFIG_SMP) && defined(__ARCH_WANT_UNLOCKED_CTXSW)
715 int prio, static_prio;
716 struct list_head run_list;
719 unsigned short ioprio;
720 unsigned int btrace_seq;
722 unsigned long sleep_avg;
723 unsigned long long timestamp, last_ran;
724 unsigned long long sched_time; /* sched_clock time spent running */
725 enum sleep_type sleep_type;
727 unsigned long policy;
728 cpumask_t cpus_allowed;
729 unsigned int time_slice, first_time_slice;
731 #ifdef CONFIG_SCHEDSTATS
732 struct sched_info sched_info;
735 struct list_head tasks;
737 * ptrace_list/ptrace_children forms the list of my children
738 * that were stolen by a ptracer.
740 struct list_head ptrace_children;
741 struct list_head ptrace_list;
743 struct mm_struct *mm, *active_mm;
746 struct linux_binfmt *binfmt;
748 int exit_code, exit_signal;
749 int pdeath_signal; /* The signal sent when the parent dies */
751 unsigned long personality;
756 * pointers to (original) parent process, youngest child, younger sibling,
757 * older sibling, respectively. (p->father can be replaced with
760 struct task_struct *real_parent; /* real parent process (when being debugged) */
761 struct task_struct *parent; /* parent process */
763 * children/sibling forms the list of my children plus the
764 * tasks I'm ptracing.
766 struct list_head children; /* list of my children */
767 struct list_head sibling; /* linkage in my parent's children list */
768 struct task_struct *group_leader; /* threadgroup leader */
770 /* PID/PID hash table linkage. */
771 struct pid_link pids[PIDTYPE_MAX];
772 struct list_head thread_group;
774 struct completion *vfork_done; /* for vfork() */
775 int __user *set_child_tid; /* CLONE_CHILD_SETTID */
776 int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */
778 unsigned long rt_priority;
779 cputime_t utime, stime;
780 unsigned long nvcsw, nivcsw; /* context switch counts */
781 struct timespec start_time;
782 /* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */
783 unsigned long min_flt, maj_flt;
785 cputime_t it_prof_expires, it_virt_expires;
786 unsigned long long it_sched_expires;
787 struct list_head cpu_timers[3];
789 /* process credentials */
790 uid_t uid,euid,suid,fsuid;
791 gid_t gid,egid,sgid,fsgid;
792 struct group_info *group_info;
793 kernel_cap_t cap_effective, cap_inheritable, cap_permitted;
794 unsigned keep_capabilities:1;
795 struct user_struct *user;
797 struct key *request_key_auth; /* assumed request_key authority */
798 struct key *thread_keyring; /* keyring private to this thread */
799 unsigned char jit_keyring; /* default keyring to attach requested keys to */
801 int oomkilladj; /* OOM kill score adjustment (bit shift). */
802 char comm[TASK_COMM_LEN]; /* executable name excluding path
803 - access with [gs]et_task_comm (which lock
805 - initialized normally by flush_old_exec */
806 /* file system info */
807 int link_count, total_link_count;
809 struct sysv_sem sysvsem;
810 /* CPU-specific state of this task */
811 struct thread_struct thread;
812 /* filesystem information */
813 struct fs_struct *fs;
814 /* open file information */
815 struct files_struct *files;
817 struct namespace *namespace;
818 /* signal handlers */
819 struct signal_struct *signal;
820 struct sighand_struct *sighand;
822 sigset_t blocked, real_blocked;
823 sigset_t saved_sigmask; /* To be restored with TIF_RESTORE_SIGMASK */
824 struct sigpending pending;
826 unsigned long sas_ss_sp;
828 int (*notifier)(void *priv);
830 sigset_t *notifier_mask;
833 struct audit_context *audit_context;
836 /* Thread group tracking */
839 /* Protection of (de-)allocation: mm, files, fs, tty, keyrings */
840 spinlock_t alloc_lock;
841 /* Protection of proc_dentry: nesting proc_lock, dcache_lock, write_lock_irq(&tasklist_lock); */
842 spinlock_t proc_lock;
844 #ifdef CONFIG_DEBUG_MUTEXES
845 /* mutex deadlock detection */
846 struct mutex_waiter *blocked_on;
849 /* journalling filesystem info */
853 struct reclaim_state *reclaim_state;
855 struct dentry *proc_dentry;
856 struct backing_dev_info *backing_dev_info;
858 struct io_context *io_context;
860 unsigned long ptrace_message;
861 siginfo_t *last_siginfo; /* For ptrace use. */
863 * current io wait handle: wait queue entry to use for io waits
864 * If this thread is processing aio, this points at the waitqueue
865 * inside the currently handled kiocb. It may be NULL (i.e. default
866 * to a stack based synchronous wait) if its doing sync IO.
