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Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / sched.h
CommitLineData
1da177e4
LT		 1#ifndef _LINUX_SCHED_H
2#define _LINUX_SCHED_H
3
b7b3c76a
DW		 4/*
5 * cloning flags:
6 */
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 */
071df104 25#define CLONE_NEWUTS 0x04000000 /* New utsname group? */
25b21cb2 26#define CLONE_NEWIPC 0x08000000 /* New ipcs */
77ec739d 27#define CLONE_NEWUSER 0x10000000 /* New user namespace */
30e49c26 28#define CLONE_NEWPID 0x20000000 /* New pid namespace */
169e3674 29#define CLONE_NEWNET 0x40000000 /* New network namespace */
fadad878 30#define CLONE_IO 0x80000000 /* Clone io context */
b7b3c76a
DW		 31
32/*
33 * Scheduling policies
34 */
35#define SCHED_NORMAL 0
36#define SCHED_FIFO 1
37#define SCHED_RR 2
38#define SCHED_BATCH 3
0e6aca43
IM		 39/* SCHED_ISO: reserved but not implemented yet */
40#define SCHED_IDLE 5
b7b3c76a 41
a3b6714e 42#ifdef __KERNEL__
b7b3c76a
DW		 43
44struct sched_param {
45 int sched_priority;
46};
47
1da177e4
LT		 48#include <asm/param.h> /* for HZ */
49
1da177e4
LT		 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>
c92ff1bd 61#include <linux/mm_types.h>
1da177e4
LT		 62
63#include <asm/system.h>
1da177e4
LT		 64#include <asm/page.h>
65#include <asm/ptrace.h>
1da177e4
LT		 66#include <asm/cputime.h>
67
68#include <linux/smp.h>
69#include <linux/sem.h>
70#include <linux/signal.h>
1da177e4
LT		 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>
3e26c149 77#include <linux/proportions.h>
1da177e4 78#include <linux/seccomp.h>
e56d0903 79#include <linux/rcupdate.h>
23f78d4a 80#include <linux/rtmutex.h>
1da177e4 81
a3b6714e
DW		 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>
7c3ab738 87#include <linux/task_io_accounting.h>
5cb350ba 88#include <linux/kobject.h>
9745512c 89#include <linux/latencytop.h>
9e2b2dc4 90#include <linux/cred.h>
a3b6714e
DW		 91
92#include <asm/processor.h>
36d57ac4 93
78fb7466 94struct mem_cgroup;
1da177e4 95struct exec_domain;
c87e2837 96struct futex_pi_state;
286100a6 97struct robust_list_head;
d89d8796 98struct bio;
1da177e4 99
1da177e4
LT		 100/*
101 * List of flags we want to share for kernel threads,
102 * if only because they are not used by them anyway.
103 */
104#define CLONE_KERNEL (CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
105
106/*
107 * These are the constant used to fake the fixed-point load-average
108 * counting. Some notes:
109 * - 11 bit fractions expand to 22 bits by the multiplies: this gives
110 * a load-average precision of 10 bits integer + 11 bits fractional
111 * - if you want to count load-averages more often, you need more
112 * precision, or rounding will get you. With 2-second counting freq,
113 * the EXP_n values would be 1981, 2034 and 2043 if still using only
114 * 11 bit fractions.
115 */
116extern unsigned long avenrun[]; /* Load averages */
117
118#define FSHIFT 11 /* nr of bits of precision */
119#define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */
0c2043ab 120#define LOAD_FREQ (5*HZ+1) /* 5 sec intervals */
1da177e4
LT		 121#define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */
122#define EXP_5 2014 /* 1/exp(5sec/5min) */
123#define EXP_15 2037 /* 1/exp(5sec/15min) */
124
125#define CALC_LOAD(load,exp,n) \
126 load *= exp; \
127 load += n*(FIXED_1-exp); \
128 load >>= FSHIFT;
129
130extern unsigned long total_forks;
131extern int nr_threads;
1da177e4
LT		 132DECLARE_PER_CPU(unsigned long, process_counts);
133extern int nr_processes(void);
134extern unsigned long nr_running(void);
135extern unsigned long nr_uninterruptible(void);
db1b1fef 136extern unsigned long nr_active(void);
1da177e4
LT		 137extern unsigned long nr_iowait(void);
138
43ae34cb
IM		 139struct seq_file;
140struct cfs_rq;
4cf86d77 141struct task_group;
43ae34cb
IM		 142#ifdef CONFIG_SCHED_DEBUG
143extern void proc_sched_show_task(struct task_struct *p, struct seq_file *m);
144extern void proc_sched_set_task(struct task_struct *p);
145extern void
5cef9eca 146print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq);
43ae34cb
IM		 147#else
148static inline void
149proc_sched_show_task(struct task_struct *p, struct seq_file *m)
150{
151}
152static inline void proc_sched_set_task(struct task_struct *p)
153{
154}
155static inline void
5cef9eca 156print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
43ae34cb
IM		 157{
158}
159#endif
1da177e4 160
690229a0
IM		 161extern unsigned long long time_sync_thresh;
162
4a8342d2
LT		 163/*
164 * Task state bitmask. NOTE! These bits are also
165 * encoded in fs/proc/array.c: get_task_state().
166 *
167 * We have two separate sets of flags: task->state
168 * is about runnability, while task->exit_state are
169 * about the task exiting. Confusing, but this way
170 * modifying one set can't modify the other one by
171 * mistake.
172 */
1da177e4
LT		 173#define TASK_RUNNING 0
174#define TASK_INTERRUPTIBLE 1
175#define TASK_UNINTERRUPTIBLE 2
f021a3c2
MW		 176#define __TASK_STOPPED 4
177#define __TASK_TRACED 8
4a8342d2
LT		 178/* in tsk->exit_state */
179#define EXIT_ZOMBIE 16
180#define EXIT_DEAD 32
181/* in tsk->state again */
af927232 182#define TASK_DEAD 64
f021a3c2
MW		 183#define TASK_WAKEKILL 128
184
185/* Convenience macros for the sake of set_task_state */
186#define TASK_KILLABLE (TASK_WAKEKILL | TASK_UNINTERRUPTIBLE)
187#define TASK_STOPPED (TASK_WAKEKILL | __TASK_STOPPED)
188#define TASK_TRACED (TASK_WAKEKILL | __TASK_TRACED)
1da177e4 189
92a1f4bc
MW		 190/* Convenience macros for the sake of wake_up */
191#define TASK_NORMAL (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE)
f021a3c2 192#define TASK_ALL (TASK_NORMAL | __TASK_STOPPED | __TASK_TRACED)
92a1f4bc
MW		 193
194/* get_task_state() */
195#define TASK_REPORT (TASK_RUNNING | TASK_INTERRUPTIBLE | \
f021a3c2
MW		 196 TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \
197 __TASK_TRACED)
92a1f4bc 198
f021a3c2
MW		 199#define task_is_traced(task) ((task->state & __TASK_TRACED) != 0)
200#define task_is_stopped(task) ((task->state & __TASK_STOPPED) != 0)
92a1f4bc 201#define task_is_stopped_or_traced(task) \
f021a3c2 202 ((task->state & (__TASK_STOPPED | __TASK_TRACED)) != 0)
92a1f4bc
MW		 203#define task_contributes_to_load(task) \
204 ((task->state & TASK_UNINTERRUPTIBLE) != 0)
1da177e4
LT		 205
206#define __set_task_state(tsk, state_value) \
207 do { (tsk)->state = (state_value); } while (0)
208#define set_task_state(tsk, state_value) \
209 set_mb((tsk)->state, (state_value))
210
498d0c57
AM		 211/*
212 * set_current_state() includes a barrier so that the write of current->state
213 * is correctly serialised wrt the caller's subsequent test of whether to
214 * actually sleep:
215 *
216 * set_current_state(TASK_UNINTERRUPTIBLE);
217 * if (do_i_need_to_sleep())
218 * schedule();
219 *
220 * If the caller does not need such serialisation then use __set_current_state()
221 */
1da177e4
LT		 222#define __set_current_state(state_value) \
223 do { current->state = (state_value); } while (0)
224#define set_current_state(state_value) \
225 set_mb(current->state, (state_value))
226
227/* Task command name length */
228#define TASK_COMM_LEN 16
229
1da177e4
LT		 230#include <linux/spinlock.h>
231
232/*
233 * This serializes "schedule()" and also protects
234 * the run-queue from deletions/modifications (but
235 * _adding_ to the beginning of the run-queue has
236 * a separate lock).
237 */
238extern rwlock_t tasklist_lock;
239extern spinlock_t mmlist_lock;
240
36c8b586 241struct task_struct;
1da177e4
LT		 242
243extern void sched_init(void);
244extern void sched_init_smp(void);
2d07b255 245extern asmlinkage void schedule_tail(struct task_struct *prev);
36c8b586 246extern void init_idle(struct task_struct *idle, int cpu);
1df21055 247extern void init_idle_bootup_task(struct task_struct *idle);
1da177e4 248
017730c1
IM		 249extern int runqueue_is_locked(void);
250
1da177e4 251extern cpumask_t nohz_cpu_mask;
46cb4b7c
SS		 252#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)
253extern int select_nohz_load_balancer(int cpu);
254#else
255static inline int select_nohz_load_balancer(int cpu)
256{
257 return 0;
258}
259#endif
1da177e4 260
48d5e258
PZ		 261extern unsigned long rt_needs_cpu(int cpu);
262
e59e2ae2 263/*
39bc89fd 264 * Only dump TASK_* tasks. (0 for all tasks)
e59e2ae2
IM		 265 */
266extern void show_state_filter(unsigned long state_filter);
267
268static inline void show_state(void)
269{
39bc89fd 270 show_state_filter(0);
e59e2ae2
IM		 271}
272
1da177e4
LT		 273extern void show_regs(struct pt_regs *);
274
275/*
276 * TASK is a pointer to the task whose backtrace we want to see (or NULL for current
277 * task), SP is the stack pointer of the first frame that should be shown in the back
278 * trace (or NULL if the entire call-chain of the task should be shown).
279 */
280extern void show_stack(struct task_struct *task, unsigned long *sp);
281
282void io_schedule(void);
283long io_schedule_timeout(long timeout);
284
285extern void cpu_init (void);
286extern void trap_init(void);
fa13a5a1 287extern void account_process_tick(struct task_struct *task, int user);
1da177e4
LT		 288extern void update_process_times(int user);
289extern void scheduler_tick(void);
8f4d37ec 290extern void hrtick_resched(void);
1da177e4 291
82a1fcb9
IM		 292extern void sched_show_task(struct task_struct *p);
293
8446f1d3 294#ifdef CONFIG_DETECT_SOFTLOCKUP
6687a97d 295extern void softlockup_tick(void);
8446f1d3 296extern void touch_softlockup_watchdog(void);
04c9167f 297extern void touch_all_softlockup_watchdogs(void);
9c44bc03 298extern unsigned int softlockup_panic;
82a1fcb9
IM		 299extern unsigned long sysctl_hung_task_check_count;
300extern unsigned long sysctl_hung_task_timeout_secs;
90739081 301extern unsigned long sysctl_hung_task_warnings;
9383d967 302extern int softlockup_thresh;
8446f1d3 303#else
6687a97d 304static inline void softlockup_tick(void)
8446f1d3
IM		 305{
306}
307static inline void spawn_softlockup_task(void)
308{
309}
310static inline void touch_softlockup_watchdog(void)
311{
312}
04c9167f
JF		 313static inline void touch_all_softlockup_watchdogs(void)
314{
315}
8446f1d3
IM		 316#endif
317
318
1da177e4
LT		 319/* Attach to any functions which should be ignored in wchan output. */
320#define __sched __attribute__((__section__(".sched.text")))
deaf2227
IM		 321
322/* Linker adds these: start and end of __sched functions */
323extern char __sched_text_start[], __sched_text_end[];
324
1da177e4
LT		 325/* Is this address in the __sched functions? */
326extern int in_sched_functions(unsigned long addr);
327
328#define MAX_SCHEDULE_TIMEOUT LONG_MAX
b3c97528 329extern signed long schedule_timeout(signed long timeout);
64ed93a2 330extern signed long schedule_timeout_interruptible(signed long timeout);
294d5cc2 331extern signed long schedule_timeout_killable(signed long timeout);
64ed93a2 332extern signed long schedule_timeout_uninterruptible(signed long timeout);
1da177e4
LT		 333asmlinkage void schedule(void);
334
ab516013 335struct nsproxy;
acce292c 336struct user_namespace;
1da177e4
LT		 337
338/* Maximum number of active map areas.. This is a random (large) number */
339#define DEFAULT_MAX_MAP_COUNT 65536
340
341extern int sysctl_max_map_count;
342
343#include <linux/aio.h>
344
345extern unsigned long
346arch_get_unmapped_area(struct file *, unsigned long, unsigned long,
347 unsigned long, unsigned long);
348extern unsigned long
349arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
350 unsigned long len, unsigned long pgoff,
351 unsigned long flags);
1363c3cd
WW		 352extern void arch_unmap_area(struct mm_struct *, unsigned long);
353extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
1da177e4 354
f412ac08
HD		 355#if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS
356/*
357 * The mm counters are not protected by its page_table_lock,
358 * so must be incremented atomically.
