7 #define CSIGNAL 0x000000ff /* signal mask to be sent at exit */
8 #define CLONE_VM 0x00000100 /* set if VM shared between processes */
9 #define CLONE_FS 0x00000200 /* set if fs info shared between processes */
10 #define CLONE_FILES 0x00000400 /* set if open files shared between processes */
11 #define CLONE_SIGHAND 0x00000800 /* set if signal handlers and blocked signals shared */
12 #define CLONE_PTRACE 0x00002000 /* set if we want to let tracing continue on the child too */
13 #define CLONE_VFORK 0x00004000 /* set if the parent wants the child to wake it up on mm_release */
14 #define CLONE_PARENT 0x00008000 /* set if we want to have the same parent as the cloner */
15 #define CLONE_THREAD 0x00010000 /* Same thread group? */
16 #define CLONE_NEWNS 0x00020000 /* New namespace group? */
17 #define CLONE_SYSVSEM 0x00040000 /* share system V SEM_UNDO semantics */
18 #define CLONE_SETTLS 0x00080000 /* create a new TLS for the child */
19 #define CLONE_PARENT_SETTID 0x00100000 /* set the TID in the parent */
20 #define CLONE_CHILD_CLEARTID 0x00200000 /* clear the TID in the child */
21 #define CLONE_DETACHED 0x00400000 /* Unused, ignored */
22 #define CLONE_UNTRACED 0x00800000 /* set if the tracing process can't force CLONE_PTRACE on this clone */
23 #define CLONE_CHILD_SETTID 0x01000000 /* set the TID in the child */
24 #define CLONE_STOPPED 0x02000000 /* Start in stopped state */
25 #define CLONE_NEWUTS 0x04000000 /* New utsname group? */
26 #define CLONE_NEWIPC 0x08000000 /* New ipcs */
27 #define CLONE_NEWUSER 0x10000000 /* New user namespace */
28 #define CLONE_NEWPID 0x20000000 /* New pid namespace */
29 #define CLONE_NEWNET 0x40000000 /* New network namespace */
30 #define CLONE_IO 0x80000000 /* Clone io context */
35 #define SCHED_NORMAL 0
39 /* SCHED_ISO: reserved but not implemented yet */
48 #include <asm/param.h> /* for HZ */
50 #include <linux/capability.h>
51 #include <linux/threads.h>
52 #include <linux/kernel.h>
53 #include <linux/types.h>
54 #include <linux/timex.h>
55 #include <linux/jiffies.h>
56 #include <linux/rbtree.h>
57 #include <linux/thread_info.h>
58 #include <linux/cpumask.h>
59 #include <linux/errno.h>
60 #include <linux/nodemask.h>
61 #include <linux/mm_types.h>
63 #include <asm/system.h>
65 #include <asm/ptrace.h>
66 #include <asm/cputime.h>
68 #include <linux/smp.h>
69 #include <linux/sem.h>
70 #include <linux/signal.h>
71 #include <linux/fs_struct.h>
72 #include <linux/compiler.h>
73 #include <linux/completion.h>
74 #include <linux/pid.h>
75 #include <linux/percpu.h>
76 #include <linux/topology.h>
77 #include <linux/proportions.h>
78 #include <linux/seccomp.h>
79 #include <linux/rcupdate.h>
80 #include <linux/rtmutex.h>
82 #include <linux/time.h>
83 #include <linux/param.h>
84 #include <linux/resource.h>
85 #include <linux/timer.h>
86 #include <linux/hrtimer.h>
87 #include <linux/task_io_accounting.h>
88 #include <linux/kobject.h>
89 #include <linux/latencytop.h>
91 #include <asm/processor.h>
95 struct futex_pi_state;
96 struct robust_list_head;
100 * List of flags we want to share for kernel threads,
101 * if only because they are not used by them anyway.
103 #define CLONE_KERNEL (CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
106 * These are the constant used to fake the fixed-point load-average
107 * counting. Some notes:
108 * - 11 bit fractions expand to 22 bits by the multiplies: this gives
109 * a load-average precision of 10 bits integer + 11 bits fractional
110 * - if you want to count load-averages more often, you need more
111 * precision, or rounding will get you. With 2-second counting freq,
112 * the EXP_n values would be 1981, 2034 and 2043 if still using only
115 extern unsigned long avenrun[]; /* Load averages */
117 #define FSHIFT 11 /* nr of bits of precision */
118 #define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */
119 #define LOAD_FREQ (5*HZ+1) /* 5 sec intervals */
120 #define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */
121 #define EXP_5 2014 /* 1/exp(5sec/5min) */
122 #define EXP_15 2037 /* 1/exp(5sec/15min) */
124 #define CALC_LOAD(load,exp,n) \
126 load += n*(FIXED_1-exp); \
129 extern unsigned long total_forks;
130 extern int nr_threads;
131 DECLARE_PER_CPU(unsigned long, process_counts);
132 extern int nr_processes(void);
133 extern unsigned long nr_running(void);
134 extern unsigned long nr_uninterruptible(void);
135 extern unsigned long nr_active(void);
136 extern unsigned long nr_iowait(void);
141 #ifdef CONFIG_SCHED_DEBUG
142 extern void proc_sched_show_task(struct task_struct *p, struct seq_file *m);
143 extern void proc_sched_set_task(struct task_struct *p);
145 print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq);
148 proc_sched_show_task(struct task_struct *p, struct seq_file *m)
151 static inline void proc_sched_set_task(struct task_struct *p)
155 print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
160 extern unsigned long long time_sync_thresh;
163 * Task state bitmask. NOTE! These bits are also
164 * encoded in fs/proc/array.c: get_task_state().
166 * We have two separate sets of flags: task->state
167 * is about runnability, while task->exit_state are
168 * about the task exiting. Confusing, but this way
169 * modifying one set can't modify the other one by
172 #define TASK_RUNNING 0
173 #define TASK_INTERRUPTIBLE 1
174 #define TASK_UNINTERRUPTIBLE 2
175 #define __TASK_STOPPED 4
176 #define __TASK_TRACED 8
177 /* in tsk->exit_state */
178 #define EXIT_ZOMBIE 16
180 /* in tsk->state again */
182 #define TASK_WAKEKILL 128
184 /* Convenience macros for the sake of set_task_state */
185 #define TASK_KILLABLE (TASK_WAKEKILL | TASK_UNINTERRUPTIBLE)
186 #define TASK_STOPPED (TASK_WAKEKILL | __TASK_STOPPED)
187 #define TASK_TRACED (TASK_WAKEKILL | __TASK_TRACED)
189 /* Convenience macros for the sake of wake_up */
190 #define TASK_NORMAL (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE)
191 #define TASK_ALL (TASK_NORMAL | __TASK_STOPPED | __TASK_TRACED)
193 /* get_task_state() */
194 #define TASK_REPORT (TASK_RUNNING | TASK_INTERRUPTIBLE | \
195 TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \
198 #define task_is_traced(task) ((task->state & __TASK_TRACED) != 0)
199 #define task_is_stopped(task) ((task->state & __TASK_STOPPED) != 0)
200 #define task_is_stopped_or_traced(task) \
201 ((task->state & (__TASK_STOPPED | __TASK_TRACED)) != 0)
202 #define task_contributes_to_load(task) \
203 ((task->state & TASK_UNINTERRUPTIBLE) != 0)
205 #define __set_task_state(tsk, state_value) \
206 do { (tsk)->state = (state_value); } while (0)
207 #define set_task_state(tsk, state_value) \
208 set_mb((tsk)->state, (state_value))
211 * set_current_state() includes a barrier so that the write of current->state
212 * is correctly serialised wrt the caller's subsequent test of whether to
215 * set_current_state(TASK_UNINTERRUPTIBLE);
216 * if (do_i_need_to_sleep())
219 * If the caller does not need such serialisation then use __set_current_state()
221 #define __set_current_state(state_value) \
222 do { current->state = (state_value); } while (0)
223 #define set_current_state(state_value) \
224 set_mb(current->state, (state_value))
226 /* Task command name length */
227 #define TASK_COMM_LEN 16
229 #include <linux/spinlock.h>
232 * This serializes "schedule()" and also protects
233 * the run-queue from deletions/modifications (but
234 * _adding_ to the beginning of the run-queue has
237 extern rwlock_t tasklist_lock;
238 extern spinlock_t mmlist_lock;
242 extern void sched_init(void);
243 extern void sched_init_smp(void);
244 extern asmlinkage void schedule_tail(struct task_struct *prev);
245 extern void init_idle(struct task_struct *idle, int cpu);
246 extern void init_idle_bootup_task(struct task_struct *idle);
248 extern int runqueue_is_locked(void);
250 extern cpumask_t nohz_cpu_mask;
251 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)
252 extern int select_nohz_load_balancer(int cpu);
254 static inline int select_nohz_load_balancer(int cpu)
260 extern unsigned long rt_needs_cpu(int cpu);
263 * Only dump TASK_* tasks. (0 for all tasks)
265 extern void show_state_filter(unsigned long state_filter);
267 static inline void show_state(void)
269 show_state_filter(0);
272 extern void show_regs(struct pt_regs *);
275 * TASK is a pointer to the task whose backtrace we want to see (or NULL for current
276 * task), SP is the stack pointer of the first frame that should be shown in the back
277 * trace (or NULL if the entire call-chain of the task should be shown).
