1#ifndef _LINUX_SCHED_H
2#define _LINUX_SCHED_H
3
4
5
6
7#define CSIGNAL 0x000000ff
8#define CLONE_VM 0x00000100
9#define CLONE_FS 0x00000200
10#define CLONE_FILES 0x00000400
11#define CLONE_SIGHAND 0x00000800
12#define CLONE_PTRACE 0x00002000
13#define CLONE_VFORK 0x00004000
14#define CLONE_PARENT 0x00008000
15#define CLONE_THREAD 0x00010000
16#define CLONE_NEWNS 0x00020000
17#define CLONE_SYSVSEM 0x00040000
18#define CLONE_SETTLS 0x00080000
19#define CLONE_PARENT_SETTID 0x00100000
20#define CLONE_CHILD_CLEARTID 0x00200000
21#define CLONE_DETACHED 0x00400000
22#define CLONE_UNTRACED 0x00800000
23#define CLONE_CHILD_SETTID 0x01000000
24
25
26#define CLONE_NEWUTS 0x04000000
27#define CLONE_NEWIPC 0x08000000
28#define CLONE_NEWUSER 0x10000000
29#define CLONE_NEWPID 0x20000000
30#define CLONE_NEWNET 0x40000000
31#define CLONE_IO 0x80000000
32
33
34
35
36#define SCHED_NORMAL 0
37#define SCHED_FIFO 1
38#define SCHED_RR 2
39#define SCHED_BATCH 3
40
41#define SCHED_IDLE 5
42
43#define SCHED_RESET_ON_FORK 0x40000000
44
45#ifdef __KERNEL__
46
47struct sched_param {
48 int sched_priority;
49};
50
51#include <asm/param.h>
52
53#include <linux/capability.h>
54#include <linux/threads.h>
55#include <linux/kernel.h>
56#include <linux/types.h>
57#include <linux/timex.h>
58#include <linux/jiffies.h>
59#include <linux/rbtree.h>
60#include <linux/thread_info.h>
61#include <linux/cpumask.h>
62#include <linux/errno.h>
63#include <linux/nodemask.h>
64#include <linux/mm_types.h>
65
66#include <asm/system.h>
67#include <asm/page.h>
68#include <asm/ptrace.h>
69#include <asm/cputime.h>
70
71#include <linux/smp.h>
72#include <linux/sem.h>
73#include <linux/signal.h>
74#include <linux/compiler.h>
75#include <linux/completion.h>
76#include <linux/pid.h>
77#include <linux/percpu.h>
78#include <linux/topology.h>
79#include <linux/proportions.h>
80#include <linux/seccomp.h>
81#include <linux/rcupdate.h>
82#include <linux/rculist.h>
83#include <linux/rtmutex.h>
84
85#include <linux/time.h>
86#include <linux/param.h>
87#include <linux/resource.h>
88#include <linux/timer.h>
89#include <linux/hrtimer.h>
90#include <linux/task_io_accounting.h>
91#include <linux/latencytop.h>
92#include <linux/cred.h>
93
94#include <asm/processor.h>
95
96struct exec_domain;
97struct futex_pi_state;
98struct robust_list_head;
99struct bio_list;
100struct fs_struct;
101struct perf_event_context;
102struct blk_plug;
103
104
105
106
107
108#define CLONE_KERNEL (CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
109
110
111
112
113
114
115
116
117
118
119
120extern unsigned long avenrun[];
121extern void get_avenrun(unsigned long *loads, unsigned long offset, int shift);
122
123#define FSHIFT 11
124#define FIXED_1 (1<<FSHIFT)
125#define LOAD_FREQ (5*HZ+1)
126#define EXP_1 1884
127#define EXP_5 2014
128#define EXP_15 2037
129
130#define CALC_LOAD(load,exp,n) \
131 load *= exp; \
132 load += n*(FIXED_1-exp); \
133 load >>= FSHIFT;
134
135extern unsigned long total_forks;
136extern int nr_threads;
137DECLARE_PER_CPU(unsigned long, process_counts);
138extern int nr_processes(void);
139extern unsigned long nr_running(void);
140extern unsigned long nr_uninterruptible(void);
141extern unsigned long nr_iowait(void);
142extern unsigned long nr_iowait_cpu(int cpu);
143extern unsigned long this_cpu_load(void);
144
145
146extern void calc_global_load(unsigned long ticks);
147
148extern unsigned long get_parent_ip(unsigned long addr);
149
150struct seq_file;
151struct cfs_rq;
152struct task_group;
153#ifdef CONFIG_SCHED_DEBUG
154extern void proc_sched_show_task(struct task_struct *p, struct seq_file *m);
155extern void proc_sched_set_task(struct task_struct *p);
156extern void
157print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq);
158#else
159static inline void
160proc_sched_show_task(struct task_struct *p, struct seq_file *m)
161{
162}
163static inline void proc_sched_set_task(struct task_struct *p)
164{
165}
166static inline void
167print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
168{
169}
170#endif
171
172
173
174
175
176
177
178
179
180
181
182#define TASK_RUNNING 0
183#define TASK_INTERRUPTIBLE 1
184#define TASK_UNINTERRUPTIBLE 2
185#define __TASK_STOPPED 4
186#define __TASK_TRACED 8
187
188#define EXIT_ZOMBIE 16
189#define EXIT_DEAD 32
190
191#define TASK_DEAD 64
192#define TASK_WAKEKILL 128
193#define TASK_WAKING 256
194#define TASK_STATE_MAX 512
195
196#define TASK_STATE_TO_CHAR_STR "RSDTtZXxKW"
197
198extern char ___assert_task_state[1 - 2*!!(
199 sizeof(TASK_STATE_TO_CHAR_STR)-1 != ilog2(TASK_STATE_MAX)+1)];
200
201
202#define TASK_KILLABLE (TASK_WAKEKILL | TASK_UNINTERRUPTIBLE)
203#define TASK_STOPPED (TASK_WAKEKILL | __TASK_STOPPED)
204#define TASK_TRACED (TASK_WAKEKILL | __TASK_TRACED)
205
206
207#define TASK_NORMAL (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE)
208#define TASK_ALL (TASK_NORMAL | __TASK_STOPPED | __TASK_TRACED)
209
210
211#define TASK_REPORT (TASK_RUNNING | TASK_INTERRUPTIBLE | \
212 TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \
213 __TASK_TRACED)
214
215#define task_is_traced(task) ((task->state & __TASK_TRACED) != 0)
216#define task_is_stopped(task) ((task->state & __TASK_STOPPED) != 0)
217#define task_is_dead(task) ((task)->exit_state != 0)
218#define task_is_stopped_or_traced(task) \
219 ((task->state & (__TASK_STOPPED | __TASK_TRACED)) != 0)
220#define task_contributes_to_load(task) \
221 ((task->state & TASK_UNINTERRUPTIBLE) != 0 && \
222 (task->flags & PF_FREEZING) == 0)
223
224#define __set_task_state(tsk, state_value) \
225 do { (tsk)->state = (state_value); } while (0)
226#define set_task_state(tsk, state_value) \
227 set_mb((tsk)->state, (state_value))
228
229
230
231
232
233
234
235
236
237
238
239
240#define __set_current_state(state_value) \
241 do { current->state = (state_value); } while (0)
242#define set_current_state(state_value) \
243 set_mb(current->state, (state_value))
244
245
246#define TASK_COMM_LEN 16
247
248#include <linux/spinlock.h>
249
250
251
252
253
254
255
256extern rwlock_t tasklist_lock;
257extern spinlock_t mmlist_lock;
258
259struct task_struct;
260
261#ifdef CONFIG_PROVE_RCU
262extern int lockdep_tasklist_lock_is_held(void);
263#endif
264
265extern void sched_init(void);
266extern void sched_init_smp(void);
267extern asmlinkage void schedule_tail(struct task_struct *prev);
268extern void init_idle(struct task_struct *idle, int cpu);
269extern void init_idle_bootup_task(struct task_struct *idle);
270
271extern int runqueue_is_locked(int cpu);
272
273extern cpumask_var_t nohz_cpu_mask;
274#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)
275extern void select_nohz_load_balancer(int stop_tick);
276extern int get_nohz_timer_target(void);
277#else
278static inline void select_nohz_load_balancer(int stop_tick) { }
279#endif
280
281
282
283
284extern void show_state_filter(unsigned long state_filter);
285
286static inline void show_state(void)
287{
288 show_state_filter(0);
289}
290
291extern void show_regs(struct pt_regs *);
292
293
294
295
296
297
298extern void show_stack(struct task_struct *task, unsigned long *sp);
299
300void io_schedule(void);
301long io_schedule_timeout(long timeout);
302
303extern void cpu_init (void);
304extern void trap_init(void);
305extern void update_process_times(int user);
306extern void scheduler_tick(void);
307
308extern void sched_show_task(struct task_struct *p);
309
310#ifdef CONFIG_LOCKUP_DETECTOR
311extern void touch_softlockup_watchdog(void);
312extern void touch_softlockup_watchdog_sync(void);
313extern void touch_all_softlockup_watchdogs(void);
314extern int proc_dowatchdog_thresh(struct ctl_table *table, int write,
315 void __user *buffer,
316 size_t *lenp, loff_t *ppos);
317extern unsigned int softlockup_panic;
318void lockup_detector_init(void);
319#else
320static inline void touch_softlockup_watchdog(void)
321{
322}
323static inline void touch_softlockup_watchdog_sync(void)
324{
325}
326static inline void touch_all_softlockup_watchdogs(void)
327{
328}
329static inline void lockup_detector_init(void)
330{
331}
332#endif
333
334#ifdef CONFIG_DETECT_HUNG_TASK
335extern unsigned int sysctl_hung_task_panic;
336extern unsigned long sysctl_hung_task_check_count;