359 */
d3cb4871
CL		 360#define set_mm_counter(mm, member, value) atomic_long_set(&(mm)->_##member, value)
361#define get_mm_counter(mm, member) ((unsigned long)atomic_long_read(&(mm)->_##member))
362#define add_mm_counter(mm, member, value) atomic_long_add(value, &(mm)->_##member)
363#define inc_mm_counter(mm, member) atomic_long_inc(&(mm)->_##member)
364#define dec_mm_counter(mm, member) atomic_long_dec(&(mm)->_##member)
f412ac08
HD		 365
366#else /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
367/*
368 * The mm counters are protected by its page_table_lock,
369 * so can be incremented directly.
370 */
1da177e4
LT		 371#define set_mm_counter(mm, member, value) (mm)->_##member = (value)
372#define get_mm_counter(mm, member) ((mm)->_##member)
373#define add_mm_counter(mm, member, value) (mm)->_##member += (value)
374#define inc_mm_counter(mm, member) (mm)->_##member++
375#define dec_mm_counter(mm, member) (mm)->_##member--
f412ac08
HD		 376
377#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
4294621f 378
f412ac08
HD		 379#define get_mm_rss(mm) \
380 (get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss))
365e9c87
HD		 381#define update_hiwater_rss(mm) do { \
382 unsigned long _rss = get_mm_rss(mm); \
383 if ((mm)->hiwater_rss < _rss) \
384 (mm)->hiwater_rss = _rss; \
385} while (0)
386#define update_hiwater_vm(mm) do { \
387 if ((mm)->hiwater_vm < (mm)->total_vm) \
388 (mm)->hiwater_vm = (mm)->total_vm; \
389} while (0)
390
6c5d5238
KH		 391extern void set_dumpable(struct mm_struct *mm, int value);
392extern int get_dumpable(struct mm_struct *mm);
393
394/* mm flags */
3cb4a0bb 395/* dumpable bits */
6c5d5238
KH		 396#define MMF_DUMPABLE 0 /* core dump is permitted */
397#define MMF_DUMP_SECURELY 1 /* core file is readable only by root */
3cb4a0bb
KH		 398#define MMF_DUMPABLE_BITS 2
399
400/* coredump filter bits */
401#define MMF_DUMP_ANON_PRIVATE 2
402#define MMF_DUMP_ANON_SHARED 3
403#define MMF_DUMP_MAPPED_PRIVATE 4
404#define MMF_DUMP_MAPPED_SHARED 5
82df3973 405#define MMF_DUMP_ELF_HEADERS 6
3cb4a0bb 406#define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS
82df3973 407#define MMF_DUMP_FILTER_BITS 5
3cb4a0bb
KH		 408#define MMF_DUMP_FILTER_MASK \
409 (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
410#define MMF_DUMP_FILTER_DEFAULT \
411 ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED))
6c5d5238 412
1da177e4
LT		 413struct sighand_struct {
414 atomic_t count;
415 struct k_sigaction action[_NSIG];
416 spinlock_t siglock;
b8fceee1 417 wait_queue_head_t signalfd_wqh;
1da177e4
LT		 418};
419
0e464814 420struct pacct_struct {
f6ec29a4
KK		 421 int ac_flag;
422 long ac_exitcode;
0e464814 423 unsigned long ac_mem;
77787bfb
KK		 424 cputime_t ac_utime, ac_stime;
425 unsigned long ac_minflt, ac_majflt;
0e464814
KK		 426};
427
1da177e4
LT		 428/*
429 * NOTE! "signal_struct" does not have it's own
430 * locking, because a shared signal_struct always
431 * implies a shared sighand_struct, so locking
432 * sighand_struct is always a proper superset of
433 * the locking of signal_struct.
434 */
435struct signal_struct {
436 atomic_t count;
437 atomic_t live;
438
439 wait_queue_head_t wait_chldexit; /* for wait4() */
440
441 /* current thread group signal load-balancing target: */
36c8b586 442 struct task_struct *curr_target;
1da177e4
LT		 443
444 /* shared signal handling: */
445 struct sigpending shared_pending;
446
447 /* thread group exit support */
448 int group_exit_code;
449 /* overloaded:
450 * - notify group_exit_task when ->count is equal to notify_count
451 * - everyone except group_exit_task is stopped during signal delivery
452 * of fatal signals, group_exit_task processes the signal.
453 */
454 struct task_struct *group_exit_task;
455 int notify_count;
456
457 /* thread group stop support, overloads group_exit_code too */
458 int group_stop_count;
459 unsigned int flags; /* see SIGNAL_* flags below */
460
461 /* POSIX.1b Interval Timers */
462 struct list_head posix_timers;
463
464 /* ITIMER_REAL timer for the process */
2ff678b8 465 struct hrtimer real_timer;
fea9d175 466 struct pid *leader_pid;
2ff678b8 467 ktime_t it_real_incr;
1da177e4
LT		 468
469 /* ITIMER_PROF and ITIMER_VIRTUAL timers for the process */
470 cputime_t it_prof_expires, it_virt_expires;
471 cputime_t it_prof_incr, it_virt_incr;
472
473 /* job control IDs */
9a2e7057
PE		 474
475 /*
476 * pgrp and session fields are deprecated.
477 * use the task_session_Xnr and task_pgrp_Xnr routines below
478 */
479
480 union {
481 pid_t pgrp __deprecated;
482 pid_t __pgrp;
483 };
484
ab521dc0 485 struct pid *tty_old_pgrp;
1ec320af
CLG		 486
487 union {
488 pid_t session __deprecated;
489 pid_t __session;
490 };
491
1da177e4
LT		 492 /* boolean value for session group leader */
493 int leader;
494
495 struct tty_struct *tty; /* NULL if no tty */
496
497 /*
498 * Cumulative resource counters for dead threads in the group,
499 * and for reaped dead child processes forked by this group.
500 * Live threads maintain their own counters and add to these
501 * in __exit_signal, except for the group leader.
502 */
503 cputime_t utime, stime, cutime, cstime;
9ac52315
LV		 504 cputime_t gtime;
505 cputime_t cgtime;
1da177e4
LT		 506 unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
507 unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
6eaeeaba 508 unsigned long inblock, oublock, cinblock, coublock;
940389b8 509 struct task_io_accounting ioac;
1da177e4
LT		 510
511 /*
512 * Cumulative ns of scheduled CPU time for dead threads in the
513 * group, not including a zombie group leader. (This only differs
514 * from jiffies_to_ns(utime + stime) if sched_clock uses something
515 * other than jiffies.)
516 */
41b86e9c 517 unsigned long long sum_sched_runtime;
1da177e4
LT		 518
519 /*
520 * We don't bother to synchronize most readers of this at all,
521 * because there is no reader checking a limit that actually needs
522 * to get both rlim_cur and rlim_max atomically, and either one
523 * alone is a single word that can safely be read normally.
524 * getrlimit/setrlimit use task_lock(current->group_leader) to
525 * protect this instead of the siglock, because they really
526 * have no need to disable irqs.
527 */
528 struct rlimit rlim[RLIM_NLIMITS];
529
530 struct list_head cpu_timers[3];
531
532 /* keep the process-shared keyrings here so that they do the right
533 * thing in threads created with CLONE_THREAD */
534#ifdef CONFIG_KEYS
535 struct key *session_keyring; /* keyring inherited over fork */
536 struct key *process_keyring; /* keyring private to this process */
537#endif
0e464814
KK		 538#ifdef CONFIG_BSD_PROCESS_ACCT
539 struct pacct_struct pacct; /* per-process accounting information */
540#endif
ad4ecbcb 541#ifdef CONFIG_TASKSTATS
ad4ecbcb
SN		 542 struct taskstats *stats;
543#endif
522ed776
MT		 544#ifdef CONFIG_AUDIT
545 unsigned audit_tty;
546 struct tty_audit_buf *tty_audit_buf;
547#endif
1da177e4
LT		 548};
549
4866cde0
NP		 550/* Context switch must be unlocked if interrupts are to be enabled */
551#ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW
552# define __ARCH_WANT_UNLOCKED_CTXSW
553#endif
554
1da177e4
LT		 555/*
556 * Bits in flags field of signal_struct.
557 */
558#define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */
559#define SIGNAL_STOP_DEQUEUED 0x00000002 /* stop signal dequeued */
560#define SIGNAL_STOP_CONTINUED 0x00000004 /* SIGCONT since WCONTINUED reap */
561#define SIGNAL_GROUP_EXIT 0x00000008 /* group exit in progress */
e4420551
ON		 562/*
563 * Pending notifications to parent.
564 */
565#define SIGNAL_CLD_STOPPED 0x00000010
566#define SIGNAL_CLD_CONTINUED 0x00000020
567#define SIGNAL_CLD_MASK (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED)
1da177e4 568
fae5fa44
ON		 569#define SIGNAL_UNKILLABLE 0x00000040 /* for init: ignore fatal signals */
570
ed5d2cac
ON		 571/* If true, all threads except ->group_exit_task have pending SIGKILL */
572static inline int signal_group_exit(const struct signal_struct *sig)
573{
574 return (sig->flags & SIGNAL_GROUP_EXIT) ||
575 (sig->group_exit_task != NULL);
576}
577
1da177e4
LT		 578/*
579 * Some day this will be a full-fledged user tracking system..