279 extern void show_stack(struct task_struct *task, unsigned long *sp);
281 void io_schedule(void);
282 long io_schedule_timeout(long timeout);
284 extern void cpu_init (void);
285 extern void trap_init(void);
286 extern void account_process_tick(struct task_struct *task, int user);
287 extern void update_process_times(int user);
288 extern void scheduler_tick(void);
289 extern void hrtick_resched(void);
291 extern void sched_show_task(struct task_struct *p);
293 #ifdef CONFIG_DETECT_SOFTLOCKUP
294 extern void softlockup_tick(void);
295 extern void touch_softlockup_watchdog(void);
296 extern void touch_all_softlockup_watchdogs(void);
297 extern unsigned int softlockup_panic;
298 extern unsigned long sysctl_hung_task_check_count;
299 extern unsigned long sysctl_hung_task_timeout_secs;
300 extern unsigned long sysctl_hung_task_warnings;
301 extern int softlockup_thresh;
303 static inline void softlockup_tick(void)
306 static inline void spawn_softlockup_task(void)
309 static inline void touch_softlockup_watchdog(void)
312 static inline void touch_all_softlockup_watchdogs(void)
318 /* Attach to any functions which should be ignored in wchan output. */
319 #define __sched __attribute__((__section__(".sched.text")))
321 /* Linker adds these: start and end of __sched functions */
322 extern char __sched_text_start[], __sched_text_end[];
324 /* Is this address in the __sched functions? */
325 extern int in_sched_functions(unsigned long addr);
327 #define MAX_SCHEDULE_TIMEOUT LONG_MAX
328 extern signed long schedule_timeout(signed long timeout);
329 extern signed long schedule_timeout_interruptible(signed long timeout);
330 extern signed long schedule_timeout_killable(signed long timeout);
331 extern signed long schedule_timeout_uninterruptible(signed long timeout);
332 asmlinkage void schedule(void);
335 struct user_namespace;
337 /* Maximum number of active map areas.. This is a random (large) number */
338 #define DEFAULT_MAX_MAP_COUNT 65536
340 extern int sysctl_max_map_count;
342 #include <linux/aio.h>
345 arch_get_unmapped_area(struct file *, unsigned long, unsigned long,
346 unsigned long, unsigned long);
348 arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
349 unsigned long len, unsigned long pgoff,
350 unsigned long flags);
351 extern void arch_unmap_area(struct mm_struct *, unsigned long);
352 extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
354 #if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
356 * The mm counters are not protected by its page_table_lock,
357 * so must be incremented atomically.
359 #define set_mm_counter(mm, member, value) atomic_long_set(&(mm)->_##member, value)
360 #define get_mm_counter(mm, member) ((unsigned long)atomic_long_read(&(mm)->_##member))
361 #define add_mm_counter(mm, member, value) atomic_long_add(value, &(mm)->_##member)
362 #define inc_mm_counter(mm, member) atomic_long_inc(&(mm)->_##member)
363 #define dec_mm_counter(mm, member) atomic_long_dec(&(mm)->_##member)
365 #else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
367 * The mm counters are protected by its page_table_lock,
368 * so can be incremented directly.
370 #define set_mm_counter(mm, member, value) (mm)->_##member = (value)
371 #define get_mm_counter(mm, member) ((mm)->_##member)
372 #define add_mm_counter(mm, member, value) (mm)->_##member += (value)
373 #define inc_mm_counter(mm, member) (mm)->_##member++
374 #define dec_mm_counter(mm, member) (mm)->_##member--
376 #endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
378 #define get_mm_rss(mm) \
379 (get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss))
380 #define update_hiwater_rss(mm) do { \
381 unsigned long _rss = get_mm_rss(mm); \
382 if ((mm)->hiwater_rss < _rss) \
383 (mm)->hiwater_rss = _rss; \
385 #define update_hiwater_vm(mm) do { \
386 if ((mm)->hiwater_vm < (mm)->total_vm) \
387 (mm)->hiwater_vm = (mm)->total_vm; \
390 extern void set_dumpable(struct mm_struct *mm, int value);
391 extern int get_dumpable(struct mm_struct *mm);
395 #define MMF_DUMPABLE 0 /* core dump is permitted */
396 #define MMF_DUMP_SECURELY 1 /* core file is readable only by root */
397 #define MMF_DUMPABLE_BITS 2
399 /* coredump filter bits */
400 #define MMF_DUMP_ANON_PRIVATE 2
401 #define MMF_DUMP_ANON_SHARED 3
402 #define MMF_DUMP_MAPPED_PRIVATE 4
403 #define MMF_DUMP_MAPPED_SHARED 5
404 #define MMF_DUMP_ELF_HEADERS 6
405 #define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS
406 #define MMF_DUMP_FILTER_BITS 5
407 #define MMF_DUMP_FILTER_MASK \
408 (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
409 #define MMF_DUMP_FILTER_DEFAULT \
410 ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED))
412 struct sighand_struct {
414 struct k_sigaction action[_NSIG];
416 wait_queue_head_t signalfd_wqh;
419 struct pacct_struct {
422 unsigned long ac_mem;
423 cputime_t ac_utime, ac_stime;
424 unsigned long ac_minflt, ac_majflt;
428 * NOTE! "signal_struct" does not have it's own
429 * locking, because a shared signal_struct always
430 * implies a shared sighand_struct, so locking
431 * sighand_struct is always a proper superset of
432 * the locking of signal_struct.
434 struct signal_struct {
438 wait_queue_head_t wait_chldexit; /* for wait4() */
440 /* current thread group signal load-balancing target: */
441 struct task_struct *curr_target;
443 /* shared signal handling: */
444 struct sigpending shared_pending;
446 /* thread group exit support */
449 * - notify group_exit_task when ->count is equal to notify_count
450 * - everyone except group_exit_task is stopped during signal delivery
451 * of fatal signals, group_exit_task processes the signal.
453 struct task_struct *group_exit_task;
456 /* thread group stop support, overloads group_exit_code too */
457 int group_stop_count;
458 unsigned int flags; /* see SIGNAL_* flags below */
460 /* POSIX.1b Interval Timers */
461 struct list_head posix_timers;
463 /* ITIMER_REAL timer for the process */
464 struct hrtimer real_timer;
465 struct pid *leader_pid;
466 ktime_t it_real_incr;
468 /* ITIMER_PROF and ITIMER_VIRTUAL timers for the process */
469 cputime_t it_prof_expires, it_virt_expires;
470 cputime_t it_prof_incr, it_virt_incr;
472 /* job control IDs */
475 * pgrp and session fields are deprecated.
476 * use the task_session_Xnr and task_pgrp_Xnr routines below
480 pid_t pgrp __deprecated;
484 struct pid *tty_old_pgrp;
487 pid_t session __deprecated;
491 /* boolean value for session group leader */
494 struct tty_struct *tty; /* NULL if no tty */
497 * Cumulative resource counters for dead threads in the group,
498 * and for reaped dead child processes forked by this group.
499 * Live threads maintain their own counters and add to these
500 * in __exit_signal, except for the group leader.
502 cputime_t utime, stime, cutime, cstime;
505 unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
506 unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
507 unsigned long inblock, oublock, cinblock, coublock;
508 #ifdef CONFIG_TASK_XACCT
509 u64 rchar, wchar, syscr, syscw;
511 struct task_io_accounting ioac;
514 * Cumulative ns of scheduled CPU time for dead threads in the
515 * group, not including a zombie group leader. (This only differs
516 * from jiffies_to_ns(utime + stime) if sched_clock uses something
517 * other than jiffies.)
519 unsigned long long sum_sched_runtime;
522 * We don't bother to synchronize most readers of this at all,
523 * because there is no reader checking a limit that actually needs
524 * to get both rlim_cur and rlim_max atomically, and either one
525 * alone is a single word that can safely be read normally.
526 * getrlimit/setrlimit use task_lock(current->group_leader) to
527 * protect this instead of the siglock, because they really
528 * have no need to disable irqs.
530 struct rlimit rlim[RLIM_NLIMITS];
532 struct list_head cpu_timers[3];
534 /* keep the process-shared keyrings here so that they do the right
535 * thing in threads created with CLONE_THREAD */
537 struct key *session_keyring; /* keyring inherited over fork */
538 struct key *process_keyring; /* keyring private to this process */
540 #ifdef CONFIG_BSD_PROCESS_ACCT
541 struct pacct_struct pacct; /* per-process accounting information */
543 #ifdef CONFIG_TASKSTATS
544 struct taskstats *stats;
548 struct tty_audit_buf *tty_audit_buf;
552 /* Context switch must be unlocked if interrupts are to be enabled */
553 #ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW
554 # define __ARCH_WANT_UNLOCKED_CTXSW
558 * Bits in flags field of signal_struct.
