4 #include <asm/param.h> /* for HZ */
6 #include <linux/config.h>
7 #include <linux/capability.h>
8 #include <linux/threads.h>
9 #include <linux/kernel.h>
10 #include <linux/types.h>
11 #include <linux/timex.h>
12 #include <linux/jiffies.h>
13 #include <linux/rbtree.h>
14 #include <linux/thread_info.h>
15 #include <linux/cpumask.h>
16 #include <linux/errno.h>
17 #include <linux/nodemask.h>
18 #include <linux/vs_base.h>
20 #include <asm/system.h>
21 #include <asm/semaphore.h>
23 #include <asm/ptrace.h>
25 #include <asm/cputime.h>
27 #include <linux/smp.h>
28 #include <linux/sem.h>
29 #include <linux/signal.h>
30 #include <linux/securebits.h>
31 #include <linux/fs_struct.h>
32 #include <linux/compiler.h>
33 #include <linux/completion.h>
34 #include <linux/pid.h>
35 #include <linux/percpu.h>
36 #include <linux/topology.h>
37 #include <linux/seccomp.h>
38 #include <linux/rcupdate.h>
39 #include <linux/futex.h>
41 #include <linux/auxvec.h> /* For AT_VECTOR_SIZE */
44 extern int exec_shield;
45 extern int print_fatal_signals;
50 #define CSIGNAL 0x000000ff /* signal mask to be sent at exit */
51 #define CLONE_VM 0x00000100 /* set if VM shared between processes */
52 #define CLONE_FS 0x00000200 /* set if fs info shared between processes */
53 #define CLONE_FILES 0x00000400 /* set if open files shared between processes */
54 #define CLONE_SIGHAND 0x00000800 /* set if signal handlers and blocked signals shared */
55 #define CLONE_PTRACE 0x00002000 /* set if we want to let tracing continue on the child too */
56 #define CLONE_VFORK 0x00004000 /* set if the parent wants the child to wake it up on mm_release */
57 #define CLONE_PARENT 0x00008000 /* set if we want to have the same parent as the cloner */
58 #define CLONE_THREAD 0x00010000 /* Same thread group? */
59 #define CLONE_NEWNS 0x00020000 /* New namespace group? */
60 #define CLONE_SYSVSEM 0x00040000 /* share system V SEM_UNDO semantics */
61 #define CLONE_SETTLS 0x00080000 /* create a new TLS for the child */
62 #define CLONE_PARENT_SETTID 0x00100000 /* set the TID in the parent */
63 #define CLONE_CHILD_CLEARTID 0x00200000 /* clear the TID in the child */
64 #define CLONE_DETACHED 0x00400000 /* Unused, ignored */
65 #define CLONE_UNTRACED 0x00800000 /* set if the tracing process can't force CLONE_PTRACE on this clone */
66 #define CLONE_CHILD_SETTID 0x01000000 /* set the TID in the child */
67 #define CLONE_STOPPED 0x02000000 /* Start in stopped state */
70 * List of flags we want to share for kernel threads,
71 * if only because they are not used by them anyway.
73 #define CLONE_KERNEL (CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
76 * These are the constant used to fake the fixed-point load-average
77 * counting. Some notes:
78 * - 11 bit fractions expand to 22 bits by the multiplies: this gives
79 * a load-average precision of 10 bits integer + 11 bits fractional
80 * - if you want to count load-averages more often, you need more
81 * precision, or rounding will get you. With 2-second counting freq,
82 * the EXP_n values would be 1981, 2034 and 2043 if still using only
85 extern unsigned long avenrun[]; /* Load averages */
87 #define FSHIFT 11 /* nr of bits of precision */
88 #define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */
89 #define LOAD_FREQ (5*HZ) /* 5 sec intervals */
90 #define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */
91 #define EXP_5 2014 /* 1/exp(5sec/5min) */
92 #define EXP_15 2037 /* 1/exp(5sec/15min) */
94 #define CALC_LOAD(load,exp,n) \
96 load += n*(FIXED_1-exp); \
99 extern unsigned long total_forks;
100 extern int nr_threads;
102 DECLARE_PER_CPU(unsigned long, process_counts);
103 extern int nr_processes(void);
104 extern unsigned long nr_running(void);
105 extern unsigned long nr_uninterruptible(void);
106 extern unsigned long nr_active(void);
107 extern unsigned long nr_iowait(void);
109 #include <linux/time.h>
110 #include <linux/param.h>
111 #include <linux/resource.h>
112 #include <linux/timer.h>
113 #include <linux/hrtimer.h>
115 #include <asm/processor.h>
118 * Task state bitmask. NOTE! These bits are also
119 * encoded in fs/proc/array.c: get_task_state().
121 * We have two separate sets of flags: task->state
122 * is about runnability, while task->exit_state are
123 * about the task exiting. Confusing, but this way
124 * modifying one set can't modify the other one by
127 #define TASK_RUNNING 0
128 #define TASK_INTERRUPTIBLE 1
129 #define TASK_UNINTERRUPTIBLE 2
130 #define TASK_STOPPED 4
131 #define TASK_TRACED 8
132 /* in tsk->exit_state */
133 #define EXIT_ZOMBIE 16
135 /* in tsk->state again */
136 #define TASK_NONINTERACTIVE 64
137 #define TASK_ONHOLD 128
139 #define __set_task_state(tsk, state_value) \
140 do { (tsk)->state = (state_value); } while (0)
141 #define set_task_state(tsk, state_value) \
142 set_mb((tsk)->state, (state_value))
145 * set_current_state() includes a barrier so that the write of current->state
146 * is correctly serialised wrt the caller's subsequent test of whether to
149 * set_current_state(TASK_UNINTERRUPTIBLE);
150 * if (do_i_need_to_sleep())
153 * If the caller does not need such serialisation then use __set_current_state()
155 #define __set_current_state(state_value) \
156 do { current->state = (state_value); } while (0)
157 #define set_current_state(state_value) \
158 set_mb(current->state, (state_value))
160 /* Task command name length */
161 #define TASK_COMM_LEN 16
164 * Scheduling policies
166 #define SCHED_NORMAL 0
169 #define SCHED_BATCH 3
177 #include <linux/spinlock.h>
180 * This serializes "schedule()" and also protects
181 * the run-queue from deletions/modifications (but
182 * _adding_ to the beginning of the run-queue has
185 extern rwlock_t tasklist_lock;
186 extern spinlock_t mmlist_lock;
188 typedef struct task_struct task_t;
190 extern void sched_init(void);
191 extern void sched_init_smp(void);
192 extern void init_idle(task_t *idle, int cpu);
194 extern cpumask_t nohz_cpu_mask;
196 extern void show_state(void);
197 extern void show_regs(struct pt_regs *);
200 * TASK is a pointer to the task whose backtrace we want to see (or NULL for current
201 * task), SP is the stack pointer of the first frame that should be shown in the back
202 * trace (or NULL if the entire call-chain of the task should be shown).