337extern unsigned long sysctl_hung_task_timeout_secs;
338extern unsigned long sysctl_hung_task_warnings;
339extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,
340 void __user *buffer,
341 size_t *lenp, loff_t *ppos);
342#else
343
344enum { sysctl_hung_task_timeout_secs = 0 };
345#endif
346
347
348#define __sched __attribute__((__section__(".sched.text")))
349
350
351extern char __sched_text_start[], __sched_text_end[];
352
353
354extern int in_sched_functions(unsigned long addr);
355
356#define MAX_SCHEDULE_TIMEOUT LONG_MAX
357extern signed long schedule_timeout(signed long timeout);
358extern signed long schedule_timeout_interruptible(signed long timeout);
359extern signed long schedule_timeout_killable(signed long timeout);
360extern signed long schedule_timeout_uninterruptible(signed long timeout);
361asmlinkage void schedule(void);
362extern int mutex_spin_on_owner(struct mutex *lock, struct task_struct *owner);
363
364struct nsproxy;
365struct user_namespace;
366
367
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374
375
376
377
378
379#define MAPCOUNT_ELF_CORE_MARGIN (5)
380#define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN)
381
382extern int sysctl_max_map_count;
383
384#include <linux/aio.h>
385
386#ifdef CONFIG_MMU
387extern void arch_pick_mmap_layout(struct mm_struct *mm);
388extern unsigned long
389arch_get_unmapped_area(struct file *, unsigned long, unsigned long,
390 unsigned long, unsigned long);
391extern unsigned long
392arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
393 unsigned long len, unsigned long pgoff,
394 unsigned long flags);
395extern void arch_unmap_area(struct mm_struct *, unsigned long);
396extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
397#else
398static inline void arch_pick_mmap_layout(struct mm_struct *mm) {}
399#endif
400
401
402extern void set_dumpable(struct mm_struct *mm, int value);
403extern int get_dumpable(struct mm_struct *mm);
404
405
406
407#define MMF_DUMPABLE 0
408#define MMF_DUMP_SECURELY 1
409
410#define MMF_DUMPABLE_BITS 2
411#define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1)
412
413
414#define MMF_DUMP_ANON_PRIVATE 2
415#define MMF_DUMP_ANON_SHARED 3
416#define MMF_DUMP_MAPPED_PRIVATE 4
417#define MMF_DUMP_MAPPED_SHARED 5
418#define MMF_DUMP_ELF_HEADERS 6
419#define MMF_DUMP_HUGETLB_PRIVATE 7
420#define MMF_DUMP_HUGETLB_SHARED 8
421
422#define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS
423#define MMF_DUMP_FILTER_BITS 7
424#define MMF_DUMP_FILTER_MASK \
425 (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
426#define MMF_DUMP_FILTER_DEFAULT \
427 ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\
428 (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF)
429
430#ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
431# define MMF_DUMP_MASK_DEFAULT_ELF (1 << MMF_DUMP_ELF_HEADERS)
432#else
433# define MMF_DUMP_MASK_DEFAULT_ELF 0
434#endif
435
436#define MMF_VM_MERGEABLE 16
437#define MMF_VM_HUGEPAGE 17
438
439#define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK)
440
441struct sighand_struct {
442 atomic_t count;
443 struct k_sigaction action[_NSIG];
444 spinlock_t siglock;
445 wait_queue_head_t signalfd_wqh;
446};
447
448struct pacct_struct {
449 int ac_flag;
450 long ac_exitcode;
451 unsigned long ac_mem;
452 cputime_t ac_utime, ac_stime;
453 unsigned long ac_minflt, ac_majflt;
454};
455
456struct cpu_itimer {
457 cputime_t expires;
458 cputime_t incr;
459 u32 error;
460 u32 incr_error;
461};
462
463
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468
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470
471
472
473
474struct task_cputime {
475 cputime_t utime;
476 cputime_t stime;
477 unsigned long long sum_exec_runtime;
478};
479
480#define prof_exp stime
481#define virt_exp utime
482#define sched_exp sum_exec_runtime
483
484#define INIT_CPUTIME \
485 (struct task_cputime) { \
486 .utime = cputime_zero, \
487 .stime = cputime_zero, \
488 .sum_exec_runtime = 0, \
489 }
490
491
492
493
494
495
496
497
498#define INIT_PREEMPT_COUNT (1 + PREEMPT_ACTIVE)
499
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508
509
510struct thread_group_cputimer {
511 struct task_cputime cputime;
512 int running;
513 spinlock_t lock;
514};
515
516#include <linux/rwsem.h>
517struct autogroup;
518
519
520
521
522
523
524
525
526struct signal_struct {
527 atomic_t sigcnt;
528 atomic_t live;
529 int nr_threads;
530
531 wait_queue_head_t wait_chldexit;
532
533
534 struct task_struct *curr_target;
535
536
537 struct sigpending shared_pending;
538
539
540 int group_exit_code;
541
542
543
544
545
546 int notify_count;
547 struct task_struct *group_exit_task;
548
549
550 int group_stop_count;
551 unsigned int flags;
552
553
554 struct list_head posix_timers;
555
556
557 struct hrtimer real_timer;
558 struct pid *leader_pid;
559 ktime_t it_real_incr;
560
561
562
563
564
565
566 struct cpu_itimer it[2];
567
568
569
570
571
572 struct thread_group_cputimer cputimer;
573
574
575 struct task_cputime cputime_expires;
576
577 struct list_head cpu_timers[3];
578
579 struct pid *tty_old_pgrp;
580
581
582 int leader;
583
584 struct tty_struct *tty;
585
586#ifdef CONFIG_SCHED_AUTOGROUP
587 struct autogroup *autogroup;
588#endif
589
590
591
592
593
594
595 cputime_t utime, stime, cutime, cstime;
596 cputime_t gtime;
597 cputime_t cgtime;
598#ifndef CONFIG_VIRT_CPU_ACCOUNTING
599 cputime_t prev_utime, prev_stime;
600#endif
601 unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
602 unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
603 unsigned long inblock, oublock, cinblock, coublock;
604 unsigned long maxrss, cmaxrss;
605 struct task_io_accounting ioac;
606
607
608
609
610
611
612
613 unsigned long long sum_sched_runtime;
614
615
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619
620
621
622
623
624 struct rlimit rlim[RLIM_NLIMITS];
625
626#ifdef CONFIG_BSD_PROCESS_ACCT
627 struct pacct_struct pacct;
628#endif
629#ifdef CONFIG_TASKSTATS
630 struct taskstats *stats;
631#endif
632#ifdef CONFIG_AUDIT
633 unsigned audit_tty;
634 struct tty_audit_buf *tty_audit_buf;
635#endif
636#ifdef CONFIG_CGROUPS
637
638
639
640
641
642
643
644 struct rw_semaphore threadgroup_fork_lock;
645#endif
646
647 int oom_adj;
648 int oom_score_adj;
649 int oom_score_adj_min;
650
651
652 struct mutex cred_guard_mutex;
653
654
655};
656
657
658#ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW
659# define __ARCH_WANT_UNLOCKED_CTXSW
660#endif
661
662
663
664
665#define SIGNAL_STOP_STOPPED 0x00000001
666#define SIGNAL_STOP_CONTINUED 0x00000002
667#define SIGNAL_GROUP_EXIT 0x00000004
668
669
670
671#define SIGNAL_CLD_STOPPED 0x00000010
672#define SIGNAL_CLD_CONTINUED 0x00000020
673#define SIGNAL_CLD_MASK (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED)
674
675#define SIGNAL_UNKILLABLE 0x00000040
676
677
678static inline int signal_group_exit(const struct signal_struct *sig)
679{
680 return (sig->flags & SIGNAL_GROUP_EXIT) ||
681 (sig->group_exit_task != NULL);
682}
683
684
685
686
687struct user_struct {
688 atomic_t __count;
689 atomic_t processes;
690 atomic_t files;
691 atomic_t sigpending;
692#ifdef CONFIG_INOTIFY_USER
693 atomic_t inotify_watches;
694 atomic_t inotify_devs;
695#endif
696#ifdef CONFIG_FANOTIFY
697 atomic_t fanotify_listeners;
698#endif
699#ifdef CONFIG_EPOLL
700 atomic_long_t epoll_watches;
701#endif
702#ifdef CONFIG_POSIX_MQUEUE
703
704 unsigned long mq_bytes;
705#endif
706 unsigned long locked_shm;
707
708#ifdef CONFIG_KEYS
709 struct key *uid_keyring;
710 struct key *session_keyring;
711#endif
712
713
714 struct hlist_node uidhash_node;
715 uid_t uid;
716 struct user_namespace *user_ns;
717
718#ifdef CONFIG_PERF_EVENTS
719 atomic_long_t locked_vm;
720#endif
721};
722
723extern int uids_sysfs_init(void);
724
725extern struct user_struct *find_user(uid_t);
726
727extern struct user_struct root_user;
728#define INIT_USER (&root_user)
729
730
731struct backing_dev_info;
732struct reclaim_state;
733
734#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
735struct sched_info {
736
737 unsigned long pcount;
738 unsigned long long run_delay;
739
740
741 unsigned long long last_arrival,
742 last_queued;
743};
744#endif
745
746#ifdef CONFIG_TASK_DELAY_ACCT
