#include <linux/sched/prio.h>
-#include <asm/param.h> /* for HZ */
-
#include <linux/capability.h>
-#include <linux/threads.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/timex.h>
-#include <linux/jiffies.h>
#include <linux/mutex.h>
#include <linux/plist.h>
-#include <linux/rbtree.h>
-#include <linux/thread_info.h>
-#include <linux/cpumask.h>
-#include <linux/errno.h>
-#include <linux/nodemask.h>
-#include <linux/mm_types.h>
-#include <linux/preempt.h>
-
-#include <asm/page.h>
+#include <linux/mm_types_task.h>
#include <asm/ptrace.h>
-#include <linux/smp.h>
#include <linux/sem.h>
#include <linux/shm.h>
#include <linux/signal.h>
-#include <linux/compiler.h>
-#include <linux/completion.h>
#include <linux/signal_types.h>
#include <linux/pid.h>
-#include <linux/percpu.h>
-#include <linux/topology.h>
#include <linux/seccomp.h>
-#include <linux/rcupdate.h>
#include <linux/rculist.h>
#include <linux/rtmutex.h>
-#include <linux/time.h>
-#include <linux/param.h>
#include <linux/resource.h>
-#include <linux/timer.h>
#include <linux/hrtimer.h>
#include <linux/kcov.h>
#include <linux/task_io_accounting.h>
#include <linux/latencytop.h>
#include <linux/cred.h>
-#include <linux/llist.h>
-#include <linux/uidgid.h>
#include <linux/gfp.h>
#include <linux/topology.h>
#include <linux/magic.h>
#include <linux/cgroup-defs.h>
-#include <asm/processor.h>
-
-struct sched_attr;
-struct sched_param;
+#include <asm/current.h>
-struct futex_pi_state;
-struct robust_list_head;
+/* task_struct member predeclarations: */
+struct audit_context;
+struct autogroup;
+struct backing_dev_info;
struct bio_list;
-struct fs_struct;
-struct perf_event_context;
struct blk_plug;
+struct cfs_rq;
struct filename;
+struct fs_struct;
+struct futex_pi_state;
+struct io_context;
+struct mempolicy;
struct nameidata;
-
-/*
- * These are the constant used to fake the fixed-point load-average
- * counting. Some notes:
- * - 11 bit fractions expand to 22 bits by the multiplies: this gives
- * a load-average precision of 10 bits integer + 11 bits fractional
- * - if you want to count load-averages more often, you need more
- * precision, or rounding will get you. With 2-second counting freq,
- * the EXP_n values would be 1981, 2034 and 2043 if still using only
- * 11 bit fractions.
- */
-extern unsigned long avenrun[]; /* Load averages */
-extern void get_avenrun(unsigned long *loads, unsigned long offset, int shift);
-
-#define FSHIFT 11 /* nr of bits of precision */
-#define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */
-#define LOAD_FREQ (5*HZ+1) /* 5 sec intervals */
-#define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */
-#define EXP_5 2014 /* 1/exp(5sec/5min) */
-#define EXP_15 2037 /* 1/exp(5sec/15min) */
-
-#define CALC_LOAD(load,exp,n) \
- load *= exp; \
- load += n*(FIXED_1-exp); \
- load >>= FSHIFT;
-
-extern unsigned long total_forks;
-extern int nr_threads;
-DECLARE_PER_CPU(unsigned long, process_counts);
-extern int nr_processes(void);
-extern unsigned long nr_running(void);
-extern bool single_task_running(void);
-extern unsigned long nr_iowait(void);
-extern unsigned long nr_iowait_cpu(int cpu);
-extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load);
-
-extern void calc_global_load(unsigned long ticks);
-
-#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
-extern void cpu_load_update_nohz_start(void);
-extern void cpu_load_update_nohz_stop(void);
-#else
-static inline void cpu_load_update_nohz_start(void) { }
-static inline void cpu_load_update_nohz_stop(void) { }
-#endif
-
-extern void dump_cpu_task(int cpu);
-
+struct nsproxy;
+struct perf_event_context;
+struct pid_namespace;
+struct pipe_inode_info;
+struct rcu_node;
+struct reclaim_state;
+struct robust_list_head;
+struct sched_attr;
+struct sched_param;
struct seq_file;
-struct cfs_rq;
+struct sighand_struct;
+struct signal_struct;
+struct task_delay_info;
struct task_group;
-#ifdef CONFIG_SCHED_DEBUG
-extern void proc_sched_show_task(struct task_struct *p, struct seq_file *m);
-extern void proc_sched_set_task(struct task_struct *p);
-#endif
+struct task_struct;
+struct uts_namespace;
/*
* Task state bitmask. NOTE! These bits are also
/* Task command name length */
#define TASK_COMM_LEN 16
-#include <linux/spinlock.h>
-
-/*
- * This serializes "schedule()" and also protects
- * the run-queue from deletions/modifications (but
- * _adding_ to the beginning of the run-queue has
- * a separate lock).
- */
-extern rwlock_t tasklist_lock;
-extern spinlock_t mmlist_lock;
-
-struct task_struct;
-
-#ifdef CONFIG_PROVE_RCU
-extern int lockdep_tasklist_lock_is_held(void);
-#endif /* #ifdef CONFIG_PROVE_RCU */
-
-extern void sched_init(void);
-extern void sched_init_smp(void);
-extern asmlinkage void schedule_tail(struct task_struct *prev);
-extern void init_idle(struct task_struct *idle, int cpu);
-extern void init_idle_bootup_task(struct task_struct *idle);
-
extern cpumask_var_t cpu_isolated_map;
extern int runqueue_is_locked(int cpu);
-#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
-extern void nohz_balance_enter_idle(int cpu);
-extern void set_cpu_sd_state_idle(void);
-extern int get_nohz_timer_target(void);
-#else
-static inline void nohz_balance_enter_idle(int cpu) { }
-static inline void set_cpu_sd_state_idle(void) { }
-#endif
-
-/*
- * Only dump TASK_* tasks. (0 for all tasks)
- */
-extern void show_state_filter(unsigned long state_filter);
-
-static inline void show_state(void)
-{
- show_state_filter(0);
-}
-
-extern void show_regs(struct pt_regs *);
-
-/*
- * TASK is a pointer to the task whose backtrace we want to see (or NULL for current
- * task), SP is the stack pointer of the first frame that should be shown in the back
- * trace (or NULL if the entire call-chain of the task should be shown).