580 */
581struct user_struct {
582 atomic_t __count; /* reference count */
583 atomic_t processes; /* How many processes does this user have? */
584 atomic_t files; /* How many open files does this user have? */
585 atomic_t sigpending; /* How many pending signals does this user have? */
2d9048e2 586#ifdef CONFIG_INOTIFY_USER
0eeca283
RL		 587 atomic_t inotify_watches; /* How many inotify watches does this user have? */
588 atomic_t inotify_devs; /* How many inotify devs does this user have opened? */
589#endif
970a8645 590#ifdef CONFIG_POSIX_MQUEUE
1da177e4
LT		 591 /* protected by mq_lock */
592 unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
970a8645 593#endif
1da177e4
LT		 594 unsigned long locked_shm; /* How many pages of mlocked shm ? */
595
596#ifdef CONFIG_KEYS
597 struct key *uid_keyring; /* UID specific keyring */
598 struct key *session_keyring; /* UID's default session keyring */
599#endif
600
601 /* Hash table maintenance information */
735de223 602 struct hlist_node uidhash_node;
1da177e4 603 uid_t uid;
24e377a8 604
052f1dc7 605#ifdef CONFIG_USER_SCHED
4cf86d77 606 struct task_group *tg;
b1a8c172 607#ifdef CONFIG_SYSFS
eb41d946 608 struct kobject kobj;
5cb350ba 609 struct work_struct work;
24e377a8 610#endif
b1a8c172 611#endif
1da177e4
LT		 612};
613
eb41d946 614extern int uids_sysfs_init(void);
5cb350ba 615
1da177e4
LT		 616extern struct user_struct *find_user(uid_t);
617
618extern struct user_struct root_user;
619#define INIT_USER (&root_user)
620
1da177e4
LT		 621struct backing_dev_info;
622struct reclaim_state;
623
52f17b6c 624#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
1da177e4
LT		 625struct sched_info {
626 /* cumulative counters */
2d72376b 627 unsigned long pcount; /* # of times run on this cpu */
172ba844
BS		 628 unsigned long long cpu_time, /* time spent on the cpu */
629 run_delay; /* time spent waiting on a runqueue */
1da177e4
LT		 630
631 /* timestamps */
172ba844
BS		 632 unsigned long long last_arrival,/* when we last ran on a cpu */
633 last_queued; /* when we were last queued to run */
b8efb561
IM		 634#ifdef CONFIG_SCHEDSTATS
635 /* BKL stats */
480b9434 636 unsigned int bkl_count;
b8efb561 637#endif
1da177e4 638};
52f17b6c 639#endif /* defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT) */
1da177e4 640
52f17b6c 641#ifdef CONFIG_SCHEDSTATS
15ad7cdc 642extern const struct file_operations proc_schedstat_operations;
52f17b6c 643#endif /* CONFIG_SCHEDSTATS */
1da177e4 644
ca74e92b
SN		 645#ifdef CONFIG_TASK_DELAY_ACCT
646struct task_delay_info {
647 spinlock_t lock;
648 unsigned int flags; /* Private per-task flags */
649
650 /* For each stat XXX, add following, aligned appropriately
651 *
652 * struct timespec XXX_start, XXX_end;
653 * u64 XXX_delay;
654 * u32 XXX_count;
655 *
656 * Atomicity of updates to XXX_delay, XXX_count protected by
657 * single lock above (split into XXX_lock if contention is an issue).
658 */
0ff92245
SN		 659
660 /*
661 * XXX_count is incremented on every XXX operation, the delay
662 * associated with the operation is added to XXX_delay.
663 * XXX_delay contains the accumulated delay time in nanoseconds.
664 */
665 struct timespec blkio_start, blkio_end; /* Shared by blkio, swapin */
666 u64 blkio_delay; /* wait for sync block io completion */
667 u64 swapin_delay; /* wait for swapin block io completion */
668 u32 blkio_count; /* total count of the number of sync block */
669 /* io operations performed */
670 u32 swapin_count; /* total count of the number of swapin block */
671 /* io operations performed */
873b4771
KK		 672
673 struct timespec freepages_start, freepages_end;
674 u64 freepages_delay; /* wait for memory reclaim */
675 u32 freepages_count; /* total count of memory reclaim */
ca74e92b 676};
52f17b6c
CS		 677#endif /* CONFIG_TASK_DELAY_ACCT */
678
679static inline int sched_info_on(void)
680{
681#ifdef CONFIG_SCHEDSTATS
682 return 1;
683#elif defined(CONFIG_TASK_DELAY_ACCT)
684 extern int delayacct_on;
685 return delayacct_on;
686#else
687 return 0;
ca74e92b 688#endif
52f17b6c 689}
ca74e92b 690
d15bcfdb
IM		 691enum cpu_idle_type {
692 CPU_IDLE,
693 CPU_NOT_IDLE,
694 CPU_NEWLY_IDLE,
695 CPU_MAX_IDLE_TYPES
1da177e4
LT		 696};
697
698/*
699 * sched-domains (multiprocessor balancing) declarations:
700 */
9aa7b369
IM		 701
702/*
703 * Increase resolution of nice-level calculations:
704 */
705#define SCHED_LOAD_SHIFT 10
706#define SCHED_LOAD_SCALE (1L << SCHED_LOAD_SHIFT)
707
f8700df7 708#define SCHED_LOAD_SCALE_FUZZ SCHED_LOAD_SCALE
1da177e4 709
2dd73a4f 710#ifdef CONFIG_SMP
1da177e4
LT		 711#define SD_LOAD_BALANCE 1 /* Do load balancing on this domain. */
712#define SD_BALANCE_NEWIDLE 2 /* Balance when about to become idle */
713#define SD_BALANCE_EXEC 4 /* Balance on exec */
147cbb4b
NP		 714#define SD_BALANCE_FORK 8 /* Balance on fork, clone */
715#define SD_WAKE_IDLE 16 /* Wake to idle CPU on task wakeup */
716#define SD_WAKE_AFFINE 32 /* Wake task to waking CPU */
717#define SD_WAKE_BALANCE 64 /* Perform balancing at task wakeup */
718#define SD_SHARE_CPUPOWER 128 /* Domain members share cpu power */
5c45bf27 719#define SD_POWERSAVINGS_BALANCE 256 /* Balance for power savings */
89c4710e 720#define SD_SHARE_PKG_RESOURCES 512 /* Domain members share cpu pkg resources */
08c183f3 721#define SD_SERIALIZE 1024 /* Only a single load balancing instance */
1d3504fc 722#define SD_WAKE_IDLE_FAR 2048 /* Gain latency sacrificing cache hit */
5c45bf27 723
89c4710e
SS		 724#define BALANCE_FOR_MC_POWER \
725 (sched_smt_power_savings ? SD_POWERSAVINGS_BALANCE : 0)
726
727#define BALANCE_FOR_PKG_POWER \
728 ((sched_mc_power_savings || sched_smt_power_savings) ? \
729 SD_POWERSAVINGS_BALANCE : 0)
730
731#define test_sd_parent(sd, flag) ((sd->parent && \
732 (sd->parent->flags & flag)) ? 1 : 0)
5c45bf27 733
1da177e4
LT		 734
735struct sched_group {
736 struct sched_group *next; /* Must be a circular list */
737 cpumask_t cpumask;
738
739 /*
740 * CPU power of this group, SCHED_LOAD_SCALE being max power for a
741 * single CPU. This is read only (except for setup, hotplug CPU).
5517d86b 742 * Note : Never change cpu_power without recompute its reciprocal
1da177e4 743 */
5517d86b
ED		 744 unsigned int __cpu_power;
745 /*
746 * reciprocal value of cpu_power to avoid expensive divides
747 * (see include/linux/reciprocal_div.h)
748 */
749 u32 reciprocal_cpu_power;
1da177e4
LT		 750};
751
1d3504fc
HS		 752enum sched_domain_level {
753 SD_LV_NONE = 0,
754 SD_LV_SIBLING,
755 SD_LV_MC,
756 SD_LV_CPU,
757 SD_LV_NODE,
758 SD_LV_ALLNODES,
759 SD_LV_MAX
760};
761
762struct sched_domain_attr {
763 int relax_domain_level;
764};
765
766#define SD_ATTR_INIT (struct sched_domain_attr) { \
767 .relax_domain_level = -1, \
768}
769
1da177e4
LT		 770struct sched_domain {
771 /* These fields must be setup */
772 struct sched_domain *parent; /* top domain must be null terminated */
1a848870 773 struct sched_domain *child; /* bottom domain must be null terminated */
1da177e4
LT		 774 struct sched_group *groups; /* the balancing groups of the domain */
775 cpumask_t span; /* span of all CPUs in this domain */
776 unsigned long min_interval; /* Minimum balance interval ms */
777 unsigned long max_interval; /* Maximum balance interval ms */
778 unsigned int busy_factor; /* less balancing by factor if busy */
779 unsigned int imbalance_pct; /* No balance until over watermark */
1da177e4 780 unsigned int cache_nice_tries; /* Leave cache hot tasks for # tries */
7897986b
NP		 781 unsigned int busy_idx;
782 unsigned int idle_idx;
783 unsigned int newidle_idx;
784 unsigned int wake_idx;
147cbb4b 785 unsigned int forkexec_idx;
1da177e4 786 int flags; /* See SD_* */
1d3504fc 787 enum sched_domain_level level;
1da177e4
LT		 788
789 /* Runtime fields. */
790 unsigned long last_balance; /* init to jiffies. units in jiffies */
791 unsigned int balance_interval; /* initialise to 1. units in ms. */
792 unsigned int nr_balance_failed; /* initialise to 0 */
793
2398f2c6
PZ		 794 u64 last_update;
795
1da177e4
LT		 796#ifdef CONFIG_SCHEDSTATS
797 /* load_balance() stats */
480b9434
KC		 798 unsigned int lb_count[CPU_MAX_IDLE_TYPES];
799 unsigned int lb_failed[CPU_MAX_IDLE_TYPES];
800 unsigned int lb_balanced[CPU_MAX_IDLE_TYPES];
801 unsigned int lb_imbalance[CPU_MAX_IDLE_TYPES];
802 unsigned int lb_gained[CPU_MAX_IDLE_TYPES];
803 unsigned int lb_hot_gained[CPU_MAX_IDLE_TYPES];
804 unsigned int lb_nobusyg[CPU_MAX_IDLE_TYPES];
805 unsigned int lb_nobusyq[CPU_MAX_IDLE_TYPES];
1da177e4
LT		 806
807 /* Active load balancing */
480b9434
KC		 808 unsigned int alb_count;
809 unsigned int alb_failed;
810 unsigned int alb_pushed;
1da177e4 811
68767a0a 812 /* SD_BALANCE_EXEC stats */
480b9434
KC		 813 unsigned int sbe_count;
814 unsigned int sbe_balanced;
815 unsigned int sbe_pushed;
1da177e4 816
68767a0a 817 /* SD_BALANCE_FORK stats */
480b9434
KC		 818 unsigned int sbf_count;
819 unsigned int sbf_balanced;
820 unsigned int sbf_pushed;
68767a0a 821
1da177e4 822 /* try_to_wake_up() stats */
480b9434
KC		 823 unsigned int ttwu_wake_remote;
824 unsigned int ttwu_move_affine;
825 unsigned int ttwu_move_balance;
1da177e4
LT		 826#endif
827};
828
1d3504fc
HS		 829extern void partition_sched_domains(int ndoms_new, cpumask_t *doms_new,
830 struct sched_domain_attr *dattr_new);
9aefd0ab 831extern int arch_reinit_sched_domains(void);
029190c5 832
1b427c15
IM		 833#else /* CONFIG_SMP */
834
835struct sched_domain_attr;
836
837static inline void
838partition_sched_domains(int ndoms_new, cpumask_t *doms_new,
839 struct sched_domain_attr *dattr_new)
840{
841}
842#endif /* !CONFIG_SMP */
1da177e4 843
1da177e4 844struct io_context; /* See blkdev.h */
1da177e4 845#define NGROUPS_SMALL 32
1bf47346 846#define NGROUPS_PER_BLOCK ((unsigned int)(PAGE_SIZE / sizeof(gid_t)))
1da177e4
LT		 847struct group_info {
848 int ngroups;
849 atomic_t usage;
850 gid_t small_block[NGROUPS_SMALL];
851 int nblocks;
852 gid_t *blocks[0];
853};
854
855/*
856 * get_group_info() must be called with the owning task locked (via task_lock())
857 * when task != current. The reason being that the vast majority of callers are
858 * looking at current->group_info, which can not be changed except by the
859 * current task. Changing current->group_info requires the task lock, too.