747struct task_delay_info {
748 spinlock_t lock;
749 unsigned int flags;
750
751
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764
765
766 struct timespec blkio_start, blkio_end;
767 u64 blkio_delay;
768 u64 swapin_delay;
769 u32 blkio_count;
770
771 u32 swapin_count;
772
773
774 struct timespec freepages_start, freepages_end;
775 u64 freepages_delay;
776 u32 freepages_count;
777};
778#endif
779
780static inline int sched_info_on(void)
781{
782#ifdef CONFIG_SCHEDSTATS
783 return 1;
784#elif defined(CONFIG_TASK_DELAY_ACCT)
785 extern int delayacct_on;
786 return delayacct_on;
787#else
788 return 0;
789#endif
790}
791
792enum cpu_idle_type {
793 CPU_IDLE,
794 CPU_NOT_IDLE,
795 CPU_NEWLY_IDLE,
796 CPU_MAX_IDLE_TYPES
797};
798
799
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810
811#if 0
812# define SCHED_LOAD_RESOLUTION 10
813# define scale_load(w) ((w) << SCHED_LOAD_RESOLUTION)
814# define scale_load_down(w) ((w) >> SCHED_LOAD_RESOLUTION)
815#else
816# define SCHED_LOAD_RESOLUTION 0
817# define scale_load(w) (w)
818# define scale_load_down(w) (w)
819#endif
820
821#define SCHED_LOAD_SHIFT (10 + SCHED_LOAD_RESOLUTION)
822#define SCHED_LOAD_SCALE (1L << SCHED_LOAD_SHIFT)
823
824
825
826
827#define SCHED_POWER_SHIFT 10
828#define SCHED_POWER_SCALE (1L << SCHED_POWER_SHIFT)
829
830
831
832
833#ifdef CONFIG_SMP
834#define SD_LOAD_BALANCE 0x0001
835#define SD_BALANCE_NEWIDLE 0x0002
836#define SD_BALANCE_EXEC 0x0004
837#define SD_BALANCE_FORK 0x0008
838#define SD_BALANCE_WAKE 0x0010
839#define SD_WAKE_AFFINE 0x0020
840#define SD_PREFER_LOCAL 0x0040
841#define SD_SHARE_CPUPOWER 0x0080
842#define SD_POWERSAVINGS_BALANCE 0x0100
843#define SD_SHARE_PKG_RESOURCES 0x0200
844#define SD_SERIALIZE 0x0400
845#define SD_ASYM_PACKING 0x0800
846#define SD_PREFER_SIBLING 0x1000
847#define SD_OVERLAP 0x2000
848
849enum powersavings_balance_level {
850 POWERSAVINGS_BALANCE_NONE = 0,
851 POWERSAVINGS_BALANCE_BASIC,
852
853
854 POWERSAVINGS_BALANCE_WAKEUP,
855
856
857 MAX_POWERSAVINGS_BALANCE_LEVELS
858};
859
860extern int sched_mc_power_savings, sched_smt_power_savings;
861
862static inline int sd_balance_for_mc_power(void)
863{
864 if (sched_smt_power_savings)
865 return SD_POWERSAVINGS_BALANCE;
866
867 if (!sched_mc_power_savings)
868 return SD_PREFER_SIBLING;
869
870 return 0;
871}
872
873static inline int sd_balance_for_package_power(void)
874{
875 if (sched_mc_power_savings | sched_smt_power_savings)
876 return SD_POWERSAVINGS_BALANCE;
877
878 return SD_PREFER_SIBLING;
879}
880
881extern int __weak arch_sd_sibiling_asym_packing(void);
882
883
884
885
886
887
888
889static inline int sd_power_saving_flags(void)
890{
891 if (sched_mc_power_savings | sched_smt_power_savings)
892 return SD_BALANCE_NEWIDLE;
893
894 return 0;
895}
896
897struct sched_group_power {
898 atomic_t ref;
899
900
901
902
903 unsigned int power, power_orig;
904};
905
906struct sched_group {
907 struct sched_group *next;
908 atomic_t ref;
909
910 unsigned int group_weight;
911 struct sched_group_power *sgp;
912
913
914
915
916
917
918
919
920 unsigned long cpumask[0];
921};
922
923static inline struct cpumask *sched_group_cpus(struct sched_group *sg)
924{
925 return to_cpumask(sg->cpumask);
926}
927
928struct sched_domain_attr {
929 int relax_domain_level;
930};
931
932#define SD_ATTR_INIT (struct sched_domain_attr) { \
933 .relax_domain_level = -1, \
934}
935
936extern int sched_domain_level_max;
937
938struct sched_domain {
939
940 struct sched_domain *parent;
941 struct sched_domain *child;
942 struct sched_group *groups;
943 unsigned long min_interval;
944 unsigned long max_interval;
945 unsigned int busy_factor;
946 unsigned int imbalance_pct;
947 unsigned int cache_nice_tries;
948 unsigned int busy_idx;
949 unsigned int idle_idx;
950 unsigned int newidle_idx;
951 unsigned int wake_idx;
952 unsigned int forkexec_idx;
953 unsigned int smt_gain;
954 int flags;
955 int level;
956
957
958 unsigned long last_balance;
959 unsigned int balance_interval;
960 unsigned int nr_balance_failed;
961
962 u64 last_update;
963
964#ifdef CONFIG_SCHEDSTATS
965
966 unsigned int lb_count[CPU_MAX_IDLE_TYPES];
967 unsigned int lb_failed[CPU_MAX_IDLE_TYPES];
968 unsigned int lb_balanced[CPU_MAX_IDLE_TYPES];
969 unsigned int lb_imbalance[CPU_MAX_IDLE_TYPES];
970 unsigned int lb_gained[CPU_MAX_IDLE_TYPES];
971 unsigned int lb_hot_gained[CPU_MAX_IDLE_TYPES];
972 unsigned int lb_nobusyg[CPU_MAX_IDLE_TYPES];
973 unsigned int lb_nobusyq[CPU_MAX_IDLE_TYPES];
974
975
976 unsigned int alb_count;
977 unsigned int alb_failed;
978 unsigned int alb_pushed;
979
980
981 unsigned int sbe_count;
982 unsigned int sbe_balanced;
983 unsigned int sbe_pushed;
984
985
986 unsigned int sbf_count;
987 unsigned int sbf_balanced;
988 unsigned int sbf_pushed;
989
990
991 unsigned int ttwu_wake_remote;
992 unsigned int ttwu_move_affine;
993 unsigned int ttwu_move_balance;
994#endif
995#ifdef CONFIG_SCHED_DEBUG
996 char *name;
997#endif
998 union {
999 void *private;
1000 struct rcu_head rcu;
1001 };
1002
1003 unsigned int span_weight;
1004
1005
1006
1007
1008
1009
1010
1011 unsigned long span[0];
1012};
1013
1014static inline struct cpumask *sched_domain_span(struct sched_domain *sd)
1015{
1016 return to_cpumask(sd->span);
1017}
1018
1019extern void partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],
1020 struct sched_domain_attr *dattr_new);
1021
1022
1023cpumask_var_t *alloc_sched_domains(unsigned int ndoms);
1024void free_sched_domains(cpumask_var_t doms[], unsigned int ndoms);
1025
1026
1027static inline int test_sd_parent(struct sched_domain *sd, int flag)
1028{
1029 if (sd->parent && (sd->parent->flags & flag))
1030 return 1;
1031
1032 return 0;
1033}
1034
1035unsigned long default_scale_freq_power(struct sched_domain *sd, int cpu);
1036unsigned long default_scale_smt_power(struct sched_domain *sd, int cpu);
1037
1038#else
1039
1040struct sched_domain_attr;
1041
1042static inline void
1043partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],
1044 struct sched_domain_attr *dattr_new)
1045{
1046}
1047#endif
1048
1049
1050struct io_context;
1051
1052
1053#ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
1054extern void prefetch_stack(struct task_struct *t);
1055#else
1056static inline void prefetch_stack(struct task_struct *t) { }
1057#endif
1058
1059struct audit_context;
1060struct mempolicy;
1061struct pipe_inode_info;
1062struct uts_namespace;
1063
1064struct rq;
1065struct sched_domain;
1066
1067
1068
1069
1070#define WF_SYNC 0x01
1071#define WF_FORK 0x02
1072#define WF_MIGRATED 0x04
1073
1074#define ENQUEUE_WAKEUP 1
1075#define ENQUEUE_HEAD 2
1076#ifdef CONFIG_SMP
1077#define ENQUEUE_WAKING 4
1078#else
1079#define ENQUEUE_WAKING 0
1080#endif
1081
1082#define DEQUEUE_SLEEP 1
1083
1084struct sched_class {
1085 const struct sched_class *next;
1086
1087 void (*enqueue_task) (struct rq *rq, struct task_struct *p, int flags);
1088 void (*dequeue_task) (struct rq *rq, struct task_struct *p, int flags);
1089 void (*yield_task) (struct rq *rq);
1090 bool (*yield_to_task) (struct rq *rq, struct task_struct *p, bool preempt);
1091
1092 void (*check_preempt_curr) (struct rq *rq, struct task_struct *p, int flags);
1093
1094 struct task_struct * (*pick_next_task) (struct rq *rq);
1095 void (*put_prev_task) (struct rq *rq, struct task_struct *p);
1096
1097#ifdef CONFIG_SMP
1098 int (*select_task_rq)(struct task_struct *p, int sd_flag, int flags);
1099
1100 void (*pre_schedule) (struct rq *this_rq, struct task_struct *task);
1101 void (*post_schedule) (struct rq *this_rq);
1102 void (*task_waking) (struct task_struct *task);
1103 void (*task_woken) (struct rq *this_rq, struct task_struct *task);
1104
1105 void (*set_cpus_allowed)(struct task_struct *p,
1106 const struct cpumask *newmask);
1107
1108 void (*rq_online)(struct rq *rq);
1109 void (*rq_offline)(struct rq *rq);
1110#endif
1111
1112 void (*set_curr_task) (struct rq *rq);
1113 void (*task_tick) (struct rq *rq, struct task_struct *p, int queued);
1114 void (*task_fork) (struct task_struct *p);
1115
1116 void (*switched_from) (struct rq *this_rq, struct task_struct *task);
1117 void (*switched_to) (struct rq *this_rq, struct task_struct *task);