204 extern void show_stack(struct task_struct *task, unsigned long *sp);
206 void io_schedule(void);
207 long io_schedule_timeout(long timeout);
209 extern void cpu_init (void);
210 extern void trap_init(void);
211 extern void update_process_times(int user);
212 extern void scheduler_tick(void);
214 #ifdef CONFIG_DETECT_SOFTLOCKUP
215 extern void softlockup_tick(void);
216 extern void spawn_softlockup_task(void);
217 extern void touch_softlockup_watchdog(void);
219 static inline void softlockup_tick(void)
222 static inline void spawn_softlockup_task(void)
225 static inline void touch_softlockup_watchdog(void)
231 /* Attach to any functions which should be ignored in wchan output. */
232 #define __sched __attribute__((__section__(".sched.text")))
233 /* Is this address in the __sched functions? */
234 extern int in_sched_functions(unsigned long addr);
236 #define MAX_SCHEDULE_TIMEOUT LONG_MAX
237 extern signed long FASTCALL(schedule_timeout(signed long timeout));
238 extern signed long schedule_timeout_interruptible(signed long timeout);
239 extern signed long schedule_timeout_uninterruptible(signed long timeout);
240 asmlinkage void schedule(void);
244 /* Maximum number of active map areas.. This is a random (large) number */
245 #define DEFAULT_MAX_MAP_COUNT 65536
247 extern int sysctl_max_map_count;
249 #include <linux/aio.h>
252 arch_get_unmapped_area(struct file *, unsigned long, unsigned long,
253 unsigned long, unsigned long);
256 arch_get_unmapped_exec_area(struct file *, unsigned long, unsigned long,
257 unsigned long, unsigned long);
259 arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
260 unsigned long len, unsigned long pgoff,
261 unsigned long flags);
262 extern void arch_unmap_area(struct mm_struct *, unsigned long);
263 extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
265 #if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
267 * The mm counters are not protected by its page_table_lock,
268 * so must be incremented atomically.
270 typedef atomic_long_t mm_counter_t;
271 #define __set_mm_counter(mm, member, value) \
272 atomic_long_set(&(mm)->_##member, value)
273 #define get_mm_counter(mm, member) \
274 ((unsigned long)atomic_long_read(&(mm)->_##member))
276 #else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
278 * The mm counters are protected by its page_table_lock,
279 * so can be incremented directly.
281 typedef unsigned long mm_counter_t;
282 #define __set_mm_counter(mm, member, value) (mm)->_##member = (value)
283 #define get_mm_counter(mm, member) ((mm)->_##member)
285 #endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
287 #define set_mm_counter(mm, member, value) \
288 vx_ ## member ## pages_sub((mm), (get_mm_counter(mm, member) - value))
289 #define add_mm_counter(mm, member, value) \
290 vx_ ## member ## pages_add((mm), (value))
291 #define inc_mm_counter(mm, member) vx_ ## member ## pages_inc((mm))
292 #define dec_mm_counter(mm, member) vx_ ## member ## pages_dec((mm))
294 #define get_mm_rss(mm) \
295 (get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss))
296 #define update_hiwater_rss(mm) do { \
297 unsigned long _rss = get_mm_rss(mm); \
298 if ((mm)->hiwater_rss < _rss) \
299 (mm)->hiwater_rss = _rss; \
301 #define update_hiwater_vm(mm) do { \
302 if ((mm)->hiwater_vm < (mm)->total_vm) \
303 (mm)->hiwater_vm = (mm)->total_vm; \
307 struct vm_area_struct * mmap; /* list of VMAs */
308 struct rb_root mm_rb;
309 struct vm_area_struct * mmap_cache; /* last find_vma result */
310 unsigned long (*get_unmapped_area) (struct file *filp,
311 unsigned long addr, unsigned long len,
312 unsigned long pgoff, unsigned long flags);
313 unsigned long (*get_unmapped_exec_area) (struct file *filp,
314 unsigned long addr, unsigned long len,
315 unsigned long pgoff, unsigned long flags);
316 void (*unmap_area) (struct mm_struct *mm, unsigned long addr);
317 unsigned long mmap_base; /* base of mmap area */
318 unsigned long task_size; /* size of task vm space */
319 unsigned long cached_hole_size; /* if non-zero, the largest hole below free_area_cache */
320 unsigned long free_area_cache; /* first hole of size cached_hole_size or larger */
322 atomic_t mm_users; /* How many users with user space? */
323 atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */
324 int map_count; /* number of VMAs */
325 struct rw_semaphore mmap_sem;
326 spinlock_t page_table_lock; /* Protects page tables and some counters */
328 struct list_head mmlist; /* List of maybe swapped mm's. These are globally strung
329 * together off init_mm.mmlist, and are protected
333 /* Special counters, in some configurations protected by the
334 * page_table_lock, in other configurations by being atomic.