- */
-extern void show_stack(struct task_struct *task, unsigned long *sp);
-
-extern void cpu_init (void);
-extern void trap_init(void);
-extern void update_process_times(int user);
extern void scheduler_tick(void);
-extern int sched_cpu_starting(unsigned int cpu);
-extern int sched_cpu_activate(unsigned int cpu);
-extern int sched_cpu_deactivate(unsigned int cpu);
-
-#ifdef CONFIG_HOTPLUG_CPU
-extern int sched_cpu_dying(unsigned int cpu);
-#else
-# define sched_cpu_dying NULL
-#endif
-
-extern void sched_show_task(struct task_struct *p);
-
-#ifdef CONFIG_LOCKUP_DETECTOR
-extern void touch_softlockup_watchdog_sched(void);
-extern void touch_softlockup_watchdog(void);
-extern void touch_softlockup_watchdog_sync(void);
-extern void touch_all_softlockup_watchdogs(void);
-extern int proc_dowatchdog_thresh(struct ctl_table *table, int write,
- void __user *buffer,
- size_t *lenp, loff_t *ppos);
-extern unsigned int softlockup_panic;
-extern unsigned int hardlockup_panic;
-void lockup_detector_init(void);
-#else
-static inline void touch_softlockup_watchdog_sched(void)
-{
-}
-static inline void touch_softlockup_watchdog(void)
-{
-}
-static inline void touch_softlockup_watchdog_sync(void)
-{
-}
-static inline void touch_all_softlockup_watchdogs(void)
-{
-}
-static inline void lockup_detector_init(void)
-{
-}
-#endif
-
-#ifdef CONFIG_DETECT_HUNG_TASK
-void reset_hung_task_detector(void);
-#else
-static inline void reset_hung_task_detector(void)
-{
-}
-#endif
-
-/* Attach to any functions which should be ignored in wchan output. */
-#define __sched __attribute__((__section__(".sched.text")))
-
-/* Linker adds these: start and end of __sched functions */
-extern char __sched_text_start[], __sched_text_end[];
-
-/* Is this address in the __sched functions? */
-extern int in_sched_functions(unsigned long addr);
#define MAX_SCHEDULE_TIMEOUT LONG_MAX
extern signed long schedule_timeout(signed long timeout);
extern long io_schedule_timeout(long timeout);
extern void io_schedule(void);
-void __noreturn do_task_dead(void);
-
-struct nsproxy;
-struct user_namespace;
-
-#ifdef CONFIG_MMU
-extern void arch_pick_mmap_layout(struct mm_struct *mm);
-extern unsigned long
-arch_get_unmapped_area(struct file *, unsigned long, unsigned long,
- unsigned long, unsigned long);
-extern unsigned long
-arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
- unsigned long len, unsigned long pgoff,
- unsigned long flags);
-#else
-static inline void arch_pick_mmap_layout(struct mm_struct *mm) {}
-#endif
-
-#define SUID_DUMP_DISABLE 0 /* No setuid dumping */
-#define SUID_DUMP_USER 1 /* Dump as user of process */
-#define SUID_DUMP_ROOT 2 /* Dump as root */
-
-/* mm flags */
-
-/* for SUID_DUMP_* above */
-#define MMF_DUMPABLE_BITS 2
-#define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1)
-
-extern void set_dumpable(struct mm_struct *mm, int value);
-/*
- * This returns the actual value of the suid_dumpable flag. For things
- * that are using this for checking for privilege transitions, it must
- * test against SUID_DUMP_USER rather than treating it as a boolean
- * value.
- */
-static inline int __get_dumpable(unsigned long mm_flags)
-{
- return mm_flags & MMF_DUMPABLE_MASK;
-}
-
-static inline int get_dumpable(struct mm_struct *mm)
-{
- return __get_dumpable(mm->flags);
-}
-
-/* coredump filter bits */
-#define MMF_DUMP_ANON_PRIVATE 2
-#define MMF_DUMP_ANON_SHARED 3
-#define MMF_DUMP_MAPPED_PRIVATE 4
-#define MMF_DUMP_MAPPED_SHARED 5
-#define MMF_DUMP_ELF_HEADERS 6
-#define MMF_DUMP_HUGETLB_PRIVATE 7
-#define MMF_DUMP_HUGETLB_SHARED 8
-#define MMF_DUMP_DAX_PRIVATE 9
-#define MMF_DUMP_DAX_SHARED 10
-
-#define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS
-#define MMF_DUMP_FILTER_BITS 9
-#define MMF_DUMP_FILTER_MASK \
- (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
-#define MMF_DUMP_FILTER_DEFAULT \
- ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\
- (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF)
-
-#ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
-# define MMF_DUMP_MASK_DEFAULT_ELF (1 << MMF_DUMP_ELF_HEADERS)
-#else
-# define MMF_DUMP_MASK_DEFAULT_ELF 0
-#endif
- /* leave room for more dump flags */
-#define MMF_VM_MERGEABLE 16 /* KSM may merge identical pages */
-#define MMF_VM_HUGEPAGE 17 /* set when VM_HUGEPAGE is set on vma */
-/*
- * This one-shot flag is dropped due to necessity of changing exe once again
- * on NFS restore
- */
-//#define MMF_EXE_FILE_CHANGED 18 /* see prctl_set_mm_exe_file() */
-
-#define MMF_HAS_UPROBES 19 /* has uprobes */
-#define MMF_RECALC_UPROBES 20 /* MMF_HAS_UPROBES can be wrong */
-#define MMF_OOM_SKIP 21 /* mm is of no interest for the OOM killer */
-#define MMF_UNSTABLE 22 /* mm is unstable for copy_from_user */
-#define MMF_HUGE_ZERO_PAGE 23 /* mm has ever used the global huge zero page */
-
-#define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK)
-
-struct sighand_struct {
- atomic_t count;
- struct k_sigaction action[_NSIG];
- spinlock_t siglock;
- wait_queue_head_t signalfd_wqh;
-};
-
-struct pacct_struct {
- int ac_flag;
- long ac_exitcode;
- unsigned long ac_mem;
- u64 ac_utime, ac_stime;
- unsigned long ac_minflt, ac_majflt;
-};
-
-struct cpu_itimer {
- u64 expires;
- u64 incr;
-};
-
/**
* struct prev_cputime - snaphsot of system and user cputime
* @utime: time spent in user mode
#endif
};
-static inline void prev_cputime_init(struct prev_cputime *prev)
-{
-#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
- prev->utime = prev->stime = 0;
- raw_spin_lock_init(&prev->lock);
-#endif
-}
-
/**
* struct task_cputime - collected CPU time counts
* @utime: time spent in user mode, in nanoseconds
#define prof_exp stime
#define sched_exp sum_exec_runtime
-/*
- * This is the atomic variant of task_cputime, which can be used for
- * storing and updating task_cputime statistics without locking.
- */
-struct task_cputime_atomic {
- atomic64_t utime;
- atomic64_t stime;
- atomic64_t sum_exec_runtime;
-};
-
-#define INIT_CPUTIME_ATOMIC \
- (struct task_cputime_atomic) { \
- .utime = ATOMIC64_INIT(0), \
- .stime = ATOMIC64_INIT(0), \
- .sum_exec_runtime = ATOMIC64_INIT(0), \
- }
-
-#define PREEMPT_DISABLED (PREEMPT_DISABLE_OFFSET + PREEMPT_ENABLED)
-
-/*
- * Disable preemption until the scheduler is running -- use an unconditional
- * value so that it also works on !PREEMPT_COUNT kernels.
- *
- * Reset by start_kernel()->sched_init()->init_idle()->init_idle_preempt_count().
- */
-#define INIT_PREEMPT_COUNT PREEMPT_OFFSET
-
-/*
- * Initial preempt_count value; reflects the preempt_count schedule invariant
- * which states that during context switches:
- *
- * preempt_count() == 2*PREEMPT_DISABLE_OFFSET
- *
- * Note: PREEMPT_DISABLE_OFFSET is 0 for !PREEMPT_COUNT kernels.
- * Note: See finish_task_switch().
- */
-#define FORK_PREEMPT_COUNT (2*PREEMPT_DISABLE_OFFSET + PREEMPT_ENABLED)
-
-/**
- * struct thread_group_cputimer - thread group interval timer counts
- * @cputime_atomic: atomic thread group interval timers.
- * @running: true when there are timers running and
- * @cputime_atomic receives updates.
- * @checking_timer: true when a thread in the group is in the
- * process of checking for thread group timers.
- *
- * This structure contains the version of task_cputime, above, that is
- * used for thread group CPU timer calculations.
- */
-struct thread_group_cputimer {
- struct task_cputime_atomic cputime_atomic;
- bool running;
- bool checking_timer;
-};
-
#include <linux/rwsem.h>
-struct autogroup;
-
-/*
- * NOTE! "signal_struct" does not have its own
- * locking, because a shared signal_struct always
- * implies a shared sighand_struct, so locking
- * sighand_struct is always a proper superset of
- * the locking of signal_struct.