1118 void (*prio_changed) (struct rq *this_rq, struct task_struct *task,
1119 int oldprio);
1120
1121 unsigned int (*get_rr_interval) (struct rq *rq,
1122 struct task_struct *task);
1123
1124#ifdef CONFIG_FAIR_GROUP_SCHED
1125 void (*task_move_group) (struct task_struct *p, int on_rq);
1126#endif
1127};
1128
1129struct load_weight {
1130 unsigned long weight, inv_weight;
1131};
1132
1133#ifdef CONFIG_SCHEDSTATS
1134struct sched_statistics {
1135 u64 wait_start;
1136 u64 wait_max;
1137 u64 wait_count;
1138 u64 wait_sum;
1139 u64 iowait_count;
1140 u64 iowait_sum;
1141
1142 u64 sleep_start;
1143 u64 sleep_max;
1144 s64 sum_sleep_runtime;
1145
1146 u64 block_start;
1147 u64 block_max;
1148 u64 exec_max;
1149 u64 slice_max;
1150
1151 u64 nr_migrations_cold;
1152 u64 nr_failed_migrations_affine;
1153 u64 nr_failed_migrations_running;
1154 u64 nr_failed_migrations_hot;
1155 u64 nr_forced_migrations;
1156
1157 u64 nr_wakeups;
1158 u64 nr_wakeups_sync;
1159 u64 nr_wakeups_migrate;
1160 u64 nr_wakeups_local;
1161 u64 nr_wakeups_remote;
1162 u64 nr_wakeups_affine;
1163 u64 nr_wakeups_affine_attempts;
1164 u64 nr_wakeups_passive;
1165 u64 nr_wakeups_idle;
1166};
1167#endif
1168
1169struct sched_entity {
1170 struct load_weight load;
1171 struct rb_node run_node;
1172 struct list_head group_node;
1173 unsigned int on_rq;
1174
1175 u64 exec_start;
1176 u64 sum_exec_runtime;
1177 u64 vruntime;
1178 u64 prev_sum_exec_runtime;
1179
1180 u64 nr_migrations;
1181
1182#ifdef CONFIG_SCHEDSTATS
1183 struct sched_statistics statistics;
1184#endif
1185
1186#ifdef CONFIG_FAIR_GROUP_SCHED
1187 struct sched_entity *parent;
1188
1189 struct cfs_rq *cfs_rq;
1190
1191 struct cfs_rq *my_q;
1192#endif
1193};
1194
1195struct sched_rt_entity {
1196 struct list_head run_list;
1197 unsigned long timeout;
1198 unsigned int time_slice;
1199 int nr_cpus_allowed;
1200
1201 struct sched_rt_entity *back;
1202#ifdef CONFIG_RT_GROUP_SCHED
1203 struct sched_rt_entity *parent;
1204
1205 struct rt_rq *rt_rq;
1206
1207 struct rt_rq *my_q;
1208#endif
1209};
1210
1211struct rcu_node;
1212
1213enum perf_event_task_context {
1214 perf_invalid_context = -1,
1215 perf_hw_context = 0,
1216 perf_sw_context,
1217 perf_nr_task_contexts,
1218};
1219
1220struct task_struct {
1221 volatile long state;
1222 void *stack;
1223 atomic_t usage;
1224 unsigned int flags;
1225 unsigned int ptrace;
1226
1227#ifdef CONFIG_SMP
1228 struct task_struct *wake_entry;
1229 int on_cpu;
1230#endif
1231 int on_rq;
1232
1233 int prio, static_prio, normal_prio;
1234 unsigned int rt_priority;
1235 const struct sched_class *sched_class;
1236 struct sched_entity se;
1237 struct sched_rt_entity rt;
1238
1239#ifdef CONFIG_PREEMPT_NOTIFIERS
1240
1241 struct hlist_head preempt_notifiers;
1242#endif
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252 unsigned char fpu_counter;
1253#ifdef CONFIG_BLK_DEV_IO_TRACE
1254 unsigned int btrace_seq;
1255#endif
1256
1257 unsigned int policy;
1258 cpumask_t cpus_allowed;
1259
1260#ifdef CONFIG_PREEMPT_RCU
1261 int rcu_read_lock_nesting;
1262 char rcu_read_unlock_special;
1263#if defined(CONFIG_RCU_BOOST) && defined(CONFIG_TREE_PREEMPT_RCU)
1264 int rcu_boosted;
1265#endif
1266 struct list_head rcu_node_entry;
1267#endif
1268#ifdef CONFIG_TREE_PREEMPT_RCU
1269 struct rcu_node *rcu_blocked_node;
1270#endif
1271#ifdef CONFIG_RCU_BOOST
1272 struct rt_mutex *rcu_boost_mutex;
1273#endif
1274
1275#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
1276 struct sched_info sched_info;
1277#endif
1278
1279 struct list_head tasks;
1280#ifdef CONFIG_SMP
1281 struct plist_node pushable_tasks;
1282#endif
1283
1284 struct mm_struct *mm, *active_mm;
1285#ifdef CONFIG_COMPAT_BRK
1286 unsigned brk_randomized:1;
1287#endif
1288#if defined(SPLIT_RSS_COUNTING)
1289 struct task_rss_stat rss_stat;
1290#endif
1291
1292 int exit_state;
1293 int exit_code, exit_signal;
1294 int pdeath_signal;
1295 unsigned int jobctl;
1296
1297 unsigned int personality;
1298 unsigned did_exec:1;
1299 unsigned in_execve:1;
1300
1301 unsigned in_iowait:1;
1302
1303
1304
1305 unsigned sched_reset_on_fork:1;
1306 unsigned sched_contributes_to_load:1;
1307
1308 pid_t pid;
1309 pid_t tgid;
1310
1311#ifdef CONFIG_CC_STACKPROTECTOR
1312
1313 unsigned long stack_canary;
1314#endif
1315
1316
1317
1318
1319
1320
1321 struct task_struct *real_parent;
1322 struct task_struct *parent;
1323
1324
1325
1326 struct list_head children;
1327 struct list_head sibling;
1328 struct task_struct *group_leader;
1329
1330
1331
1332
1333
1334
1335 struct list_head ptraced;
1336 struct list_head ptrace_entry;
1337
1338
1339 struct pid_link pids[PIDTYPE_MAX];
1340 struct list_head thread_group;
1341
1342 struct completion *vfork_done;
1343 int __user *set_child_tid;
1344 int __user *clear_child_tid;
1345
1346 cputime_t utime, stime, utimescaled, stimescaled;
1347 cputime_t gtime;
1348#ifndef CONFIG_VIRT_CPU_ACCOUNTING
1349 cputime_t prev_utime, prev_stime;
1350#endif
1351 unsigned long nvcsw, nivcsw;
1352 struct timespec start_time;
1353 struct timespec real_start_time;
1354
1355 unsigned long min_flt, maj_flt;
1356
1357 struct task_cputime cputime_expires;
1358 struct list_head cpu_timers[3];
1359
1360
1361 const struct cred __rcu *real_cred;
1362
1363 const struct cred __rcu *cred;
1364
1365 struct cred *replacement_session_keyring;
1366
1367 char comm[TASK_COMM_LEN];
1368
1369
1370
1371
1372 int link_count, total_link_count;
1373#ifdef CONFIG_SYSVIPC
1374
1375 struct sysv_sem sysvsem;
1376#endif
1377#ifdef CONFIG_DETECT_HUNG_TASK
1378
1379 unsigned long last_switch_count;
1380#endif
1381
1382 struct thread_struct thread;
1383
1384 struct fs_struct *fs;
1385
1386 struct files_struct *files;
1387
1388 struct nsproxy *nsproxy;
1389
1390 struct signal_struct *signal;
1391 struct sighand_struct *sighand;
1392
1393 sigset_t blocked, real_blocked;
1394 sigset_t saved_sigmask;
1395 struct sigpending pending;
1396
1397 unsigned long sas_ss_sp;
1398 size_t sas_ss_size;
1399 int (*notifier)(void *priv);
1400 void *notifier_data;
1401 sigset_t *notifier_mask;
1402 struct audit_context *audit_context;
1403#ifdef CONFIG_AUDITSYSCALL
1404 uid_t loginuid;
1405 unsigned int sessionid;
1406#endif
1407 seccomp_t seccomp;
1408
1409
1410 u32 parent_exec_id;
1411 u32 self_exec_id;
1412
1413
1414 spinlock_t alloc_lock;
1415
1416#ifdef CONFIG_GENERIC_HARDIRQS
1417
1418 struct irqaction *irqaction;
1419#endif
1420
1421
1422 raw_spinlock_t pi_lock;
1423
1424#ifdef CONFIG_RT_MUTEXES
1425
1426 struct plist_head pi_waiters;
1427
1428 struct rt_mutex_waiter *pi_blocked_on;
1429#endif
1430
1431#ifdef CONFIG_DEBUG_MUTEXES
1432
1433 struct mutex_waiter *blocked_on;
1434#endif
1435#ifdef CONFIG_TRACE_IRQFLAGS
1436 unsigned int irq_events;
1437 unsigned long hardirq_enable_ip;
1438 unsigned long hardirq_disable_ip;
1439 unsigned int hardirq_enable_event;
1440 unsigned int hardirq_disable_event;
1441 int hardirqs_enabled;
1442 int hardirq_context;
1443 unsigned long softirq_disable_ip;
1444 unsigned long softirq_enable_ip;
1445 unsigned int softirq_disable_event;
1446 unsigned int softirq_enable_event;
1447 int softirqs_enabled;
1448 int softirq_context;
1449#endif
1450#ifdef CONFIG_LOCKDEP
1451# define MAX_LOCK_DEPTH 48UL
1452 u64 curr_chain_key;
1453 int lockdep_depth;
1454 unsigned int lockdep_recursion;
1455 struct held_lock held_locks[MAX_LOCK_DEPTH];
1456 gfp_t lockdep_reclaim_gfp;
1457#endif
1458
1459
1460 void *journal_info;
1461
1462
1463 struct bio_list *bio_list;
1464
1465#ifdef CONFIG_BLOCK
1466
1467 struct blk_plug *plug;
1468#endif
1469
1470
1471 struct reclaim_state *reclaim_state;
1472
1473 struct backing_dev_info *backing_dev_info;
1474
1475 struct io_context *io_context;
1476
1477 unsigned long ptrace_message;
1478 siginfo_t *last_siginfo;
1479 struct task_io_accounting ioac;
1480#if defined(CONFIG_TASK_XACCT)
1481 u64 acct_rss_mem1;
1482 u64 acct_vm_mem1;
1483 cputime_t acct_timexpd;
1484#endif
1485#ifdef CONFIG_CPUSETS
1486 nodemask_t mems_allowed;
1487 int mems_allowed_change_disable;
1488 int cpuset_mem_spread_rotor;
1489 int cpuset_slab_spread_rotor;
1490#endif
1491#ifdef CONFIG_CGROUPS
1492
1493 struct css_set __rcu *cgroups;
1494
1495 struct list_head cg_list;
1496#endif
1497#ifdef CONFIG_FUTEX