336 mm_counter_t _file_rss;
337 mm_counter_t _anon_rss;
339 unsigned long hiwater_rss; /* High-watermark of RSS usage */
340 unsigned long hiwater_vm; /* High-water virtual memory usage */
342 unsigned long total_vm, locked_vm, shared_vm, exec_vm;
343 unsigned long stack_vm, reserved_vm, def_flags, nr_ptes;
344 unsigned long start_code, end_code, start_data, end_data;
345 unsigned long start_brk, brk, start_stack;
346 unsigned long arg_start, arg_end, env_start, env_end;
348 unsigned long saved_auxv[AT_VECTOR_SIZE]; /* for /proc/PID/auxv */
351 cpumask_t cpu_vm_mask;
353 /* Architecture-specific MM context */
354 mm_context_t context;
355 struct vx_info *mm_vx_info;
357 /* Token based thrashing protection. */
358 unsigned long swap_token_time;
361 /* coredumping support */
363 struct completion *core_startup_done, core_done;
366 rwlock_t ioctx_list_lock;
367 struct kioctx *ioctx_list;
370 struct sighand_struct {
372 struct k_sigaction action[_NSIG];
377 * NOTE! "signal_struct" does not have it's own
378 * locking, because a shared signal_struct always
379 * implies a shared sighand_struct, so locking
380 * sighand_struct is always a proper superset of
381 * the locking of signal_struct.
383 struct signal_struct {
387 wait_queue_head_t wait_chldexit; /* for wait4() */
389 /* current thread group signal load-balancing target: */
392 /* shared signal handling: */
393 struct sigpending shared_pending;
395 /* thread group exit support */
398 * - notify group_exit_task when ->count is equal to notify_count
399 * - everyone except group_exit_task is stopped during signal delivery
400 * of fatal signals, group_exit_task processes the signal.
402 struct task_struct *group_exit_task;
405 /* thread group stop support, overloads group_exit_code too */
406 int group_stop_count;
407 unsigned int flags; /* see SIGNAL_* flags below */
409 /* POSIX.1b Interval Timers */
410 struct list_head posix_timers;
412 /* ITIMER_REAL timer for the process */
413 struct hrtimer real_timer;
414 struct task_struct *tsk;
415 ktime_t it_real_incr;
417 /* ITIMER_PROF and ITIMER_VIRTUAL timers for the process */
418 cputime_t it_prof_expires, it_virt_expires;
419 cputime_t it_prof_incr, it_virt_incr;
421 /* job control IDs */
425 /* boolean value for session group leader */
428 struct tty_struct *tty; /* NULL if no tty */
431 * Cumulative resource counters for dead threads in the group,
432 * and for reaped dead child processes forked by this group.
433 * Live threads maintain their own counters and add to these
434 * in __exit_signal, except for the group leader.
436 cputime_t utime, stime, cutime, cstime;
437 unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
438 unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
441 * Cumulative ns of scheduled CPU time for dead threads in the
442 * group, not including a zombie group leader. (This only differs
443 * from jiffies_to_ns(utime + stime) if sched_clock uses something
444 * other than jiffies.)
446 unsigned long long sched_time;
449 * We don't bother to synchronize most readers of this at all,
450 * because there is no reader checking a limit that actually needs
451 * to get both rlim_cur and rlim_max atomically, and either one
452 * alone is a single word that can safely be read normally.
453 * getrlimit/setrlimit use task_lock(current->group_leader) to
454 * protect this instead of the siglock, because they really
455 * have no need to disable irqs.
457 struct rlimit rlim[RLIM_NLIMITS];
459 struct list_head cpu_timers[3];
461 /* keep the process-shared keyrings here so that they do the right
462 * thing in threads created with CLONE_THREAD */
464 struct key *session_keyring; /* keyring inherited over fork */
465 struct key *process_keyring; /* keyring private to this process */
469 /* Context switch must be unlocked if interrupts are to be enabled */
470 #ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW
471 # define __ARCH_WANT_UNLOCKED_CTXSW
475 * Bits in flags field of signal_struct.
477 #define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */
478 #define SIGNAL_STOP_DEQUEUED 0x00000002 /* stop signal dequeued */
479 #define SIGNAL_STOP_CONTINUED 0x00000004 /* SIGCONT since WCONTINUED reap */
480 #define SIGNAL_GROUP_EXIT 0x00000008 /* group exit in progress */
484 * Priority of a process goes from 0..MAX_PRIO-1, valid RT
485 * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
486 * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority
487 * values are inverted: lower p->prio value means higher priority.
489 * The MAX_USER_RT_PRIO value allows the actual maximum
490 * RT priority to be separate from the value exported to
491 * user-space. This allows kernel threads to set their
492 * priority to a value higher than any user task. Note:
493 * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.
496 #define MAX_USER_RT_PRIO 100
497 #define MAX_RT_PRIO MAX_USER_RT_PRIO
499 #define MAX_PRIO (MAX_RT_PRIO + 40)
501 #define rt_task(p) (unlikely((p)->prio < MAX_RT_PRIO))
502 #define batch_task(p) (unlikely((p)->policy == SCHED_BATCH))
505 * Some day this will be a full-fledged user tracking system..
508 atomic_t __count; /* reference count */
509 atomic_t processes; /* How many processes does this user have? */
510 atomic_t files; /* How many open files does this user have? */
511 atomic_t sigpending; /* How many pending signals does this user have? */
512 #ifdef CONFIG_INOTIFY
513 atomic_t inotify_watches; /* How many inotify watches does this user have? */
514 atomic_t inotify_devs; /* How many inotify devs does this user have opened? */
516 /* protected by mq_lock */
517 unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
518 unsigned long locked_shm; /* How many pages of mlocked shm ? */
521 struct key *uid_keyring; /* UID specific keyring */
522 struct key *session_keyring; /* UID's default session keyring */
525 /* Hash table maintenance information */
526 struct list_head uidhash_list;
531 extern struct user_struct *find_user(xid_t, uid_t);
533 extern struct user_struct root_user;
534 #define INIT_USER (&root_user)
536 typedef struct prio_array prio_array_t;
537 struct backing_dev_info;
538 struct reclaim_state;
540 #ifdef CONFIG_SCHEDSTATS
542 /* cumulative counters */
543 unsigned long cpu_time, /* time spent on the cpu */
544 run_delay, /* time spent waiting on a runqueue */
545 pcnt; /* # of timeslices run on this cpu */
548 unsigned long last_arrival, /* when we last ran on a cpu */
549 last_queued; /* when we were last queued to run */
552 extern struct file_operations proc_schedstat_operations;
564 * sched-domains (multiprocessor balancing) declarations:
567 #define SCHED_LOAD_SCALE 128UL /* increase resolution of load */
569 #define SD_LOAD_BALANCE 1 /* Do load balancing on this domain. */
570 #define SD_BALANCE_NEWIDLE 2 /* Balance when about to become idle */
571 #define SD_BALANCE_EXEC 4 /* Balance on exec */
572 #define SD_BALANCE_FORK 8 /* Balance on fork, clone */
573 #define SD_WAKE_IDLE 16 /* Wake to idle CPU on task wakeup */
574 #define SD_WAKE_AFFINE 32 /* Wake task to waking CPU */
575 #define SD_WAKE_BALANCE 64 /* Perform balancing at task wakeup */
576 #define SD_SHARE_CPUPOWER 128 /* Domain members share cpu power */
579 struct sched_group *next; /* Must be a circular list */
583 * CPU power of this group, SCHED_LOAD_SCALE being max power for a
584 * single CPU. This is read only (except for setup, hotplug CPU).