- */
-struct signal_struct {
- atomic_t sigcnt;
- atomic_t live;
- int nr_threads;
- struct list_head thread_head;
-
- wait_queue_head_t wait_chldexit; /* for wait4() */
-
- /* current thread group signal load-balancing target: */
- struct task_struct *curr_target;
-
- /* shared signal handling: */
- struct sigpending shared_pending;
-
- /* thread group exit support */
- int group_exit_code;
- /* overloaded:
- * - notify group_exit_task when ->count is equal to notify_count
- * - everyone except group_exit_task is stopped during signal delivery
- * of fatal signals, group_exit_task processes the signal.
- */
- int notify_count;
- struct task_struct *group_exit_task;
-
- /* thread group stop support, overloads group_exit_code too */
- int group_stop_count;
- unsigned int flags; /* see SIGNAL_* flags below */
-
- /*
- * PR_SET_CHILD_SUBREAPER marks a process, like a service
- * manager, to re-parent orphan (double-forking) child processes
- * to this process instead of 'init'. The service manager is
- * able to receive SIGCHLD signals and is able to investigate
- * the process until it calls wait(). All children of this
- * process will inherit a flag if they should look for a
- * child_subreaper process at exit.
- */
- unsigned int is_child_subreaper:1;
- unsigned int has_child_subreaper:1;
-
-#ifdef CONFIG_POSIX_TIMERS
-
- /* POSIX.1b Interval Timers */
- int posix_timer_id;
- struct list_head posix_timers;
-
- /* ITIMER_REAL timer for the process */
- struct hrtimer real_timer;
- ktime_t it_real_incr;
-
- /*
- * ITIMER_PROF and ITIMER_VIRTUAL timers for the process, we use
- * CPUCLOCK_PROF and CPUCLOCK_VIRT for indexing array as these
- * values are defined to 0 and 1 respectively
- */
- struct cpu_itimer it[2];
-
- /*
- * Thread group totals for process CPU timers.
- * See thread_group_cputimer(), et al, for details.
- */
- struct thread_group_cputimer cputimer;
-
- /* Earliest-expiration cache. */
- struct task_cputime cputime_expires;
-
- struct list_head cpu_timers[3];
-
-#endif
-
- struct pid *leader_pid;
-
-#ifdef CONFIG_NO_HZ_FULL
- atomic_t tick_dep_mask;
-#endif
-
- struct pid *tty_old_pgrp;
-
- /* boolean value for session group leader */
- int leader;
-
- struct tty_struct *tty; /* NULL if no tty */
-
-#ifdef CONFIG_SCHED_AUTOGROUP
- struct autogroup *autogroup;
-#endif
- /*
- * Cumulative resource counters for dead threads in the group,
- * and for reaped dead child processes forked by this group.
- * Live threads maintain their own counters and add to these
- * in __exit_signal, except for the group leader.
- */
- seqlock_t stats_lock;
- u64 utime, stime, cutime, cstime;
- u64 gtime;
- u64 cgtime;
- struct prev_cputime prev_cputime;
- unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
- unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
- unsigned long inblock, oublock, cinblock, coublock;
- unsigned long maxrss, cmaxrss;
- struct task_io_accounting ioac;
-
- /*
- * Cumulative ns of schedule CPU time fo dead threads in the
- * group, not including a zombie group leader, (This only differs
- * from jiffies_to_ns(utime + stime) if sched_clock uses something
- * other than jiffies.)
- */
- unsigned long long sum_sched_runtime;
-
- /*
- * We don't bother to synchronize most readers of this at all,
- * because there is no reader checking a limit that actually needs
- * to get both rlim_cur and rlim_max atomically, and either one
- * alone is a single word that can safely be read normally.
- * getrlimit/setrlimit use task_lock(current->group_leader) to
- * protect this instead of the siglock, because they really
- * have no need to disable irqs.
- */
- struct rlimit rlim[RLIM_NLIMITS];
-
-#ifdef CONFIG_BSD_PROCESS_ACCT
- struct pacct_struct pacct; /* per-process accounting information */
-#endif
-#ifdef CONFIG_TASKSTATS
- struct taskstats *stats;
-#endif
-#ifdef CONFIG_AUDIT
- unsigned audit_tty;
- struct tty_audit_buf *tty_audit_buf;
-#endif
-
- /*
- * Thread is the potential origin of an oom condition; kill first on
- * oom
- */
- bool oom_flag_origin;
- short oom_score_adj; /* OOM kill score adjustment */
- short oom_score_adj_min; /* OOM kill score adjustment min value.
- * Only settable by CAP_SYS_RESOURCE. */
- struct mm_struct *oom_mm; /* recorded mm when the thread group got
- * killed by the oom killer */
-
- struct mutex cred_guard_mutex; /* guard against foreign influences on
- * credential calculations
- * (notably. ptrace) */
-};
-
-/*
- * Bits in flags field of signal_struct.
- */
-#define SIGNAL_STOP_STOPPED 0x00000001 /* job control stop in effect */
-#define SIGNAL_STOP_CONTINUED 0x00000002 /* SIGCONT since WCONTINUED reap */
-#define SIGNAL_GROUP_EXIT 0x00000004 /* group exit in progress */
-#define SIGNAL_GROUP_COREDUMP 0x00000008 /* coredump in progress */
-/*
- * Pending notifications to parent.
- */
-#define SIGNAL_CLD_STOPPED 0x00000010
-#define SIGNAL_CLD_CONTINUED 0x00000020
-#define SIGNAL_CLD_MASK (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED)
-
-#define SIGNAL_UNKILLABLE 0x00000040 /* for init: ignore fatal signals */
-
-#define SIGNAL_STOP_MASK (SIGNAL_CLD_MASK | SIGNAL_STOP_STOPPED | \
- SIGNAL_STOP_CONTINUED)
-
-static inline void signal_set_stop_flags(struct signal_struct *sig,
- unsigned int flags)
-{
- WARN_ON(sig->flags & (SIGNAL_GROUP_EXIT|SIGNAL_GROUP_COREDUMP));
- sig->flags = (sig->flags & ~SIGNAL_STOP_MASK) | flags;
-}
-
-/* If true, all threads except ->group_exit_task have pending SIGKILL */
-static inline int signal_group_exit(const struct signal_struct *sig)
-{
- return (sig->flags & SIGNAL_GROUP_EXIT) ||
- (sig->group_exit_task != NULL);
-}
-
-/*
- * Some day this will be a full-fledged user tracking system..
- */
-struct user_struct {
- atomic_t __count; /* reference count */
- atomic_t processes; /* How many processes does this user have? */
- atomic_t sigpending; /* How many pending signals does this user have? */
-#ifdef CONFIG_FANOTIFY
- atomic_t fanotify_listeners;
-#endif
-#ifdef CONFIG_EPOLL
- atomic_long_t epoll_watches; /* The number of file descriptors currently watched */
-#endif
-#ifdef CONFIG_POSIX_MQUEUE
- /* protected by mq_lock */
- unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
-#endif
- unsigned long locked_shm; /* How many pages of mlocked shm ? */
- unsigned long unix_inflight; /* How many files in flight in unix sockets */
- atomic_long_t pipe_bufs; /* how many pages are allocated in pipe buffers */
-
-#ifdef CONFIG_KEYS
- struct key *uid_keyring; /* UID specific keyring */
- struct key *session_keyring; /* UID's default session keyring */
-#endif
-
- /* Hash table maintenance information */
- struct hlist_node uidhash_node;
- kuid_t uid;
-
-#if defined(CONFIG_PERF_EVENTS) || defined(CONFIG_BPF_SYSCALL)
- atomic_long_t locked_vm;
-#endif
-};
-
-extern int uids_sysfs_init(void);
-
-extern struct user_struct *find_user(kuid_t);
-
-extern struct user_struct root_user;
-#define INIT_USER (&root_user)
-
-
-struct backing_dev_info;
-struct reclaim_state;
#ifdef CONFIG_SCHED_INFO
struct sched_info {
};
#endif /* CONFIG_SCHED_INFO */
-struct task_delay_info;
-
-static inline int sched_info_on(void)
-{
-#ifdef CONFIG_SCHEDSTATS
- return 1;
-#elif defined(CONFIG_TASK_DELAY_ACCT)
- extern int delayacct_on;
- return delayacct_on;
-#else
- return 0;
-#endif
-}
-
-#ifdef CONFIG_SCHEDSTATS
-void force_schedstat_enabled(void);
-#endif
-
/*
* Integer metrics need fixed point arithmetic, e.g., sched/fair
* has a few: load, load_avg, util_avg, freq, and capacity.