868 wait_queue_t *io_wait;
869 /* i/o counters(bytes read/written, #syscalls */
870 u64 rchar, wchar, syscr, syscw;
871 #if defined(CONFIG_BSD_PROCESS_ACCT)
872 u64 acct_rss_mem1; /* accumulated rss usage */
873 u64 acct_vm_mem1; /* accumulated virtual memory usage */
874 clock_t acct_stimexpd; /* clock_t-converted stime since last update */
877 struct mempolicy *mempolicy;
880 #ifdef CONFIG_CPUSETS
881 struct cpuset *cpuset;
882 nodemask_t mems_allowed;
883 int cpuset_mems_generation;
884 int cpuset_mem_spread_rotor;
886 struct robust_list_head __user *robust_list;
888 struct compat_robust_list_head __user *compat_robust_list;
891 atomic_t fs_excl; /* holding fs exclusive resources */
895 * cache last used pipe for splice
897 struct pipe_inode_info *splice_pipe;
900 static inline pid_t process_group(struct task_struct *tsk)
902 return tsk->signal->pgrp;
906 * pid_alive - check that a task structure is not stale
907 * @p: Task structure to be checked.
909 * Test if a process is not yet dead (at most zombie state)
910 * If pid_alive fails, then pointers within the task structure
911 * can be stale and must not be dereferenced.
913 static inline int pid_alive(struct task_struct *p)
915 return p->pids[PIDTYPE_PID].pid != NULL;
918 extern void free_task(struct task_struct *tsk);
919 #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
921 extern void __put_task_struct(struct task_struct *t);
923 static inline void put_task_struct(struct task_struct *t)
925 if (atomic_dec_and_test(&t->usage))
926 __put_task_struct(t);
932 #define PF_ALIGNWARN 0x00000001 /* Print alignment warning msgs */
933 /* Not implemented yet, only for 486*/
934 #define PF_STARTING 0x00000002 /* being created */
935 #define PF_EXITING 0x00000004 /* getting shut down */
936 #define PF_DEAD 0x00000008 /* Dead */
937 #define PF_FORKNOEXEC 0x00000040 /* forked but didn't exec */
938 #define PF_SUPERPRIV 0x00000100 /* used super-user privileges */
939 #define PF_DUMPCORE 0x00000200 /* dumped core */
940 #define PF_SIGNALED 0x00000400 /* killed by a signal */
941 #define PF_MEMALLOC 0x00000800 /* Allocating memory */
942 #define PF_FLUSHER 0x00001000 /* responsible for disk writeback */
943 #define PF_USED_MATH 0x00002000 /* if unset the fpu must be initialized before use */
944 #define PF_FREEZE 0x00004000 /* this task is being frozen for suspend now */
945 #define PF_NOFREEZE 0x00008000 /* this thread should not be frozen */
946 #define PF_FROZEN 0x00010000 /* frozen for system suspend */
947 #define PF_FSTRANS 0x00020000 /* inside a filesystem transaction */
948 #define PF_KSWAPD 0x00040000 /* I am kswapd */
949 #define PF_SWAPOFF 0x00080000 /* I am in swapoff */
950 #define PF_LESS_THROTTLE 0x00100000 /* Throttle me less: I clean memory */
951 #define PF_BORROWED_MM 0x00200000 /* I am a kthread doing use_mm */
952 #define PF_RANDOMIZE 0x00400000 /* randomize virtual address space */
953 #define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */
954 #define PF_SPREAD_PAGE 0x01000000 /* Spread page cache over cpuset */
955 #define PF_SPREAD_SLAB 0x02000000 /* Spread some slab caches over cpuset */
956 #define PF_MEMPOLICY 0x10000000 /* Non-default NUMA mempolicy */
959 * Only the _current_ task can read/write to tsk->flags, but other
960 * tasks can access tsk->flags in readonly mode for example
961 * with tsk_used_math (like during threaded core dumping).