586 unsigned long cpu_power;
589 struct sched_domain {
590 /* These fields must be setup */
591 struct sched_domain *parent; /* top domain must be null terminated */
592 struct sched_group *groups; /* the balancing groups of the domain */
593 cpumask_t span; /* span of all CPUs in this domain */
594 unsigned long min_interval; /* Minimum balance interval ms */
595 unsigned long max_interval; /* Maximum balance interval ms */
596 unsigned int busy_factor; /* less balancing by factor if busy */
597 unsigned int imbalance_pct; /* No balance until over watermark */
598 unsigned long long cache_hot_time; /* Task considered cache hot (ns) */
599 unsigned int cache_nice_tries; /* Leave cache hot tasks for # tries */
600 unsigned int per_cpu_gain; /* CPU % gained by adding domain cpus */
601 unsigned int busy_idx;
602 unsigned int idle_idx;
603 unsigned int newidle_idx;
604 unsigned int wake_idx;
605 unsigned int forkexec_idx;
606 int flags; /* See SD_* */
608 /* Runtime fields. */
609 unsigned long last_balance; /* init to jiffies. units in jiffies */
610 unsigned int balance_interval; /* initialise to 1. units in ms. */
611 unsigned int nr_balance_failed; /* initialise to 0 */
613 #ifdef CONFIG_SCHEDSTATS
614 /* load_balance() stats */
615 unsigned long lb_cnt[MAX_IDLE_TYPES];
616 unsigned long lb_failed[MAX_IDLE_TYPES];
617 unsigned long lb_balanced[MAX_IDLE_TYPES];
618 unsigned long lb_imbalance[MAX_IDLE_TYPES];
619 unsigned long lb_gained[MAX_IDLE_TYPES];
620 unsigned long lb_hot_gained[MAX_IDLE_TYPES];
621 unsigned long lb_nobusyg[MAX_IDLE_TYPES];
622 unsigned long lb_nobusyq[MAX_IDLE_TYPES];
624 /* Active load balancing */
625 unsigned long alb_cnt;
626 unsigned long alb_failed;
627 unsigned long alb_pushed;
629 /* SD_BALANCE_EXEC stats */
630 unsigned long sbe_cnt;
631 unsigned long sbe_balanced;
632 unsigned long sbe_pushed;
634 /* SD_BALANCE_FORK stats */
635 unsigned long sbf_cnt;
636 unsigned long sbf_balanced;
637 unsigned long sbf_pushed;
639 /* try_to_wake_up() stats */
640 unsigned long ttwu_wake_remote;
641 unsigned long ttwu_move_affine;
642 unsigned long ttwu_move_balance;
646 extern void partition_sched_domains(cpumask_t *partition1,
647 cpumask_t *partition2);
650 * Maximum cache size the migration-costs auto-tuning code will
653 extern unsigned int max_cache_size;
655 #endif /* CONFIG_SMP */
658 struct io_context; /* See blkdev.h */
659 void exit_io_context(void);
662 #define NGROUPS_SMALL 32
663 #define NGROUPS_PER_BLOCK ((int)(PAGE_SIZE / sizeof(gid_t)))
667 gid_t small_block[NGROUPS_SMALL];
673 * get_group_info() must be called with the owning task locked (via task_lock())
674 * when task != current. The reason being that the vast majority of callers are
675 * looking at current->group_info, which can not be changed except by the
676 * current task. Changing current->group_info requires the task lock, too.
678 #define get_group_info(group_info) do { \
679 atomic_inc(&(group_info)->usage); \
682 #define put_group_info(group_info) do { \
683 if (atomic_dec_and_test(&(group_info)->usage)) \
684 groups_free(group_info); \
687 extern struct group_info *groups_alloc(int gidsetsize);
688 extern void groups_free(struct group_info *group_info);
689 extern int set_current_groups(struct group_info *group_info);
690 extern int groups_search(struct group_info *group_info, gid_t grp);
691 /* access the groups "array" with this macro */
692 #define GROUP_AT(gi, i) \
693 ((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
695 #ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
696 extern void prefetch_stack(struct task_struct*);
698 static inline void prefetch_stack(struct task_struct *t) { }
701 struct audit_context; /* See audit.c */
703 struct pipe_inode_info;
707 SLEEP_NONINTERACTIVE,
713 volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */
714 struct thread_info *thread_info;
716 unsigned long flags; /* per process flags, defined below */
717 unsigned long ptrace;
719 int lock_depth; /* BKL lock depth */
721 #if defined(CONFIG_SMP) && defined(__ARCH_WANT_UNLOCKED_CTXSW)
724 int prio, static_prio;
725 struct list_head run_list;
728 unsigned short ioprio;
729 unsigned int btrace_seq;
731 unsigned long sleep_avg;
732 unsigned long long timestamp, last_ran;
733 unsigned long long sched_time; /* sched_clock time spent running */
734 enum sleep_type sleep_type;
736 unsigned long policy;
737 cpumask_t cpus_allowed;
738 unsigned int time_slice, first_time_slice;
740 #ifdef CONFIG_SCHEDSTATS
741 struct sched_info sched_info;
744 struct list_head tasks;
746 * ptrace_list/ptrace_children forms the list of my children
747 * that were stolen by a ptracer.