1498 struct robust_list_head __user *robust_list;
1499#ifdef CONFIG_COMPAT
1500 struct compat_robust_list_head __user *compat_robust_list;
1501#endif
1502 struct list_head pi_state_list;
1503 struct futex_pi_state *pi_state_cache;
1504#endif
1505#ifdef CONFIG_PERF_EVENTS
1506 struct perf_event_context *perf_event_ctxp[perf_nr_task_contexts];
1507 struct mutex perf_event_mutex;
1508 struct list_head perf_event_list;
1509#endif
1510#ifdef CONFIG_NUMA
1511 struct mempolicy *mempolicy;
1512 short il_next;
1513 short pref_node_fork;
1514#endif
1515 struct rcu_head rcu;
1516
1517
1518
1519
1520 struct pipe_inode_info *splice_pipe;
1521#ifdef CONFIG_TASK_DELAY_ACCT
1522 struct task_delay_info *delays;
1523#endif
1524#ifdef CONFIG_FAULT_INJECTION
1525 int make_it_fail;
1526#endif
1527 struct prop_local_single dirties;
1528#ifdef CONFIG_LATENCYTOP
1529 int latency_record_count;
1530 struct latency_record latency_record[LT_SAVECOUNT];
1531#endif
1532
1533
1534
1535
1536 unsigned long timer_slack_ns;
1537 unsigned long default_timer_slack_ns;
1538
1539 struct list_head *scm_work_list;
1540#ifdef CONFIG_FUNCTION_GRAPH_TRACER
1541
1542 int curr_ret_stack;
1543
1544 struct ftrace_ret_stack *ret_stack;
1545
1546 unsigned long long ftrace_timestamp;
1547
1548
1549
1550
1551 atomic_t trace_overrun;
1552
1553 atomic_t tracing_graph_pause;
1554#endif
1555#ifdef CONFIG_TRACING
1556
1557 unsigned long trace;
1558
1559 unsigned long trace_recursion;
1560#endif
1561#ifdef CONFIG_CGROUP_MEM_RES_CTLR
1562 struct memcg_batch_info {
1563 int do_batch;
1564 struct mem_cgroup *memcg;
1565 unsigned long nr_pages;
1566 unsigned long memsw_nr_pages;
1567 } memcg_batch;
1568#endif
1569#ifdef CONFIG_HAVE_HW_BREAKPOINT
1570 atomic_t ptrace_bp_refcnt;
1571#endif
1572};
1573
1574
1575#define tsk_cpus_allowed(tsk) (&(tsk)->cpus_allowed)
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590#define MAX_USER_RT_PRIO 100
1591#define MAX_RT_PRIO MAX_USER_RT_PRIO
1592
1593#define MAX_PRIO (MAX_RT_PRIO + 40)
1594#define DEFAULT_PRIO (MAX_RT_PRIO + 20)
1595
1596static inline int rt_prio(int prio)
1597{
1598 if (unlikely(prio < MAX_RT_PRIO))
1599 return 1;
1600 return 0;
1601}
1602
1603static inline int rt_task(struct task_struct *p)
1604{
1605 return rt_prio(p->prio);
1606}
1607
1608static inline struct pid *task_pid(struct task_struct *task)
1609{
1610 return task->pids[PIDTYPE_PID].pid;
1611}
1612
1613static inline struct pid *task_tgid(struct task_struct *task)
1614{
1615 return task->group_leader->pids[PIDTYPE_PID].pid;
1616}
1617
1618
1619
1620
1621
1622
1623static inline struct pid *task_pgrp(struct task_struct *task)
1624{
1625 return task->group_leader->pids[PIDTYPE_PGID].pid;
1626}
1627
1628static inline struct pid *task_session(struct task_struct *task)
1629{
1630 return task->group_leader->pids[PIDTYPE_SID].pid;
1631}
1632
1633struct pid_namespace;
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648pid_t __task_pid_nr_ns(struct task_struct *task, enum pid_type type,
1649 struct pid_namespace *ns);
1650
1651static inline pid_t task_pid_nr(struct task_struct *tsk)
1652{
1653 return tsk->pid;
1654}
1655
1656static inline pid_t task_pid_nr_ns(struct task_struct *tsk,
1657 struct pid_namespace *ns)
1658{
1659 return __task_pid_nr_ns(tsk, PIDTYPE_PID, ns);
1660}
1661
1662static inline pid_t task_pid_vnr(struct task_struct *tsk)
1663{
1664 return __task_pid_nr_ns(tsk, PIDTYPE_PID, NULL);
1665}
1666
1667
1668static inline pid_t task_tgid_nr(struct task_struct *tsk)
1669{
1670 return tsk->tgid;
1671}
1672
1673pid_t task_tgid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
1674
1675static inline pid_t task_tgid_vnr(struct task_struct *tsk)
1676{
1677 return pid_vnr(task_tgid(tsk));
1678}
1679
1680
1681static inline pid_t task_pgrp_nr_ns(struct task_struct *tsk,
1682 struct pid_namespace *ns)
1683{
1684 return __task_pid_nr_ns(tsk, PIDTYPE_PGID, ns);
1685}
1686
1687static inline pid_t task_pgrp_vnr(struct task_struct *tsk)
1688{
1689 return __task_pid_nr_ns(tsk, PIDTYPE_PGID, NULL);
1690}
1691
1692
1693static inline pid_t task_session_nr_ns(struct task_struct *tsk,
1694 struct pid_namespace *ns)
1695{
1696 return __task_pid_nr_ns(tsk, PIDTYPE_SID, ns);
1697}
1698
1699static inline pid_t task_session_vnr(struct task_struct *tsk)
1700{
1701 return __task_pid_nr_ns(tsk, PIDTYPE_SID, NULL);
1702}
1703
1704
1705static inline pid_t task_pgrp_nr(struct task_struct *tsk)
1706{
1707 return task_pgrp_nr_ns(tsk, &init_pid_ns);
1708}
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718static inline int pid_alive(struct task_struct *p)
1719{
1720 return p->pids[PIDTYPE_PID].pid != NULL;
1721}
1722
1723
1724
1725
1726
1727
1728
1729static inline int is_global_init(struct task_struct *tsk)
1730{
1731 return tsk->pid == 1;
1732}
1733
1734
1735
1736
1737
1738extern int is_container_init(struct task_struct *tsk);
1739
1740extern struct pid *cad_pid;
1741
1742extern void free_task(struct task_struct *tsk);
1743#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
1744
1745extern void __put_task_struct(struct task_struct *t);
1746
1747static inline void put_task_struct(struct task_struct *t)
1748{
1749 if (atomic_dec_and_test(&t->usage))
1750 __put_task_struct(t);
1751}
1752
1753extern void task_times(struct task_struct *p, cputime_t *ut, cputime_t *st);
1754extern void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *st);
1755
1756
1757
1758
1759#define PF_STARTING 0x00000002
1760#define PF_EXITING 0x00000004
1761#define PF_EXITPIDONE 0x00000008
1762#define PF_VCPU 0x00000010
1763#define PF_WQ_WORKER 0x00000020
1764#define PF_FORKNOEXEC 0x00000040
1765#define PF_MCE_PROCESS 0x00000080
1766#define PF_SUPERPRIV 0x00000100
1767#define PF_DUMPCORE 0x00000200
1768#define PF_SIGNALED 0x00000400
1769#define PF_MEMALLOC 0x00000800
1770#define PF_NPROC_EXCEEDED 0x00001000
1771#define PF_USED_MATH 0x00002000
1772#define PF_FREEZING 0x00004000
1773#define PF_NOFREEZE 0x00008000
1774#define PF_FROZEN 0x00010000
1775#define PF_FSTRANS 0x00020000
1776#define PF_KSWAPD 0x00040000
1777#define PF_LESS_THROTTLE 0x00100000
1778#define PF_KTHREAD 0x00200000
1779#define PF_RANDOMIZE 0x00400000
1780#define PF_SWAPWRITE 0x00800000
1781#define PF_SPREAD_PAGE 0x01000000
1782#define PF_SPREAD_SLAB 0x02000000
1783#define PF_THREAD_BOUND 0x04000000
1784#define PF_MCE_EARLY 0x08000000
1785#define PF_MEMPOLICY 0x10000000
1786#define PF_MUTEX_TESTER 0x20000000
1787#define PF_FREEZER_SKIP 0x40000000
1788#define PF_FREEZER_NOSIG 0x80000000
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801#define clear_stopped_child_used_math(child) do { (child)->flags &= ~PF_USED_MATH; } while (0)
1802#define set_stopped_child_used_math(child) do { (child)->flags |= PF_USED_MATH; } while (0)
1803#define clear_used_math() clear_stopped_child_used_math(current)
1804#define set_used_math() set_stopped_child_used_math(current)
1805#define conditional_stopped_child_used_math(condition, child) \
1806 do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= (condition) ? PF_USED_MATH : 0; } while (0)
1807#define conditional_used_math(condition) \
1808 conditional_stopped_child_used_math(condition, current)
1809#define copy_to_stopped_child_used_math(child) \
1810 do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= current->flags & PF_USED_MATH; } while (0)
1811
1812#define tsk_used_math(p) ((p)->flags & PF_USED_MATH)
1813#define used_math() tsk_used_math(current)
1814
1815
1816
1817
1818#define JOBCTL_STOP_SIGMASK 0xffff
1819
1820#define JOBCTL_STOP_DEQUEUED_BIT 16
1821#define JOBCTL_STOP_PENDING_BIT 17
1822#define JOBCTL_STOP_CONSUME_BIT 18
1823#define JOBCTL_TRAP_STOP_BIT 19
1824#define JOBCTL_TRAP_NOTIFY_BIT 20
1825#define JOBCTL_TRAPPING_BIT 21
1826#define JOBCTL_LISTENING_BIT 22
1827
1828#define JOBCTL_STOP_DEQUEUED (1 << JOBCTL_STOP_DEQUEUED_BIT)
1829#define JOBCTL_STOP_PENDING (1 << JOBCTL_STOP_PENDING_BIT)
1830#define JOBCTL_STOP_CONSUME (1 << JOBCTL_STOP_CONSUME_BIT)
1831#define JOBCTL_TRAP_STOP (1 << JOBCTL_TRAP_STOP_BIT)
1832#define JOBCTL_TRAP_NOTIFY (1 << JOBCTL_TRAP_NOTIFY_BIT)
1833#define JOBCTL_TRAPPING (1 << JOBCTL_TRAPPING_BIT)
1834#define JOBCTL_LISTENING (1 << JOBCTL_LISTENING_BIT)
1835
1836#define JOBCTL_TRAP_MASK (JOBCTL_TRAP_STOP | JOBCTL_TRAP_NOTIFY)