560 #define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */
561 #define SIGNAL_STOP_DEQUEUED 0x00000002 /* stop signal dequeued */
562 #define SIGNAL_STOP_CONTINUED 0x00000004 /* SIGCONT since WCONTINUED reap */
563 #define SIGNAL_GROUP_EXIT 0x00000008 /* group exit in progress */
565 * Pending notifications to parent.
567 #define SIGNAL_CLD_STOPPED 0x00000010
568 #define SIGNAL_CLD_CONTINUED 0x00000020
569 #define SIGNAL_CLD_MASK (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED)
571 #define SIGNAL_UNKILLABLE 0x00000040 /* for init: ignore fatal signals */
573 /* If true, all threads except ->group_exit_task have pending SIGKILL */
574 static inline int signal_group_exit(const struct signal_struct *sig)
576 return (sig->flags & SIGNAL_GROUP_EXIT) ||
577 (sig->group_exit_task != NULL);
581 * Some day this will be a full-fledged user tracking system..
584 atomic_t __count; /* reference count */
585 atomic_t processes; /* How many processes does this user have? */
586 atomic_t files; /* How many open files does this user have? */
587 atomic_t sigpending; /* How many pending signals does this user have? */
588 #ifdef CONFIG_INOTIFY_USER
589 atomic_t inotify_watches; /* How many inotify watches does this user have? */
590 atomic_t inotify_devs; /* How many inotify devs does this user have opened? */
592 #ifdef CONFIG_POSIX_MQUEUE
593 /* protected by mq_lock */
594 unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
596 unsigned long locked_shm; /* How many pages of mlocked shm ? */
599 struct key *uid_keyring; /* UID specific keyring */
600 struct key *session_keyring; /* UID's default session keyring */
603 /* Hash table maintenance information */
604 struct hlist_node uidhash_node;
607 #ifdef CONFIG_USER_SCHED
608 struct task_group *tg;
611 struct work_struct work;
616 extern int uids_sysfs_init(void);
618 extern struct user_struct *find_user(uid_t);
620 extern struct user_struct root_user;
621 #define INIT_USER (&root_user)
623 struct backing_dev_info;
624 struct reclaim_state;
626 #if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
628 /* cumulative counters */
629 unsigned long pcount; /* # of times run on this cpu */
630 unsigned long long cpu_time, /* time spent on the cpu */
631 run_delay; /* time spent waiting on a runqueue */
634 unsigned long long last_arrival,/* when we last ran on a cpu */
635 last_queued; /* when we were last queued to run */
636 #ifdef CONFIG_SCHEDSTATS
638 unsigned int bkl_count;
641 #endif /* defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) */
643 #ifdef CONFIG_SCHEDSTATS
644 extern const struct file_operations proc_schedstat_operations;
645 #endif /* CONFIG_SCHEDSTATS */
647 #ifdef CONFIG_TASK_DELAY_ACCT
648 struct task_delay_info {
650 unsigned int flags; /* Private per-task flags */
652 /* For each stat XXX, add following, aligned appropriately
654 * struct timespec XXX_start, XXX_end;
658 * Atomicity of updates to XXX_delay, XXX_count protected by
659 * single lock above (split into XXX_lock if contention is an issue).
663 * XXX_count is incremented on every XXX operation, the delay
664 * associated with the operation is added to XXX_delay.
665 * XXX_delay contains the accumulated delay time in nanoseconds.
667 struct timespec blkio_start, blkio_end; /* Shared by blkio, swapin */
668 u64 blkio_delay; /* wait for sync block io completion */
669 u64 swapin_delay; /* wait for swapin block io completion */
670 u32 blkio_count; /* total count of the number of sync block */
671 /* io operations performed */
672 u32 swapin_count; /* total count of the number of swapin block */
673 /* io operations performed */
675 struct timespec freepages_start, freepages_end;
676 u64 freepages_delay; /* wait for memory reclaim */
677 u32 freepages_count; /* total count of memory reclaim */
679 #endif /* CONFIG_TASK_DELAY_ACCT */
681 static inline int sched_info_on(void)
683 #ifdef CONFIG_SCHEDSTATS
685 #elif defined(CONFIG_TASK_DELAY_ACCT)
686 extern int delayacct_on;
701 * sched-domains (multiprocessor balancing) declarations:
705 * Increase resolution of nice-level calculations:
707 #define SCHED_LOAD_SHIFT 10
708 #define SCHED_LOAD_SCALE (1L << SCHED_LOAD_SHIFT)
710 #define SCHED_LOAD_SCALE_FUZZ SCHED_LOAD_SCALE
713 #define SD_LOAD_BALANCE 1 /* Do load balancing on this domain. */
714 #define SD_BALANCE_NEWIDLE 2 /* Balance when about to become idle */
715 #define SD_BALANCE_EXEC 4 /* Balance on exec */
716 #define SD_BALANCE_FORK 8 /* Balance on fork, clone */
717 #define SD_WAKE_IDLE 16 /* Wake to idle CPU on task wakeup */
718 #define SD_WAKE_AFFINE 32 /* Wake task to waking CPU */
719 #define SD_WAKE_BALANCE 64 /* Perform balancing at task wakeup */
720 #define SD_SHARE_CPUPOWER 128 /* Domain members share cpu power */
721 #define SD_POWERSAVINGS_BALANCE 256 /* Balance for power savings */
722 #define SD_SHARE_PKG_RESOURCES 512 /* Domain members share cpu pkg resources */
723 #define SD_SERIALIZE 1024 /* Only a single load balancing instance */
724 #define SD_WAKE_IDLE_FAR 2048 /* Gain latency sacrificing cache hit */
726 #define BALANCE_FOR_MC_POWER \
727 (sched_smt_power_savings ? SD_POWERSAVINGS_BALANCE : 0)
729 #define BALANCE_FOR_PKG_POWER \
730 ((sched_mc_power_savings || sched_smt_power_savings) ? \
731 SD_POWERSAVINGS_BALANCE : 0)
733 #define test_sd_parent(sd, flag) ((sd->parent && \
734 (sd->parent->flags & flag)) ? 1 : 0)
738 struct sched_group *next; /* Must be a circular list */
742 * CPU power of this group, SCHED_LOAD_SCALE being max power for a
743 * single CPU. This is read only (except for setup, hotplug CPU).
744 * Note : Never change cpu_power without recompute its reciprocal
746 unsigned int __cpu_power;
748 * reciprocal value of cpu_power to avoid expensive divides
749 * (see include/linux/reciprocal_div.h)
751 u32 reciprocal_cpu_power;
754 enum sched_domain_level {
764 struct sched_domain_attr {
765 int relax_domain_level;
768 #define SD_ATTR_INIT (struct sched_domain_attr) { \
769 .relax_domain_level = -1, \
772 struct sched_domain {
773 /* These fields must be setup */
774 struct sched_domain *parent; /* top domain must be null terminated */
775 struct sched_domain *child; /* bottom domain must be null terminated */
776 struct sched_group *groups; /* the balancing groups of the domain */
777 cpumask_t span; /* span of all CPUs in this domain */
778 unsigned long min_interval; /* Minimum balance interval ms */
779 unsigned long max_interval; /* Maximum balance interval ms */
780 unsigned int busy_factor; /* less balancing by factor if busy */
781 unsigned int imbalance_pct; /* No balance until over watermark */
782 unsigned int cache_nice_tries; /* Leave cache hot tasks for # tries */
783 unsigned int busy_idx;
784 unsigned int idle_idx;
785 unsigned int newidle_idx;
786 unsigned int wake_idx;
787 unsigned int forkexec_idx;
788 int flags; /* See SD_* */
789 enum sched_domain_level level;
791 /* Runtime fields. */
792 unsigned long last_balance; /* init to jiffies. units in jiffies */
793 unsigned int balance_interval; /* initialise to 1. units in ms. */
794 unsigned int nr_balance_failed; /* initialise to 0 */
798 #ifdef CONFIG_SCHEDSTATS
799 /* load_balance() stats */
800 unsigned int lb_count[CPU_MAX_IDLE_TYPES];
801 unsigned int lb_failed[CPU_MAX_IDLE_TYPES];
802 unsigned int lb_balanced[CPU_MAX_IDLE_TYPES];
803 unsigned int lb_imbalance[CPU_MAX_IDLE_TYPES];
804 unsigned int lb_gained[CPU_MAX_IDLE_TYPES];
805 unsigned int lb_hot_gained[CPU_MAX_IDLE_TYPES];
806 unsigned int lb_nobusyg[CPU_MAX_IDLE_TYPES];
807 unsigned int lb_nobusyq[CPU_MAX_IDLE_TYPES];
809 /* Active load balancing */
810 unsigned int alb_count;
811 unsigned int alb_failed;
812 unsigned int alb_pushed;
814 /* SD_BALANCE_EXEC stats */
815 unsigned int sbe_count;
816 unsigned int sbe_balanced;
817 unsigned int sbe_pushed;
819 /* SD_BALANCE_FORK stats */
820 unsigned int sbf_count;
821 unsigned int sbf_balanced;
822 unsigned int sbf_pushed;
824 /* try_to_wake_up() stats */
825 unsigned int ttwu_wake_remote;
826 unsigned int ttwu_move_affine;
827 unsigned int ttwu_move_balance;
831 extern void partition_sched_domains(int ndoms_new, cpumask_t *doms_new,
832 struct sched_domain_attr *dattr_new);
833 extern int arch_reinit_sched_domains(void);
835 #else /* CONFIG_SMP */
837 struct sched_domain_attr;
840 partition_sched_domains(int ndoms_new, cpumask_t *doms_new,
841 struct sched_domain_attr *dattr_new)
844 #endif /* !CONFIG_SMP */
846 struct io_context; /* See blkdev.h */
847 #define NGROUPS_SMALL 32
848 #define NGROUPS_PER_BLOCK ((unsigned int)(PAGE_SIZE / sizeof(gid_t)))
852 gid_t small_block[NGROUPS_SMALL];
858 * get_group_info() must be called with the owning task locked (via task_lock())
859 * when task != current. The reason being that the vast majority of callers are
860 * looking at current->group_info, which can not be changed except by the
861 * current task. Changing current->group_info requires the task lock, too.
