1 files changed, 76 insertions, 220 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index e692a022527b..178a8d909f14 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -127,18 +127,6 @@ extern void proc_sched_show_task(struct task_struct *p, struct seq_file *m);
 extern void proc_sched_set_task(struct task_struct *p);
 extern void
 print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq);
-#else
-static inline void
-proc_sched_show_task(struct task_struct *p, struct seq_file *m)
-{
-}
-static inline void proc_sched_set_task(struct task_struct *p)
-{
-}
-static inline void
-print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
-{
-}
 #endif
 
 /*
@@ -243,7 +231,7 @@ extern void init_idle_bootup_task(struct task_struct *idle);
 
 extern int runqueue_is_locked(int cpu);
 
-#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)
+#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);
@@ -321,13 +309,10 @@ extern signed long schedule_timeout_killable(signed long timeout);
 extern signed long schedule_timeout_uninterruptible(signed long timeout);
 asmlinkage void schedule(void);
 extern void schedule_preempt_disabled(void);
-extern int mutex_spin_on_owner(struct mutex *lock, struct task_struct *owner);
 
 struct nsproxy;
 struct user_namespace;
 
-#include <linux/aio.h>
-
 #ifdef CONFIG_MMU
 extern void arch_pick_mmap_layout(struct mm_struct *mm);
 extern unsigned long
@@ -527,7 +512,8 @@ struct signal_struct {
         unsigned int            has_child_subreaper:1;
 
         /* POSIX.1b Interval Timers */
-        struct list_head posix_timers;
+        int                     posix_timer_id;
+        struct list_head        posix_timers;
 
         /* ITIMER_REAL timer for the process */
         struct hrtimer real_timer;
@@ -571,7 +557,7 @@ struct signal_struct {
         cputime_t utime, stime, cutime, cstime;
         cputime_t gtime;
         cputime_t cgtime;
-#ifndef CONFIG_VIRT_CPU_ACCOUNTING
+#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
         struct cputime prev_cputime;
 #endif
         unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
@@ -607,6 +593,7 @@ struct signal_struct {
 #endif
 #ifdef CONFIG_AUDIT
         unsigned audit_tty;
+        unsigned audit_tty_log_passwd;
         struct tty_audit_buf *tty_audit_buf;
 #endif
 #ifdef CONFIG_CGROUPS
@@ -638,6 +625,7 @@ struct 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.
  */
@@ -769,31 +757,6 @@ enum cpu_idle_type {
 };
 
 /*
- * Increase resolution of nice-level calculations for 64-bit architectures.
- * The extra resolution improves shares distribution and load balancing of
- * low-weight task groups (eg. nice +19 on an autogroup), deeper taskgroup
- * hierarchies, especially on larger systems. This is not a user-visible change
- * and does not change the user-interface for setting shares/weights.
- *
- * We increase resolution only if we have enough bits to allow this increased
- * resolution (i.e. BITS_PER_LONG > 32). The costs for increasing resolution
- * when BITS_PER_LONG <= 32 are pretty high and the returns do not justify the
- * increased costs.
- */
-#if 0 /* BITS_PER_LONG > 32 -- currently broken: it increases power usage under light load  */
-# define SCHED_LOAD_RESOLUTION  10
-# define scale_load(w)          ((w) << SCHED_LOAD_RESOLUTION)
-# define scale_load_down(w)     ((w) >> SCHED_LOAD_RESOLUTION)
-#else
-# define SCHED_LOAD_RESOLUTION  0
-# define scale_load(w)          (w)
-# define scale_load_down(w)     (w)
-#endif
-
-#define SCHED_LOAD_SHIFT        (10 + SCHED_LOAD_RESOLUTION)
-#define SCHED_LOAD_SCALE        (1L << SCHED_LOAD_SHIFT)
-
-/*
  * Increase resolution of cpu_power calculations
  */
 #define SCHED_POWER_SHIFT       10
@@ -818,62 +781,6 @@ enum cpu_idle_type {
 
 extern int __weak arch_sd_sibiling_asym_packing(void);
 