962 * There is however an exception to this rule during ptrace
963 * or during fork: the ptracer task is allowed to write to the
964 * child->flags of its traced child (same goes for fork, the parent
965 * can write to the child->flags), because we're guaranteed the
966 * child is not running and in turn not changing child->flags
967 * at the same time the parent does it.
969 #define clear_stopped_child_used_math(child) do { (child)->flags &= ~PF_USED_MATH; } while (0)
970 #define set_stopped_child_used_math(child) do { (child)->flags |= PF_USED_MATH; } while (0)
971 #define clear_used_math() clear_stopped_child_used_math(current)
972 #define set_used_math() set_stopped_child_used_math(current)
973 #define conditional_stopped_child_used_math(condition, child) \
974 do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= (condition) ? PF_USED_MATH : 0; } while (0)
975 #define conditional_used_math(condition) \
976 conditional_stopped_child_used_math(condition, current)
977 #define copy_to_stopped_child_used_math(child) \
978 do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= current->flags & PF_USED_MATH; } while (0)
979 /* NOTE: this will return 0 or PF_USED_MATH, it will never return 1 */
980 #define tsk_used_math(p) ((p)->flags & PF_USED_MATH)
981 #define used_math() tsk_used_math(current)
984 extern int set_cpus_allowed(task_t *p, cpumask_t new_mask);
986 static inline int set_cpus_allowed(task_t *p, cpumask_t new_mask)
988 if (!cpu_isset(0, new_mask))
994 extern unsigned long long sched_clock(void);
995 extern unsigned long long current_sched_time(const task_t *current_task);
997 /* sched_exec is called by processes performing an exec */
999 extern void sched_exec(void);
1001 #define sched_exec() {}
1004 #ifdef CONFIG_HOTPLUG_CPU
1005 extern void idle_task_exit(void);
1007 static inline void idle_task_exit(void) {}
1010 extern void sched_idle_next(void);
1011 extern void set_user_nice(task_t *p, long nice);
1012 extern int task_prio(const task_t *p);
1013 extern int task_nice(const task_t *p);
1014 extern int can_nice(const task_t *p, const int nice);
1015 extern int task_curr(const task_t *p);
1016 extern int idle_cpu(int cpu);
1017 extern int sched_setscheduler(struct task_struct *, int, struct sched_param *);
1018 extern task_t *idle_task(int cpu);
1019 extern task_t *curr_task(int cpu);
1020 extern void set_curr_task(int cpu, task_t *p);
1025 * The default (Linux) execution domain.
1027 extern struct exec_domain default_exec_domain;
1029 union thread_union {
1030 struct thread_info thread_info;
1031 unsigned long stack[THREAD_SIZE/sizeof(long)];
1034 #ifndef __HAVE_ARCH_KSTACK_END
1035 static inline int kstack_end(void *addr)
1037 /* Reliable end of stack detection:
1038 * Some APM bios versions misalign the stack
1040 return !(((unsigned long)addr+sizeof(void*)-1) & (THREAD_SIZE-sizeof(void*)));
1044 extern union thread_union init_thread_union;
1045 extern struct task_struct init_task;
1047 extern struct mm_struct init_mm;
1049 #define find_task_by_pid(nr) find_task_by_pid_type(PIDTYPE_PID, nr)
1050 extern struct task_struct *find_task_by_pid_type(int type, int pid);
1051 extern void set_special_pids(pid_t session, pid_t pgrp);
1052 extern void __set_special_pids(pid_t session, pid_t pgrp);
1054 /* per-UID process charging. */
1055 extern struct user_struct * alloc_uid(uid_t);
1056 static inline struct user_struct *get_uid(struct user_struct *u)
1058 atomic_inc(&u->__count);
1061 extern void free_uid(struct user_struct *);
1062 extern void switch_uid(struct user_struct *);
1064 #include <asm/current.h>
1066 extern void do_timer(struct pt_regs *);
1068 extern int FASTCALL(wake_up_state(struct task_struct * tsk, unsigned int state));
1069 extern int FASTCALL(wake_up_process(struct task_struct * tsk));
1070 extern void FASTCALL(wake_up_new_task(struct task_struct * tsk,
1071 unsigned long clone_flags));
1073 extern void kick_process(struct task_struct *tsk);
1075 static inline void kick_process(struct task_struct *tsk) { }
1077 extern void FASTCALL(sched_fork(task_t * p, int clone_flags));
1078 extern void FASTCALL(sched_exit(task_t * p));
1080 extern int in_group_p(gid_t);
