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#ifndef _LINUX_SCHED_H

#define _LINUX_SCHED_H

#include <asm/param.h>  /* for HZ */

#include <linux/config.h>

#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/rbtree.h>

#include <linux/thread_info.h>

#include <linux/cpumask.h>

#include <asm/system.h>

#include <asm/semaphore.h>

#include <asm/page.h>

#include <asm/ptrace.h>

#include <asm/mmu.h>

#include <linux/smp.h>

#include <linux/sem.h>

#include <linux/signal.h>

#include <linux/securebits.h>

#include <linux/fs_struct.h>

#include <linux/compiler.h>

#include <linux/completion.h>

#include <linux/pid.h>

#include <linux/percpu.h>

struct exec_domain;

/*

 * cloning flags:

 */

#define CSIGNAL         0x000000ff      /* signal mask to be sent at exit */

#define CLONE_VM        0x00000100      /* set if VM shared between processes */

#define CLONE_FS        0x00000200      /* set if fs info shared between processes */

#define CLONE_FILES     0x00000400      /* set if open files shared between processes */

#define CLONE_SIGHAND   0x00000800      /* set if signal handlers and blocked signals shared */

#define CLONE_IDLETASK  0x00001000      /* set if new pid should be 0 (kernel only)*/

#define CLONE_PTRACE    0x00002000      /* set if we want to let tracing continue on the child too */

#define CLONE_VFORK     0x00004000      /* set if the parent wants the child to wake it up on mm_release */

#define CLONE_PARENT    0x00008000      /* set if we want to have the same parent as the cloner */

#define CLONE_THREAD    0x00010000      /* Same thread group? */

#define CLONE_NEWNS     0x00020000      /* New namespace group? */

#define CLONE_SYSVSEM   0x00040000      /* share system V SEM_UNDO semantics */

#define CLONE_SETTLS    0x00080000      /* create a new TLS for the child */

#define CLONE_PARENT_SETTID     0x00100000      /* set the TID in the parent */

#define CLONE_CHILD_CLEARTID    0x00200000      /* clear the TID in the child */

#define CLONE_DETACHED          0x00400000      /* Not used - CLONE_THREAD implies detached uniquely */

#define CLONE_UNTRACED          0x00800000      /* set if the tracing process can't force CLONE_PTRACE on this clone */

#define CLONE_CHILD_SETTID      0x01000000      /* set the TID in the child */

#define CLONE_STOPPED           0x02000000      /* Start in stopped state */

/*

 * List of flags we want to share for kernel threads,

 * if only because they are not used by them anyway.

 */

#define CLONE_KERNEL    (CLONE_FS | CLONE_FILES | CLONE_SIGHAND)

/*

 * 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 */

#define FSHIFT          11              /* nr of bits of precision */

#define FIXED_1         (1<<FSHIFT)     /* 1.0 as fixed-point */

#define LOAD_FREQ       (5*HZ)          /* 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;

#define CT_TO_SECS(x)   ((x) / HZ)

#define CT_TO_USECS(x)  (((x) % HZ) * 1000000/HZ)

extern int nr_threads;

extern int last_pid;

DECLARE_PER_CPU(unsigned long, process_counts);

extern int nr_processes(void);

extern unsigned long nr_running(void);

extern unsigned long nr_uninterruptible(void);

extern unsigned long nr_iowait(void);

#include <linux/time.h>

#include <linux/param.h>

#include <linux/resource.h>

#include <linux/timer.h>

#include <asm/processor.h>

#define TASK_RUNNING            0

#define TASK_INTERRUPTIBLE      1

#define TASK_UNINTERRUPTIBLE    2

#define TASK_STOPPED            4

#define TASK_ZOMBIE             8

#define TASK_DEAD               16

#define __set_task_state(tsk, state_value)              \

        do { (tsk)->state = (state_value); } while (0)

#define set_task_state(tsk, state_value)                \

        set_mb((tsk)->state, (state_value))

#define __set_current_state(state_value)                        \

        do { current->state = (state_value); } while (0)

#define set_current_state(state_value)          \

        set_mb(current->state, (state_value))

/*

 * Scheduling policies

 */

#define SCHED_NORMAL            0

#define SCHED_FIFO              1

#define SCHED_RR                2

struct sched_param {

        int sched_priority;

};