749 struct list_head ptrace_children;
750 struct list_head ptrace_list;
752 struct mm_struct *mm, *active_mm;
755 struct linux_binfmt *binfmt;
757 int exit_code, exit_signal;
758 int pdeath_signal; /* The signal sent when the parent dies */
760 unsigned long personality;
765 * pointers to (original) parent process, youngest child, younger sibling,
766 * older sibling, respectively. (p->father can be replaced with
769 struct task_struct *real_parent; /* real parent process (when being debugged) */
770 struct task_struct *parent; /* parent process */
772 * children/sibling forms the list of my children plus the
773 * tasks I'm ptracing.
775 struct list_head children; /* list of my children */
776 struct list_head sibling; /* linkage in my parent's children list */
777 struct task_struct *group_leader; /* threadgroup leader */
779 /* PID/PID hash table linkage. */
780 struct pid_link pids[PIDTYPE_MAX];
781 struct list_head thread_group;
783 struct completion *vfork_done; /* for vfork() */
784 int __user *set_child_tid; /* CLONE_CHILD_SETTID */
785 int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */
787 unsigned long rt_priority;
788 cputime_t utime, stime;
789 unsigned long nvcsw, nivcsw; /* context switch counts */
790 struct timespec start_time;
791 /* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */
792 unsigned long min_flt, maj_flt;
794 cputime_t it_prof_expires, it_virt_expires;
795 unsigned long long it_sched_expires;
796 struct list_head cpu_timers[3];
798 /* process credentials */
799 uid_t uid,euid,suid,fsuid;
800 gid_t gid,egid,sgid,fsgid;
801 struct group_info *group_info;
802 kernel_cap_t cap_effective, cap_inheritable, cap_permitted;
803 unsigned keep_capabilities:1;
804 struct user_struct *user;
806 struct key *request_key_auth; /* assumed request_key authority */
807 struct key *thread_keyring; /* keyring private to this thread */
808 unsigned char jit_keyring; /* default keyring to attach requested keys to */
810 int oomkilladj; /* OOM kill score adjustment (bit shift). */
811 char comm[TASK_COMM_LEN]; /* executable name excluding path
812 - access with [gs]et_task_comm (which lock
814 - initialized normally by flush_old_exec */
815 /* file system info */
816 int link_count, total_link_count;
818 struct sysv_sem sysvsem;
819 /* CPU-specific state of this task */
820 struct thread_struct thread;
821 /* filesystem information */
822 struct fs_struct *fs;
823 /* open file information */
824 struct files_struct *files;
826 struct namespace *namespace;
827 /* signal handlers */
828 struct signal_struct *signal;
829 struct sighand_struct *sighand;
831 sigset_t blocked, real_blocked;
832 sigset_t saved_sigmask; /* To be restored with TIF_RESTORE_SIGMASK */
833 struct sigpending pending;
835 unsigned long sas_ss_sp;
837 int (*notifier)(void *priv);
839 sigset_t *notifier_mask;
843 void (*tux_exit)(void);
847 struct audit_context *audit_context;
849 /* vserver context data */
850 struct vx_info *vx_info;
851 struct nx_info *nx_info;
858 /* Thread group tracking */
861 /* Protection of (de-)allocation: mm, files, fs, tty, keyrings */
862 spinlock_t alloc_lock;
863 /* Protection of proc_dentry: nesting proc_lock, dcache_lock, write_lock_irq(&tasklist_lock); */
864 spinlock_t proc_lock;
866 #ifdef CONFIG_DEBUG_MUTEXES
867 /* mutex deadlock detection */
868 struct mutex_waiter *blocked_on;
871 /* journalling filesystem info */
875 struct reclaim_state *reclaim_state;
877 struct dentry *proc_dentry;
878 struct backing_dev_info *backing_dev_info;
880 struct io_context *io_context;
882 unsigned long ptrace_message;
883 siginfo_t *last_siginfo; /* For ptrace use. */
885 * current io wait handle: wait queue entry to use for io waits
886 * If this thread is processing aio, this points at the waitqueue
887 * inside the currently handled kiocb. It may be NULL (i.e. default
888 * to a stack based synchronous wait) if its doing sync IO.
890 wait_queue_t *io_wait;
891 /* i/o counters(bytes read/written, #syscalls */
892 u64 rchar, wchar, syscr, syscw;
893 #if defined(CONFIG_BSD_PROCESS_ACCT)
894 u64 acct_rss_mem1; /* accumulated rss usage */
895 u64 acct_vm_mem1; /* accumulated virtual memory usage */
896 clock_t acct_stimexpd; /* clock_t-converted stime since last update */
899 struct mempolicy *mempolicy;
902 #ifdef CONFIG_CPUSETS
903 struct cpuset *cpuset;
904 nodemask_t mems_allowed;
905 int cpuset_mems_generation;
906 int cpuset_mem_spread_rotor;
908 struct robust_list_head __user *robust_list;
910 struct compat_robust_list_head __user *compat_robust_list;
913 atomic_t fs_excl; /* holding fs exclusive resources */
917 * cache last used pipe for splice
919 struct pipe_inode_info *splice_pipe;
922 static inline pid_t process_group(struct task_struct *tsk)
924 return tsk->signal->pgrp;
928 * pid_alive - check that a task structure is not stale
929 * @p: Task structure to be checked.
931 * Test if a process is not yet dead (at most zombie state)
932 * If pid_alive fails, then pointers within the task structure
933 * can be stale and must not be dereferenced.