860 */
861#define get_group_info(group_info) do { \
862 atomic_inc(&(group_info)->usage); \
863} while (0)
864
865#define put_group_info(group_info) do { \
866 if (atomic_dec_and_test(&(group_info)->usage)) \
867 groups_free(group_info); \
868} while (0)
869
3e30148c
DH		 870extern struct group_info *groups_alloc(int gidsetsize);
871extern void groups_free(struct group_info *group_info);
872extern int set_current_groups(struct group_info *group_info);
873extern int groups_search(struct group_info *group_info, gid_t grp);
1da177e4
LT		 874/* access the groups "array" with this macro */
875#define GROUP_AT(gi, i) \
876 ((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
877
383f2835 878#ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
36c8b586 879extern void prefetch_stack(struct task_struct *t);
383f2835
KC		 880#else
881static inline void prefetch_stack(struct task_struct *t) { }
882#endif
1da177e4
LT		 883
884struct audit_context; /* See audit.c */
885struct mempolicy;
b92ce558 886struct pipe_inode_info;
4865ecf1 887struct uts_namespace;
1da177e4 888
20b8a59f
IM		 889struct rq;
890struct sched_domain;
891
892struct sched_class {
5522d5d5 893 const struct sched_class *next;
20b8a59f 894
fd390f6a 895 void (*enqueue_task) (struct rq *rq, struct task_struct *p, int wakeup);
f02231e5 896 void (*dequeue_task) (struct rq *rq, struct task_struct *p, int sleep);
4530d7ab 897 void (*yield_task) (struct rq *rq);
e7693a36 898 int (*select_task_rq)(struct task_struct *p, int sync);
20b8a59f
IM		 899
900 void (*check_preempt_curr) (struct rq *rq, struct task_struct *p);
901
fb8d4724 902 struct task_struct * (*pick_next_task) (struct rq *rq);
31ee529c 903 void (*put_prev_task) (struct rq *rq, struct task_struct *p);
20b8a59f 904
681f3e68 905#ifdef CONFIG_SMP
43010659 906 unsigned long (*load_balance) (struct rq *this_rq, int this_cpu,
e1d1484f 907 struct rq *busiest, unsigned long max_load_move,
20b8a59f 908 struct sched_domain *sd, enum cpu_idle_type idle,
a4ac01c3 909 int *all_pinned, int *this_best_prio);
20b8a59f 910
e1d1484f
PW		 911 int (*move_one_task) (struct rq *this_rq, int this_cpu,
912 struct rq *busiest, struct sched_domain *sd,
913 enum cpu_idle_type idle);
9a897c5a
SR		 914 void (*pre_schedule) (struct rq *this_rq, struct task_struct *task);
915 void (*post_schedule) (struct rq *this_rq);
916 void (*task_wake_up) (struct rq *this_rq, struct task_struct *task);
681f3e68 917#endif
e1d1484f 918
83b699ed 919 void (*set_curr_task) (struct rq *rq);
8f4d37ec 920 void (*task_tick) (struct rq *rq, struct task_struct *p, int queued);
ee0827d8 921 void (*task_new) (struct rq *rq, struct task_struct *p);
cd8ba7cd
MT		 922 void (*set_cpus_allowed)(struct task_struct *p,
923 const cpumask_t *newmask);
57d885fe 924
1f11eb6a
GH		 925 void (*rq_online)(struct rq *rq);
926 void (*rq_offline)(struct rq *rq);
cb469845
SR		 927
928 void (*switched_from) (struct rq *this_rq, struct task_struct *task,
929 int running);
930 void (*switched_to) (struct rq *this_rq, struct task_struct *task,
931 int running);
932 void (*prio_changed) (struct rq *this_rq, struct task_struct *task,
933 int oldprio, int running);
810b3817
PZ		 934
935#ifdef CONFIG_FAIR_GROUP_SCHED
936 void (*moved_group) (struct task_struct *p);
937#endif
20b8a59f
IM		 938};
939
940struct load_weight {
941 unsigned long weight, inv_weight;
942};
943
944/*
945 * CFS stats for a schedulable entity (task, task-group etc)
946 *
947 * Current field usage histogram:
948 *
949 * 4 se->block_start
950 * 4 se->run_node
951 * 4 se->sleep_start
20b8a59f 952 * 6 se->load.weight
20b8a59f
IM		 953 */
954struct sched_entity {
20b8a59f
IM		 955 struct load_weight load; /* for load-balancing */
956 struct rb_node run_node;
4a55bd5e 957 struct list_head group_node;
20b8a59f
IM		 958 unsigned int on_rq;
959
94c18227
IM		 960 u64 exec_start;
961 u64 sum_exec_runtime;
e9acbff6 962 u64 vruntime;
f6cf891c 963 u64 prev_sum_exec_runtime;
94c18227 964
4ae7d5ce
IM		 965 u64 last_wakeup;
966 u64 avg_overlap;
967
94c18227 968#ifdef CONFIG_SCHEDSTATS
20b8a59f 969 u64 wait_start;
94c18227 970 u64 wait_max;
6d082592
AV		 971 u64 wait_count;
972 u64 wait_sum;
94c18227 973
20b8a59f 974 u64 sleep_start;
20b8a59f 975 u64 sleep_max;
94c18227
IM		 976 s64 sum_sleep_runtime;
977
978 u64 block_start;
20b8a59f
IM		 979 u64 block_max;
980 u64 exec_max;
eba1ed4b 981 u64 slice_max;
cc367732
IM		 982
983 u64 nr_migrations;
984 u64 nr_migrations_cold;
985 u64 nr_failed_migrations_affine;
986 u64 nr_failed_migrations_running;
987 u64 nr_failed_migrations_hot;
988 u64 nr_forced_migrations;
989 u64 nr_forced2_migrations;
990
991 u64 nr_wakeups;
992 u64 nr_wakeups_sync;
993 u64 nr_wakeups_migrate;
994 u64 nr_wakeups_local;
995 u64 nr_wakeups_remote;
996 u64 nr_wakeups_affine;
997 u64 nr_wakeups_affine_attempts;
998 u64 nr_wakeups_passive;
999 u64 nr_wakeups_idle;
94c18227
IM		 1000#endif
1001
20b8a59f
IM		 1002#ifdef CONFIG_FAIR_GROUP_SCHED
1003 struct sched_entity *parent;
1004 /* rq on which this entity is (to be) queued: */
1005 struct cfs_rq *cfs_rq;
1006 /* rq "owned" by this entity/group: */
1007 struct cfs_rq *my_q;
1008#endif
1009};
70b97a7f 1010
fa717060
PZ		 1011struct sched_rt_entity {
1012 struct list_head run_list;
1013 unsigned int time_slice;
78f2c7db 1014 unsigned long timeout;
6f505b16
PZ		 1015 int nr_cpus_allowed;
1016
58d6c2d7 1017 struct sched_rt_entity *back;
052f1dc7 1018#ifdef CONFIG_RT_GROUP_SCHED
6f505b16
PZ		 1019 struct sched_rt_entity *parent;
1020 /* rq on which this entity is (to be) queued: */
1021 struct rt_rq *rt_rq;
1022 /* rq "owned" by this entity/group: */
1023 struct rt_rq *my_q;
1024#endif
fa717060
PZ		 1025};
1026
1da177e4
LT		 1027struct task_struct {
1028 volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */
f7e4217b 1029 void *stack;
1da177e4 1030 atomic_t usage;
97dc32cd
WC		 1031 unsigned int flags; /* per process flags, defined below */
1032 unsigned int ptrace;
1da177e4 1033
36772092 1034 int lock_depth; /* BKL lock depth */
1da177e4 1035
2dd73a4f
PW		 1036#ifdef CONFIG_SMP
1037#ifdef __ARCH_WANT_UNLOCKED_CTXSW
4866cde0
NP		 1038 int oncpu;
1039#endif
2dd73a4f 1040#endif
50e645a8 1041
b29739f9 1042 int prio, static_prio, normal_prio;
c7aceaba 1043 unsigned int rt_priority;
5522d5d5 1044 const struct sched_class *sched_class;
20b8a59f 1045 struct sched_entity se;
fa717060 1046 struct sched_rt_entity rt;
1da177e4 1047
e107be36
AK		 1048#ifdef CONFIG_PREEMPT_NOTIFIERS
1049 /* list of struct preempt_notifier: */
1050 struct hlist_head preempt_notifiers;
1051#endif
1052
18796aa0
AD		 1053 /*
1054 * fpu_counter contains the number of consecutive context switches
1055 * that the FPU is used. If this is over a threshold, the lazy fpu
1056 * saving becomes unlazy to save the trap. This is an unsigned char
1057 * so that after 256 times the counter wraps and the behavior turns
1058 * lazy again; this to deal with bursty apps that only use FPU for
1059 * a short time
1060 */
1061 unsigned char fpu_counter;
1062 s8 oomkilladj; /* OOM kill score adjustment (bit shift). */
6c5c9341 1063#ifdef CONFIG_BLK_DEV_IO_TRACE
2056a782 1064 unsigned int btrace_seq;
6c5c9341 1065#endif
1da177e4 1066
97dc32cd 1067 unsigned int policy;
1da177e4 1068 cpumask_t cpus_allowed;
1da177e4 1069
e260be67
PM		 1070#ifdef CONFIG_PREEMPT_RCU
1071 int rcu_read_lock_nesting;
1072 int rcu_flipctr_idx;
1073#endif /* #ifdef CONFIG_PREEMPT_RCU */
1074
52f17b6c 1075#if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)
1da177e4
LT		 1076 struct sched_info sched_info;
1077#endif
1078
1079 struct list_head tasks;
1da177e4
LT		 1080
1081 struct mm_struct *mm, *active_mm;
1082
1083/* task state */
1084 struct linux_binfmt *binfmt;
97dc32cd 1085 int exit_state;
1da177e4
LT		 1086 int exit_code, exit_signal;
1087 int pdeath_signal; /* The signal sent when the parent dies */
1088 /* ??? */
97dc32cd 1089 unsigned int personality;
1da177e4
LT		 1090 unsigned did_exec:1;
1091 pid_t pid;
1092 pid_t tgid;
0a425405
AV		 1093
1094#ifdef CONFIG_CC_STACKPROTECTOR
1095 /* Canary value for the -fstack-protector gcc feature */
1096 unsigned long stack_canary;
1097#endif
1da177e4
LT		 1098 /*
1099 * pointers to (original) parent process, youngest child, younger sibling,
1100 * older sibling, respectively. (p->father can be replaced with
f470021a 1101 * p->real_parent->pid)
1da177e4 1102 */
f470021a
RM		 1103 struct task_struct *real_parent; /* real parent process */
1104 struct task_struct *parent; /* recipient of SIGCHLD, wait4() reports */
1da177e4 1105 /*
f470021a 1106 * children/sibling forms the list of my natural children
1da177e4
LT		 1107 */
1108 struct list_head children; /* list of my children */
1109 struct list_head sibling; /* linkage in my parent's children list */
1110 struct task_struct *group_leader; /* threadgroup leader */
1111
f470021a
RM		 1112 /*
1113 * ptraced is the list of tasks this task is using ptrace on.
1114 * This includes both natural children and PTRACE_ATTACH targets.
1115 * p->ptrace_entry is p's link on the p->parent->ptraced list.