# define SCHED_FIXEDPOINT_SHIFT 10
# define SCHED_FIXEDPOINT_SCALE (1L << SCHED_FIXEDPOINT_SHIFT)
-struct io_context; /* See blkdev.h */
-
-
#ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
extern void prefetch_stack(struct task_struct *t);
#else
static inline void prefetch_stack(struct task_struct *t) { }
#endif
-struct audit_context; /* See audit.c */
-struct mempolicy;
-struct pipe_inode_info;
-struct uts_namespace;
-
struct load_weight {
unsigned long weight;
u32 inv_weight;
} b; /* Bits. */
u32 s; /* Set of bits. */
};
-struct rcu_node;
enum perf_event_task_context {
perf_invalid_context = -1,
struct wake_q_node *next;
};
-/* Track pages that require TLB flushes */
-struct tlbflush_unmap_batch {
- /*
- * Each bit set is a CPU that potentially has a TLB entry for one of
- * the PFNs being flushed. See set_tlb_ubc_flush_pending().
- */
- struct cpumask cpumask;
-
- /* True if any bit in cpumask is set */
- bool flush_required;
-
- /*
- * If true then the PTE was dirty when unmapped. The entry must be
- * flushed before IO is initiated or a stale TLB entry potentially
- * allows an update without redirtying the page.
- */
- bool writable;
-};
-
struct task_struct {
#ifdef CONFIG_THREAD_INFO_IN_TASK
/*
unsigned long numa_pages_migrated;
#endif /* CONFIG_NUMA_BALANCING */
-#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
struct tlbflush_unmap_batch tlb_ubc;
-#endif
struct rcu_head rcu;
*/
};
-#ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT
-extern int arch_task_struct_size __read_mostly;
-#else
-# define arch_task_struct_size (sizeof(struct task_struct))
-#endif
-
-#ifdef CONFIG_VMAP_STACK
-static inline struct vm_struct *task_stack_vm_area(const struct task_struct *t)
-{
- return t->stack_vm_area;
-}
-#else
-static inline struct vm_struct *task_stack_vm_area(const struct task_struct *t)
-{
- return NULL;
-}
-#endif
-
-#define TNF_MIGRATED 0x01
-#define TNF_NO_GROUP 0x02
-#define TNF_SHARED 0x04
-#define TNF_FAULT_LOCAL 0x08
-#define TNF_MIGRATE_FAIL 0x10
-
-static inline bool in_vfork(struct task_struct *tsk)
-{
- bool ret;
-
- /*
- * need RCU to access ->real_parent if CLONE_VM was used along with
- * CLONE_PARENT.
- *
- * We check real_parent->mm == tsk->mm because CLONE_VFORK does not
- * imply CLONE_VM
- *
- * CLONE_VFORK can be used with CLONE_PARENT/CLONE_THREAD and thus
- * ->real_parent is not necessarily the task doing vfork(), so in
- * theory we can't rely on task_lock() if we want to dereference it.
- *
- * And in this case we can't trust the real_parent->mm == tsk->mm
- * check, it can be false negative. But we do not care, if init or
- * another oom-unkillable task does this it should blame itself.
- */
- rcu_read_lock();
- ret = tsk->vfork_done && tsk->real_parent->mm == tsk->mm;
- rcu_read_unlock();
-
- return ret;
-}
-
-#ifdef CONFIG_NUMA_BALANCING
-extern void task_numa_fault(int last_node, int node, int pages, int flags);
-extern pid_t task_numa_group_id(struct task_struct *p);
-extern void set_numabalancing_state(bool enabled);
-extern void task_numa_free(struct task_struct *p);
-extern bool should_numa_migrate_memory(struct task_struct *p, struct page *page,
- int src_nid, int dst_cpu);
-#else
-static inline void task_numa_fault(int last_node, int node, int pages,
- int flags)
-{
-}
-static inline pid_t task_numa_group_id(struct task_struct *p)
-{
- return 0;
-}
-static inline void set_numabalancing_state(bool enabled)
-{
-}
-static inline void task_numa_free(struct task_struct *p)
-{
-}
-static inline bool should_numa_migrate_memory(struct task_struct *p,
- struct page *page, int src_nid, int dst_cpu)
-{
- return true;
-}
-#endif
-
static inline struct pid *task_pid(struct task_struct *task)
{
return task->pids[PIDTYPE_PID].pid;
return task->group_leader->pids[PIDTYPE_SID].pid;
}
-struct pid_namespace;
-
/*
* the helpers to get the task's different pids as they are seen
* from various namespaces
struct task_struct *task_rcu_dereference(struct task_struct **ptask);
struct task_struct *try_get_task_struct(struct task_struct **ptask);
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
-extern void task_cputime(struct task_struct *t,
- u64 *utime, u64 *stime);
-extern u64 task_gtime(struct task_struct *t);
-#else
-static inline void task_cputime(struct task_struct *t,
- u64 *utime, u64 *stime)
-{
- *utime = t->utime;
- *stime = t->stime;
-}
-
-static inline u64 task_gtime(struct task_struct *t)
-{
- return t->gtime;
-}
-#endif
-
-#ifdef CONFIG_ARCH_HAS_SCALED_CPUTIME
-static inline void task_cputime_scaled(struct task_struct *t,
- u64 *utimescaled,
- u64 *stimescaled)
-{
- *utimescaled = t->utimescaled;
- *stimescaled = t->stimescaled;
-}
-#else
-static inline void task_cputime_scaled(struct task_struct *t,
- u64 *utimescaled,
- u64 *stimescaled)
-{
- task_cputime(t, utimescaled, stimescaled);
-}
-#endif
-
-extern void task_cputime_adjusted(struct task_struct *p, u64 *ut, u64 *st);
-extern void thread_group_cputime_adjusted(struct task_struct *p, u64 *ut, u64 *st);
-
/*
* Per process flags
*/
#define tsk_used_math(p) ((p)->flags & PF_USED_MATH)
#define used_math() tsk_used_math(current)
-/* __GFP_IO isn't allowed if PF_MEMALLOC_NOIO is set in current->flags
- * __GFP_FS is also cleared as it implies __GFP_IO.