935 static inline int pid_alive(struct task_struct *p)
937 return p->pids[PIDTYPE_PID].pid != NULL;
940 extern void free_task(struct task_struct *tsk);
941 #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
943 extern void __put_task_struct(struct task_struct *t);
945 static inline void put_task_struct(struct task_struct *t)
947 if (atomic_dec_and_test(&t->usage))
948 __put_task_struct(t);
954 #define PF_ALIGNWARN 0x00000001 /* Print alignment warning msgs */
955 /* Not implemented yet, only for 486*/
956 #define PF_STARTING 0x00000002 /* being created */
957 #define PF_EXITING 0x00000004 /* getting shut down */
958 #define PF_DEAD 0x00000008 /* Dead */
959 #define PF_FORKNOEXEC 0x00000040 /* forked but didn't exec */
960 #define PF_SUPERPRIV 0x00000100 /* used super-user privileges */
961 #define PF_DUMPCORE 0x00000200 /* dumped core */
962 #define PF_SIGNALED 0x00000400 /* killed by a signal */
963 #define PF_MEMALLOC 0x00000800 /* Allocating memory */
964 #define PF_FLUSHER 0x00001000 /* responsible for disk writeback */
965 #define PF_USED_MATH 0x00002000 /* if unset the fpu must be initialized before use */
966 #define PF_FREEZE 0x00004000 /* this task is being frozen for suspend now */
967 #define PF_NOFREEZE 0x00008000 /* this thread should not be frozen */
968 #define PF_FROZEN 0x00010000 /* frozen for system suspend */
969 #define PF_FSTRANS 0x00020000 /* inside a filesystem transaction */
970 #define PF_KSWAPD 0x00040000 /* I am kswapd */
971 #define PF_SWAPOFF 0x00080000 /* I am in swapoff */
972 #define PF_LESS_THROTTLE 0x00100000 /* Throttle me less: I clean memory */
973 #define PF_SYNCWRITE 0x00200000 /* I am doing a sync write */
974 #define PF_BORROWED_MM 0x00400000 /* I am a kthread doing use_mm */
975 #define PF_RANDOMIZE 0x00800000 /* randomize virtual address space */
976 #define PF_SWAPWRITE 0x01000000 /* Allowed to write to swap */
977 #define PF_SPREAD_PAGE 0x04000000 /* Spread page cache over cpuset */
978 #define PF_SPREAD_SLAB 0x08000000 /* Spread some slab caches over cpuset */
979 #define PF_MEMPOLICY 0x10000000 /* Non-default NUMA mempolicy */
982 * Only the _current_ task can read/write to tsk->flags, but other
983 * tasks can access tsk->flags in readonly mode for example
984 * with tsk_used_math (like during threaded core dumping).
985 * There is however an exception to this rule during ptrace
986 * or during fork: the ptracer task is allowed to write to the
987 * child->flags of its traced child (same goes for fork, the parent
988 * can write to the child->flags), because we're guaranteed the
989 * child is not running and in turn not changing child->flags
990 * at the same time the parent does it.
992 #define clear_stopped_child_used_math(child) do { (child)->flags &= ~PF_USED_MATH; } while (0)
993 #define set_stopped_child_used_math(child) do { (child)->flags |= PF_USED_MATH; } while (0)
994 #define clear_used_math() clear_stopped_child_used_math(current)
995 #define set_used_math() set_stopped_child_used_math(current)
996 #define conditional_stopped_child_used_math(condition, child) \
997 do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= (condition) ? PF_USED_MATH : 0; } while (0)
998 #define conditional_used_math(condition) \
999 conditional_stopped_child_used_math(condition, current)
1000 #define copy_to_stopped_child_used_math(child) \
1001 do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= current->flags & PF_USED_MATH; } while (0)
1002 /* NOTE: this will return 0 or PF_USED_MATH, it will never return 1 */
1003 #define tsk_used_math(p) ((p)->flags & PF_USED_MATH)
1004 #define used_math() tsk_used_math(current)
1007 extern int set_cpus_allowed(task_t *p, cpumask_t new_mask);
1009 static inline int set_cpus_allowed(task_t *p, cpumask_t new_mask)
1011 if (!cpu_isset(0, new_mask))
1017 extern unsigned long long sched_clock(void);
1018 extern unsigned long long current_sched_time(const task_t *current_task);
1020 /* sched_exec is called by processes performing an exec */
1022 extern void sched_exec(void);
1024 #define sched_exec() {}
1027 #ifdef CONFIG_HOTPLUG_CPU
1028 extern void idle_task_exit(void);
1030 static inline void idle_task_exit(void) {}
1033 extern void sched_idle_next(void);
1034 extern void set_user_nice(task_t *p, long nice);
1035 extern int task_prio(const task_t *p);
1036 extern int task_nice(const task_t *p);
1037 extern int can_nice(const task_t *p, const int nice);
1038 extern int task_curr(const task_t *p);
1039 extern int idle_cpu(int cpu);
1040 extern int sched_setscheduler(struct task_struct *, int, struct sched_param *);
1041 extern task_t *idle_task(int cpu);
1042 extern task_t *curr_task(int cpu);
1043 extern void set_curr_task(int cpu, task_t *p);
1048 * The default (Linux) execution domain.
1050 extern struct exec_domain default_exec_domain;
1052 union thread_union {
1053 struct thread_info thread_info;
1054 unsigned long stack[THREAD_SIZE/sizeof(long)];
1057 #ifndef __HAVE_ARCH_KSTACK_END
1058 static inline int kstack_end(void *addr)
1060 /* Reliable end of stack detection:
1061 * Some APM bios versions misalign the stack
1063 return !(((unsigned long)addr+sizeof(void*)-1) & (THREAD_SIZE-sizeof(void*)));
1067 extern union thread_union init_thread_union;
1068 extern struct task_struct init_task;
1070 extern struct mm_struct init_mm;
1073 #define find_task_by_real_pid(nr) \
1074 find_task_by_pid_type(PIDTYPE_PID, nr)
1075 #define find_task_by_pid(nr) \
1076 find_task_by_pid_type(PIDTYPE_PID, \
1079 extern struct task_struct *find_task_by_pid_type(int type, int pid);
1080 extern void set_special_pids(pid_t session, pid_t pgrp);
1081 extern void __set_special_pids(pid_t session, pid_t pgrp);
1083 /* per-UID process charging. */
1084 extern struct user_struct * alloc_uid(xid_t, uid_t);
1085 static inline struct user_struct *get_uid(struct user_struct *u)
1087 atomic_inc(&u->__count);
1090 extern void free_uid(struct user_struct *);
1091 extern void switch_uid(struct user_struct *);
1093 #include <asm/current.h>
1095 extern void do_timer(struct pt_regs *);
1097 extern int FASTCALL(wake_up_state(struct task_struct * tsk, unsigned int state));
1098 extern int FASTCALL(wake_up_process(struct task_struct * tsk));