1116 */
1117 struct list_head ptraced;
1118 struct list_head ptrace_entry;
1119
1da177e4 1120 /* PID/PID hash table linkage. */
92476d7f 1121 struct pid_link pids[PIDTYPE_MAX];
47e65328 1122 struct list_head thread_group;
1da177e4
LT		 1123
1124 struct completion *vfork_done; /* for vfork() */
1125 int __user *set_child_tid; /* CLONE_CHILD_SETTID */
1126 int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */
1127
c66f08be 1128 cputime_t utime, stime, utimescaled, stimescaled;
9ac52315 1129 cputime_t gtime;
9301899b 1130 cputime_t prev_utime, prev_stime;
1da177e4 1131 unsigned long nvcsw, nivcsw; /* context switch counts */
924b42d5
TJ		 1132 struct timespec start_time; /* monotonic time */
1133 struct timespec real_start_time; /* boot based time */
1da177e4
LT		 1134/* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */
1135 unsigned long min_flt, maj_flt;
1136
1137 cputime_t it_prof_expires, it_virt_expires;
1138 unsigned long long it_sched_expires;
1139 struct list_head cpu_timers[3];
1140
1141/* process credentials */
1142 uid_t uid,euid,suid,fsuid;
1143 gid_t gid,egid,sgid,fsgid;
1144 struct group_info *group_info;
3b7391de 1145 kernel_cap_t cap_effective, cap_inheritable, cap_permitted, cap_bset;
1da177e4 1146 struct user_struct *user;
c7aceaba 1147 unsigned securebits;
1da177e4 1148#ifdef CONFIG_KEYS
c7aceaba 1149 unsigned char jit_keyring; /* default keyring to attach requested keys to */
b5f545c8 1150 struct key *request_key_auth; /* assumed request_key authority */
1da177e4
LT		 1151 struct key *thread_keyring; /* keyring private to this thread */
1152#endif
36772092
PBG		 1153 char comm[TASK_COMM_LEN]; /* executable name excluding path
1154 - access with [gs]et_task_comm (which lock
1155 it with task_lock())
1156 - initialized normally by flush_old_exec */
1da177e4
LT		 1157/* file system info */
1158 int link_count, total_link_count;
3d5b6fcc 1159#ifdef CONFIG_SYSVIPC
1da177e4
LT		 1160/* ipc stuff */
1161 struct sysv_sem sysvsem;
3d5b6fcc 1162#endif
82a1fcb9
IM		 1163#ifdef CONFIG_DETECT_SOFTLOCKUP
1164/* hung task detection */
1165 unsigned long last_switch_timestamp;
1166 unsigned long last_switch_count;
1167#endif
1da177e4
LT		 1168/* CPU-specific state of this task */
1169 struct thread_struct thread;
1170/* filesystem information */
1171 struct fs_struct *fs;
1172/* open file information */
1173 struct files_struct *files;
1651e14e 1174/* namespaces */
ab516013 1175 struct nsproxy *nsproxy;
1da177e4
LT		 1176/* signal handlers */
1177 struct signal_struct *signal;
1178 struct sighand_struct *sighand;
1179
1180 sigset_t blocked, real_blocked;
f3de272b 1181 sigset_t saved_sigmask; /* restored if set_restore_sigmask() was used */
1da177e4
LT		 1182 struct sigpending pending;
1183
1184 unsigned long sas_ss_sp;
1185 size_t sas_ss_size;
1186 int (*notifier)(void *priv);
1187 void *notifier_data;
1188 sigset_t *notifier_mask;
57c521ce 1189#ifdef CONFIG_SECURITY
1da177e4 1190 void *security;
57c521ce 1191#endif
1da177e4 1192 struct audit_context *audit_context;
bfef93a5
AV		 1193#ifdef CONFIG_AUDITSYSCALL
1194 uid_t loginuid;
4746ec5b 1195 unsigned int sessionid;
bfef93a5 1196#endif
1da177e4
LT		 1197 seccomp_t seccomp;
1198
1199/* Thread group tracking */
1200 u32 parent_exec_id;
1201 u32 self_exec_id;
1202/* Protection of (de-)allocation: mm, files, fs, tty, keyrings */
1203 spinlock_t alloc_lock;
1da177e4 1204
b29739f9
IM		 1205 /* Protection of the PI data structures: */
1206 spinlock_t pi_lock;
1207
23f78d4a
IM		 1208#ifdef CONFIG_RT_MUTEXES
1209 /* PI waiters blocked on a rt_mutex held by this task */
1210 struct plist_head pi_waiters;
1211 /* Deadlock detection and priority inheritance handling */
1212 struct rt_mutex_waiter *pi_blocked_on;
23f78d4a
IM		 1213#endif
1214
408894ee
IM		 1215#ifdef CONFIG_DEBUG_MUTEXES
1216 /* mutex deadlock detection */
1217 struct mutex_waiter *blocked_on;
1218#endif
de30a2b3
IM		 1219#ifdef CONFIG_TRACE_IRQFLAGS
1220 unsigned int irq_events;
1221 int hardirqs_enabled;
1222 unsigned long hardirq_enable_ip;
1223 unsigned int hardirq_enable_event;
1224 unsigned long hardirq_disable_ip;
1225 unsigned int hardirq_disable_event;
1226 int softirqs_enabled;
1227 unsigned long softirq_disable_ip;
1228 unsigned int softirq_disable_event;
1229 unsigned long softirq_enable_ip;
1230 unsigned int softirq_enable_event;
1231 int hardirq_context;
1232 int softirq_context;
1233#endif
fbb9ce95 1234#ifdef CONFIG_LOCKDEP
bdb9441e 1235# define MAX_LOCK_DEPTH 48UL
fbb9ce95
IM		 1236 u64 curr_chain_key;
1237 int lockdep_depth;
fbb9ce95 1238 unsigned int lockdep_recursion;
c7aceaba 1239 struct held_lock held_locks[MAX_LOCK_DEPTH];
fbb9ce95 1240#endif
408894ee 1241
1da177e4
LT		 1242/* journalling filesystem info */
1243 void *journal_info;
1244
d89d8796
NB		 1245/* stacked block device info */
1246 struct bio *bio_list, **bio_tail;
1247
1da177e4
LT		 1248/* VM state */
1249 struct reclaim_state *reclaim_state;
1250
1da177e4
LT		 1251 struct backing_dev_info *backing_dev_info;
1252
1253 struct io_context *io_context;
1254
1255 unsigned long ptrace_message;
1256 siginfo_t *last_siginfo; /* For ptrace use. */
940389b8 1257 struct task_io_accounting ioac;
8f0ab514 1258#if defined(CONFIG_TASK_XACCT)
1da177e4
LT		 1259 u64 acct_rss_mem1; /* accumulated rss usage */
1260 u64 acct_vm_mem1; /* accumulated virtual memory usage */
49b5cf34 1261 cputime_t acct_timexpd; /* stime + utime since last update */
1da177e4 1262#endif
1da177e4 1263#ifdef CONFIG_CPUSETS
1da177e4
LT		 1264 nodemask_t mems_allowed;
1265 int cpuset_mems_generation;
825a46af 1266 int cpuset_mem_spread_rotor;
1da177e4 1267#endif
ddbcc7e8 1268#ifdef CONFIG_CGROUPS
817929ec
PM		 1269 /* Control Group info protected by css_set_lock */
1270 struct css_set *cgroups;
1271 /* cg_list protected by css_set_lock and tsk->alloc_lock */
1272 struct list_head cg_list;
ddbcc7e8 1273#endif
42b2dd0a 1274#ifdef CONFIG_FUTEX
0771dfef 1275 struct robust_list_head __user *robust_list;
34f192c6
IM		 1276#ifdef CONFIG_COMPAT
1277 struct compat_robust_list_head __user *compat_robust_list;
1278#endif
c87e2837
IM		 1279 struct list_head pi_state_list;
1280 struct futex_pi_state *pi_state_cache;
c7aceaba
RK		 1281#endif
1282#ifdef CONFIG_NUMA
1283 struct mempolicy *mempolicy;
1284 short il_next;
42b2dd0a 1285#endif
22e2c507 1286 atomic_t fs_excl; /* holding fs exclusive resources */
e56d0903 1287 struct rcu_head rcu;
b92ce558
JA		 1288
1289 /*
1290 * cache last used pipe for splice
1291 */
1292 struct pipe_inode_info *splice_pipe;
ca74e92b
SN		 1293#ifdef CONFIG_TASK_DELAY_ACCT
1294 struct task_delay_info *delays;
f4f154fd
AM		 1295#endif
1296#ifdef CONFIG_FAULT_INJECTION
1297 int make_it_fail;
ca74e92b 1298#endif
3e26c149 1299 struct prop_local_single dirties;
9745512c
AV		 1300#ifdef CONFIG_LATENCYTOP
1301 int latency_record_count;
1302 struct latency_record latency_record[LT_SAVECOUNT];
1303#endif
1da177e4
LT		 1304};
1305
e05606d3
IM		 1306/*
1307 * Priority of a process goes from 0..MAX_PRIO-1, valid RT
1308 * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
1309 * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority
1310 * values are inverted: lower p->prio value means higher priority.
1311 *
1312 * The MAX_USER_RT_PRIO value allows the actual maximum
1313 * RT priority to be separate from the value exported to
1314 * user-space. This allows kernel threads to set their
1315 * priority to a value higher than any user task. Note:
1316 * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.
1317 */
1318
1319#define MAX_USER_RT_PRIO 100
1320#define MAX_RT_PRIO MAX_USER_RT_PRIO
1321
1322#define MAX_PRIO (MAX_RT_PRIO + 40)
1323#define DEFAULT_PRIO (MAX_RT_PRIO + 20)
1324
1325static inline int rt_prio(int prio)
1326{
1327 if (unlikely(prio < MAX_RT_PRIO))
1328 return 1;
1329 return 0;
1330}
1331
e868171a 1332static inline int rt_task(struct task_struct *p)
e05606d3
IM		 1333{
1334 return rt_prio(p->prio);
1335}
1336
a47afb0f 1337static inline void set_task_session(struct task_struct *tsk, pid_t session)
937949d9 1338{
a47afb0f 1339 tsk->signal->__session = session;
937949d9
CLG		 1340}
1341
9a2e7057
PE		 1342static inline void set_task_pgrp(struct task_struct *tsk, pid_t pgrp)
1343{
1344 tsk->signal->__pgrp = pgrp;
1345}
1346
e868171a 1347static inline struct pid *task_pid(struct task_struct *task)
22c935f4
EB		 1348{
1349 return task->pids[PIDTYPE_PID].pid;
1350}
1351
e868171a 1352static inline struct pid *task_tgid(struct task_struct *task)
22c935f4
EB		 1353{
1354 return task->group_leader->pids[PIDTYPE_PID].pid;
1355}
1356
e868171a 1357static inline struct pid *task_pgrp(struct task_struct *task)
22c935f4
EB		 1358{
1359 return task->group_leader->pids[PIDTYPE_PGID].pid;
1360}
1361
e868171a 1362static inline struct pid *task_session(struct task_struct *task)
22c935f4
EB		 1363{
1364 return task->group_leader->pids[PIDTYPE_SID].pid;
1365}
1366
7af57294
PE		 1367struct pid_namespace;
1368
1369/*
1370 * the helpers to get the task's different pids as they are seen
1371 * from various namespaces
1372 *
1373 * task_xid_nr() : global id, i.e. the id seen from the init namespace;
44c4e1b2
EB		 1374 * task_xid_vnr() : virtual id, i.e. the id seen from the pid namespace of
1375 * current.