1837#define JOBCTL_PENDING_MASK (JOBCTL_STOP_PENDING | JOBCTL_TRAP_MASK)
1838
1839extern bool task_set_jobctl_pending(struct task_struct *task,
1840 unsigned int mask);
1841extern void task_clear_jobctl_trapping(struct task_struct *task);
1842extern void task_clear_jobctl_pending(struct task_struct *task,
1843 unsigned int mask);
1844
1845#ifdef CONFIG_PREEMPT_RCU
1846
1847#define RCU_READ_UNLOCK_BLOCKED (1 << 0)
1848#define RCU_READ_UNLOCK_BOOSTED (1 << 1)
1849#define RCU_READ_UNLOCK_NEED_QS (1 << 2)
1850
1851static inline void rcu_copy_process(struct task_struct *p)
1852{
1853 p->rcu_read_lock_nesting = 0;
1854 p->rcu_read_unlock_special = 0;
1855#ifdef CONFIG_TREE_PREEMPT_RCU
1856 p->rcu_blocked_node = NULL;
1857#endif
1858#ifdef CONFIG_RCU_BOOST
1859 p->rcu_boost_mutex = NULL;
1860#endif
1861 INIT_LIST_HEAD(&p->rcu_node_entry);
1862}
1863
1864#else
1865
1866static inline void rcu_copy_process(struct task_struct *p)
1867{
1868}
1869
1870#endif
1871
1872#ifdef CONFIG_SMP
1873extern void do_set_cpus_allowed(struct task_struct *p,
1874 const struct cpumask *new_mask);
1875
1876extern int set_cpus_allowed_ptr(struct task_struct *p,
1877 const struct cpumask *new_mask);
1878#else
1879static inline void do_set_cpus_allowed(struct task_struct *p,
1880 const struct cpumask *new_mask)
1881{
1882}
1883static inline int set_cpus_allowed_ptr(struct task_struct *p,
1884 const struct cpumask *new_mask)
1885{
1886 if (!cpumask_test_cpu(0, new_mask))
1887 return -EINVAL;
1888 return 0;
1889}
1890#endif
1891
1892#ifndef CONFIG_CPUMASK_OFFSTACK
1893static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
1894{
1895 return set_cpus_allowed_ptr(p, &new_mask);
1896}
1897#endif
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907extern unsigned long long notrace sched_clock(void);
1908
1909
1910
1911extern u64 cpu_clock(int cpu);
1912extern u64 local_clock(void);
1913extern u64 sched_clock_cpu(int cpu);
1914
1915
1916extern void sched_clock_init(void);
1917
1918#ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
1919static inline void sched_clock_tick(void)
1920{
1921}
1922
1923static inline void sched_clock_idle_sleep_event(void)
1924{
1925}
1926
1927static inline void sched_clock_idle_wakeup_event(u64 delta_ns)
1928{
1929}
1930#else
1931
1932
1933
1934
1935
1936
1937extern int sched_clock_stable;
1938
1939extern void sched_clock_tick(void);
1940extern void sched_clock_idle_sleep_event(void);
1941extern void sched_clock_idle_wakeup_event(u64 delta_ns);
1942#endif
1943
1944#ifdef CONFIG_IRQ_TIME_ACCOUNTING
1945
1946
1947
1948
1949
1950extern void enable_sched_clock_irqtime(void);
1951extern void disable_sched_clock_irqtime(void);
1952#else
1953static inline void enable_sched_clock_irqtime(void) {}
1954static inline void disable_sched_clock_irqtime(void) {}
1955#endif
1956
1957extern unsigned long long
1958task_sched_runtime(struct task_struct *task);
1959
1960
1961#ifdef CONFIG_SMP
1962extern void sched_exec(void);
1963#else
1964#define sched_exec() {}
1965#endif
1966
1967extern void sched_clock_idle_sleep_event(void);
1968extern void sched_clock_idle_wakeup_event(u64 delta_ns);
1969
1970#ifdef CONFIG_HOTPLUG_CPU
1971extern void idle_task_exit(void);
1972#else
1973static inline void idle_task_exit(void) {}
1974#endif
1975
1976#if defined(CONFIG_NO_HZ) && defined(CONFIG_SMP)
1977extern void wake_up_idle_cpu(int cpu);
1978#else
1979static inline void wake_up_idle_cpu(int cpu) { }
1980#endif
1981
1982extern unsigned int sysctl_sched_latency;
1983extern unsigned int sysctl_sched_min_granularity;
1984extern unsigned int sysctl_sched_wakeup_granularity;
1985extern unsigned int sysctl_sched_child_runs_first;
1986
1987enum sched_tunable_scaling {
1988 SCHED_TUNABLESCALING_NONE,
1989 SCHED_TUNABLESCALING_LOG,
1990 SCHED_TUNABLESCALING_LINEAR,
1991 SCHED_TUNABLESCALING_END,
1992};
1993extern enum sched_tunable_scaling sysctl_sched_tunable_scaling;
1994
1995#ifdef CONFIG_SCHED_DEBUG
1996extern unsigned int sysctl_sched_migration_cost;
1997extern unsigned int sysctl_sched_nr_migrate;
1998extern unsigned int sysctl_sched_time_avg;
1999extern unsigned int sysctl_timer_migration;
2000extern unsigned int sysctl_sched_shares_window;
2001
2002int sched_proc_update_handler(struct ctl_table *table, int write,
2003 void __user *buffer, size_t *length,
2004 loff_t *ppos);
2005#endif
2006#ifdef CONFIG_SCHED_DEBUG
2007static inline unsigned int get_sysctl_timer_migration(void)
2008{
2009 return sysctl_timer_migration;
2010}
2011#else
2012static inline unsigned int get_sysctl_timer_migration(void)
2013{
2014 return 1;
2015}
2016#endif
2017extern unsigned int sysctl_sched_rt_period;
2018extern int sysctl_sched_rt_runtime;
2019
2020int sched_rt_handler(struct ctl_table *table, int write,
2021 void __user *buffer, size_t *lenp,
2022 loff_t *ppos);
2023
2024#ifdef CONFIG_SCHED_AUTOGROUP
2025extern unsigned int sysctl_sched_autogroup_enabled;
2026
2027extern void sched_autogroup_create_attach(struct task_struct *p);
2028extern void sched_autogroup_detach(struct task_struct *p);
2029extern void sched_autogroup_fork(struct signal_struct *sig);
2030extern void sched_autogroup_exit(struct signal_struct *sig);
2031#ifdef CONFIG_PROC_FS
2032extern void proc_sched_autogroup_show_task(struct task_struct *p, struct seq_file *m);
2033extern int proc_sched_autogroup_set_nice(struct task_struct *p, int *nice);
2034#endif
2035#else
2036static inline void sched_autogroup_create_attach(struct task_struct *p) { }
2037static inline void sched_autogroup_detach(struct task_struct *p) { }
2038static inline void sched_autogroup_fork(struct signal_struct *sig) { }
2039static inline void sched_autogroup_exit(struct signal_struct *sig) { }
2040#endif
2041
2042#ifdef CONFIG_RT_MUTEXES
2043extern int rt_mutex_getprio(struct task_struct *p);
2044extern void rt_mutex_setprio(struct task_struct *p, int prio);
2045extern void rt_mutex_adjust_pi(struct task_struct *p);
2046#else
2047static inline int rt_mutex_getprio(struct task_struct *p)
2048{
2049 return p->normal_prio;
2050}
2051# define rt_mutex_adjust_pi(p) do { } while (0)
2052#endif
2053
2054extern bool yield_to(struct task_struct *p, bool preempt);
2055extern void set_user_nice(struct task_struct *p, long nice);
2056extern int task_prio(const struct task_struct *p);
2057extern int task_nice(const struct task_struct *p);
2058extern int can_nice(const struct task_struct *p, const int nice);
2059extern int task_curr(const struct task_struct *p);
2060extern int idle_cpu(int cpu);
2061extern int sched_setscheduler(struct task_struct *, int,
2062 const struct sched_param *);
2063extern int sched_setscheduler_nocheck(struct task_struct *, int,
2064 const struct sched_param *);
2065extern struct task_struct *idle_task(int cpu);
2066extern struct task_struct *curr_task(int cpu);
2067extern void set_curr_task(int cpu, struct task_struct *p);
2068
2069void yield(void);
2070
2071
2072
2073
2074extern struct exec_domain default_exec_domain;
2075
2076union thread_union {
2077 struct thread_info thread_info;
2078 unsigned long stack[THREAD_SIZE/sizeof(long)];
2079};
2080
2081#ifndef __HAVE_ARCH_KSTACK_END
2082static inline int kstack_end(void *addr)
2083{
2084
2085
2086
2087 return !(((unsigned long)addr+sizeof(void*)-1) & (THREAD_SIZE-sizeof(void*)));
2088}
2089#endif
2090
2091extern union thread_union init_thread_union;
2092extern struct task_struct init_task;
2093
2094extern struct mm_struct init_mm;
2095
2096extern struct pid_namespace init_pid_ns;
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109extern struct task_struct *find_task_by_vpid(pid_t nr);
2110extern struct task_struct *find_task_by_pid_ns(pid_t nr,
2111 struct pid_namespace *ns);
2112
2113extern void __set_special_pids(struct pid *pid);
2114
2115
2116extern struct user_struct * alloc_uid(struct user_namespace *, uid_t);
2117static inline struct user_struct *get_uid(struct user_struct *u)
2118{
2119 atomic_inc(&u->__count);
2120 return u;
2121}
2122extern void free_uid(struct user_struct *);
2123extern void release_uids(struct user_namespace *ns);
2124
2125#include <asm/current.h>
2126
2127extern void xtime_update(unsigned long ticks);
2128