1081 extern int in_egroup_p(gid_t);
1083 extern void proc_caches_init(void);
1084 extern void flush_signals(struct task_struct *);
1085 extern void flush_signal_handlers(struct task_struct *, int force_default);
1086 extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);
1088 static inline int dequeue_signal_lock(struct task_struct *tsk, sigset_t *mask, siginfo_t *info)
1090 unsigned long flags;
1093 spin_lock_irqsave(&tsk->sighand->siglock, flags);
1094 ret = dequeue_signal(tsk, mask, info);
1095 spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
1100 extern void block_all_signals(int (*notifier)(void *priv), void *priv,
1102 extern void unblock_all_signals(void);
1103 extern void release_task(struct task_struct * p);
1104 extern int send_sig_info(int, struct siginfo *, struct task_struct *);
1105 extern int send_group_sig_info(int, struct siginfo *, struct task_struct *);
1106 extern int force_sigsegv(int, struct task_struct *);
1107 extern int force_sig_info(int, struct siginfo *, struct task_struct *);
1108 extern int __kill_pg_info(int sig, struct siginfo *info, pid_t pgrp);
1109 extern int kill_pg_info(int, struct siginfo *, pid_t);
1110 extern int kill_proc_info(int, struct siginfo *, pid_t);
1111 extern int kill_proc_info_as_uid(int, struct siginfo *, pid_t, uid_t, uid_t);
1112 extern void do_notify_parent(struct task_struct *, int);
1113 extern void force_sig(int, struct task_struct *);
1114 extern void force_sig_specific(int, struct task_struct *);
1115 extern int send_sig(int, struct task_struct *, int);
1116 extern void zap_other_threads(struct task_struct *p);
1117 extern int kill_pg(pid_t, int, int);
1118 extern int kill_proc(pid_t, int, int);
1119 extern struct sigqueue *sigqueue_alloc(void);
1120 extern void sigqueue_free(struct sigqueue *);
1121 extern int send_sigqueue(int, struct sigqueue *, struct task_struct *);
1122 extern int send_group_sigqueue(int, struct sigqueue *, struct task_struct *);
1123 extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
1124 extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long);
1126 /* These can be the second arg to send_sig_info/send_group_sig_info. */
1127 #define SEND_SIG_NOINFO ((struct siginfo *) 0)
1128 #define SEND_SIG_PRIV ((struct siginfo *) 1)
1129 #define SEND_SIG_FORCED ((struct siginfo *) 2)
1131 static inline int is_si_special(const struct siginfo *info)
1133 return info <= SEND_SIG_FORCED;
1136 /* True if we are on the alternate signal stack. */
1138 static inline int on_sig_stack(unsigned long sp)
1140 return (sp - current->sas_ss_sp < current->sas_ss_size);
1143 static inline int sas_ss_flags(unsigned long sp)
1145 return (current->sas_ss_size == 0 ? SS_DISABLE
1146 : on_sig_stack(sp) ? SS_ONSTACK : 0);
1150 * Routines for handling mm_structs
1152 extern struct mm_struct * mm_alloc(void);
1154 /* mmdrop drops the mm and the page tables */
1155 extern void FASTCALL(__mmdrop(struct mm_struct *));
1156 static inline void mmdrop(struct mm_struct * mm)
1158 if (atomic_dec_and_test(&mm->mm_count))
1162 /* mmput gets rid of the mappings and all user-space */
1163 extern void mmput(struct mm_struct *);
1164 /* Grab a reference to a task's mm, if it is not already going away */
1165 extern struct mm_struct *get_task_mm(struct task_struct *task);
1166 /* Remove the current tasks stale references to the old mm_struct */
1167 extern void mm_release(struct task_struct *, struct mm_struct *);
1169 extern int copy_thread(int, unsigned long, unsigned long, unsigned long, struct task_struct *, struct pt_regs *);
1170 extern void flush_thread(void);
1171 extern void exit_thread(void);
1173 extern void exit_files(struct task_struct *);
1174 extern void __cleanup_signal(struct signal_struct *);
1175 extern void __cleanup_sighand(struct sighand_struct *);
1176 extern void exit_itimers(struct signal_struct *);
1178 extern NORET_TYPE void do_group_exit(int);
1180 extern void daemonize(const char *, ...);
1181 extern int allow_signal(int);
1182 extern int disallow_signal(int);
1183 extern task_t *child_reaper;
1185 extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *);
1186 extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);