7af57294
PE		 1376 * task_xid_nr_ns() : id seen from the ns specified;
1377 *
1378 * set_task_vxid() : assigns a virtual id to a task;
1379 *
7af57294
PE		 1380 * see also pid_nr() etc in include/linux/pid.h
1381 */
1382
e868171a 1383static inline pid_t task_pid_nr(struct task_struct *tsk)
7af57294
PE		 1384{
1385 return tsk->pid;
1386}
1387
2f2a3a46 1388pid_t task_pid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
7af57294
PE		 1389
1390static inline pid_t task_pid_vnr(struct task_struct *tsk)
1391{
1392 return pid_vnr(task_pid(tsk));
1393}
1394
1395
e868171a 1396static inline pid_t task_tgid_nr(struct task_struct *tsk)
7af57294
PE		 1397{
1398 return tsk->tgid;
1399}
1400
2f2a3a46 1401pid_t task_tgid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
7af57294
PE		 1402
1403static inline pid_t task_tgid_vnr(struct task_struct *tsk)
1404{
1405 return pid_vnr(task_tgid(tsk));
1406}
1407
1408
e868171a 1409static inline pid_t task_pgrp_nr(struct task_struct *tsk)
7af57294 1410{
9a2e7057 1411 return tsk->signal->__pgrp;
7af57294
PE		 1412}
1413
2f2a3a46 1414pid_t task_pgrp_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
7af57294
PE		 1415
1416static inline pid_t task_pgrp_vnr(struct task_struct *tsk)
1417{
1418 return pid_vnr(task_pgrp(tsk));
1419}
1420
1421
e868171a 1422static inline pid_t task_session_nr(struct task_struct *tsk)
7af57294
PE		 1423{
1424 return tsk->signal->__session;
1425}
1426
2f2a3a46 1427pid_t task_session_nr_ns(struct task_struct *tsk, struct pid_namespace *ns);
7af57294
PE		 1428
1429static inline pid_t task_session_vnr(struct task_struct *tsk)
1430{
1431 return pid_vnr(task_session(tsk));
1432}
1433
1434
1da177e4
LT		 1435/**
1436 * pid_alive - check that a task structure is not stale
1437 * @p: Task structure to be checked.
1438 *
1439 * Test if a process is not yet dead (at most zombie state)
1440 * If pid_alive fails, then pointers within the task structure
1441 * can be stale and must not be dereferenced.
1442 */
e868171a 1443static inline int pid_alive(struct task_struct *p)
1da177e4 1444{
92476d7f 1445 return p->pids[PIDTYPE_PID].pid != NULL;
1da177e4
LT		 1446}
1447
f400e198 1448/**
b460cbc5 1449 * is_global_init - check if a task structure is init
3260259f
HK		 1450 * @tsk: Task structure to be checked.
1451 *
1452 * Check if a task structure is the first user space task the kernel created.
b460cbc5 1453 */
e868171a 1454static inline int is_global_init(struct task_struct *tsk)
b461cc03
PE		 1455{
1456 return tsk->pid == 1;
1457}
b460cbc5
SH		 1458
1459/*
1460 * is_container_init:
1461 * check whether in the task is init in its own pid namespace.
f400e198 1462 */
b461cc03 1463extern int is_container_init(struct task_struct *tsk);
f400e198 1464
9ec52099
CLG		 1465extern struct pid *cad_pid;
1466
1da177e4 1467extern void free_task(struct task_struct *tsk);
1da177e4 1468#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
e56d0903 1469
158d9ebd 1470extern void __put_task_struct(struct task_struct *t);
e56d0903
IM		 1471
1472static inline void put_task_struct(struct task_struct *t)
1473{
1474 if (atomic_dec_and_test(&t->usage))
8c7904a0 1475 __put_task_struct(t);
e56d0903 1476}
1da177e4
LT		 1477
1478/*
1479 * Per process flags
1480 */
1481#define PF_ALIGNWARN 0x00000001 /* Print alignment warning msgs */
1482 /* Not implemented yet, only for 486*/
1483#define PF_STARTING 0x00000002 /* being created */
1484#define PF_EXITING 0x00000004 /* getting shut down */
778e9a9c 1485#define PF_EXITPIDONE 0x00000008 /* pi exit done on shut down */
94886b84 1486#define PF_VCPU 0x00000010 /* I'm a virtual CPU */
1da177e4
LT		 1487#define PF_FORKNOEXEC 0x00000040 /* forked but didn't exec */
1488#define PF_SUPERPRIV 0x00000100 /* used super-user privileges */
1489#define PF_DUMPCORE 0x00000200 /* dumped core */
1490#define PF_SIGNALED 0x00000400 /* killed by a signal */
1491#define PF_MEMALLOC 0x00000800 /* Allocating memory */
1492#define PF_FLUSHER 0x00001000 /* responsible for disk writeback */
1493#define PF_USED_MATH 0x00002000 /* if unset the fpu must be initialized before use */
1da177e4
LT		 1494#define PF_NOFREEZE 0x00008000 /* this thread should not be frozen */
1495#define PF_FROZEN 0x00010000 /* frozen for system suspend */
1496#define PF_FSTRANS 0x00020000 /* inside a filesystem transaction */
1497#define PF_KSWAPD 0x00040000 /* I am kswapd */
1498#define PF_SWAPOFF 0x00080000 /* I am in swapoff */
1499#define PF_LESS_THROTTLE 0x00100000 /* Throttle me less: I clean memory */
246bb0b1 1500#define PF_KTHREAD 0x00200000 /* I am a kernel thread */
b31dc66a
JA		 1501#define PF_RANDOMIZE 0x00400000 /* randomize virtual address space */
1502#define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */
1503#define PF_SPREAD_PAGE 0x01000000 /* Spread page cache over cpuset */
1504#define PF_SPREAD_SLAB 0x02000000 /* Spread some slab caches over cpuset */
9985b0ba 1505#define PF_THREAD_BOUND 0x04000000 /* Thread bound to specific cpu */
c61afb18 1506#define PF_MEMPOLICY 0x10000000 /* Non-default NUMA mempolicy */
61a87122 1507#define PF_MUTEX_TESTER 0x20000000 /* Thread belongs to the rt mutex tester */
ba96a0c8 1508#define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezeable */
ebb12db5 1509#define PF_FREEZER_NOSIG 0x80000000 /* Freezer won't send signals to it */
1da177e4
LT		 1510
1511/*
1512 * Only the _current_ task can read/write to tsk->flags, but other
1513 * tasks can access tsk->flags in readonly mode for example
1514 * with tsk_used_math (like during threaded core dumping).
1515 * There is however an exception to this rule during ptrace
1516 * or during fork: the ptracer task is allowed to write to the
1517 * child->flags of its traced child (same goes for fork, the parent
1518 * can write to the child->flags), because we're guaranteed the
1519 * child is not running and in turn not changing child->flags
1520 * at the same time the parent does it.
1521 */
1522#define clear_stopped_child_used_math(child) do { (child)->flags &= ~PF_USED_MATH; } while (0)
1523#define set_stopped_child_used_math(child) do { (child)->flags |= PF_USED_MATH; } while (0)
1524#define clear_used_math() clear_stopped_child_used_math(current)
1525#define set_used_math() set_stopped_child_used_math(current)
1526#define conditional_stopped_child_used_math(condition, child) \
1527 do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= (condition) ? PF_USED_MATH : 0; } while (0)
1528#define conditional_used_math(condition) \
1529 conditional_stopped_child_used_math(condition, current)
1530#define copy_to_stopped_child_used_math(child) \
1531 do { (child)->flags &= ~PF_USED_MATH, (child)->flags |= current->flags & PF_USED_MATH; } while (0)
1532/* NOTE: this will return 0 or PF_USED_MATH, it will never return 1 */
1533#define tsk_used_math(p) ((p)->flags & PF_USED_MATH)
1534#define used_math() tsk_used_math(current)
1535
1536#ifdef CONFIG_SMP
cd8ba7cd
MT		 1537extern int set_cpus_allowed_ptr(struct task_struct *p,
1538 const cpumask_t *new_mask);
1da177e4 1539#else
cd8ba7cd
MT		 1540static inline int set_cpus_allowed_ptr(struct task_struct *p,
1541 const cpumask_t *new_mask)
1da177e4 1542{
cd8ba7cd 1543 if (!cpu_isset(0, *new_mask))
1da177e4
LT		 1544 return -EINVAL;
1545 return 0;
1546}
1547#endif
cd8ba7cd
MT		 1548static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
1549{
1550 return set_cpus_allowed_ptr(p, &new_mask);
1551}
1da177e4
LT		 1552
1553extern unsigned long long sched_clock(void);
e436d800 1554
c1955a3d
PZ		 1555extern void sched_clock_init(void);
1556extern u64 sched_clock_cpu(int cpu);
3e51f33f 1557
c1955a3d 1558#ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
3e51f33f
PZ		 1559static inline void sched_clock_tick(void)
1560{
1561}
1562
1563static inline void sched_clock_idle_sleep_event(void)
1564{
1565}
1566
1567static inline void sched_clock_idle_wakeup_event(u64 delta_ns)
1568{
1569}
e4e4e534 1570#else
3e51f33f
PZ		 1571extern void sched_clock_tick(void);
1572extern void sched_clock_idle_sleep_event(void);
1573extern void sched_clock_idle_wakeup_event(u64 delta_ns);
1574#endif
1575
e436d800
IM		 1576/*
1577 * For kernel-internal use: high-speed (but slightly incorrect) per-cpu
1578 * clock constructed from sched_clock():
1579 */
1580extern unsigned long long cpu_clock(int cpu);
1581
36c8b586 1582extern unsigned long long
41b86e9c 1583task_sched_runtime(struct task_struct *task);
1da177e4
LT		 1584
1585/* sched_exec is called by processes performing an exec */
1586#ifdef CONFIG_SMP
1587extern void sched_exec(void);
1588#else
1589#define sched_exec() {}
1590#endif
1591
2aa44d05
IM		 1592extern void sched_clock_idle_sleep_event(void);
1593extern void sched_clock_idle_wakeup_event(u64 delta_ns);
bb29ab26 1594
1da177e4
LT		 1595#ifdef CONFIG_HOTPLUG_CPU
1596extern void idle_task_exit(void);
1597#else
1598static inline void idle_task_exit(void) {}
1599#endif
1600
1601extern void sched_idle_next(void);
b29739f9 1602
06d8308c
TG		 1603#if defined(CONFIG_NO_HZ) && defined(CONFIG_SMP)
1604extern void wake_up_idle_cpu(int cpu);
1605#else
1606static inline void wake_up_idle_cpu(int cpu) { }
1607#endif
1608
2bd8e6d4 1609#ifdef CONFIG_SCHED_DEBUG
21805085 1610extern unsigned int sysctl_sched_latency;
b2be5e96 1611extern unsigned int sysctl_sched_min_granularity;
bf0f6f24 1612extern unsigned int sysctl_sched_wakeup_granularity;
bf0f6f24
IM		 1613extern unsigned int sysctl_sched_child_runs_first;
1614extern unsigned int sysctl_sched_features;
da84d961 1615extern unsigned int sysctl_sched_migration_cost;
b82d9fdd 1616extern unsigned int sysctl_sched_nr_migrate;
2398f2c6 1617extern unsigned int sysctl_sched_shares_ratelimit;
b2be5e96
PZ		 1618
1619int sched_nr_latency_handler(struct ctl_table *table, int write,
1620 struct file *file, void __user *buffer, size_t *length,
1621 loff_t *ppos);
2bd8e6d4 1622#endif
9f0c1e56
PZ		 1623extern unsigned int sysctl_sched_rt_period;
1624extern int sysctl_sched_rt_runtime;
2bd8e6d4 1625
d0b27fa7
PZ		 1626int sched_rt_handler(struct ctl_table *table, int write,
1627 struct file *filp, void __user *buffer, size_t *lenp,
1628 loff_t *ppos);
1629
2bd8e6d4 1630extern unsigned int sysctl_sched_compat_yield;
bf0f6f24 1631
b29739f9 1632#ifdef CONFIG_RT_MUTEXES
36c8b586
IM		 1633extern int rt_mutex_getprio(struct task_struct *p);
1634extern void rt_mutex_setprio(struct task_struct *p, int prio);
1635extern void rt_mutex_adjust_pi(struct task_struct *p);
b29739f9 1636#else
e868171a 1637static inline int rt_mutex_getprio(struct task_struct *p)
b29739f9
IM		 1638{
1639 return p->normal_prio;
1640}
95e02ca9 1641# define rt_mutex_adjust_pi(p) do { } while (0)
b29739f9
IM		 1642#endif
1643
36c8b586
IM		 1644extern void set_user_nice(struct task_struct *p, long nice);
1645extern int task_prio(const struct task_struct *p);
1646extern int task_nice(const struct task_struct *p);
1647extern int can_nice(const struct task_struct *p, const int nice);
1648extern int task_curr(const struct task_struct *p);
1da177e4
LT		 1649extern int idle_cpu(int cpu);
1650extern int sched_setscheduler(struct task_struct *, int, struct sched_param *);
961ccddd
RR		 1651extern int sched_setscheduler_nocheck(struct task_struct *, int,
1652 struct sched_param *);
36c8b586
IM		 1653extern struct task_struct *idle_task(int cpu);
1654extern struct task_struct *curr_task(int cpu);
1655extern void set_curr_task(int cpu, struct task_struct *p);
1da177e4
LT		 1656
1657void yield(void);
1658
1659/*
1660 * The default (Linux) execution domain.