- */
-static inline gfp_t memalloc_noio_flags(gfp_t flags)
-{
- if (unlikely(current->flags & PF_MEMALLOC_NOIO))
- flags &= ~(__GFP_IO | __GFP_FS);
- return flags;
-}
-
-static inline unsigned int memalloc_noio_save(void)
-{
- unsigned int flags = current->flags & PF_MEMALLOC_NOIO;
- current->flags |= PF_MEMALLOC_NOIO;
- return flags;
-}
-
-static inline void memalloc_noio_restore(unsigned int flags)
-{
- current->flags = (current->flags & ~PF_MEMALLOC_NOIO) | flags;
-}
-
/* Per-process atomic flags. */
#define PFA_NO_NEW_PRIVS 0 /* May not gain new privileges. */
#define PFA_SPREAD_PAGE 1 /* Spread page cache over cpuset */
TASK_PFA_TEST(LMK_WAITING, lmk_waiting)
TASK_PFA_SET(LMK_WAITING, lmk_waiting)
-/*
- * task->jobctl flags
- */
-#define JOBCTL_STOP_SIGMASK 0xffff /* signr of the last group stop */
-
-#define JOBCTL_STOP_DEQUEUED_BIT 16 /* stop signal dequeued */
-#define JOBCTL_STOP_PENDING_BIT 17 /* task should stop for group stop */
-#define JOBCTL_STOP_CONSUME_BIT 18 /* consume group stop count */
-#define JOBCTL_TRAP_STOP_BIT 19 /* trap for STOP */
-#define JOBCTL_TRAP_NOTIFY_BIT 20 /* trap for NOTIFY */
-#define JOBCTL_TRAPPING_BIT 21 /* switching to TRACED */
-#define JOBCTL_LISTENING_BIT 22 /* ptracer is listening for events */
-
-#define JOBCTL_STOP_DEQUEUED (1UL << JOBCTL_STOP_DEQUEUED_BIT)
-#define JOBCTL_STOP_PENDING (1UL << JOBCTL_STOP_PENDING_BIT)
-#define JOBCTL_STOP_CONSUME (1UL << JOBCTL_STOP_CONSUME_BIT)
-#define JOBCTL_TRAP_STOP (1UL << JOBCTL_TRAP_STOP_BIT)
-#define JOBCTL_TRAP_NOTIFY (1UL << JOBCTL_TRAP_NOTIFY_BIT)
-#define JOBCTL_TRAPPING (1UL << JOBCTL_TRAPPING_BIT)
-#define JOBCTL_LISTENING (1UL << JOBCTL_LISTENING_BIT)
-
-#define JOBCTL_TRAP_MASK (JOBCTL_TRAP_STOP | JOBCTL_TRAP_NOTIFY)
-#define JOBCTL_PENDING_MASK (JOBCTL_STOP_PENDING | JOBCTL_TRAP_MASK)
-
-extern bool task_set_jobctl_pending(struct task_struct *task,
- unsigned long mask);
-extern void task_clear_jobctl_trapping(struct task_struct *task);
-extern void task_clear_jobctl_pending(struct task_struct *task,
- unsigned long mask);
-
-static inline void rcu_copy_process(struct task_struct *p)
-{
-#ifdef CONFIG_PREEMPT_RCU
- p->rcu_read_lock_nesting = 0;
- p->rcu_read_unlock_special.s = 0;
- p->rcu_blocked_node = NULL;
- INIT_LIST_HEAD(&p->rcu_node_entry);
-#endif /* #ifdef CONFIG_PREEMPT_RCU */
-#ifdef CONFIG_TASKS_RCU
- p->rcu_tasks_holdout = false;
- INIT_LIST_HEAD(&p->rcu_tasks_holdout_list);
- p->rcu_tasks_idle_cpu = -1;
-#endif /* #ifdef CONFIG_TASKS_RCU */
-}
-
static inline void tsk_restore_flags(struct task_struct *task,
unsigned long orig_flags, unsigned long flags)
{
}
#endif
-#ifdef CONFIG_NO_HZ_COMMON
-void calc_load_enter_idle(void);
-void calc_load_exit_idle(void);
-#else
-static inline void calc_load_enter_idle(void) { }
-static inline void calc_load_exit_idle(void) { }
-#endif /* CONFIG_NO_HZ_COMMON */
-
#ifndef cpu_relax_yield
#define cpu_relax_yield() cpu_relax()
#endif
-extern unsigned long long
-task_sched_runtime(struct task_struct *task);
-
/* sched_exec is called by processes performing an exec */
#ifdef CONFIG_SMP
extern void sched_exec(void);
#define sched_exec() {}
#endif
-#ifdef CONFIG_HOTPLUG_CPU
-extern void idle_task_exit(void);
-#else
-static inline void idle_task_exit(void) {}
-#endif
-
-#if defined(CONFIG_NO_HZ_COMMON) && defined(CONFIG_SMP)
-extern void wake_up_nohz_cpu(int cpu);
-#else
-static inline void wake_up_nohz_cpu(int cpu) { }
-#endif
-
-#ifdef CONFIG_NO_HZ_FULL
-extern u64 scheduler_tick_max_deferment(void);
-#endif
-
-#ifdef CONFIG_SCHED_AUTOGROUP
-extern void sched_autogroup_create_attach(struct task_struct *p);
-extern void sched_autogroup_detach(struct task_struct *p);
-extern void sched_autogroup_fork(struct signal_struct *sig);
-extern void sched_autogroup_exit(struct signal_struct *sig);
-extern void sched_autogroup_exit_task(struct task_struct *p);
-#ifdef CONFIG_PROC_FS
-extern void proc_sched_autogroup_show_task(struct task_struct *p, struct seq_file *m);
-extern int proc_sched_autogroup_set_nice(struct task_struct *p, int nice);
-#endif
-#else
-static inline void sched_autogroup_create_attach(struct task_struct *p) { }
-static inline void sched_autogroup_detach(struct task_struct *p) { }
-static inline void sched_autogroup_fork(struct signal_struct *sig) { }
-static inline void sched_autogroup_exit(struct signal_struct *sig) { }
-static inline void sched_autogroup_exit_task(struct task_struct *p) { }
-#endif
-
extern int yield_to(struct task_struct *p, bool preempt);
extern void set_user_nice(struct task_struct *p, long nice);
extern int task_prio(const struct task_struct *p);
unsigned long stack[THREAD_SIZE/sizeof(long)];
};
-#ifndef __HAVE_ARCH_KSTACK_END
-static inline int kstack_end(void *addr)
+#ifdef CONFIG_THREAD_INFO_IN_TASK
+static inline struct thread_info *task_thread_info(struct task_struct *task)
{
- /* Reliable end of stack detection:
- * Some APM bios versions misalign the stack
- */
- return !(((unsigned long)addr+sizeof(void*)-1) & (THREAD_SIZE-sizeof(void*)));
+ return &task->thread_info;
}
+#elif !defined(__HAVE_THREAD_FUNCTIONS)
+# define task_thread_info(task) ((struct thread_info *)(task)->stack)
#endif
-extern union thread_union init_thread_union;
-extern struct task_struct init_task;
-
-extern struct mm_struct init_mm;
-
extern struct pid_namespace init_pid_ns;
/*
extern struct task_struct *find_task_by_pid_ns(pid_t nr,
struct pid_namespace *ns);
-/* per-UID process charging. */
-extern struct user_struct * alloc_uid(kuid_t);
-static inline struct user_struct *get_uid(struct user_struct *u)
-{
- atomic_inc(&u->__count);
- return u;
-}
-extern void free_uid(struct user_struct *);
-
-#include <asm/current.h>
-
-extern void xtime_update(unsigned long ticks);
-
extern int wake_up_state(struct task_struct *tsk, unsigned int state);
extern int wake_up_process(struct task_struct *tsk);
extern void wake_up_new_task(struct task_struct *tsk);
#else
static inline void kick_process(struct task_struct *tsk) { }
#endif
-extern int sched_fork(unsigned long clone_flags, struct task_struct *p);
-extern void sched_dead(struct task_struct *p);
-
-extern void proc_caches_init(void);
-extern void flush_signals(struct task_struct *);
-extern void ignore_signals(struct task_struct *);
-extern void flush_signal_handlers(struct task_struct *, int force_default);
-extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);
-
-static inline int kernel_dequeue_signal(siginfo_t *info)
-{
- struct task_struct *tsk = current;
- siginfo_t __info;
- int ret;
-
- spin_lock_irq(&tsk->sighand->siglock);
- ret = dequeue_signal(tsk, &tsk->blocked, info ?: &__info);
- spin_unlock_irq(&tsk->sighand->siglock);
-
- return ret;
-}
-
-static inline void kernel_signal_stop(void)
-{
- spin_lock_irq(¤t->sighand->siglock);
- if (current->jobctl & JOBCTL_STOP_DEQUEUED)
- __set_current_state(TASK_STOPPED);
- spin_unlock_irq(¤t->sighand->siglock);
-
- schedule();
-}
-
-extern void release_task(struct task_struct * p);
-extern int send_sig_info(int, struct siginfo *, struct task_struct *);
-extern int force_sigsegv(int, struct task_struct *);
-extern int force_sig_info(int, struct siginfo *, struct task_struct *);
-extern int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp);
-extern int kill_pid_info(int sig, struct siginfo *info, struct pid *pid);
-extern int kill_pid_info_as_cred(int, struct siginfo *, struct pid *,
- const struct cred *, u32);
-extern int kill_pgrp(struct pid *pid, int sig, int priv);
-extern int kill_pid(struct pid *pid, int sig, int priv);
-extern int kill_proc_info(int, struct siginfo *, pid_t);
-extern __must_check bool do_notify_parent(struct task_struct *, int);
-extern void __wake_up_parent(struct task_struct *p, struct task_struct *parent);
-extern void force_sig(int, struct task_struct *);
-extern int send_sig(int, struct task_struct *, int);
-extern int zap_other_threads(struct task_struct *p);
-extern struct sigqueue *sigqueue_alloc(void);
-extern void sigqueue_free(struct sigqueue *);
-extern int send_sigqueue(struct sigqueue *, struct task_struct *, int group);
-extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
-
-#ifdef TIF_RESTORE_SIGMASK
-/*
- * Legacy restore_sigmask accessors. These are inefficient on
- * SMP architectures because they require atomic operations.