863 #define get_group_info(group_info) do { \
864 atomic_inc(&(group_info)->usage); \
867 #define put_group_info(group_info) do { \
868 if (atomic_dec_and_test(&(group_info)->usage)) \
869 groups_free(group_info); \
872 extern struct group_info *groups_alloc(int gidsetsize);
873 extern void groups_free(struct group_info *group_info);
874 extern int set_current_groups(struct group_info *group_info);
875 extern int groups_search(struct group_info *group_info, gid_t grp);
876 /* access the groups "array" with this macro */
877 #define GROUP_AT(gi, i) \
878 ((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
880 #ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
881 extern void prefetch_stack(struct task_struct *t);
883 static inline void prefetch_stack(struct task_struct *t) { }
886 struct audit_context; /* See audit.c */
888 struct pipe_inode_info;
889 struct uts_namespace;
895 const struct sched_class *next;
897 void (*enqueue_task) (struct rq *rq, struct task_struct *p, int wakeup);
898 void (*dequeue_task) (struct rq *rq, struct task_struct *p, int sleep);
899 void (*yield_task) (struct rq *rq);
900 int (*select_task_rq)(struct task_struct *p, int sync);
902 void (*check_preempt_curr) (struct rq *rq, struct task_struct *p);
904 struct task_struct * (*pick_next_task) (struct rq *rq);
905 void (*put_prev_task) (struct rq *rq, struct task_struct *p);
908 unsigned long (*load_balance) (struct rq *this_rq, int this_cpu,
909 struct rq *busiest, unsigned long max_load_move,
910 struct sched_domain *sd, enum cpu_idle_type idle,
911 int *all_pinned, int *this_best_prio);
913 int (*move_one_task) (struct rq *this_rq, int this_cpu,
914 struct rq *busiest, struct sched_domain *sd,
915 enum cpu_idle_type idle);
916 void (*pre_schedule) (struct rq *this_rq, struct task_struct *task);
917 void (*post_schedule) (struct rq *this_rq);
918 void (*task_wake_up) (struct rq *this_rq, struct task_struct *task);
921 void (*set_curr_task) (struct rq *rq);
922 void (*task_tick) (struct rq *rq, struct task_struct *p, int queued);
923 void (*task_new) (struct rq *rq, struct task_struct *p);
924 void (*set_cpus_allowed)(struct task_struct *p,
925 const cpumask_t *newmask);
927 void (*rq_online)(struct rq *rq);
928 void (*rq_offline)(struct rq *rq);
930 void (*switched_from) (struct rq *this_rq, struct task_struct *task,
932 void (*switched_to) (struct rq *this_rq, struct task_struct *task,
934 void (*prio_changed) (struct rq *this_rq, struct task_struct *task,
935 int oldprio, int running);
937 #ifdef CONFIG_FAIR_GROUP_SCHED
938 void (*moved_group) (struct task_struct *p);
943 unsigned long weight, inv_weight;
947 * CFS stats for a schedulable entity (task, task-group etc)
949 * Current field usage histogram:
956 struct sched_entity {
957 struct load_weight load; /* for load-balancing */
958 struct rb_node run_node;
959 struct list_head group_node;
963 u64 sum_exec_runtime;
965 u64 prev_sum_exec_runtime;
970 #ifdef CONFIG_SCHEDSTATS
978 s64 sum_sleep_runtime;
986 u64 nr_migrations_cold;
987 u64 nr_failed_migrations_affine;
988 u64 nr_failed_migrations_running;
989 u64 nr_failed_migrations_hot;
990 u64 nr_forced_migrations;
991 u64 nr_forced2_migrations;
995 u64 nr_wakeups_migrate;
996 u64 nr_wakeups_local;
997 u64 nr_wakeups_remote;
998 u64 nr_wakeups_affine;
999 u64 nr_wakeups_affine_attempts;
1000 u64 nr_wakeups_passive;
1001 u64 nr_wakeups_idle;
1004 #ifdef CONFIG_FAIR_GROUP_SCHED
1005 struct sched_entity *parent;
1006 /* rq on which this entity is (to be) queued: */
1007 struct cfs_rq *cfs_rq;
1008 /* rq "owned" by this entity/group: */
1009 struct cfs_rq *my_q;
1013 struct sched_rt_entity {
1014 struct list_head run_list;
1015 unsigned int time_slice;
1016 unsigned long timeout;
1017 int nr_cpus_allowed;
1019 struct sched_rt_entity *back;
1020 #ifdef CONFIG_RT_GROUP_SCHED
1021 struct sched_rt_entity *parent;
1022 /* rq on which this entity is (to be) queued: */
1023 struct rt_rq *rt_rq;
1024 /* rq "owned" by this entity/group: */
1029 struct task_struct {
1030 volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */
1033 unsigned int flags; /* per process flags, defined below */
1034 unsigned int ptrace;
1036 int lock_depth; /* BKL lock depth */
1039 #ifdef __ARCH_WANT_UNLOCKED_CTXSW
1044 int prio, static_prio, normal_prio;
1045 unsigned int rt_priority;
1046 const struct sched_class *sched_class;
1047 struct sched_entity se;
1048 struct sched_rt_entity rt;
1050 #ifdef CONFIG_PREEMPT_NOTIFIERS
1051 /* list of struct preempt_notifier: */
1052 struct hlist_head preempt_notifiers;
1056 * fpu_counter contains the number of consecutive context switches
1057 * that the FPU is used. If this is over a threshold, the lazy fpu
1058 * saving becomes unlazy to save the trap. This is an unsigned char
1059 * so that after 256 times the counter wraps and the behavior turns
1060 * lazy again; this to deal with bursty apps that only use FPU for
1063 unsigned char fpu_counter;
1064 s8 oomkilladj; /* OOM kill score adjustment (bit shift). */
1065 #ifdef CONFIG_BLK_DEV_IO_TRACE
1066 unsigned int btrace_seq;
1069 unsigned int policy;
1070 cpumask_t cpus_allowed;
1072 #ifdef CONFIG_PREEMPT_RCU
1073 int rcu_read_lock_nesting;
1074 int rcu_flipctr_idx;
1075 #endif /* #ifdef CONFIG_PREEMPT_RCU */
1077 #if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
1078 struct sched_info sched_info;
1081 struct list_head tasks;
1083 struct mm_struct *mm, *active_mm;
1086 struct linux_binfmt *binfmt;
1088 int exit_code, exit_signal;
1089 int pdeath_signal; /* The signal sent when the parent dies */
1091 unsigned int personality;
1092 unsigned did_exec:1;
1096 #ifdef CONFIG_CC_STACKPROTECTOR
1097 /* Canary value for the -fstack-protector gcc feature */
1098 unsigned long stack_canary;
1101 * pointers to (original) parent process, youngest child, younger sibling,
1102 * older sibling, respectively. (p->father can be replaced with
1103 * p->real_parent->pid)
1105 struct task_struct *real_parent; /* real parent process */
1106 struct task_struct *parent; /* recipient of SIGCHLD, wait4() reports */
1108 * children/sibling forms the list of my natural children
1110 struct list_head children; /* list of my children */
1111 struct list_head sibling; /* linkage in my parent's children list */
1112 struct task_struct *group_leader; /* threadgroup leader */
1115 * ptraced is the list of tasks this task is using ptrace on.
1116 * This includes both natural children and PTRACE_ATTACH targets.
1117 * p->ptrace_entry is p's link on the p->parent->ptraced list.