1661 */
1662extern struct exec_domain default_exec_domain;
1663
1664union thread_union {
1665 struct thread_info thread_info;
1666 unsigned long stack[THREAD_SIZE/sizeof(long)];
1667};
1668
1669#ifndef __HAVE_ARCH_KSTACK_END
1670static inline int kstack_end(void *addr)
1671{
1672 /* Reliable end of stack detection:
1673 * Some APM bios versions misalign the stack
1674 */
1675 return !(((unsigned long)addr+sizeof(void*)-1) & (THREAD_SIZE-sizeof(void*)));
1676}
1677#endif
1678
1679extern union thread_union init_thread_union;
1680extern struct task_struct init_task;
1681
1682extern struct mm_struct init_mm;
1683
198fe21b
PE		 1684extern struct pid_namespace init_pid_ns;
1685
1686/*
1687 * find a task by one of its numerical ids
1688 *
1689 * find_task_by_pid_type_ns():
1690 * it is the most generic call - it finds a task by all id,
1691 * type and namespace specified
1692 * find_task_by_pid_ns():
1693 * finds a task by its pid in the specified namespace
228ebcbe
PE		 1694 * find_task_by_vpid():
1695 * finds a task by its virtual pid
198fe21b 1696 *
e49859e7 1697 * see also find_vpid() etc in include/linux/pid.h
198fe21b
PE		 1698 */
1699
1700extern struct task_struct *find_task_by_pid_type_ns(int type, int pid,
1701 struct pid_namespace *ns);
1702
228ebcbe
PE		 1703extern struct task_struct *find_task_by_vpid(pid_t nr);
1704extern struct task_struct *find_task_by_pid_ns(pid_t nr,
1705 struct pid_namespace *ns);
198fe21b 1706
8520d7c7 1707extern void __set_special_pids(struct pid *pid);
1da177e4
LT		 1708
1709/* per-UID process charging. */
acce292c 1710extern struct user_struct * alloc_uid(struct user_namespace *, uid_t);
1da177e4
LT		 1711static inline struct user_struct *get_uid(struct user_struct *u)
1712{
1713 atomic_inc(&u->__count);
1714 return u;
1715}
1716extern void free_uid(struct user_struct *);
1717extern void switch_uid(struct user_struct *);
28f300d2 1718extern void release_uids(struct user_namespace *ns);
1da177e4
LT		 1719
1720#include <asm/current.h>
1721
3171a030 1722extern void do_timer(unsigned long ticks);
1da177e4 1723
b3c97528
HH		 1724extern int wake_up_state(struct task_struct *tsk, unsigned int state);
1725extern int wake_up_process(struct task_struct *tsk);
1726extern void wake_up_new_task(struct task_struct *tsk,
1727 unsigned long clone_flags);
1da177e4
LT		 1728#ifdef CONFIG_SMP
1729 extern void kick_process(struct task_struct *tsk);
1730#else
1731 static inline void kick_process(struct task_struct *tsk) { }
1732#endif
ad46c2c4
IM		 1733extern void sched_fork(struct task_struct *p, int clone_flags);
1734extern void sched_dead(struct task_struct *p);
1da177e4
LT		 1735
1736extern int in_group_p(gid_t);
1737extern int in_egroup_p(gid_t);
1738
1739extern void proc_caches_init(void);
1740extern void flush_signals(struct task_struct *);
10ab825b 1741extern void ignore_signals(struct task_struct *);
1da177e4
LT		 1742extern void flush_signal_handlers(struct task_struct *, int force_default);
1743extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);
1744
1745static inline int dequeue_signal_lock(struct task_struct *tsk, sigset_t *mask, siginfo_t *info)
1746{
1747 unsigned long flags;
1748 int ret;
1749
1750 spin_lock_irqsave(&tsk->sighand->siglock, flags);
1751 ret = dequeue_signal(tsk, mask, info);
1752 spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
1753
1754 return ret;
1755}
1756
1757extern void block_all_signals(int (*notifier)(void *priv), void *priv,
1758 sigset_t *mask);
1759extern void unblock_all_signals(void);
1760extern void release_task(struct task_struct * p);
1761extern int send_sig_info(int, struct siginfo *, struct task_struct *);
1da177e4
LT		 1762extern int force_sigsegv(int, struct task_struct *);
1763extern int force_sig_info(int, struct siginfo *, struct task_struct *);
c4b92fc1 1764extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);
c4b92fc1 1765extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid);
2425c08b 1766extern int kill_pid_info_as_uid(int, struct siginfo *, struct pid *, uid_t, uid_t, u32);
c4b92fc1
EB		 1767extern int kill_pgrp(struct pid *pid, int sig, int priv);
1768extern int kill_pid(struct pid *pid, int sig, int priv);
c3de4b38 1769extern int kill_proc_info(int, struct siginfo *, pid_t);
2b2a1ff6 1770extern int do_notify_parent(struct task_struct *, int);
1da177e4
LT		 1771extern void force_sig(int, struct task_struct *);
1772extern void force_sig_specific(int, struct task_struct *);
1773extern int send_sig(int, struct task_struct *, int);
1774extern void zap_other_threads(struct task_struct *p);
1da177e4
LT		 1775extern struct sigqueue *sigqueue_alloc(void);
1776extern void sigqueue_free(struct sigqueue *);
ac5c2153 1777extern int send_sigqueue(struct sigqueue *, struct task_struct *, int group);
9ac95f2f 1778extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
1da177e4
LT		 1779extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long);
1780
9ec52099
CLG		 1781static inline int kill_cad_pid(int sig, int priv)
1782{
1783 return kill_pid(cad_pid, sig, priv);
1784}
1785
1da177e4
LT		 1786/* These can be the second arg to send_sig_info/send_group_sig_info. */
1787#define SEND_SIG_NOINFO ((struct siginfo *) 0)
1788#define SEND_SIG_PRIV ((struct siginfo *) 1)
1789#define SEND_SIG_FORCED ((struct siginfo *) 2)
1790
621d3121
ON		 1791static inline int is_si_special(const struct siginfo *info)
1792{
1793 return info <= SEND_SIG_FORCED;
1794}
1795
1da177e4
LT		 1796/* True if we are on the alternate signal stack. */
1797
1798static inline int on_sig_stack(unsigned long sp)
1799{
1800 return (sp - current->sas_ss_sp < current->sas_ss_size);
1801}
1802
1803static inline int sas_ss_flags(unsigned long sp)
1804{
1805 return (current->sas_ss_size == 0 ? SS_DISABLE
1806 : on_sig_stack(sp) ? SS_ONSTACK : 0);
1807}
1808
1da177e4
LT		 1809/*
1810 * Routines for handling mm_structs
1811 */
1812extern struct mm_struct * mm_alloc(void);
1813
1814/* mmdrop drops the mm and the page tables */
b3c97528 1815extern void __mmdrop(struct mm_struct *);
1da177e4
LT		 1816static inline void mmdrop(struct mm_struct * mm)
1817{
6fb43d7b 1818 if (unlikely(atomic_dec_and_test(&mm->mm_count)))
1da177e4
LT		 1819 __mmdrop(mm);
1820}
1821
1822/* mmput gets rid of the mappings and all user-space */
1823extern void mmput(struct mm_struct *);
1824/* Grab a reference to a task's mm, if it is not already going away */
1825extern struct mm_struct *get_task_mm(struct task_struct *task);
1826/* Remove the current tasks stale references to the old mm_struct */
1827extern void mm_release(struct task_struct *, struct mm_struct *);
402b0862
CO		 1828/* Allocate a new mm structure and copy contents from tsk->mm */
1829extern struct mm_struct *dup_mm(struct task_struct *tsk);
1da177e4
LT		 1830
1831extern int copy_thread(int, unsigned long, unsigned long, unsigned long, struct task_struct *, struct pt_regs *);
1832extern void flush_thread(void);
1833extern void exit_thread(void);
1834
1da177e4 1835extern void exit_files(struct task_struct *);
6b3934ef 1836extern void __cleanup_signal(struct signal_struct *);
a7e5328a 1837extern void __cleanup_sighand(struct sighand_struct *);
cbaffba1 1838
1da177e4 1839extern void exit_itimers(struct signal_struct *);
cbaffba1 1840extern void flush_itimer_signals(void);
1da177e4
LT		 1841
1842extern NORET_TYPE void do_group_exit(int);
1843
1da177e4
LT		 1844extern void daemonize(const char *, ...);
1845extern int allow_signal(int);
1846extern int disallow_signal(int);
1da177e4
LT		 1847
1848extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *);
1849extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);
36c8b586 1850struct task_struct *fork_idle(int);
1da177e4
LT		 1851
1852extern void set_task_comm(struct task_struct *tsk, char *from);
59714d65 1853extern char *get_task_comm(char *to, struct task_struct *tsk);
1da177e4
LT		 1854
1855#ifdef CONFIG_SMP
85ba2d86 1856extern unsigned long wait_task_inactive(struct task_struct *, long match_state);
1da177e4 1857#else
85ba2d86
RM		 1858static inline unsigned long wait_task_inactive(struct task_struct *p,
1859 long match_state)
1860{
1861 return 1;
1862}
1da177e4
LT		 1863#endif
1864
5e85d4ab 1865#define next_task(p) list_entry(rcu_dereference((p)->tasks.next), struct task_struct, tasks)
1da177e4
LT		 1866
1867#define for_each_process(p) \
1868 for (p = &init_task ; (p = next_task(p)) != &init_task ; )
1869
1870/*
1871 * Careful: do_each_thread/while_each_thread is a double loop so
1872 * 'break' will not work as expected - use goto instead.
1873 */
1874#define do_each_thread(g, t) \
1875 for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do
1876
1877#define while_each_thread(g, t) \
1878 while ((t = next_thread(t)) != g)
1879
de12a787
EB		 1880/* de_thread depends on thread_group_leader not being a pid based check */
1881#define thread_group_leader(p) (p == p->group_leader)
1da177e4 1882
0804ef4b
EB		 1883/* Do to the insanities of de_thread it is possible for a process
1884 * to have the pid of the thread group leader without actually being
1885 * the thread group leader. For iteration through the pids in proc
1886 * all we care about is that we have a task with the appropriate
1887 * pid, we don't actually care if we have the right task.