- */
-
-/**
- * set_restore_sigmask() - make sure saved_sigmask processing gets done
- *
- * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code
- * will run before returning to user mode, to process the flag. For
- * all callers, TIF_SIGPENDING is already set or it's no harm to set
- * it. TIF_RESTORE_SIGMASK need not be in the set of bits that the
- * arch code will notice on return to user mode, in case those bits
- * are scarce. We set TIF_SIGPENDING here to ensure that the arch
- * signal code always gets run when TIF_RESTORE_SIGMASK is set.
- */
-static inline void set_restore_sigmask(void)
-{
- set_thread_flag(TIF_RESTORE_SIGMASK);
- WARN_ON(!test_thread_flag(TIF_SIGPENDING));
-}
-static inline void clear_restore_sigmask(void)
-{
- clear_thread_flag(TIF_RESTORE_SIGMASK);
-}
-static inline bool test_restore_sigmask(void)
-{
- return test_thread_flag(TIF_RESTORE_SIGMASK);
-}
-static inline bool test_and_clear_restore_sigmask(void)
-{
- return test_and_clear_thread_flag(TIF_RESTORE_SIGMASK);
-}
-
-#else /* TIF_RESTORE_SIGMASK */
-
-/* Higher-quality implementation, used if TIF_RESTORE_SIGMASK doesn't exist. */
-static inline void set_restore_sigmask(void)
-{
- current->restore_sigmask = true;
- WARN_ON(!test_thread_flag(TIF_SIGPENDING));
-}
-static inline void clear_restore_sigmask(void)
-{
- current->restore_sigmask = false;
-}
-static inline bool test_restore_sigmask(void)
-{
- return current->restore_sigmask;
-}
-static inline bool test_and_clear_restore_sigmask(void)
-{
- if (!current->restore_sigmask)
- return false;
- current->restore_sigmask = false;
- return true;
-}
-#endif
-
-static inline void restore_saved_sigmask(void)
-{
- if (test_and_clear_restore_sigmask())
- __set_current_blocked(¤t->saved_sigmask);
-}
-
-static inline sigset_t *sigmask_to_save(void)
-{
- sigset_t *res = ¤t->blocked;
- if (unlikely(test_restore_sigmask()))
- res = ¤t->saved_sigmask;
- return res;
-}
-
-static inline int kill_cad_pid(int sig, int priv)
-{
- return kill_pid(cad_pid, sig, priv);
-}
-
-/* These can be the second arg to send_sig_info/send_group_sig_info. */
-#define SEND_SIG_NOINFO ((struct siginfo *) 0)
-#define SEND_SIG_PRIV ((struct siginfo *) 1)
-#define SEND_SIG_FORCED ((struct siginfo *) 2)
-
-/*
- * True if we are on the alternate signal stack.
- */
-static inline int on_sig_stack(unsigned long sp)
-{
- /*
- * If the signal stack is SS_AUTODISARM then, by construction, we
- * can't be on the signal stack unless user code deliberately set
- * SS_AUTODISARM when we were already on it.
- *
- * This improves reliability: if user state gets corrupted such that
- * the stack pointer points very close to the end of the signal stack,
- * then this check will enable the signal to be handled anyway.
- */
- if (current->sas_ss_flags & SS_AUTODISARM)
- return 0;
-
-#ifdef CONFIG_STACK_GROWSUP
- return sp >= current->sas_ss_sp &&
- sp - current->sas_ss_sp < current->sas_ss_size;
-#else
- return sp > current->sas_ss_sp &&
- sp - current->sas_ss_sp <= current->sas_ss_size;
-#endif
-}
-
-static inline int sas_ss_flags(unsigned long sp)
-{
- if (!current->sas_ss_size)
- return SS_DISABLE;
-
- return on_sig_stack(sp) ? SS_ONSTACK : 0;
-}
-
-static inline void sas_ss_reset(struct task_struct *p)
-{
- p->sas_ss_sp = 0;
- p->sas_ss_size = 0;
- p->sas_ss_flags = SS_DISABLE;
-}
-
-static inline unsigned long sigsp(unsigned long sp, struct ksignal *ksig)
-{
- if (unlikely((ksig->ka.sa.sa_flags & SA_ONSTACK)) && ! sas_ss_flags(sp))
-#ifdef CONFIG_STACK_GROWSUP
- return current->sas_ss_sp;
-#else
- return current->sas_ss_sp + current->sas_ss_size;
-#endif
- return sp;
-}
-
-/*
- * Routines for handling mm_structs
- */
-extern struct mm_struct * mm_alloc(void);
-
-/**
- * mmgrab() - Pin a &struct mm_struct.
- * @mm: The &struct mm_struct to pin.
- *
- * Make sure that @mm will not get freed even after the owning task
- * exits. This doesn't guarantee that the associated address space
- * will still exist later on and mmget_not_zero() has to be used before
- * accessing it.
- *
- * This is a preferred way to to pin @mm for a longer/unbounded amount
- * of time.
- *
- * Use mmdrop() to release the reference acquired by mmgrab().
- *
- * See also <Documentation/vm/active_mm.txt> for an in-depth explanation
- * of &mm_struct.mm_count vs &mm_struct.mm_users.
- */
-static inline void mmgrab(struct mm_struct *mm)
-{
- atomic_inc(&mm->mm_count);
-}
-
-/* mmdrop drops the mm and the page tables */
-extern void __mmdrop(struct mm_struct *);
-static inline void mmdrop(struct mm_struct *mm)
-{
- if (unlikely(atomic_dec_and_test(&mm->mm_count)))
- __mmdrop(mm);
-}
-
-static inline void mmdrop_async_fn(struct work_struct *work)
-{
- struct mm_struct *mm = container_of(work, struct mm_struct, async_put_work);
- __mmdrop(mm);
-}
-
-static inline void mmdrop_async(struct mm_struct *mm)
-{
- if (unlikely(atomic_dec_and_test(&mm->mm_count))) {
- INIT_WORK(&mm->async_put_work, mmdrop_async_fn);
- schedule_work(&mm->async_put_work);
- }
-}
-
-/**
- * mmget() - Pin the address space associated with a &struct mm_struct.