1119 struct list_head ptraced;
1120 struct list_head ptrace_entry;
1122 /* PID/PID hash table linkage. */
1123 struct pid_link pids[PIDTYPE_MAX];
1124 struct list_head thread_group;
1126 struct completion *vfork_done; /* for vfork() */
1127 int __user *set_child_tid; /* CLONE_CHILD_SETTID */
1128 int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */
1130 cputime_t utime, stime, utimescaled, stimescaled;
1132 cputime_t prev_utime, prev_stime;
1133 unsigned long nvcsw, nivcsw; /* context switch counts */
1134 struct timespec start_time; /* monotonic time */
1135 struct timespec real_start_time; /* boot based time */
1136 /* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */
1137 unsigned long min_flt, maj_flt;
1139 cputime_t it_prof_expires, it_virt_expires;
1140 unsigned long long it_sched_expires;
1141 struct list_head cpu_timers[3];
1143 /* process credentials */
1144 uid_t uid,euid,suid,fsuid;
1145 gid_t gid,egid,sgid,fsgid;
1146 struct group_info *group_info;
1147 kernel_cap_t cap_effective, cap_inheritable, cap_permitted, cap_bset;
1148 struct user_struct *user;
1149 unsigned securebits;
1151 unsigned char jit_keyring; /* default keyring to attach requested keys to */
1152 struct key *request_key_auth; /* assumed request_key authority */
1153 struct key *thread_keyring; /* keyring private to this thread */
1155 char comm[TASK_COMM_LEN]; /* executable name excluding path
1156 - access with [gs]et_task_comm (which lock
1157 it with task_lock())
1158 - initialized normally by flush_old_exec */
1159 /* file system info */
1160 int link_count, total_link_count;
1161 #ifdef CONFIG_SYSVIPC
1163 struct sysv_sem sysvsem;
1165 #ifdef CONFIG_DETECT_SOFTLOCKUP
1166 /* hung task detection */
1167 unsigned long last_switch_timestamp;
1168 unsigned long last_switch_count;
1170 /* CPU-specific state of this task */
1171 struct thread_struct thread;
1172 /* filesystem information */
1173 struct fs_struct *fs;
1174 /* open file information */
1175 struct files_struct *files;
1177 struct nsproxy *nsproxy;
1178 /* signal handlers */
1179 struct signal_struct *signal;
1180 struct sighand_struct *sighand;
1182 sigset_t blocked, real_blocked;
1183 sigset_t saved_sigmask; /* restored if set_restore_sigmask() was used */
1184 struct sigpending pending;
1186 unsigned long sas_ss_sp;
1188 int (*notifier)(void *priv);
1189 void *notifier_data;
1190 sigset_t *notifier_mask;
1191 #ifdef CONFIG_SECURITY
1194 struct audit_context *audit_context;
1195 #ifdef CONFIG_AUDITSYSCALL
1197 unsigned int sessionid;
1201 /* Thread group tracking */
1204 /* Protection of (de-)allocation: mm, files, fs, tty, keyrings */
1205 spinlock_t alloc_lock;
1207 /* Protection of the PI data structures: */
1210 #ifdef CONFIG_RT_MUTEXES
1211 /* PI waiters blocked on a rt_mutex held by this task */
1212 struct plist_head pi_waiters;
1213 /* Deadlock detection and priority inheritance handling */
1214 struct rt_mutex_waiter *pi_blocked_on;
1217 #ifdef CONFIG_DEBUG_MUTEXES
1218 /* mutex deadlock detection */
1219 struct mutex_waiter *blocked_on;
1221 #ifdef CONFIG_TRACE_IRQFLAGS
1222 unsigned int irq_events;
1223 int hardirqs_enabled;
1224 unsigned long hardirq_enable_ip;
1225 unsigned int hardirq_enable_event;
1226 unsigned long hardirq_disable_ip;
1227 unsigned int hardirq_disable_event;
1228 int softirqs_enabled;
1229 unsigned long softirq_disable_ip;
1230 unsigned int softirq_disable_event;
1231 unsigned long softirq_enable_ip;
1232 unsigned int softirq_enable_event;
1233 int hardirq_context;
1234 int softirq_context;
1236 #ifdef CONFIG_LOCKDEP
1237 # define MAX_LOCK_DEPTH 48UL
1240 unsigned int lockdep_recursion;
1241 struct held_lock held_locks[MAX_LOCK_DEPTH];
1244 /* journalling filesystem info */
1247 /* stacked block device info */
1248 struct bio *bio_list, **bio_tail;
1251 struct reclaim_state *reclaim_state;
1253 struct backing_dev_info *backing_dev_info;
1255 struct io_context *io_context;
1257 unsigned long ptrace_message;
1258 siginfo_t *last_siginfo; /* For ptrace use. */
1259 #ifdef CONFIG_TASK_XACCT
1260 /* i/o counters(bytes read/written, #syscalls */
1261 u64 rchar, wchar, syscr, syscw;
1263 struct task_io_accounting ioac;
1264 #if defined(CONFIG_TASK_XACCT)
1265 u64 acct_rss_mem1; /* accumulated rss usage */
1266 u64 acct_vm_mem1; /* accumulated virtual memory usage */
1267 cputime_t acct_timexpd; /* stime + utime since last update */
1269 #ifdef CONFIG_CPUSETS
1270 nodemask_t mems_allowed;
1271 int cpuset_mems_generation;
1272 int cpuset_mem_spread_rotor;
1274 #ifdef CONFIG_CGROUPS
1275 /* Control Group info protected by css_set_lock */
1276 struct css_set *cgroups;
1277 /* cg_list protected by css_set_lock and tsk->alloc_lock */
1278 struct list_head cg_list;
1281 struct robust_list_head __user *robust_list;
1282 #ifdef CONFIG_COMPAT
1283 struct compat_robust_list_head __user *compat_robust_list;
1285 struct list_head pi_state_list;
1286 struct futex_pi_state *pi_state_cache;
1289 struct mempolicy *mempolicy;
1292 atomic_t fs_excl; /* holding fs exclusive resources */
1293 struct rcu_head rcu;
1296 * cache last used pipe for splice
1298 struct pipe_inode_info *splice_pipe;
1299 #ifdef CONFIG_TASK_DELAY_ACCT
1300 struct task_delay_info *delays;
1302 #ifdef CONFIG_FAULT_INJECTION
1305 struct prop_local_single dirties;
1306 #ifdef CONFIG_LATENCYTOP
1307 int latency_record_count;
1308 struct latency_record latency_record[LT_SAVECOUNT];
1313 * Priority of a process goes from 0..MAX_PRIO-1, valid RT
1314 * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
1315 * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority
1316 * values are inverted: lower p->prio value means higher priority.
1318 * The MAX_USER_RT_PRIO value allows the actual maximum
1319 * RT priority to be separate from the value exported to
1320 * user-space. This allows kernel threads to set their
1321 * priority to a value higher than any user task. Note:
1322 * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.
1325 #define MAX_USER_RT_PRIO 100
1326 #define MAX_RT_PRIO MAX_USER_RT_PRIO
1328 #define MAX_PRIO (MAX_RT_PRIO + 40)
1329 #define DEFAULT_PRIO (MAX_RT_PRIO + 20)
1331 static inline int rt_prio(int prio)
1333 if (unlikely(prio < MAX_RT_PRIO))
1338 static inline int rt_task(struct task_struct *p)
1340 return rt_prio(p->prio);
1343 static inline void set_task_session(struct task_struct *tsk, pid_t session)
1345 tsk->signal->__session = session;
1348 static inline void set_task_pgrp(struct task_struct *tsk, pid_t pgrp)
1350 tsk->signal->__pgrp = pgrp;
1353 static inline struct pid *task_pid(struct task_struct *task)
1355 return task->pids[PIDTYPE_PID].pid;
1358 static inline struct pid *task_tgid(struct task_struct *task)
1360 return task->group_leader->pids[PIDTYPE_PID].pid;
1363 static inline struct pid *task_pgrp(struct task_struct *task)
1365 return task->group_leader->pids[PIDTYPE_PGID].pid;
1368 static inline struct pid *task_session(struct task_struct *task)
1370 return task->group_leader->pids[PIDTYPE_SID].pid;
1373 struct pid_namespace;
1376 * the helpers to get the task's different pids as they are seen
1377 * from various namespaces
1379 * task_xid_nr() : global id, i.e. the id seen from the init namespace;
1380 * task_xid_vnr() : virtual id, i.e. the id seen from the pid namespace of
1382 * task_xid_nr_ns() : id seen from the ns specified;
1384 * set_task_vxid() : assigns a virtual id to a task;
1386 * see also pid_nr() etc in include/linux/pid.h
1389 static inline pid_t task_pid_nr(struct task_struct *tsk)
1394 pid_t task_pid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
1396 static inline pid_t task_pid_vnr(struct task_struct *tsk)
1398 return pid_vnr(task_pid(tsk));
1402 static inline pid_t task_tgid_nr(struct task_struct *tsk)
1407 pid_t task_tgid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
1409 static inline pid_t task_tgid_vnr(struct task_struct *tsk)
1411 return pid_vnr(task_tgid(tsk));
1415 static inline pid_t task_pgrp_nr(struct task_struct *tsk)
1417 return tsk->signal->__pgrp;
1420 pid_t task_pgrp_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
1422 static inline pid_t task_pgrp_vnr(struct task_struct *tsk)
1424 return pid_vnr(task_pgrp(tsk));
1428 static inline pid_t task_session_nr(struct task_struct *tsk)
1430 return tsk->signal->__session;
1433 pid_t task_session_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
1435 static inline pid_t task_session_vnr(struct task_struct *tsk)
1437 return pid_vnr(task_session(tsk));
1442 * pid_alive - check that a task structure is not stale
1443 * @p: Task structure to be checked.