2129extern int wake_up_state(struct task_struct *tsk, unsigned int state);
2130extern int wake_up_process(struct task_struct *tsk);
2131extern void wake_up_new_task(struct task_struct *tsk);
2132#ifdef CONFIG_SMP
2133 extern void kick_process(struct task_struct *tsk);
2134#else
2135 static inline void kick_process(struct task_struct *tsk) { }
2136#endif
2137extern void sched_fork(struct task_struct *p);
2138extern void sched_dead(struct task_struct *p);
2139
2140extern void proc_caches_init(void);
2141extern void flush_signals(struct task_struct *);
2142extern void __flush_signals(struct task_struct *);
2143extern void ignore_signals(struct task_struct *);
2144extern void flush_signal_handlers(struct task_struct *, int force_default);
2145extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);
2146
2147static inline int dequeue_signal_lock(struct task_struct *tsk, sigset_t *mask, siginfo_t *info)
2148{
2149 unsigned long flags;
2150 int ret;
2151
2152 spin_lock_irqsave(&tsk->sighand->siglock, flags);
2153 ret = dequeue_signal(tsk, mask, info);
2154 spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
2155
2156 return ret;
2157}
2158
2159extern void block_all_signals(int (*notifier)(void *priv), void *priv,
2160 sigset_t *mask);
2161extern void unblock_all_signals(void);
2162extern void release_task(struct task_struct * p);
2163extern int send_sig_info(int, struct siginfo *, struct task_struct *);
2164extern int force_sigsegv(int, struct task_struct *);
2165extern int force_sig_info(int, struct siginfo *, struct task_struct *);
2166extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);
2167extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid);
2168extern int kill_pid_info_as_uid(int, struct siginfo *, struct pid *, uid_t, uid_t, u32);
2169extern int kill_pgrp(struct pid *pid, int sig, int priv);
2170extern int kill_pid(struct pid *pid, int sig, int priv);
2171extern int kill_proc_info(int, struct siginfo *, pid_t);
2172extern __must_check bool do_notify_parent(struct task_struct *, int);
2173extern void __wake_up_parent(struct task_struct *p, struct task_struct *parent);
2174extern void force_sig(int, struct task_struct *);
2175extern int send_sig(int, struct task_struct *, int);
2176extern int zap_other_threads(struct task_struct *p);
2177extern struct sigqueue *sigqueue_alloc(void);
2178extern void sigqueue_free(struct sigqueue *);
2179extern int send_sigqueue(struct sigqueue *, struct task_struct *, int group);
2180extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
2181extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long);
2182
2183static inline int kill_cad_pid(int sig, int priv)
2184{
2185 return kill_pid(cad_pid, sig, priv);
2186}
2187
2188
2189#define SEND_SIG_NOINFO ((struct siginfo *) 0)
2190#define SEND_SIG_PRIV ((struct siginfo *) 1)
2191#define SEND_SIG_FORCED ((struct siginfo *) 2)
2192
2193
2194
2195
2196static inline int on_sig_stack(unsigned long sp)
2197{
2198#ifdef CONFIG_STACK_GROWSUP
2199 return sp >= current->sas_ss_sp &&
2200 sp - current->sas_ss_sp < current->sas_ss_size;
2201#else
2202 return sp > current->sas_ss_sp &&
2203 sp - current->sas_ss_sp <= current->sas_ss_size;
2204#endif
2205}
2206
2207static inline int sas_ss_flags(unsigned long sp)
2208{
2209 return (current->sas_ss_size == 0 ? SS_DISABLE
2210 : on_sig_stack(sp) ? SS_ONSTACK : 0);
2211}
2212
2213
2214
2215
2216extern struct mm_struct * mm_alloc(void);
2217
2218
2219extern void __mmdrop(struct mm_struct *);
2220static inline void mmdrop(struct mm_struct * mm)
2221{
2222 if (unlikely(atomic_dec_and_test(&mm->mm_count)))
2223 __mmdrop(mm);
2224}
2225
2226
2227extern void mmput(struct mm_struct *);
2228
2229extern struct mm_struct *get_task_mm(struct task_struct *task);
2230
2231extern void mm_release(struct task_struct *, struct mm_struct *);
2232
2233extern struct mm_struct *dup_mm(struct task_struct *tsk);
2234
2235extern int copy_thread(unsigned long, unsigned long, unsigned long,
2236 struct task_struct *, struct pt_regs *);
2237extern void flush_thread(void);
2238extern void exit_thread(void);
2239
2240extern void exit_files(struct task_struct *);
2241extern void __cleanup_sighand(struct sighand_struct *);
2242
2243extern void exit_itimers(struct signal_struct *);
2244extern void flush_itimer_signals(void);
2245
2246extern NORET_TYPE void do_group_exit(int);
2247
2248extern void daemonize(const char *, ...);
2249extern int allow_signal(int);
2250extern int disallow_signal(int);
2251
2252extern int do_execve(const char *,
2253 const char __user * const __user *,
2254 const char __user * const __user *, struct pt_regs *);
2255extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);
2256struct task_struct *fork_idle(int);
2257
2258extern void set_task_comm(struct task_struct *tsk, char *from);
2259extern char *get_task_comm(char *to, struct task_struct *tsk);
2260
2261#ifdef CONFIG_SMP
2262void scheduler_ipi(void);
2263extern unsigned long wait_task_inactive(struct task_struct *, long match_state);
2264#else
2265static inline void scheduler_ipi(void) { }
2266static inline unsigned long wait_task_inactive(struct task_struct *p,
2267 long match_state)
2268{
2269 return 1;
2270}
2271#endif
2272
2273#define next_task(p) \
2274 list_entry_rcu((p)->tasks.next, struct task_struct, tasks)
2275
2276#define for_each_process(p) \
2277 for (p = &init_task ; (p = next_task(p)) != &init_task ; )
2278
2279extern bool current_is_single_threaded(void);
2280
2281
2282
2283
2284
2285#define do_each_thread(g, t) \
2286 for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do
2287
2288#define while_each_thread(g, t) \
2289 while ((t = next_thread(t)) != g)
2290
2291static inline int get_nr_threads(struct task_struct *tsk)
2292{
2293 return tsk->signal->nr_threads;
2294}
2295
2296static inline bool thread_group_leader(struct task_struct *p)
2297{
2298 return p->exit_signal >= 0;
2299}
2300
2301
2302
2303
2304
2305
2306
2307static inline int has_group_leader_pid(struct task_struct *p)
2308{
2309 return p->pid == p->tgid;
2310}
2311
2312static inline
2313int same_thread_group(struct task_struct *p1, struct task_struct *p2)
2314{
2315 return p1->tgid == p2->tgid;
2316}
2317
2318static inline struct task_struct *next_thread(const struct task_struct *p)
2319{
2320 return list_entry_rcu(p->thread_group.next,
2321 struct task_struct, thread_group);
2322}
2323
2324static inline int thread_group_empty(struct task_struct *p)
2325{
2326 return list_empty(&p->thread_group);
2327}
2328
2329#define delay_group_leader(p) \
2330 (thread_group_leader(p) && !thread_group_empty(p))
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342static inline void task_lock(struct task_struct *p)
2343{
2344 spin_lock(&p->alloc_lock);
2345}
2346
2347static inline void task_unlock(struct task_struct *p)
2348{
2349 spin_unlock(&p->alloc_lock);
2350}
2351
2352extern struct sighand_struct *__lock_task_sighand(struct task_struct *tsk,
2353 unsigned long *flags);
2354
2355#define lock_task_sighand(tsk, flags) \
2356({ struct sighand_struct *__ss; \
2357 __cond_lock(&(tsk)->sighand->siglock, \
2358 (__ss = __lock_task_sighand(tsk, flags))); \
2359 __ss; \
2360}) \
2361
2362static inline void unlock_task_sighand(struct task_struct *tsk,
2363 unsigned long *flags)
2364{
2365 spin_unlock_irqrestore(&tsk->sighand->siglock, *flags);
2366}
2367
2368
2369#ifdef CONFIG_CGROUPS
2370static inline void threadgroup_fork_read_lock(struct task_struct *tsk)
2371{
2372 down_read(&tsk->signal->threadgroup_fork_lock);
2373}
2374static inline void threadgroup_fork_read_unlock(struct task_struct *tsk)
2375{
2376 up_read(&tsk->signal->threadgroup_fork_lock);
2377}
2378static inline void threadgroup_fork_write_lock(struct task_struct *tsk)
2379{
2380 down_write(&tsk->signal->threadgroup_fork_lock);
2381}
2382static inline void threadgroup_fork_write_unlock(struct task_struct *tsk)
2383{
2384 up_write(&tsk->signal->threadgroup_fork_lock);
2385}
2386#else
2387static inline void threadgroup_fork_read_lock(struct task_struct *tsk) {}
2388static inline void threadgroup_fork_read_unlock(struct task_struct *tsk) {}
2389static inline void threadgroup_fork_write_lock(struct task_struct *tsk) {}
2390static inline void threadgroup_fork_write_unlock(struct task_struct *tsk) {}