- * @mm: The address space to pin.
- *
- * Make sure that the address space of the given &struct mm_struct doesn't
- * go away. This does not protect against parts of the address space being
- * modified or freed, however.
- *
- * Never use this function to pin this address space for an
- * unbounded/indefinite amount of time.
- *
- * Use mmput() to release the reference acquired by mmget().
- *
- * See also <Documentation/vm/active_mm.txt> for an in-depth explanation
- * of &mm_struct.mm_count vs &mm_struct.mm_users.
- */
-static inline void mmget(struct mm_struct *mm)
-{
- atomic_inc(&mm->mm_users);
-}
-
-static inline bool mmget_not_zero(struct mm_struct *mm)
-{
- return atomic_inc_not_zero(&mm->mm_users);
-}
-
-/* mmput gets rid of the mappings and all user-space */
-extern void mmput(struct mm_struct *);
-#ifdef CONFIG_MMU
-/* same as above but performs the slow path from the async context. Can
- * be called from the atomic context as well
- */
-extern void mmput_async(struct mm_struct *);
-#endif
-
-/* Grab a reference to a task's mm, if it is not already going away */
-extern struct mm_struct *get_task_mm(struct task_struct *task);
-/*
- * Grab a reference to a task's mm, if it is not already going away
- * and ptrace_may_access with the mode parameter passed to it
- * succeeds.
- */
-extern struct mm_struct *mm_access(struct task_struct *task, unsigned int mode);
-/* Remove the current tasks stale references to the old mm_struct */
-extern void mm_release(struct task_struct *, struct mm_struct *);
-
-#ifdef CONFIG_HAVE_COPY_THREAD_TLS
-extern int copy_thread_tls(unsigned long, unsigned long, unsigned long,
- struct task_struct *, unsigned long);
-#else
-extern int copy_thread(unsigned long, unsigned long, unsigned long,
- struct task_struct *);
-
-/* Architectures that haven't opted into copy_thread_tls get the tls argument
- * via pt_regs, so ignore the tls argument passed via C. */
-static inline int copy_thread_tls(
- unsigned long clone_flags, unsigned long sp, unsigned long arg,
- struct task_struct *p, unsigned long tls)
-{
- return copy_thread(clone_flags, sp, arg, p);
-}
-#endif
-extern void flush_thread(void);
-
-#ifdef CONFIG_HAVE_EXIT_THREAD
-extern void exit_thread(struct task_struct *tsk);
-#else
-static inline void exit_thread(struct task_struct *tsk)
-{
-}
-#endif
-
-extern void exit_files(struct task_struct *);
-extern void __cleanup_sighand(struct sighand_struct *);
-
-extern void exit_itimers(struct signal_struct *);
-extern void flush_itimer_signals(void);
-
-extern void do_group_exit(int);
-
-extern int do_execve(struct filename *,
- const char __user * const __user *,
- const char __user * const __user *);
-extern int do_execveat(int, struct filename *,
- const char __user * const __user *,
- const char __user * const __user *,
- int);
-extern long _do_fork(unsigned long, unsigned long, unsigned long, int __user *, int __user *, unsigned long);
-extern long do_fork(unsigned long, unsigned long, unsigned long, int __user *, int __user *);
-struct task_struct *fork_idle(int);
-extern pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
extern void __set_task_comm(struct task_struct *tsk, const char *from, bool exec);
static inline void set_task_comm(struct task_struct *tsk, const char *from)
}
#endif
-#define tasklist_empty() \
- list_empty(&init_task.tasks)
-
-#define next_task(p) \
- list_entry_rcu((p)->tasks.next, struct task_struct, tasks)
-
-#define for_each_process(p) \
- for (p = &init_task ; (p = next_task(p)) != &init_task ; )
-
-extern bool current_is_single_threaded(void);
-
-/*
- * Careful: do_each_thread/while_each_thread is a double loop so
- * 'break' will not work as expected - use goto instead.
- */
-#define do_each_thread(g, t) \
- for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do
-
-#define while_each_thread(g, t) \
- while ((t = next_thread(t)) != g)
-
-#define __for_each_thread(signal, t) \
- list_for_each_entry_rcu(t, &(signal)->thread_head, thread_node)
-
-#define for_each_thread(p, t) \
- __for_each_thread((p)->signal, t)
-
-/* Careful: this is a double loop, 'break' won't work as expected. */
-#define for_each_process_thread(p, t) \
- for_each_process(p) for_each_thread(p, t)
-
-typedef int (*proc_visitor)(struct task_struct *p, void *data);
-void walk_process_tree(struct task_struct *top, proc_visitor, void *);
-
-static inline int get_nr_threads(struct task_struct *tsk)
-{
- return tsk->signal->nr_threads;
-}
-
-static inline bool thread_group_leader(struct task_struct *p)
-{
- return p->exit_signal >= 0;
-}
-
-/* Do to the insanities of de_thread it is possible for a process
- * to have the pid of the thread group leader without actually being
- * the thread group leader. For iteration through the pids in proc
- * all we care about is that we have a task with the appropriate
- * pid, we don't actually care if we have the right task.
- */
-static inline bool has_group_leader_pid(struct task_struct *p)
-{
- return task_pid(p) == p->signal->leader_pid;
-}
-
-static inline
-bool same_thread_group(struct task_struct *p1, struct task_struct *p2)
-{
- return p1->signal == p2->signal;
-}
-
-static inline struct task_struct *next_thread(const struct task_struct *p)
-{
- return list_entry_rcu(p->thread_group.next,
- struct task_struct, thread_group);
-}
-
-static inline int thread_group_empty(struct task_struct *p)
-{
- return list_empty(&p->thread_group);
-}
-
-#define delay_group_leader(p) \
- (thread_group_leader(p) && !thread_group_empty(p))
-
-/*
- * Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring
- * subscriptions and synchronises with wait4(). Also used in procfs. Also
- * pins the final release of task.io_context. Also protects ->cpuset and
- * ->cgroup.subsys[]. And ->vfork_done.
- *
- * Nests both inside and outside of read_lock(&tasklist_lock).
- * It must not be nested with write_lock_irq(&tasklist_lock),
- * neither inside nor outside.
- */
-static inline void task_lock(struct task_struct *p)
-{
- spin_lock(&p->alloc_lock);
-}
-
-static inline void task_unlock(struct task_struct *p)
-{
- spin_unlock(&p->alloc_lock);
-}
-
-extern struct sighand_struct *__lock_task_sighand(struct task_struct *tsk,
- unsigned long *flags);
-
-static inline struct sighand_struct *lock_task_sighand(struct task_struct *tsk,
- unsigned long *flags)
-{
- struct sighand_struct *ret;
-
- ret = __lock_task_sighand(tsk, flags);
- (void)__cond_lock(&tsk->sighand->siglock, ret);
- return ret;
-}
-
-static inline void unlock_task_sighand(struct task_struct *tsk,
- unsigned long *flags)
-{
- spin_unlock_irqrestore(&tsk->sighand->siglock, *flags);
-}
-
-#ifdef CONFIG_THREAD_INFO_IN_TASK
-
-static inline struct thread_info *task_thread_info(struct task_struct *task)
-{
- return &task->thread_info;
-}
-
-/*
- * When accessing the stack of a non-current task that might exit, use
- * try_get_task_stack() instead. task_stack_page will return a pointer
- * that could get freed out from under you.