1187 task_t *fork_idle(int);
1189 extern void set_task_comm(struct task_struct *tsk, char *from);
1190 extern void get_task_comm(char *to, struct task_struct *tsk);
1193 extern void wait_task_inactive(task_t * p);
1195 #define wait_task_inactive(p) do { } while (0)
1198 #define remove_parent(p) list_del_init(&(p)->sibling)
1199 #define add_parent(p) list_add_tail(&(p)->sibling,&(p)->parent->children)
1201 #define next_task(p) list_entry(rcu_dereference((p)->tasks.next), struct task_struct, tasks)
1203 #define for_each_process(p) \
1204 for (p = &init_task ; (p = next_task(p)) != &init_task ; )
1207 * Careful: do_each_thread/while_each_thread is a double loop so
1208 * 'break' will not work as expected - use goto instead.
1210 #define do_each_thread(g, t) \
1211 for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do
1213 #define while_each_thread(g, t) \
1214 while ((t = next_thread(t)) != g)
1216 /* de_thread depends on thread_group_leader not being a pid based check */
1217 #define thread_group_leader(p) (p == p->group_leader)
1219 static inline task_t *next_thread(const task_t *p)
1221 return list_entry(rcu_dereference(p->thread_group.next),
1222 task_t, thread_group);
1225 static inline int thread_group_empty(task_t *p)
1227 return list_empty(&p->thread_group);
1230 #define delay_group_leader(p) \
1231 (thread_group_leader(p) && !thread_group_empty(p))
1234 * Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring
1235 * subscriptions and synchronises with wait4(). Also used in procfs. Also
1236 * pins the final release of task.io_context. Also protects ->cpuset.
1238 * Nests both inside and outside of read_lock(&tasklist_lock).
1239 * It must not be nested with write_lock_irq(&tasklist_lock),
1240 * neither inside nor outside.
1242 static inline void task_lock(struct task_struct *p)
1244 spin_lock(&p->alloc_lock);
1247 static inline void task_unlock(struct task_struct *p)
1249 spin_unlock(&p->alloc_lock);
1252 extern struct sighand_struct *lock_task_sighand(struct task_struct *tsk,
1253 unsigned long *flags);
1255 static inline void unlock_task_sighand(struct task_struct *tsk,
1256 unsigned long *flags)
1258 spin_unlock_irqrestore(&tsk->sighand->siglock, *flags);
1261 #ifndef __HAVE_THREAD_FUNCTIONS
1263 #define task_thread_info(task) (task)->thread_info
1264 #define task_stack_page(task) ((void*)((task)->thread_info))
1266 static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org)
1268 *task_thread_info(p) = *task_thread_info(org);
1269 task_thread_info(p)->task = p;
1272 static inline unsigned long *end_of_stack(struct task_struct *p)
1274 return (unsigned long *)(p->thread_info + 1);
1279 /* set thread flags in other task's structures
1280 * - see asm/thread_info.h for TIF_xxxx flags available
1282 static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag)
1284 set_ti_thread_flag(task_thread_info(tsk), flag);
1287 static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag)
1289 clear_ti_thread_flag(task_thread_info(tsk), flag);
1292 static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag)
1294 return test_and_set_ti_thread_flag(task_thread_info(tsk), flag);
1297 static inline int test_and_clear_tsk_thread_flag(struct task_struct *tsk, int flag)
1299 return test_and_clear_ti_thread_flag(task_thread_info(tsk), flag);
1302 static inline int test_tsk_thread_flag(struct task_struct *tsk, int flag)
1304 return test_ti_thread_flag(task_thread_info(tsk), flag);
1307 static inline void set_tsk_need_resched(struct task_struct *tsk)
1309 set_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
1312 static inline void clear_tsk_need_resched(struct task_struct *tsk)
1314 clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
1317 static inline int signal_pending(struct task_struct *p)
1319 return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));
1322 static inline int need_resched(void)
1324 return unlikely(test_thread_flag(TIF_NEED_RESCHED));
1328 * cond_resched() and cond_resched_lock(): latency reduction via
1329 * explicit rescheduling in places that are safe. The return
1330 * value indicates whether a reschedule was done in fact.