#ifdef __KERNEL__

#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;

typedef struct task_struct task_t;

extern void sched_init(void);

extern void init_idle(task_t *idle, int cpu);

extern void show_state(void);

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);

void io_schedule(void);

long io_schedule_timeout(long timeout);

extern void cpu_init (void);

extern void trap_init(void);

extern void update_process_times(int user);

extern void update_one_process(struct task_struct *p, unsigned long user,

                               unsigned long system, int cpu);

extern void scheduler_tick(int user_tick, int system);

extern unsigned long cache_decay_ticks;

#define MAX_SCHEDULE_TIMEOUT    LONG_MAX

extern signed long FASTCALL(schedule_timeout(signed long timeout));

asmlinkage void schedule(void);

struct namespace;

/* Maximum number of active map areas.. This is a random (large) number */

#define MAX_MAP_COUNT   (65536)

#include <linux/aio.h>

struct mm_struct {

        struct vm_area_struct * mmap;           /* list of VMAs */

        struct rb_root mm_rb;

        struct vm_area_struct * mmap_cache;     /* last find_vma result */

        unsigned long free_area_cache;          /* first hole */

        pgd_t * pgd;

        atomic_t mm_users;                      /* How many users with user space? */

        atomic_t mm_count;                      /* How many references to "struct mm_struct" (users count as 1) */

        int map_count;                          /* number of VMAs */

        struct rw_semaphore mmap_sem;

        spinlock_t page_table_lock;             /* Protects task page tables and mm->rss */

        struct list_head mmlist;                /* List of all active mm's.  These are globally strung

                                                 * together off init_mm.mmlist, and are protected

                                                 * by mmlist_lock

                                                 */

        unsigned long start_code, end_code, start_data, end_data;

        unsigned long start_brk, brk, start_stack;

        unsigned long arg_start, arg_end, env_start, env_end;

        unsigned long rss, total_vm, locked_vm;

        unsigned long def_flags;

        cpumask_t cpu_vm_mask;

        unsigned long swap_address;

        unsigned long saved_auxv[40]; /* for /proc/PID/auxv */

        unsigned dumpable:1;

#ifdef CONFIG_HUGETLB_PAGE

        int used_hugetlb;

#endif

        /* Architecture-specific MM context */

        mm_context_t context;

        /* coredumping support */

        int core_waiters;

        struct completion *core_startup_done, core_done;

        /* aio bits */

        rwlock_t                ioctx_list_lock;

        struct kioctx           *ioctx_list;

        struct kioctx           default_kioctx;

};

extern int mmlist_nr;

struct sighand_struct {

        atomic_t                count;

        struct k_sigaction      action[_NSIG];

        spinlock_t              siglock;

};

/*

 * NOTE! "signal_struct" does not have it's 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                count;

        /* current thread group signal load-balancing target: */

        task_t                  *curr_target;

        /* shared signal handling: */

        struct sigpending       shared_pending;

        /* thread group exit support */

        int                     group_exit;

        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.

         */

        struct task_struct      *group_exit_task;

        int                     notify_count;

        /* thread group stop support, overloads group_exit_code too */

        int                     group_stop_count;

};

/*

 * Priority of a process goes from 0..MAX_PRIO-1, valid RT

 * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL tasks are

 * in the range MAX_RT_PRIO..MAX_PRIO-1. Priority values

 * are inverted: lower p->prio value means higher priority.

 *

 * The MAX_RT_USER_PRIO value allows the actual maximum

 * RT priority to be separate from the value exported to

 * user-space.  This allows kernel threads to set their

 * priority to a value higher than any user task. Note:

 * MAX_RT_PRIO must not be smaller than MAX_USER_RT_PRIO.

 */

#define MAX_USER_RT_PRIO        100

#define MAX_RT_PRIO             MAX_USER_RT_PRIO

#define MAX_PRIO                (MAX_RT_PRIO + 40)

#define rt_task(p)              ((p)->prio < MAX_RT_PRIO)

/*

 * 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 files;         /* How many open files does this user have? */

        /* Hash table maintenance information */

        struct list_head uidhash_list;

        uid_t uid;

};

extern struct user_struct *find_user(uid_t);

extern struct user_struct root_user;

#define INIT_USER (&root_user)

typedef struct prio_array prio_array_t;

struct backing_dev_info;

struct reclaim_state;