- */
-static inline void *task_stack_page(const struct task_struct *task)
-{
- return task->stack;
-}
-
-#define setup_thread_stack(new,old) do { } while(0)
-
-static inline unsigned long *end_of_stack(const struct task_struct *task)
-{
- return task->stack;
-}
-
-#elif !defined(__HAVE_THREAD_FUNCTIONS)
-
-#define task_thread_info(task) ((struct thread_info *)(task)->stack)
-#define task_stack_page(task) ((void *)(task)->stack)
-
-static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org)
-{
- *task_thread_info(p) = *task_thread_info(org);
- task_thread_info(p)->task = p;
-}
-
-/*
- * Return the address of the last usable long on the stack.
- *
- * When the stack grows down, this is just above the thread
- * info struct. Going any lower will corrupt the threadinfo.
- *
- * When the stack grows up, this is the highest address.
- * Beyond that position, we corrupt data on the next page.
- */
-static inline unsigned long *end_of_stack(struct task_struct *p)
-{
-#ifdef CONFIG_STACK_GROWSUP
- return (unsigned long *)((unsigned long)task_thread_info(p) + THREAD_SIZE) - 1;
-#else
- return (unsigned long *)(task_thread_info(p) + 1);
-#endif
-}
-
-#endif
-
-#ifdef CONFIG_THREAD_INFO_IN_TASK
-static inline void *try_get_task_stack(struct task_struct *tsk)
-{
- return atomic_inc_not_zero(&tsk->stack_refcount) ?
- task_stack_page(tsk) : NULL;
-}
-
-extern void put_task_stack(struct task_struct *tsk);
-#else
-static inline void *try_get_task_stack(struct task_struct *tsk)
-{
- return task_stack_page(tsk);
-}
-
-static inline void put_task_stack(struct task_struct *tsk) {}
-#endif
-
-#define task_stack_end_corrupted(task) \
- (*(end_of_stack(task)) != STACK_END_MAGIC)
-
-static inline int object_is_on_stack(void *obj)
-{
- void *stack = task_stack_page(current);
-
- return (obj >= stack) && (obj < (stack + THREAD_SIZE));
-}
-
-extern void thread_stack_cache_init(void);
-
-#ifdef CONFIG_DEBUG_STACK_USAGE
-static inline unsigned long stack_not_used(struct task_struct *p)
-{
- unsigned long *n = end_of_stack(p);
-
- do { /* Skip over canary */
-# ifdef CONFIG_STACK_GROWSUP
- n--;
-# else
- n++;
-# endif
- } while (!*n);
-
-# ifdef CONFIG_STACK_GROWSUP
- return (unsigned long)end_of_stack(p) - (unsigned long)n;
-# else
- return (unsigned long)n - (unsigned long)end_of_stack(p);
-# endif
-}
-#endif
-extern void set_task_stack_end_magic(struct task_struct *tsk);
-
/* set thread flags in other task's structures
* - see asm/thread_info.h for TIF_xxxx flags available
*/
return unlikely(test_tsk_thread_flag(tsk,TIF_NEED_RESCHED));
}
-static inline int restart_syscall(void)
-{
- set_tsk_thread_flag(current, TIF_SIGPENDING);
- return -ERESTARTNOINTR;
-}
-
-static inline int signal_pending(struct task_struct *p)
-{
- return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));
-}
-
-static inline int __fatal_signal_pending(struct task_struct *p)
-{
- return unlikely(sigismember(&p->pending.signal, SIGKILL));
-}
-
-static inline int fatal_signal_pending(struct task_struct *p)
-{
- return signal_pending(p) && __fatal_signal_pending(p);
-}
-
-static inline int signal_pending_state(long state, struct task_struct *p)
-{
- if (!(state & (TASK_INTERRUPTIBLE | TASK_WAKEKILL)))
- return 0;
- if (!signal_pending(p))
- return 0;
-
- return (state & TASK_INTERRUPTIBLE) || __fatal_signal_pending(p);
-}
-
/*
* cond_resched() and cond_resched_lock(): latency reduction via
* explicit rescheduling in places that are safe. The return
return unlikely(tif_need_resched());
}
-/*
- * Thread group CPU time accounting.
- */
-void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times);
-void thread_group_cputimer(struct task_struct *tsk, struct task_cputime *times);
-
-/*
- * Reevaluate whether the task has signals pending delivery.
- * Wake the task if so.
- * This is required every time the blocked sigset_t changes.
- * callers must hold sighand->siglock.
- */
-extern void recalc_sigpending_and_wake(struct task_struct *t);
-extern void recalc_sigpending(void);
-
-extern void signal_wake_up_state(struct task_struct *t, unsigned int state);
-
-static inline void signal_wake_up(struct task_struct *t, bool resume)
-{
- signal_wake_up_state(t, resume ? TASK_WAKEKILL : 0);
-}
-static inline void ptrace_signal_wake_up(struct task_struct *t, bool resume)
-{
- signal_wake_up_state(t, resume ? __TASK_TRACED : 0);
-}
-
/*
* Wrappers for p->thread_info->cpu access. No-op on UP.
*/
extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask);
extern long sched_getaffinity(pid_t pid, struct cpumask *mask);
-#ifdef CONFIG_CGROUP_SCHED
-extern struct task_group root_task_group;
-#endif /* CONFIG_CGROUP_SCHED */
-
extern int task_can_switch_user(struct user_struct *up,
struct task_struct *tsk);
-#ifdef CONFIG_TASK_XACCT
-static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
-{
- tsk->ioac.rchar += amt;
-}
-
-static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
-{
- tsk->ioac.wchar += amt;
-}
-
-static inline void inc_syscr(struct task_struct *tsk)
-{
- tsk->ioac.syscr++;
-}
-
-static inline void inc_syscw(struct task_struct *tsk)
-{
- tsk->ioac.syscw++;
-}
-#else
-static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
-{
-}
-
-static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
-{
-}
-
-static inline void inc_syscr(struct task_struct *tsk)
-{
-}
-
-static inline void inc_syscw(struct task_struct *tsk)
-{
-}
-#endif
-
#ifndef TASK_SIZE_OF
#define TASK_SIZE_OF(tsk) TASK_SIZE
#endif
-#ifdef CONFIG_MEMCG
-extern void mm_update_next_owner(struct mm_struct *mm);
-#else
-static inline void mm_update_next_owner(struct mm_struct *mm)
-{
-}
-#endif /* CONFIG_MEMCG */
-
-static inline unsigned long task_rlimit(const struct task_struct *tsk,
- unsigned int limit)
-{
- return READ_ONCE(tsk->signal->rlim[limit].rlim_cur);
-}
-
-static inline unsigned long task_rlimit_max(const struct task_struct *tsk,
- unsigned int limit)
-{
- return READ_ONCE(tsk->signal->rlim[limit].rlim_max);
-}
-
-static inline unsigned long rlimit(unsigned int limit)
-{
- return task_rlimit(current, limit);
-}
-
-static inline unsigned long rlimit_max(unsigned int limit)
-{
- return task_rlimit_max(current, limit);
-}
-
-#define SCHED_CPUFREQ_RT (1U << 0)
-#define SCHED_CPUFREQ_DL (1U << 1)
-#define SCHED_CPUFREQ_IOWAIT (1U << 2)
-
-#define SCHED_CPUFREQ_RT_DL (SCHED_CPUFREQ_RT | SCHED_CPUFREQ_DL)
-
-#ifdef CONFIG_CPU_FREQ
-struct update_util_data {
- void (*func)(struct update_util_data *data, u64 time, unsigned int flags);
-};
-
-void cpufreq_add_update_util_hook(int cpu, struct update_util_data *data,
- void (*func)(struct update_util_data *data, u64 time,
- unsigned int flags));
-void cpufreq_remove_update_util_hook(int cpu);
-#endif /* CONFIG_CPU_FREQ */
-
#endif
projects / karo-tx-linux.git / blobdiff