1099 extern void FASTCALL(wake_up_new_task(struct task_struct * tsk,
1100 unsigned long clone_flags));
1102 extern void kick_process(struct task_struct *tsk);
1104 static inline void kick_process(struct task_struct *tsk) { }
1106 extern void FASTCALL(sched_fork(task_t * p, int clone_flags));
1107 extern void FASTCALL(sched_exit(task_t * p));
1109 extern int in_group_p(gid_t);
1110 extern int in_egroup_p(gid_t);
1112 extern void proc_caches_init(void);
1113 extern void flush_signals(struct task_struct *);
1114 extern void flush_signal_handlers(struct task_struct *, int force_default);
1115 extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);
1117 static inline int dequeue_signal_lock(struct task_struct *tsk, sigset_t *mask, siginfo_t *info)
1119 unsigned long flags;
1122 spin_lock_irqsave(&tsk->sighand->siglock, flags);
1123 ret = dequeue_signal(tsk, mask, info);
1124 spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
1129 extern void block_all_signals(int (*notifier)(void *priv), void *priv,
1131 extern void unblock_all_signals(void);
1132 extern void release_task(struct task_struct * p);
1133 extern int send_sig_info(int, struct siginfo *, struct task_struct *);
1134 extern int send_group_sig_info(int, struct siginfo *, struct task_struct *);
1135 extern int force_sigsegv(int, struct task_struct *);
1136 extern int force_sig_info(int, struct siginfo *, struct task_struct *);
1137 extern int __kill_pg_info(int sig, struct siginfo *info, pid_t pgrp);
1138 extern int kill_pg_info(int, struct siginfo *, pid_t);
1139 extern int kill_proc_info(int, struct siginfo *, pid_t);
1140 extern int kill_proc_info_as_uid(int, struct siginfo *, pid_t, uid_t, uid_t);
1141 extern void do_notify_parent(struct task_struct *, int);
1142 extern void force_sig(int, struct task_struct *);
1143 extern void force_sig_specific(int, struct task_struct *);
1144 extern int send_sig(int, struct task_struct *, int);
1145 extern void zap_other_threads(struct task_struct *p);
1146 extern int kill_pg(pid_t, int, int);
1147 extern int kill_proc(pid_t, int, int);
1148 extern struct sigqueue *sigqueue_alloc(void);
1149 extern void sigqueue_free(struct sigqueue *);
1150 extern int send_sigqueue(int, struct sigqueue *, struct task_struct *);
1151 extern int send_group_sigqueue(int, struct sigqueue *, struct task_struct *);
1152 extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
1153 extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long);
1155 /* These can be the second arg to send_sig_info/send_group_sig_info. */
1156 #define SEND_SIG_NOINFO ((struct siginfo *) 0)
1157 #define SEND_SIG_PRIV ((struct siginfo *) 1)
1158 #define SEND_SIG_FORCED ((struct siginfo *) 2)
1160 static inline int is_si_special(const struct siginfo *info)
1162 return info <= SEND_SIG_FORCED;
1165 /* True if we are on the alternate signal stack. */
1167 static inline int on_sig_stack(unsigned long sp)
1169 return (sp - current->sas_ss_sp < current->sas_ss_size);
1172 static inline int sas_ss_flags(unsigned long sp)
1174 return (current->sas_ss_size == 0 ? SS_DISABLE
1175 : on_sig_stack(sp) ? SS_ONSTACK : 0);
1179 * Routines for handling mm_structs
1181 extern struct mm_struct * mm_alloc(void);
1183 /* mmdrop drops the mm and the page tables */
1184 extern void FASTCALL(__mmdrop(struct mm_struct *));
1185 static inline void mmdrop(struct mm_struct * mm)
1187 if (atomic_dec_and_test(&mm->mm_count))
1191 /* mmput gets rid of the mappings and all user-space */
1192 extern void mmput(struct mm_struct *);
1193 /* Grab a reference to a task's mm, if it is not already going away */
1194 extern struct mm_struct *get_task_mm(struct task_struct *task);
1195 /* Remove the current tasks stale references to the old mm_struct */
1196 extern void mm_release(struct task_struct *, struct mm_struct *);
1198 extern int copy_thread(int, unsigned long, unsigned long, unsigned long, struct task_struct *, struct pt_regs *);
1199 extern void flush_thread(void);
1200 extern void exit_thread(void);
1202 extern void exit_files(struct task_struct *);
1203 extern void __cleanup_signal(struct signal_struct *);
1204 extern void __cleanup_sighand(struct sighand_struct *);
1205 extern void exit_itimers(struct signal_struct *);
1207 extern NORET_TYPE void do_group_exit(int);
1209 extern void daemonize(const char *, ...);
1210 extern int allow_signal(int);
1211 extern int disallow_signal(int);
1212 extern task_t *child_reaper;
1214 extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *);
1215 extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);
1216 task_t *fork_idle(int);
1218 extern void set_task_comm(struct task_struct *tsk, char *from);
1219 extern void get_task_comm(char *to, struct task_struct *tsk);
1222 extern void wait_task_inactive(task_t * p);
1224 #define wait_task_inactive(p) do { } while (0)
1227 #define remove_parent(p) list_del_init(&(p)->sibling)
1228 #define add_parent(p) list_add_tail(&(p)->sibling,&(p)->parent->children)
1230 #define next_task(p) list_entry(rcu_dereference((p)->tasks.next), struct task_struct, tasks)
1232 #define for_each_process(p) \
1233 for (p = &init_task ; (p = next_task(p)) != &init_task ; )
1236 * Careful: do_each_thread/while_each_thread is a double loop so
1237 * 'break' will not work as expected - use goto instead.
1239 #define do_each_thread(g, t) \
1240 for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do
1242 #define while_each_thread(g, t) \
1243 while ((t = next_thread(t)) != g)
1245 /* de_thread depends on thread_group_leader not being a pid based check */
1246 #define thread_group_leader(p) (p == p->group_leader)
1248 static inline task_t *next_thread(const task_t *p)
1250 return list_entry(rcu_dereference(p->thread_group.next),
1251 task_t, thread_group);
1254 static inline int thread_group_empty(task_t *p)
1256 return list_empty(&p->thread_group);
1259 #define delay_group_leader(p) \
1260 (thread_group_leader(p) && !thread_group_empty(p))
1263 * Protects ->fs, ->files, ->mm, ->ptrace, ->group_info, ->comm, keyring
1264 * subscriptions and synchronises with wait4(). Also used in procfs. Also
1265 * pins the final release of task.io_context. Also protects ->cpuset.