/* POSIX.1b interval timer structure. */

struct k_itimer {

        struct list_head list;           /* free/ allocate list */

        spinlock_t it_lock;

        clockid_t it_clock;             /* which timer type */

        timer_t it_id;                  /* timer id */

        int it_overrun;                 /* overrun on pending signal  */

        int it_overrun_last;             /* overrun on last delivered signal */

        int it_requeue_pending;          /* waiting to requeue this timer */

        int it_sigev_notify;             /* notify word of sigevent struct */

        int it_sigev_signo;              /* signo word of sigevent struct */

        sigval_t it_sigev_value;         /* value word of sigevent struct */

        unsigned long it_incr;          /* interval specified in jiffies */

        struct task_struct *it_process; /* process to send signal to */

        struct timer_list it_timer;

        struct sigqueue *sigq;          /* signal queue entry. */

};

struct io_context;                      /* See blkdev.h */

void exit_io_context(void);

struct task_struct {

        volatile long state;    /* -1 unrunnable, 0 runnable, >0 stopped */

        struct thread_info *thread_info;

        atomic_t usage;

        unsigned long flags;    /* per process flags, defined below */

        unsigned long ptrace;

        int lock_depth;         /* Lock depth */

        int prio, static_prio;

        struct list_head run_list;

        prio_array_t *array;

        unsigned long sleep_avg;

        long interactive_credit;

        unsigned long long timestamp;

        int activated;

        unsigned long policy;

        cpumask_t cpus_allowed;

        unsigned int time_slice, first_time_slice;

        struct list_head tasks;

        struct list_head ptrace_children;

        struct list_head ptrace_list;

        struct mm_struct *mm, *active_mm;

/* task state */

        struct linux_binfmt *binfmt;

        int exit_code, exit_signal;

        int pdeath_signal;  /*  The signal sent when the parent dies  */

        /* ??? */

        unsigned long personality;

        int did_exec:1;

        pid_t pid;

        pid_t __pgrp;           /* Accessed via process_group() */

        pid_t tty_old_pgrp;

        pid_t session;

        pid_t tgid;

        /* boolean value for session group leader */

        int leader;

        /*

         * pointers to (original) parent process, youngest child, younger sibling,

         * older sibling, respectively.  (p->father can be replaced with

         * p->parent->pid)

         */

        struct task_struct *real_parent; /* real parent process (when being debugged) */

        struct task_struct *parent;     /* parent process */

        struct list_head children;      /* list of my children */

        struct list_head sibling;       /* linkage in my parent's children list */

        struct task_struct *group_leader;       /* threadgroup leader */

        /* PID/PID hash table linkage. */

        struct pid_link pids[PIDTYPE_MAX];

        wait_queue_head_t wait_chldexit;        /* for wait4() */

        struct completion *vfork_done;          /* for vfork() */

        int __user *set_child_tid;              /* CLONE_CHILD_SETTID */

        int __user *clear_child_tid;            /* CLONE_CHILD_CLEARTID */

        unsigned long rt_priority;

        unsigned long it_real_value, it_prof_value, it_virt_value;

        unsigned long it_real_incr, it_prof_incr, it_virt_incr;

        struct timer_list real_timer;

        struct list_head posix_timers; /* POSIX.1b Interval Timers */

        unsigned long utime, stime, cutime, cstime;

        unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw; /* context switch counts */

        u64 start_time;

/* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */

        unsigned long min_flt, maj_flt, nswap, cmin_flt, cmaj_flt, cnswap;

/* process credentials */

        uid_t uid,euid,suid,fsuid;

        gid_t gid,egid,sgid,fsgid;

        int ngroups;

        gid_t   groups[NGROUPS];

        kernel_cap_t   cap_effective, cap_inheritable, cap_permitted;

        int keep_capabilities:1;

        struct user_struct *user;

/* limits */

        struct rlimit rlim[RLIM_NLIMITS];

        unsigned short used_math;

        char comm[16];

/* file system info */

        int link_count, total_link_count;

        struct tty_struct *tty; /* NULL if no tty */

/* ipc stuff */

        struct sysv_sem sysvsem;

/* CPU-specific state of this task */

        struct thread_struct thread;

/* filesystem information */

        struct fs_struct *fs;

/* open file information */

        struct files_struct *files;

/* namespace */

        struct namespace *namespace;