1445 * Test if a process is not yet dead (at most zombie state)
1446 * If pid_alive fails, then pointers within the task structure
1447 * can be stale and must not be dereferenced.
1449 static inline int pid_alive(struct task_struct *p)
1451 return p->pids[PIDTYPE_PID].pid != NULL;
1455 * is_global_init - check if a task structure is init
1456 * @tsk: Task structure to be checked.
1458 * Check if a task structure is the first user space task the kernel created.
1460 static inline int is_global_init(struct task_struct *tsk)
1462 return tsk->pid == 1;
1466 * is_container_init:
1467 * check whether in the task is init in its own pid namespace.
1469 extern int is_container_init(struct task_struct *tsk);
1471 extern struct pid *cad_pid;
1473 extern void free_task(struct task_struct *tsk);
1474 #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
1476 extern void __put_task_struct(struct task_struct *t);
1478 static inline void put_task_struct(struct task_struct *t)
1480 if (atomic_dec_and_test(&t->usage))
1481 __put_task_struct(t);
1487 #define PF_ALIGNWARN 0x00000001 /* Print alignment warning msgs */
1488 /* Not implemented yet, only for 486*/
1489 #define PF_STARTING 0x00000002 /* being created */
1490 #define PF_EXITING 0x00000004 /* getting shut down */
1491 #define PF_EXITPIDONE 0x00000008 /* pi exit done on shut down */
1492 #define PF_VCPU 0x00000010 /* I'm a virtual CPU */
1493 #define PF_FORKNOEXEC 0x00000040 /* forked but didn't exec */
1494 #define PF_SUPERPRIV 0x00000100 /* used super-user privileges */
1495 #define PF_DUMPCORE 0x00000200 /* dumped core */
1496 #define PF_SIGNALED 0x00000400 /* killed by a signal */
1497 #define PF_MEMALLOC 0x00000800 /* Allocating memory */
1498 #define PF_FLUSHER 0x00001000 /* responsible for disk writeback */
1499 #define PF_USED_MATH 0x00002000 /* if unset the fpu must be initialized before use */
1500 #define PF_NOFREEZE 0x00008000 /* this thread should not be frozen */
1501 #define PF_FROZEN 0x00010000 /* frozen for system suspend */
1502 #define PF_FSTRANS 0x00020000 /* inside a filesystem transaction */
1503 #define PF_KSWAPD 0x00040000 /* I am kswapd */
1504 #define PF_SWAPOFF 0x00080000 /* I am in swapoff */
1505 #define PF_LESS_THROTTLE 0x00100000 /* Throttle me less: I clean memory */
1506 #define PF_KTHREAD 0x00200000 /* I am a kernel thread */
1507 #define PF_RANDOMIZE 0x00400000 /* randomize virtual address space */
1508 #define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */
1509 #define PF_SPREAD_PAGE 0x01000000 /* Spread page cache over cpuset */
1510 #define PF_SPREAD_SLAB 0x02000000 /* Spread some slab caches over cpuset */
1511 #define PF_THREAD_BOUND 0x04000000 /* Thread bound to specific cpu */
1512 #define PF_MEMPOLICY 0x10000000 /* Non-default NUMA mempolicy */
1513 #define PF_MUTEX_TESTER 0x20000000 /* Thread belongs to the rt mutex tester */
1514 #define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezeable */
1515 #define PF_FREEZER_NOSIG 0x80000000 /* Freezer won't send signals to it */
1518 * Only the _current_ task can read/write to tsk->flags, but other
1519 * tasks can access tsk->flags in readonly mode for example
1520 * with tsk_used_math (like during threaded core dumping).
1521 * There is however an exception to this rule during ptrace
1522 * or during fork: the ptracer task is allowed to write to the
1523 * child->flags of its traced child (same goes for fork, the parent
1524 * can write to the child->flags), because we're guaranteed the
1525 * child is not running and in turn not changing child->flags
1526 * at the same time the parent does it.
1528 #define clear_stopped_child_used_math(child) do { (child)->flags &= ~PF_USED_MATH; } while (0)
1529 #define set_stopped_child_used_math(child) do { (child)->flags |= PF_USED_MATH; } while (0)
1530 #define clear_used_math() clear_stopped_child_used_math(current)
1531 #define set_used_math() set_stopped_child_used_math(current)
1532 #define conditional_stopped_child_used_math(condition, child) \
1533 do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= (condition) ? PF_USED_MATH : 0; } while (0)
1534 #define conditional_used_math(condition) \
1535 conditional_stopped_child_used_math(condition, current)
1536 #define copy_to_stopped_child_used_math(child) \
1537 do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= current->flags & PF_USED_MATH; } while (0)
1538 /* NOTE: this will return 0 or PF_USED_MATH, it will never return 1 */
1539 #define tsk_used_math(p) ((p)->flags & PF_USED_MATH)
1540 #define used_math() tsk_used_math(current)
1543 extern int set_cpus_allowed_ptr(struct task_struct *p,
1544 const cpumask_t *new_mask);
1546 static inline int set_cpus_allowed_ptr(struct task_struct *p,
1547 const cpumask_t *new_mask)
1549 if (!cpu_isset(0, *new_mask))
1554 static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
1556 return set_cpus_allowed_ptr(p, &new_mask);
1559 extern unsigned long long sched_clock(void);
1561 #ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
1562 static inline void sched_clock_init(void)
1566 static inline u64 sched_clock_cpu(int cpu)
1568 return sched_clock();
1571 static inline void sched_clock_tick(void)
1575 static inline void sched_clock_idle_sleep_event(void)
1579 static inline void sched_clock_idle_wakeup_event(u64 delta_ns)
1584 static inline void sched_clock_tick_stop(int cpu)
1588 static inline void sched_clock_tick_start(int cpu)
1593 #else /* CONFIG_HAVE_UNSTABLE_SCHED_CLOCK */
1594 extern void sched_clock_init(void);
1595 extern u64 sched_clock_cpu(int cpu);
1596 extern void sched_clock_tick(void);
1597 extern void sched_clock_idle_sleep_event(void);
1598 extern void sched_clock_idle_wakeup_event(u64 delta_ns);
1600 extern void sched_clock_tick_stop(int cpu);
1601 extern void sched_clock_tick_start(int cpu);
1603 #endif /* CONFIG_HAVE_UNSTABLE_SCHED_CLOCK */
1606 * For kernel-internal use: high-speed (but slightly incorrect) per-cpu
1607 * clock constructed from sched_clock():
1609 extern unsigned long long cpu_clock(int cpu);
1611 extern unsigned long long
1612 task_sched_runtime(struct task_struct *task);
1614 /* sched_exec is called by processes performing an exec */
1616 extern void sched_exec(void);
1618 #define sched_exec() {}
1621 extern void sched_clock_idle_sleep_event(void);
1622 extern void sched_clock_idle_wakeup_event(u64 delta_ns);
1624 #ifdef CONFIG_HOTPLUG_CPU
1625 extern void idle_task_exit(void);
1627 static inline void idle_task_exit(void) {}
1630 extern void sched_idle_next(void);
1632 #if defined(CONFIG_NO_HZ) && defined(CONFIG_SMP)
1633 extern void wake_up_idle_cpu(int cpu);
1635 static inline void wake_up_idle_cpu(int cpu) { }
1638 #ifdef CONFIG_SCHED_DEBUG
1639 extern unsigned int sysctl_sched_latency;
1640 extern unsigned int sysctl_sched_min_granularity;
1641 extern unsigned int sysctl_sched_wakeup_granularity;
1642 extern unsigned int sysctl_sched_child_runs_first;
1643 extern unsigned int sysctl_sched_features;
1644 extern unsigned int sysctl_sched_migration_cost;
1645 extern unsigned int sysctl_sched_nr_migrate;
1646 extern unsigned int sysctl_sched_shares_ratelimit;
1648 int sched_nr_latency_handler(struct ctl_table *table, int write,
1649 struct file *file, void __user *buffer, size_t *length,
1652 extern unsigned int sysctl_sched_rt_period;
1653 extern int sysctl_sched_rt_runtime;
1655 int sched_rt_handler(struct ctl_table *table, int write,
1656 struct file *filp, void __user *buffer, size_t *lenp,
1659 extern unsigned int sysctl_sched_compat_yield;
1661 #ifdef CONFIG_RT_MUTEXES
1662 extern int rt_mutex_getprio(struct task_struct *p);
1663 extern void rt_mutex_setprio(struct task_struct *p, int prio);
1664 extern void rt_mutex_adjust_pi(struct task_struct *p);
1666 static inline int rt_mutex_getprio(struct task_struct *p)
1668 return p->normal_prio;
1670 # define rt_mutex_adjust_pi(p) do { } while (0)
1673 extern void set_user_nice(struct task_struct *p, long nice);
1674 extern int task_prio(const struct task_struct *p);
1675 extern int task_nice(const struct task_struct *p);
1676 extern int can_nice(const struct task_struct *p, const int nice);
1677 extern int task_curr(const struct task_struct *p);
1678 extern int idle_cpu(int cpu);
1679 extern int sched_setscheduler(struct task_struct *, int, struct sched_param *);
1680 extern int sched_setscheduler_nocheck(struct task_struct *, int,
1681 struct sched_param *);
1682 extern struct task_struct *idle_task(int cpu);
1683 extern struct task_struct *curr_task(int cpu);
1684 extern void set_curr_task(int cpu, struct task_struct *p);
1689 * The default (Linux) execution domain.