1331 * cond_resched_lock() will drop the spinlock before scheduling,
1332 * cond_resched_softirq() will enable bhs before scheduling.
1334 extern int cond_resched(void);
1335 extern int cond_resched_lock(spinlock_t * lock);
1336 extern int cond_resched_softirq(void);
1339 * Does a critical section need to be broken due to another
1342 #if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP)
1343 # define need_lockbreak(lock) ((lock)->break_lock)
1345 # define need_lockbreak(lock) 0
1349 * Does a critical section need to be broken due to another
1350 * task waiting or preemption being signalled:
1352 static inline int lock_need_resched(spinlock_t *lock)
1354 if (need_lockbreak(lock) || need_resched())
1359 /* Reevaluate whether the task has signals pending delivery.
1360 This is required every time the blocked sigset_t changes.
1361 callers must hold sighand->siglock. */
1363 extern FASTCALL(void recalc_sigpending_tsk(struct task_struct *t));
1364 extern void recalc_sigpending(void);
1366 extern void signal_wake_up(struct task_struct *t, int resume_stopped);
1369 * Wrappers for p->thread_info->cpu access. No-op on UP.
1373 static inline unsigned int task_cpu(const struct task_struct *p)
1375 return task_thread_info(p)->cpu;
1378 static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
1380 task_thread_info(p)->cpu = cpu;
1385 static inline unsigned int task_cpu(const struct task_struct *p)
1390 static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
1394 #endif /* CONFIG_SMP */
1396 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
1397 extern void arch_pick_mmap_layout(struct mm_struct *mm);
1399 static inline void arch_pick_mmap_layout(struct mm_struct *mm)
1401 mm->mmap_base = TASK_UNMAPPED_BASE;
1402 mm->get_unmapped_area = arch_get_unmapped_area;
1403 mm->unmap_area = arch_unmap_area;
1407 extern long sched_setaffinity(pid_t pid, cpumask_t new_mask);
1408 extern long sched_getaffinity(pid_t pid, cpumask_t *mask);
1410 extern void normalize_rt_tasks(void);
1414 * Check if a process has been frozen
1416 static inline int frozen(struct task_struct *p)
1418 return p->flags & PF_FROZEN;
1422 * Check if there is a request to freeze a process
1424 static inline int freezing(struct task_struct *p)
1426 return p->flags & PF_FREEZE;
1430 * Request that a process be frozen
1431 * FIXME: SMP problem. We may not modify other process' flags!
1433 static inline void freeze(struct task_struct *p)
1435 p->flags |= PF_FREEZE;
1439 * Wake up a frozen process
1441 static inline int thaw_process(struct task_struct *p)
1444 p->flags &= ~PF_FROZEN;
1452 * freezing is complete, mark process as frozen
1454 static inline void frozen_process(struct task_struct *p)
1456 p->flags = (p->flags & ~PF_FREEZE) | PF_FROZEN;
1459 extern void refrigerator(void);
1460 extern int freeze_processes(void);
1461 extern void thaw_processes(void);
1463 static inline int try_to_freeze(void)
1465 if (freezing(current)) {
1472 static inline int frozen(struct task_struct *p) { return 0; }
1473 static inline int freezing(struct task_struct *p) { return 0; }
1474 static inline void freeze(struct task_struct *p) { BUG(); }
1475 static inline int thaw_process(struct task_struct *p) { return 1; }
1476 static inline void frozen_process(struct task_struct *p) { BUG(); }
1478 static inline void refrigerator(void) {}
1479 static inline int freeze_processes(void) { BUG(); return 0; }
1480 static inline void thaw_processes(void) {}
1482 static inline int try_to_freeze(void) { return 0; }
1484 #endif /* CONFIG_PM */
1485 #endif /* __KERNEL__ */