/* signal handlers */

        struct signal_struct *signal;

        struct sighand_struct *sighand;

        sigset_t blocked, real_blocked;

        struct sigpending pending;

        unsigned long sas_ss_sp;

        size_t sas_ss_size;

        int (*notifier)(void *priv);

        void *notifier_data;

        sigset_t *notifier_mask;

        void *security;

/* Thread group tracking */

        u32 parent_exec_id;

        u32 self_exec_id;

/* Protection of (de-)allocation: mm, files, fs, tty */

        spinlock_t alloc_lock;

/* Protection of proc_dentry: nesting proc_lock, dcache_lock, write_lock_irq(&tasklist_lock); */

        spinlock_t proc_lock;

/* context-switch lock */

        spinlock_t switch_lock;

/* journalling filesystem info */

        void *journal_info;

/* VM state */

        struct reclaim_state *reclaim_state;

        struct dentry *proc_dentry;

        struct backing_dev_info *backing_dev_info;

        struct io_context *io_context;

        unsigned long ptrace_message;

        siginfo_t *last_siginfo; /* For ptrace use.  */

};

static inline pid_t process_group(struct task_struct *tsk)

{

        return tsk->group_leader->__pgrp;

}

extern void __put_task_struct(struct task_struct *tsk);

#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)

#define put_task_struct(tsk) \

do { if (atomic_dec_and_test(&(tsk)->usage)) __put_task_struct(tsk); } while(0)

/*

 * Per process flags

 */

#define PF_ALIGNWARN    0x00000001      /* Print alignment warning msgs */

                                        /* Not implemented yet, only for 486*/

#define PF_STARTING     0x00000002      /* being created */

#define PF_EXITING      0x00000004      /* getting shut down */

#define PF_DEAD         0x00000008      /* Dead */

#define PF_FORKNOEXEC   0x00000040      /* forked but didn't exec */

#define PF_SUPERPRIV    0x00000100      /* used super-user privileges */

#define PF_DUMPCORE     0x00000200      /* dumped core */

#define PF_SIGNALED     0x00000400      /* killed by a signal */

#define PF_MEMALLOC     0x00000800      /* Allocating memory */

#define PF_MEMDIE       0x00001000      /* Killed for out-of-memory */

#define PF_FLUSHER      0x00002000      /* responsible for disk writeback */

#define PF_FREEZE       0x00004000      /* this task should be frozen for suspend */

#define PF_IOTHREAD     0x00008000      /* this thread is needed for doing I/O to swap */

#define PF_FROZEN       0x00010000      /* frozen for system suspend */

#define PF_FSTRANS      0x00020000      /* inside a filesystem transaction */

#define PF_KSWAPD       0x00040000      /* I am kswapd */

#define PF_SWAPOFF      0x00080000      /* I am in swapoff */

#define PF_LESS_THROTTLE 0x00100000     /* Throttle me less: I clean memory */

#define PF_SYNCWRITE    0x00200000      /* I am doing a sync write */

#ifdef CONFIG_SMP

extern int set_cpus_allowed(task_t *p, cpumask_t new_mask);

#else

static inline int set_cpus_allowed(task_t *p, cpumask_t new_mask)

{

        return 0;

}

#endif

extern unsigned long long sched_clock(void);

#ifdef CONFIG_NUMA

extern void sched_balance_exec(void);

extern void node_nr_running_init(void);

#else

#define sched_balance_exec()   {}

#define node_nr_running_init() {}

#endif

extern void set_user_nice(task_t *p, long nice);

extern int task_prio(task_t *p);

extern int task_nice(task_t *p);

extern int task_curr(task_t *p);

extern int idle_cpu(int cpu);

void yield(void);

/*

 * The default (Linux) execution domain.

 */

extern struct exec_domain       default_exec_domain;

#ifndef INIT_THREAD_SIZE

# define INIT_THREAD_SIZE       2048*sizeof(long)

#endif

union thread_union {

        struct thread_info thread_info;

        unsigned long stack[INIT_THREAD_SIZE/sizeof(long)];

};

#ifndef __HAVE_ARCH_KSTACK_END

static inline int kstack_end(void *addr)

{

        /* Reliable end of stack detection:

         * Some APM bios versions misalign the stack

         */

        return !(((unsigned long)addr+sizeof(void*)-1) & (THREAD_SIZE-sizeof(void*)));

}

#endif

extern union thread_union init_thread_union;

extern struct task_struct init_task;

extern struct   mm_struct init_mm;

extern struct task_struct *find_task_by_pid(int pid);

extern void set_special_pids(pid_t session, pid_t pgrp);

extern void __set_special_pids(pid_t session, pid_t pgrp);