1691 extern struct exec_domain default_exec_domain;
1693 union thread_union {
1694 struct thread_info thread_info;
1695 unsigned long stack[THREAD_SIZE/sizeof(long)];
1698 #ifndef __HAVE_ARCH_KSTACK_END
1699 static inline int kstack_end(void *addr)
1701 /* Reliable end of stack detection:
1702 * Some APM bios versions misalign the stack
1704 return !(((unsigned long)addr+sizeof(void*)-1) & (THREAD_SIZE-sizeof(void*)));
1708 extern union thread_union init_thread_union;
1709 extern struct task_struct init_task;
1711 extern struct mm_struct init_mm;
1713 extern struct pid_namespace init_pid_ns;
1716 * find a task by one of its numerical ids
1718 * find_task_by_pid_type_ns():
1719 * it is the most generic call - it finds a task by all id,
1720 * type and namespace specified
1721 * find_task_by_pid_ns():
1722 * finds a task by its pid in the specified namespace
1723 * find_task_by_vpid():
1724 * finds a task by its virtual pid
1726 * see also find_vpid() etc in include/linux/pid.h
1729 extern struct task_struct *find_task_by_pid_type_ns(int type, int pid,
1730 struct pid_namespace *ns);
1732 extern struct task_struct *find_task_by_vpid(pid_t nr);
1733 extern struct task_struct *find_task_by_pid_ns(pid_t nr,
1734 struct pid_namespace *ns);
1736 extern void __set_special_pids(struct pid *pid);
1738 /* per-UID process charging. */
1739 extern struct user_struct * alloc_uid(struct user_namespace *, uid_t);
1740 static inline struct user_struct *get_uid(struct user_struct *u)
1742 atomic_inc(&u->__count);
1745 extern void free_uid(struct user_struct *);
1746 extern void switch_uid(struct user_struct *);
1747 extern void release_uids(struct user_namespace *ns);
1749 #include <asm/current.h>
1751 extern void do_timer(unsigned long ticks);
1753 extern int wake_up_state(struct task_struct *tsk, unsigned int state);
1754 extern int wake_up_process(struct task_struct *tsk);
1755 extern void wake_up_new_task(struct task_struct *tsk,
1756 unsigned long clone_flags);
1758 extern void kick_process(struct task_struct *tsk);
1760 static inline void kick_process(struct task_struct *tsk) { }
1762 extern void sched_fork(struct task_struct *p, int clone_flags);
1763 extern void sched_dead(struct task_struct *p);
1765 extern int in_group_p(gid_t);
1766 extern int in_egroup_p(gid_t);
1768 extern void proc_caches_init(void);
1769 extern void flush_signals(struct task_struct *);
1770 extern void ignore_signals(struct task_struct *);
1771 extern void flush_signal_handlers(struct task_struct *, int force_default);
1772 extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);
1774 static inline int dequeue_signal_lock(struct task_struct *tsk, sigset_t *mask, siginfo_t *info)
1776 unsigned long flags;
1779 spin_lock_irqsave(&tsk->sighand->siglock, flags);
1780 ret = dequeue_signal(tsk, mask, info);
1781 spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
1786 extern void block_all_signals(int (*notifier)(void *priv), void *priv,
1788 extern void unblock_all_signals(void);
1789 extern void release_task(struct task_struct * p);
1790 extern int send_sig_info(int, struct siginfo *, struct task_struct *);
1791 extern int force_sigsegv(int, struct task_struct *);
1792 extern int force_sig_info(int, struct siginfo *, struct task_struct *);
1793 extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);
1794 extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid);
1795 extern int kill_pid_info_as_uid(int, struct siginfo *, struct pid *, uid_t, uid_t, u32);
1796 extern int kill_pgrp(struct pid *pid, int sig, int priv);
1797 extern int kill_pid(struct pid *pid, int sig, int priv);
1798 extern int kill_proc_info(int, struct siginfo *, pid_t);
1799 extern int do_notify_parent(struct task_struct *, int);
1800 extern void force_sig(int, struct task_struct *);
1801 extern void force_sig_specific(int, struct task_struct *);
1802 extern int send_sig(int, struct task_struct *, int);
1803 extern void zap_other_threads(struct task_struct *p);
1804 extern struct sigqueue *sigqueue_alloc(void);
1805 extern void sigqueue_free(struct sigqueue *);
1806 extern int send_sigqueue(struct sigqueue *, struct task_struct *, int group);
1807 extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
1808 extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long);
1810 static inline int kill_cad_pid(int sig, int priv)
1812 return kill_pid(cad_pid, sig, priv);
1815 /* These can be the second arg to send_sig_info/send_group_sig_info. */
1816 #define SEND_SIG_NOINFO ((struct siginfo *) 0)
1817 #define SEND_SIG_PRIV ((struct siginfo *) 1)
1818 #define SEND_SIG_FORCED ((struct siginfo *) 2)
1820 static inline int is_si_special(const struct siginfo *info)
1822 return info <= SEND_SIG_FORCED;
1825 /* True if we are on the alternate signal stack. */
1827 static inline int on_sig_stack(unsigned long sp)
1829 return (sp - current->sas_ss_sp < current->sas_ss_size);
1832 static inline int sas_ss_flags(unsigned long sp)
1834 return (current->sas_ss_size == 0 ? SS_DISABLE
1835 : on_sig_stack(sp) ? SS_ONSTACK : 0);
1839 * Routines for handling mm_structs
1841 extern struct mm_struct * mm_alloc(void);
1843 /* mmdrop drops the mm and the page tables */
1844 extern void __mmdrop(struct mm_struct *);
1845 static inline void mmdrop(struct mm_struct * mm)
1847 if (unlikely(atomic_dec_and_test(&mm->mm_count)))
1851 /* mmput gets rid of the mappings and all user-space */
1852 extern void mmput(struct mm_struct *);
1853 /* Grab a reference to a task's mm, if it is not already going away */
1854 extern struct mm_struct *get_task_mm(struct task_struct *task);
1855 /* Remove the current tasks stale references to the old mm_struct */
1856 extern void mm_release(struct task_struct *, struct mm_struct *);
1857 /* Allocate a new mm structure and copy contents from tsk->mm */
1858 extern struct mm_struct *dup_mm(struct task_struct *tsk);
1860 extern int copy_thread(int, unsigned long, unsigned long, unsigned long, struct task_struct *, struct pt_regs *);
1861 extern void flush_thread(void);
1862 extern void exit_thread(void);
1864 extern void exit_files(struct task_struct *);
1865 extern void __cleanup_signal(struct signal_struct *);
1866 extern void __cleanup_sighand(struct sighand_struct *);
1868 extern void exit_itimers(struct signal_struct *);
1869 extern void flush_itimer_signals(void);
1871 extern NORET_TYPE void do_group_exit(int);
1873 extern void daemonize(const char *, ...);
1874 extern int allow_signal(int);
1875 extern int disallow_signal(int);
1877 extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *);
1878 extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);
1879 struct task_struct *fork_idle(int);
1881 extern void set_task_comm(struct task_struct *tsk, char *from);
1882 extern char *get_task_comm(char *to, struct task_struct *tsk);
1885 extern unsigned long wait_task_inactive(struct task_struct *, long match_state);
1887 static inline unsigned long wait_task_inactive(struct task_struct *p,
1894 #define next_task(p) list_entry(rcu_dereference((p)->tasks.next), struct task_struct, tasks)
1896 #define for_each_process(p) \
1897 for (p = &init_task ; (p = next_task(p)) != &init_task ; )
1900 * Careful: do_each_thread/while_each_thread is a double loop so
1901 * 'break' will not work as expected - use goto instead.