1267 * Nests both inside and outside of read_lock(&tasklist_lock).
1268 * It must not be nested with write_lock_irq(&tasklist_lock),
1269 * neither inside nor outside.
1271 static inline void task_lock(struct task_struct *p)
1273 spin_lock(&p->alloc_lock);
1276 static inline void task_unlock(struct task_struct *p)
1278 spin_unlock(&p->alloc_lock);
1281 extern struct sighand_struct *lock_task_sighand(struct task_struct *tsk,
1282 unsigned long *flags);
1284 static inline void unlock_task_sighand(struct task_struct *tsk,
1285 unsigned long *flags)
1287 spin_unlock_irqrestore(&tsk->sighand->siglock, *flags);
1290 #ifndef __HAVE_THREAD_FUNCTIONS
1292 #define task_thread_info(task) (task)->thread_info
1293 #define task_stack_page(task) ((void*)((task)->thread_info))
1295 static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org)
1297 *task_thread_info(p) = *task_thread_info(org);
1298 task_thread_info(p)->task = p;
1301 static inline unsigned long *end_of_stack(struct task_struct *p)
1303 return (unsigned long *)(p->thread_info + 1);
1308 /* set thread flags in other task's structures
1309 * - see asm/thread_info.h for TIF_xxxx flags available
1311 static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag)
1313 set_ti_thread_flag(task_thread_info(tsk), flag);
1316 static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag)
1318 clear_ti_thread_flag(task_thread_info(tsk), flag);
1321 static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag)
1323 return test_and_set_ti_thread_flag(task_thread_info(tsk), flag);
1326 static inline int test_and_clear_tsk_thread_flag(struct task_struct *tsk, int flag)
1328 return test_and_clear_ti_thread_flag(task_thread_info(tsk), flag);
1331 static inline int test_tsk_thread_flag(struct task_struct *tsk, int flag)
1333 return test_ti_thread_flag(task_thread_info(tsk), flag);
1336 static inline void set_tsk_need_resched(struct task_struct *tsk)
1338 set_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
1341 static inline void clear_tsk_need_resched(struct task_struct *tsk)
1343 clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
1346 static inline int signal_pending(struct task_struct *p)
1348 return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));
1351 static inline int need_resched(void)
1353 return unlikely(test_thread_flag(TIF_NEED_RESCHED));
1357 * cond_resched() and cond_resched_lock(): latency reduction via
1358 * explicit rescheduling in places that are safe. The return
1359 * value indicates whether a reschedule was done in fact.
1360 * cond_resched_lock() will drop the spinlock before scheduling,
1361 * cond_resched_softirq() will enable bhs before scheduling.
1363 extern int cond_resched(void);
1364 extern int cond_resched_lock(spinlock_t * lock);
1365 extern int cond_resched_softirq(void);
1368 * Does a critical section need to be broken due to another
1371 #if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP)
1372 # define need_lockbreak(lock) ((lock)->break_lock)
1374 # define need_lockbreak(lock) 0
1378 * Does a critical section need to be broken due to another
1379 * task waiting or preemption being signalled:
1381 static inline int lock_need_resched(spinlock_t *lock)
1383 if (need_lockbreak(lock) || need_resched())
1388 /* Reevaluate whether the task has signals pending delivery.
1389 This is required every time the blocked sigset_t changes.
1390 callers must hold sighand->siglock. */
1392 extern FASTCALL(void recalc_sigpending_tsk(struct task_struct *t));
1393 extern void recalc_sigpending(void);
1395 extern void signal_wake_up(struct task_struct *t, int resume_stopped);
1398 * Wrappers for p->thread_info->cpu access. No-op on UP.
1402 static inline unsigned int task_cpu(const struct task_struct *p)
1404 return task_thread_info(p)->cpu;
1407 static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
1409 task_thread_info(p)->cpu = cpu;
1414 static inline unsigned int task_cpu(const struct task_struct *p)
1419 static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
1423 #endif /* CONFIG_SMP */
1425 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
1426 extern void arch_pick_mmap_layout(struct mm_struct *mm);
1428 static inline void arch_pick_mmap_layout(struct mm_struct *mm)
1430 mm->mmap_base = TASK_UNMAPPED_BASE;
1431 mm->get_unmapped_area = arch_get_unmapped_area;
1432 mm->unmap_area = arch_unmap_area;
1436 extern long sched_setaffinity(pid_t pid, cpumask_t new_mask);
1437 extern long sched_getaffinity(pid_t pid, cpumask_t *mask);
1439 extern void normalize_rt_tasks(void);
1443 * Check if a process has been frozen
1445 static inline int frozen(struct task_struct *p)
1447 return p->flags & PF_FROZEN;
1451 * Check if there is a request to freeze a process
1453 static inline int freezing(struct task_struct *p)
1455 return p->flags & PF_FREEZE;
1459 * Request that a process be frozen
1460 * FIXME: SMP problem. We may not modify other process' flags!
1462 static inline void freeze(struct task_struct *p)
1464 p->flags |= PF_FREEZE;
1468 * Wake up a frozen process
1470 static inline int thaw_process(struct task_struct *p)
1473 p->flags &= ~PF_FROZEN;
1481 * freezing is complete, mark process as frozen
1483 static inline void frozen_process(struct task_struct *p)
1485 p->flags = (p->flags & ~PF_FREEZE) | PF_FROZEN;
1488 extern void refrigerator(void);
1489 extern int freeze_processes(void);
1490 extern void thaw_processes(void);
1492 static inline int try_to_freeze(void)
1494 if (freezing(current)) {
1501 static inline int frozen(struct task_struct *p) { return 0; }
1502 static inline int freezing(struct task_struct *p) { return 0; }
1503 static inline void freeze(struct task_struct *p) { BUG(); }
1504 static inline int thaw_process(struct task_struct *p) { return 1; }
1505 static inline void frozen_process(struct task_struct *p) { BUG(); }
1507 static inline void refrigerator(void) {}
1508 static inline int freeze_processes(void) { BUG(); return 0; }
1509 static inline void thaw_processes(void) {}
1511 static inline int try_to_freeze(void) { return 0; }
1513 #endif /* CONFIG_PM */
1514 #endif /* __KERNEL__ */