/* per-UID process charging. */

extern struct user_struct * alloc_uid(uid_t);

extern void free_uid(struct user_struct *);

extern void switch_uid(struct user_struct *);

#include <asm/current.h>

extern unsigned long itimer_ticks;

extern unsigned long itimer_next;

extern void do_timer(struct pt_regs *);

extern int FASTCALL(wake_up_state(struct task_struct * tsk, unsigned int state));

extern int FASTCALL(wake_up_process(struct task_struct * tsk));

#ifdef CONFIG_SMP

 extern void FASTCALL(kick_process(struct task_struct * tsk));

#else

 static inline void kick_process(struct task_struct *tsk) { }

#endif

extern void FASTCALL(wake_up_forked_process(struct task_struct * tsk));

extern void FASTCALL(sched_exit(task_t * p));

asmlinkage long sys_wait4(pid_t pid,unsigned int * stat_addr, int options, struct rusage * ru);

extern int in_group_p(gid_t);

extern int in_egroup_p(gid_t);

extern void proc_caches_init(void);

extern void flush_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 dequeue_signal_lock(struct task_struct *tsk, sigset_t *mask, siginfo_t *info)

{

        unsigned long flags;

        int ret;

        spin_lock_irqsave(&tsk->sighand->siglock, flags);

        ret = dequeue_signal(tsk, mask, info);

        spin_unlock_irqrestore(&tsk->sighand->siglock, flags);

        return ret;

}      

extern void block_all_signals(int (*notifier)(void *priv), void *priv,

                              sigset_t *mask);

extern void unblock_all_signals(void);

extern void release_task(struct task_struct * p);

extern int send_sig_info(int, struct siginfo *, struct task_struct *);

extern int send_group_sig_info(int, struct siginfo *, struct task_struct *);

extern int force_sig_info(int, struct siginfo *, struct task_struct *);

extern int __kill_pg_info(int sig, struct siginfo *info, pid_t pgrp);

extern int kill_pg_info(int, struct siginfo *, pid_t);

extern int kill_sl_info(int, struct siginfo *, pid_t);

extern int kill_proc_info(int, struct siginfo *, pid_t);

extern void notify_parent(struct task_struct *, int);

extern void do_notify_parent(struct task_struct *, int);

extern void force_sig(int, struct task_struct *);

extern void force_sig_specific(int, struct task_struct *);

extern int send_sig(int, struct task_struct *, int);

extern void zap_other_threads(struct task_struct *p);

extern int kill_pg(pid_t, int, int);

extern int kill_sl(pid_t, int, int);

extern int kill_proc(pid_t, int, int);

extern struct sigqueue *sigqueue_alloc(void);

extern void sigqueue_free(struct sigqueue *);

extern int send_sigqueue(int, struct sigqueue *,  struct task_struct *);

extern int send_group_sigqueue(int, struct sigqueue *,  struct task_struct *);

extern int do_sigaction(int, const struct k_sigaction *, struct k_sigaction *);

extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long);

/* 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)

{

        return (sp - current->sas_ss_sp < current->sas_ss_size);

}

static inline int sas_ss_flags(unsigned long sp)

{

        return (current->sas_ss_size == 0 ? SS_DISABLE

                : on_sig_stack(sp) ? SS_ONSTACK : 0);

}

#ifdef CONFIG_SECURITY

/* code is in security.c */

extern int capable(int cap);

#else

static inline int capable(int cap)

{

        if (cap_raised(current->cap_effective, cap)) {

                current->flags |= PF_SUPERPRIV;

                return 1;

        }

        return 0;

}

#endif

/*

 * Routines for handling mm_structs

 */

extern struct mm_struct * mm_alloc(void);

/* mmdrop drops the mm and the page tables */

extern inline void FASTCALL(__mmdrop(struct mm_struct *));

static inline void mmdrop(struct mm_struct * mm)

{

        if (atomic_dec_and_test(&mm->mm_count))

                __mmdrop(mm);

}

/* mmput gets rid of the mappings and all user-space */

extern void mmput(struct mm_struct *);

/* Grab a reference to the mm if its not already going away */

extern struct mm_struct *mmgrab(struct mm_struct *);