1903 #define do_each_thread(g, t) \
1904 for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do
1906 #define while_each_thread(g, t) \
1907 while ((t = next_thread(t)) != g)
1909 /* de_thread depends on thread_group_leader not being a pid based check */
1910 #define thread_group_leader(p) (p == p->group_leader)
1912 /* Do to the insanities of de_thread it is possible for a process
1913 * to have the pid of the thread group leader without actually being
1914 * the thread group leader. For iteration through the pids in proc
1915 * all we care about is that we have a task with the appropriate
1916 * pid, we don't actually care if we have the right task.
1918 static inline int has_group_leader_pid(struct task_struct *p)
1920 return p->pid == p->tgid;
1924 int same_thread_group(struct task_struct *p1, struct task_struct *p2)
1926 return p1->tgid == p2->tgid;
1929 static inline struct task_struct *next_thread(const struct task_struct *p)
1931 return list_entry(rcu_dereference(p->thread_group.next),
1932 struct task_struct, thread_group);
1935 static inline int thread_group_empty(struct task_struct *p)
1937 return list_empty(&p->thread_group);
1940 #define delay_group_leader(p) \
1941 (thread_group_leader(p) && !thread_group_empty(p))
1944 * Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring
1945 * subscriptions and synchronises with wait4(). Also used in procfs. Also
1946 * pins the final release of task.io_context. Also protects ->cpuset and
1947 * ->cgroup.subsys[].
1949 * Nests both inside and outside of read_lock(&tasklist_lock).
1950 * It must not be nested with write_lock_irq(&tasklist_lock),
1951 * neither inside nor outside.
1953 static inline void task_lock(struct task_struct *p)
1955 spin_lock(&p->alloc_lock);
1958 static inline void task_unlock(struct task_struct *p)
1960 spin_unlock(&p->alloc_lock);
1963 extern struct sighand_struct *lock_task_sighand(struct task_struct *tsk,
1964 unsigned long *flags);
1966 static inline void unlock_task_sighand(struct task_struct *tsk,
1967 unsigned long *flags)
1969 spin_unlock_irqrestore(&tsk->sighand->siglock, *flags);
1972 #ifndef __HAVE_THREAD_FUNCTIONS
1974 #define task_thread_info(task) ((struct thread_info *)(task)->stack)
1975 #define task_stack_page(task) ((task)->stack)
1977 static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org)
1979 *task_thread_info(p) = *task_thread_info(org);
1980 task_thread_info(p)->task = p;
1983 static inline unsigned long *end_of_stack(struct task_struct *p)
1985 return (unsigned long *)(task_thread_info(p) + 1);
1990 static inline int object_is_on_stack(void *obj)
1992 void *stack = task_stack_page(current);
1994 return (obj >= stack) && (obj < (stack + THREAD_SIZE));
1997 extern void thread_info_cache_init(void);
1999 /* set thread flags in other task's structures
2000 * - see asm/thread_info.h for TIF_xxxx flags available
2002 static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag)
2004 set_ti_thread_flag(task_thread_info(tsk), flag);
2007 static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag)
2009 clear_ti_thread_flag(task_thread_info(tsk), flag);
2012 static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag)
2014 return test_and_set_ti_thread_flag(task_thread_info(tsk), flag);
2017 static inline int test_and_clear_tsk_thread_flag(struct task_struct *tsk, int flag)
2019 return test_and_clear_ti_thread_flag(task_thread_info(tsk), flag);
2022 static inline int test_tsk_thread_flag(struct task_struct *tsk, int flag)
2024 return test_ti_thread_flag(task_thread_info(tsk), flag);
2027 static inline void set_tsk_need_resched(struct task_struct *tsk)
2029 set_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
2032 static inline void clear_tsk_need_resched(struct task_struct *tsk)
2034 clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
2037 static inline int test_tsk_need_resched(struct task_struct *tsk)
2039 return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED));
2042 static inline int signal_pending(struct task_struct *p)
2044 return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));
2047 extern int __fatal_signal_pending(struct task_struct *p);
2049 static inline int fatal_signal_pending(struct task_struct *p)
2051 return signal_pending(p) && __fatal_signal_pending(p);
2054 static inline int signal_pending_state(long state, struct task_struct *p)
2056 if (!(state & (TASK_INTERRUPTIBLE | TASK_WAKEKILL)))
2058 if (!signal_pending(p))
2061 return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p);
2064 static inline int need_resched(void)
2066 return unlikely(test_thread_flag(TIF_NEED_RESCHED));
2070 * cond_resched() and cond_resched_lock(): latency reduction via
2071 * explicit rescheduling in places that are safe. The return
2072 * value indicates whether a reschedule was done in fact.
2073 * cond_resched_lock() will drop the spinlock before scheduling,
2074 * cond_resched_softirq() will enable bhs before scheduling.
2076 extern int _cond_resched(void);
2077 #ifdef CONFIG_PREEMPT_BKL
2078 static inline int cond_resched(void)
2083 static inline int cond_resched(void)
2085 return _cond_resched();
2088 extern int cond_resched_lock(spinlock_t * lock);
2089 extern int cond_resched_softirq(void);
2090 static inline int cond_resched_bkl(void)
2092 return _cond_resched();
2096 * Does a critical section need to be broken due to another
2097 * task waiting?: (technically does not depend on CONFIG_PREEMPT,
2098 * but a general need for low latency)
2100 static inline int spin_needbreak(spinlock_t *lock)
2102 #ifdef CONFIG_PREEMPT
2103 return spin_is_contended(lock);
2110 * Reevaluate whether the task has signals pending delivery.
2111 * Wake the task if so.
2112 * This is required every time the blocked sigset_t changes.
2113 * callers must hold sighand->siglock.
2115 extern void recalc_sigpending_and_wake(struct task_struct *t);
2116 extern void recalc_sigpending(void);
2118 extern void signal_wake_up(struct task_struct *t, int resume_stopped);
2121 * Wrappers for p->thread_info->cpu access. No-op on UP.
2125 static inline unsigned int task_cpu(const struct task_struct *p)
2127 return task_thread_info(p)->cpu;
2130 extern void set_task_cpu(struct task_struct *p, unsigned int cpu);
2134 static inline unsigned int task_cpu(const struct task_struct *p)
2139 static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
2143 #endif /* CONFIG_SMP */
2145 extern void arch_pick_mmap_layout(struct mm_struct *mm);
2147 #ifdef CONFIG_TRACING
2149 __trace_special(void *__tr, void *__data,
2150 unsigned long arg1, unsigned long arg2, unsigned long arg3);
2153 __trace_special(void *__tr, void *__data,
2154 unsigned long arg1, unsigned long arg2, unsigned long arg3)
2159 extern long sched_setaffinity(pid_t pid, const cpumask_t *new_mask);
2160 extern long sched_getaffinity(pid_t pid, cpumask_t *mask);
2162 extern int sched_mc_power_savings, sched_smt_power_savings;
2164 extern void normalize_rt_tasks(void);
2166 #ifdef CONFIG_GROUP_SCHED
2168 extern struct task_group init_task_group;
2169 #ifdef CONFIG_USER_SCHED
2170 extern struct task_group root_task_group;
2173 extern struct task_group *sched_create_group(struct task_group *parent);
2174 extern void sched_destroy_group(struct task_group *tg);
2175 extern void sched_move_task(struct task_struct *tsk);
2176 #ifdef CONFIG_FAIR_GROUP_SCHED
2177 extern int sched_group_set_shares(struct task_group *tg, unsigned long shares);
2178 extern unsigned long sched_group_shares(struct task_group *tg);
2180 #ifdef CONFIG_RT_GROUP_SCHED
2181 extern int sched_group_set_rt_runtime(struct task_group *tg,
2182 long rt_runtime_us);
2183 extern long sched_group_rt_runtime(struct task_group *tg);
2184 extern int sched_group_set_rt_period(struct task_group *tg,
2186 extern long sched_group_rt_period(struct task_group *tg);
2190 #ifdef CONFIG_TASK_XACCT
2191 static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
2196 static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
2201 static inline void inc_syscr(struct task_struct *tsk)
2206 static inline void inc_syscw(struct task_struct *tsk)
2211 static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
2215 static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
2219 static inline void inc_syscr(struct task_struct *tsk)
2223 static inline void inc_syscw(struct task_struct *tsk)
2228 #ifndef TASK_SIZE_OF
2229 #define TASK_SIZE_OF(tsk) TASK_SIZE
2232 #ifdef CONFIG_MM_OWNER
2233 extern void mm_update_next_owner(struct mm_struct *mm);
2234 extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p);
2236 static inline void mm_update_next_owner(struct mm_struct *mm)
2240 static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
2243 #endif /* CONFIG_MM_OWNER */
2245 #define TASK_STATE_TO_CHAR_STR "RSDTtZX"
2247 #endif /* __KERNEL__ */