1888 */
e868171a 1889static inline int has_group_leader_pid(struct task_struct *p)
0804ef4b
EB		 1890{
1891 return p->pid == p->tgid;
1892}
1893
bac0abd6
PE		 1894static inline
1895int same_thread_group(struct task_struct *p1, struct task_struct *p2)
1896{
1897 return p1->tgid == p2->tgid;
1898}
1899
36c8b586 1900static inline struct task_struct *next_thread(const struct task_struct *p)
47e65328
ON		 1901{
1902 return list_entry(rcu_dereference(p->thread_group.next),
36c8b586 1903 struct task_struct, thread_group);
47e65328
ON		 1904}
1905
e868171a 1906static inline int thread_group_empty(struct task_struct *p)
1da177e4 1907{
47e65328 1908 return list_empty(&p->thread_group);
1da177e4
LT		 1909}
1910
1911#define delay_group_leader(p) \
1912 (thread_group_leader(p) && !thread_group_empty(p))
1913
1da177e4 1914/*
260ea101 1915 * Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring
22e2c507 1916 * subscriptions and synchronises with wait4(). Also used in procfs. Also
ddbcc7e8
PM		 1917 * pins the final release of task.io_context. Also protects ->cpuset and
1918 * ->cgroup.subsys[].
1da177e4
LT		 1919 *
1920 * Nests both inside and outside of read_lock(&tasklist_lock).
1921 * It must not be nested with write_lock_irq(&tasklist_lock),
1922 * neither inside nor outside.
1923 */
1924static inline void task_lock(struct task_struct *p)
1925{
1926 spin_lock(&p->alloc_lock);
1927}
1928
1929static inline void task_unlock(struct task_struct *p)
1930{
1931 spin_unlock(&p->alloc_lock);
1932}
1933
f63ee72e
ON		 1934extern struct sighand_struct *lock_task_sighand(struct task_struct *tsk,
1935 unsigned long *flags);
1936
1937static inline void unlock_task_sighand(struct task_struct *tsk,
1938 unsigned long *flags)
1939{
1940 spin_unlock_irqrestore(&tsk->sighand->siglock, *flags);
1941}
1942
f037360f
AV		 1943#ifndef __HAVE_THREAD_FUNCTIONS
1944
f7e4217b
RZ		 1945#define task_thread_info(task) ((struct thread_info *)(task)->stack)
1946#define task_stack_page(task) ((task)->stack)
a1261f54 1947
10ebffde
AV		 1948static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org)
1949{
1950 *task_thread_info(p) = *task_thread_info(org);
1951 task_thread_info(p)->task = p;
1952}
1953
1954static inline unsigned long *end_of_stack(struct task_struct *p)
1955{
f7e4217b 1956 return (unsigned long *)(task_thread_info(p) + 1);
10ebffde
AV		 1957}
1958
f037360f
AV		 1959#endif
1960
8b05c7e6
FT		 1961static inline int object_is_on_stack(void *obj)
1962{
1963 void *stack = task_stack_page(current);
1964
1965 return (obj >= stack) && (obj < (stack + THREAD_SIZE));
1966}
1967
8c9843e5
BH		 1968extern void thread_info_cache_init(void);
1969
1da177e4
LT		 1970/* set thread flags in other task's structures
1971 * - see asm/thread_info.h for TIF_xxxx flags available
1972 */
1973static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag)
1974{
a1261f54 1975 set_ti_thread_flag(task_thread_info(tsk), flag);
1da177e4
LT		 1976}
1977
1978static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag)
1979{
a1261f54 1980 clear_ti_thread_flag(task_thread_info(tsk), flag);
1da177e4
LT		 1981}
1982
1983static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag)
1984{
a1261f54 1985 return test_and_set_ti_thread_flag(task_thread_info(tsk), flag);
1da177e4
LT		 1986}
1987
1988static inline int test_and_clear_tsk_thread_flag(struct task_struct *tsk, int flag)
1989{
a1261f54 1990 return test_and_clear_ti_thread_flag(task_thread_info(tsk), flag);
1da177e4
LT		 1991}
1992
1993static inline int test_tsk_thread_flag(struct task_struct *tsk, int flag)
1994{
a1261f54 1995 return test_ti_thread_flag(task_thread_info(tsk), flag);
1da177e4
LT		 1996}
1997
1998static inline void set_tsk_need_resched(struct task_struct *tsk)
1999{
2000 set_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
2001}
2002
2003static inline void clear_tsk_need_resched(struct task_struct *tsk)
2004{
2005 clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
2006}
2007
8ae121ac
GH		 2008static inline int test_tsk_need_resched(struct task_struct *tsk)
2009{
2010 return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED));
2011}
2012
1da177e4
LT		 2013static inline int signal_pending(struct task_struct *p)
2014{
2015 return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));
2016}
f776d12d 2017
b3c97528 2018extern int __fatal_signal_pending(struct task_struct *p);
f776d12d
MW		 2019
2020static inline int fatal_signal_pending(struct task_struct *p)
2021{
2022 return signal_pending(p) && __fatal_signal_pending(p);
2023}
2024
16882c1e
ON		 2025static inline int signal_pending_state(long state, struct task_struct *p)
2026{
2027 if (!(state & (TASK_INTERRUPTIBLE | TASK_WAKEKILL)))
2028 return 0;
2029 if (!signal_pending(p))
2030 return 0;
2031
16882c1e
ON		 2032 return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p);
2033}
2034
1da177e4
LT		 2035static inline int need_resched(void)
2036{
9404ef02 2037 return unlikely(test_thread_flag(TIF_NEED_RESCHED));
1da177e4
LT		 2038}
2039
2040/*
2041 * cond_resched() and cond_resched_lock(): latency reduction via
2042 * explicit rescheduling in places that are safe. The return
2043 * value indicates whether a reschedule was done in fact.
2044 * cond_resched_lock() will drop the spinlock before scheduling,
2045 * cond_resched_softirq() will enable bhs before scheduling.
2046 */
c3921ab7 2047extern int _cond_resched(void);
c714a534 2048#ifdef CONFIG_PREEMPT_BKL
02b67cc3
HX		 2049static inline int cond_resched(void)
2050{
2051 return 0;
2052}
2053#else
02b67cc3
HX		 2054static inline int cond_resched(void)
2055{
2056 return _cond_resched();
2057}
2058#endif
1da177e4
LT		 2059extern int cond_resched_lock(spinlock_t * lock);
2060extern int cond_resched_softirq(void);
c3921ab7
LT		 2061static inline int cond_resched_bkl(void)
2062{
2063 return _cond_resched();
2064}
1da177e4
LT		 2065
2066/*
2067 * Does a critical section need to be broken due to another
95c354fe
NP		 2068 * task waiting?: (technically does not depend on CONFIG_PREEMPT,
2069 * but a general need for low latency)
1da177e4 2070 */
95c354fe 2071static inline int spin_needbreak(spinlock_t *lock)
1da177e4 2072{
95c354fe
NP		 2073#ifdef CONFIG_PREEMPT
2074 return spin_is_contended(lock);
2075#else
1da177e4 2076 return 0;
95c354fe 2077#endif
1da177e4
LT		 2078}
2079
7bb44ade
RM		 2080/*
2081 * Reevaluate whether the task has signals pending delivery.
2082 * Wake the task if so.
2083 * This is required every time the blocked sigset_t changes.
2084 * callers must hold sighand->siglock.
2085 */
2086extern void recalc_sigpending_and_wake(struct task_struct *t);
1da177e4
LT		 2087extern void recalc_sigpending(void);
2088
2089extern void signal_wake_up(struct task_struct *t, int resume_stopped);
2090
2091/*
2092 * Wrappers for p->thread_info->cpu access. No-op on UP.
2093 */
2094#ifdef CONFIG_SMP
2095
2096static inline unsigned int task_cpu(const struct task_struct *p)
2097{
a1261f54 2098 return task_thread_info(p)->cpu;
1da177e4
LT		 2099}
2100
c65cc870 2101extern void set_task_cpu(struct task_struct *p, unsigned int cpu);
1da177e4
LT		 2102
2103#else
2104
2105static inline unsigned int task_cpu(const struct task_struct *p)
2106{
2107 return 0;
2108}
2109
2110static inline void set_task_cpu(struct task_struct *p, unsigned int cpu)
2111{
2112}
2113
2114#endif /* CONFIG_SMP */
2115
1da177e4 2116extern void arch_pick_mmap_layout(struct mm_struct *mm);
1da177e4 2117
1a3c3034
IM		 2118#ifdef CONFIG_TRACING
2119extern void
2120__trace_special(void *__tr, void *__data,
2121 unsigned long arg1, unsigned long arg2, unsigned long arg3);
2122#else
2123static inline void
2124__trace_special(void *__tr, void *__data,
2125 unsigned long arg1, unsigned long arg2, unsigned long arg3)
2126{
2127}
2128#endif
2129
b53e921b 2130extern long sched_setaffinity(pid_t pid, const cpumask_t *new_mask);
1da177e4
LT		 2131extern long sched_getaffinity(pid_t pid, cpumask_t *mask);
2132
5c45bf27 2133extern int sched_mc_power_savings, sched_smt_power_savings;
5c45bf27 2134
1da177e4
LT		 2135extern void normalize_rt_tasks(void);
2136
052f1dc7 2137#ifdef CONFIG_GROUP_SCHED
9b5b7751 2138
4cf86d77 2139extern struct task_group init_task_group;
eff766a6
PZ		 2140#ifdef CONFIG_USER_SCHED
2141extern struct task_group root_task_group;
2142#endif
9b5b7751 2143
ec7dc8ac 2144extern struct task_group *sched_create_group(struct task_group *parent);
4cf86d77 2145extern void sched_destroy_group(struct task_group *tg);
9b5b7751 2146extern void sched_move_task(struct task_struct *tsk);
052f1dc7 2147#ifdef CONFIG_FAIR_GROUP_SCHED
4cf86d77 2148extern int sched_group_set_shares(struct task_group *tg, unsigned long shares);
5cb350ba 2149extern unsigned long sched_group_shares(struct task_group *tg);
052f1dc7
PZ		 2150#endif
2151#ifdef CONFIG_RT_GROUP_SCHED
9f0c1e56
PZ		 2152extern int sched_group_set_rt_runtime(struct task_group *tg,
2153 long rt_runtime_us);
2154extern long sched_group_rt_runtime(struct task_group *tg);
d0b27fa7
PZ		 2155extern int sched_group_set_rt_period(struct task_group *tg,
2156 long rt_period_us);
2157extern long sched_group_rt_period(struct task_group *tg);
052f1dc7 2158#endif
9b5b7751
SV		 2159#endif
2160
4b98d11b
AD		 2161#ifdef CONFIG_TASK_XACCT
2162static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
2163{
940389b8 2164 tsk->ioac.rchar += amt;
4b98d11b
AD		 2165}
2166
2167static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
2168{
940389b8 2169 tsk->ioac.wchar += amt;
4b98d11b
AD		 2170}
2171
2172static inline void inc_syscr(struct task_struct *tsk)
2173{
940389b8 2174 tsk->ioac.syscr++;
4b98d11b
AD		 2175}
2176
2177static inline void inc_syscw(struct task_struct *tsk)
2178{
940389b8 2179 tsk->ioac.syscw++;
4b98d11b
AD		 2180}
2181#else
2182static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
2183{
2184}
2185
2186static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
2187{
2188}
2189
2190static inline void inc_syscr(struct task_struct *tsk)
2191{
2192}
2193
2194static inline void inc_syscw(struct task_struct *tsk)
2195{
2196}
2197#endif
2198
82455257
DH		 2199#ifndef TASK_SIZE_OF
2200#define TASK_SIZE_OF(tsk) TASK_SIZE
2201#endif
2202
cf475ad2
BS		 2203#ifdef CONFIG_MM_OWNER
2204extern void mm_update_next_owner(struct mm_struct *mm);
2205extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p);
2206#else
2207static inline void mm_update_next_owner(struct mm_struct *mm)
2208{
2209}
2210
2211static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
2212{
2213}
2214#endif /* CONFIG_MM_OWNER */
2215
7c731e0a
SR		 2216#define TASK_STATE_TO_CHAR_STR "RSDTtZX"
2217
1da177e4
LT		 2218#endif /* __KERNEL__ */
2219
2220#endif
kernel source for telekom puls (alcatel/mediatek)