/* Remove the current tasks stale references to the old mm_struct */

extern void mm_release(struct task_struct *, struct mm_struct *);

extern int  copy_thread(int, unsigned long, unsigned long, unsigned long, struct task_struct *, struct pt_regs *);

extern void flush_thread(void);

extern void exit_thread(void);

extern void exit_mm(struct task_struct *);

extern void exit_files(struct task_struct *);

extern void exit_signal(struct task_struct *);

extern void __exit_signal(struct task_struct *);

extern void exit_sighand(struct task_struct *);

extern void __exit_sighand(struct task_struct *);

extern void exit_itimers(struct task_struct *);

extern NORET_TYPE void do_group_exit(int);

extern void reparent_to_init(void);

extern void daemonize(const char *, ...);

extern int allow_signal(int);

extern int disallow_signal(int);

extern task_t *child_reaper;

extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *);

extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);

extern struct task_struct * copy_process(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *);

#ifdef CONFIG_SMP

extern void wait_task_inactive(task_t * p);

#else

#define wait_task_inactive(p)   do { } while (0)

#endif

#define remove_parent(p)        list_del_init(&(p)->sibling)

#define add_parent(p, parent)   list_add_tail(&(p)->sibling,&(parent)->children)

#define REMOVE_LINKS(p) do {                                    \

        if (thread_group_leader(p))                             \

                list_del_init(&(p)->tasks);                     \

        remove_parent(p);                                       \

        } while (0)

#define SET_LINKS(p) do {                                       \

        if (thread_group_leader(p))                             \

                list_add_tail(&(p)->tasks,&init_task.tasks);    \

        add_parent(p, (p)->parent);                             \

        } while (0)

#define next_task(p)    list_entry((p)->tasks.next, struct task_struct, tasks)

#define prev_task(p)    list_entry((p)->tasks.prev, struct task_struct, tasks)

#define for_each_process(p) \

        for (p = &init_task ; (p = next_task(p)) != &init_task ; )

/*

 * 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)

extern task_t * FASTCALL(next_thread(task_t *p));

#define thread_group_leader(p)  (p->pid == p->tgid)

static inline int thread_group_empty(task_t *p)

{

        struct pid *pid = p->pids[PIDTYPE_TGID].pidptr;

        return pid->task_list.next->next == &pid->task_list;

}

#define delay_group_leader(p) \

                (thread_group_leader(p) && !thread_group_empty(p))

extern void unhash_process(struct task_struct *p);

/* Protects ->fs, ->files, ->mm, and synchronises with wait4().

 * 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);

}

/**

 * get_task_mm - acquire a reference to the task's mm

 *

 * Returns %NULL if the task has no mm. User must release

 * the mm via mmput() after use.

 */

static inline struct mm_struct * get_task_mm(struct task_struct * task)

{

        struct mm_struct * mm;

        task_lock(task);

        mm = task->mm;

        if (mm)

                mm = mmgrab(mm);

        task_unlock(task);

        return mm;

}

/* set thread flags in other task's structures

 * - see asm/thread_info.h for TIF_xxxx flags available

 */

static inline void set_tsk_thread_flag(struct task_struct *tsk, int flag)

{

        set_ti_thread_flag(tsk->thread_info,flag);

}

static inline void clear_tsk_thread_flag(struct task_struct *tsk, int flag)

{

        clear_ti_thread_flag(tsk->thread_info,flag);

}

static inline int test_and_set_tsk_thread_flag(struct task_struct *tsk, int flag)

{

        return test_and_set_ti_thread_flag(tsk->thread_info,flag);

}

static inline int test_and_clear_tsk_thread_flag(struct task_struct *tsk, int flag)

{

        return test_and_clear_ti_thread_flag(tsk->thread_info,flag);

}

static inline int test_tsk_thread_flag(struct task_struct *tsk, int flag)

{

        return test_ti_thread_flag(tsk->thread_info,flag);

}

static inline void set_tsk_need_resched(struct task_struct *tsk)

{

        set_tsk_thread_flag(tsk,TIF_NEED_RESCHED);

}

static inline void clear_tsk_need_resched(struct task_struct *tsk)

{

        clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED);

}

static inline int signal_pending(struct task_struct *p)

{

        return unlikely(test_tsk_thread_flag(p,TIF_SIGPENDING));

}

static inline int need_resched(void)

{

        return unlikely(test_thread_flag(TIF_NEED_RESCHED));