2391#endif
2392
2393#ifndef __HAVE_THREAD_FUNCTIONS
2394
2395#define task_thread_info(task) ((struct thread_info *)(task)->stack)
2396#define task_stack_page(task) ((task)->stack)
2397
2398static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org)
2399{
2400 *task_thread_info(p) = *task_thread_info(org);
2401 task_thread_info(p)->task = p;
2402}
2403
2404static inline unsigned long *end_of_stack(struct task_struct *p)
2405{
2406 return (unsigned long *)(task_thread_info(p) + 1);
2407}
2408
2409#endif
2410
2411static inline int object_is_on_stack(void *obj)
2412{
2413 void *stack = task_stack_page(current);
2414
2415 return (obj >= stack) && (obj < (stack + THREAD_SIZE));
2416}
2417
2418extern void thread_info_cache_init(void);
2419
2420#ifdef CONFIG_DEBUG_STACK_USAGE
2421static inline unsigned long stack_not_used(struct task_struct *p)
2422{
2423 unsigned long *n = end_of_stack(p);
2424
2425 do {
2426 n++;
2427 } while (!*n);
2428
2429 return (unsigned long)n - (unsigned long)end_of_stack(p);
2430}
2431#endif
2432
2433
2434
2435
2436static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag)
2437{
2438 set_ti_thread_flag(task_thread_info(tsk), flag);
2439}
2440
2441static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag)
2442{
2443 clear_ti_thread_flag(task_thread_info(tsk), flag);
2444}
2445
2446static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag)
2447{
2448 return test_and_set_ti_thread_flag(task_thread_info(tsk), flag);
2449}
2450
2451static inline int test_and_clear_tsk_thread_flag(struct task_struct *tsk, int flag)
2452{
2453 return test_and_clear_ti_thread_flag(task_thread_info(tsk), flag);
2454}
2455
2456static inline int test_tsk_thread_flag(struct task_struct *tsk, int flag)
2457{
2458 return test_ti_thread_flag(task_thread_info(tsk), flag);
2459}
2460
2461static inline void set_tsk_need_resched(struct task_struct *tsk)
2462{
2463 set_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
2464}
2465
2466static inline void clear_tsk_need_resched(struct task_struct *tsk)
2467{
2468 clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
2469}
2470
2471static inline int test_tsk_need_resched(struct task_struct *tsk)
2472{
2473 return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED));
2474}
2475
2476static inline int restart_syscall(void)
2477{
2478 set_tsk_thread_flag(current, TIF_SIGPENDING);
2479 return -ERESTARTNOINTR;
2480}
2481
2482static inline int signal_pending(struct task_struct *p)
2483{
2484 return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));
2485}
2486
2487static inline int __fatal_signal_pending(struct task_struct *p)
2488{
2489 return unlikely(sigismember(&p->pending.signal, SIGKILL));
2490}
2491
2492static inline int fatal_signal_pending(struct task_struct *p)
2493{
2494 return signal_pending(p) && __fatal_signal_pending(p);
2495}
2496
2497static inline int signal_pending_state(long state, struct task_struct *p)
2498{
2499 if (!(state & (TASK_INTERRUPTIBLE | TASK_WAKEKILL)))
2500 return 0;
2501 if (!signal_pending(p))
2502 return 0;
2503
2504 return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p);
2505}
2506
2507static inline int need_resched(void)
2508{
2509 return unlikely(test_thread_flag(TIF_NEED_RESCHED));
2510}
2511
2512
2513
2514
2515
2516
2517
2518
2519extern int _cond_resched(void);
2520
2521#define cond_resched() ({ \
2522 __might_sleep(__FILE__, __LINE__, 0); \
2523 _cond_resched(); \
2524})
2525
2526extern int __cond_resched_lock(spinlock_t *lock);
2527
2528#ifdef CONFIG_PREEMPT_COUNT
2529#define PREEMPT_LOCK_OFFSET PREEMPT_OFFSET
2530#else
2531#define PREEMPT_LOCK_OFFSET 0
2532#endif
2533
2534#define cond_resched_lock(lock) ({ \
2535 __might_sleep(__FILE__, __LINE__, PREEMPT_LOCK_OFFSET); \
2536 __cond_resched_lock(lock); \
2537})
2538
2539extern int __cond_resched_softirq(void);
2540
2541#define cond_resched_softirq() ({ \
2542 __might_sleep(__FILE__, __LINE__, SOFTIRQ_DISABLE_OFFSET); \
2543 __cond_resched_softirq(); \
2544})
2545
2546
2547
2548
2549
2550
2551static inline int spin_needbreak(spinlock_t *lock)
2552{
2553#ifdef CONFIG_PREEMPT
2554 return spin_is_contended(lock);
2555#else
2556 return 0;
2557#endif
2558}
2559
2560
2561
2562
2563void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times);
2564void thread_group_cputimer(struct task_struct *tsk, struct task_cputime *times);
2565
2566static inline void thread_group_cputime_init(struct signal_struct *sig)
2567{
2568 spin_lock_init(&sig->cputimer.lock);
2569}
2570
2571
2572
2573
2574
2575
2576
2577extern void recalc_sigpending_and_wake(struct task_struct *t);
2578extern void recalc_sigpending(void);
2579
2580extern void signal_wake_up(struct task_struct *t, int resume_stopped);
2581
2582
2583
2584
2585#ifdef CONFIG_SMP
2586
2587static inline unsigned int task_cpu(const struct task_struct *p)
2588{
2589 return task_thread_info(p)->cpu;
2590}
2591
2592extern void set_task_cpu(struct task_struct *p, unsigned int cpu);
2593
2594#else
2595
2596static inline unsigned int task_cpu(const struct task_struct *p)
2597{
2598 return 0;
2599}
2600
2601static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
2602{
2603}
2604
2605#endif
2606
2607extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask);
2608extern long sched_getaffinity(pid_t pid, struct cpumask *mask);
2609
2610extern void normalize_rt_tasks(void);
2611
2612#ifdef CONFIG_CGROUP_SCHED
2613
2614extern struct task_group root_task_group;
2615
2616extern struct task_group *sched_create_group(struct task_group *parent);
2617extern void sched_destroy_group(struct task_group *tg);
2618extern void sched_move_task(struct task_struct *tsk);
2619#ifdef CONFIG_FAIR_GROUP_SCHED
2620extern int sched_group_set_shares(struct task_group *tg, unsigned long shares);
2621extern unsigned long sched_group_shares(struct task_group *tg);
2622#endif
2623#ifdef CONFIG_RT_GROUP_SCHED
2624extern int sched_group_set_rt_runtime(struct task_group *tg,
2625 long rt_runtime_us);
2626extern long sched_group_rt_runtime(struct task_group *tg);
2627extern int sched_group_set_rt_period(struct task_group *tg,
2628 long rt_period_us);
2629extern long sched_group_rt_period(struct task_group *tg);
2630extern int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk);
2631#endif
2632#endif
2633
2634extern int task_can_switch_user(struct user_struct *up,
2635 struct task_struct *tsk);
2636
2637#ifdef CONFIG_TASK_XACCT
2638static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
2639{
2640 tsk->ioac.rchar += amt;
2641}
2642
2643static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
2644{
2645 tsk->ioac.wchar += amt;
2646}
2647
2648static inline void inc_syscr(struct task_struct *tsk)
2649{
2650 tsk->ioac.syscr++;
2651}
2652
2653static inline void inc_syscw(struct task_struct *tsk)
2654{
2655 tsk->ioac.syscw++;
2656}
2657#else
2658static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
2659{
2660}
2661
2662static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
2663{
2664}
2665
2666static inline void inc_syscr(struct task_struct *tsk)
2667{
2668}
2669
2670static inline void inc_syscw(struct task_struct *tsk)
2671{
2672}
2673#endif
2674
2675#ifndef TASK_SIZE_OF
2676#define TASK_SIZE_OF(tsk) TASK_SIZE
2677#endif
2678
2679#ifdef CONFIG_MM_OWNER
2680extern void mm_update_next_owner(struct mm_struct *mm);
2681extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p);
2682#else
2683static inline void mm_update_next_owner(struct mm_struct *mm)
2684{
2685}
2686
2687static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
2688{
2689}
2690#endif
2691
2692static inline unsigned long task_rlimit(const struct task_struct *tsk,
2693 unsigned int limit)
2694{
2695 return ACCESS_ONCE(tsk->signal->rlim[limit].rlim_cur);
2696}
2697
2698static inline unsigned long task_rlimit_max(const struct task_struct *tsk,
2699 unsigned int limit)
2700{
2701 return ACCESS_ONCE(tsk->signal->rlim[limit].rlim_max);
2702}
2703
2704static inline unsigned long rlimit(unsigned int limit)
2705{
2706 return task_rlimit(current, limit);
2707}
2708
2709static inline unsigned long rlimit_max(unsigned int limit)
2710{
2711 return task_rlimit_max(current, limit);
2712}
2713
2714#endif
2715
2716#endif
2717