-struct sched_group_power {
-        atomic_t ref;
-        /*
-         * CPU power of this group, SCHED_LOAD_SCALE being max power for a
-         * single CPU.
-         */
-        unsigned int power, power_orig;
-        unsigned long next_update;
-        /*
-         * Number of busy cpus in this group.
-         */
-        atomic_t nr_busy_cpus;
-
-        unsigned long cpumask[0]; /* iteration mask */
-};
-
-struct sched_group {
-        struct sched_group *next;       /* Must be a circular list */
-        atomic_t ref;
-
-        unsigned int group_weight;
-        struct sched_group_power *sgp;
-
-        /*
-         * The CPUs this group covers.
-         *
-         * NOTE: this field is variable length. (Allocated dynamically
-         * by attaching extra space to the end of the structure,
-         * depending on how many CPUs the kernel has booted up with)
-         */
-        unsigned long cpumask[0];
-};
-
-static inline struct cpumask *sched_group_cpus(struct sched_group *sg)
-{
-        return to_cpumask(sg->cpumask);
-}
-
-/*
- * cpumask masking which cpus in the group are allowed to iterate up the domain
- * tree.
- */
-static inline struct cpumask *sched_group_mask(struct sched_group *sg)
-{
-        return to_cpumask(sg->sgp->cpumask);
-}
-
-/**
- * group_first_cpu - Returns the first cpu in the cpumask of a sched_group.
- * @group: The group whose first cpu is to be returned.
- */
-static inline unsigned int group_first_cpu(struct sched_group *group)
-{
-        return cpumask_first(sched_group_cpus(group));
-}
-
 struct sched_domain_attr {
         int relax_domain_level;
 };
@@ -884,6 +791,8 @@ struct sched_domain_attr {
 
 extern int sched_domain_level_max;
 
+struct sched_group;
+
 struct sched_domain {
         /* These fields must be setup */
         struct sched_domain *parent;    /* top domain must be null terminated */
@@ -900,6 +809,8 @@ struct sched_domain {
         unsigned int wake_idx;
         unsigned int forkexec_idx;
         unsigned int smt_gain;
+
+        int nohz_idle;                  /* NOHZ IDLE status */
         int flags;                      /* See SD_* */
         int level;
 
@@ -972,18 +883,6 @@ extern void partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],
 cpumask_var_t *alloc_sched_domains(unsigned int ndoms);
 void free_sched_domains(cpumask_var_t doms[], unsigned int ndoms);
 
-/* Test a flag in parent sched domain */
-static inline int test_sd_parent(struct sched_domain *sd, int flag)
-{
-        if (sd->parent && (sd->parent->flags & flag))
-                return 1;
-
-        return 0;
-}
-
-unsigned long default_scale_freq_power(struct sched_domain *sd, int cpu);
-unsigned long default_scale_smt_power(struct sched_domain *sd, int cpu);
-
 bool cpus_share_cache(int this_cpu, int that_cpu);
 
 #else /* CONFIG_SMP */
@@ -1018,72 +917,6 @@ struct mempolicy;
 struct pipe_inode_info;
 struct uts_namespace;
 
-struct rq;
-struct sched_domain;
-
-/*
- * wake flags
- */
-#define WF_SYNC         0x01            /* waker goes to sleep after wakup */
-#define WF_FORK         0x02            /* child wakeup after fork */
-#define WF_MIGRATED     0x04            /* internal use, task got migrated */
-
-#define ENQUEUE_WAKEUP          1
-#define ENQUEUE_HEAD            2
-#ifdef CONFIG_SMP
-#define ENQUEUE_WAKING          4       /* sched_class::task_waking was called */
-#else
-#define ENQUEUE_WAKING          0
-#endif
-
-#define DEQUEUE_SLEEP           1
-
-struct sched_class {
-        const struct sched_class *next;
-
-        void (*enqueue_task) (struct rq *rq, struct task_struct *p, int flags);
-        void (*dequeue_task) (struct rq *rq, struct task_struct *p, int flags);
-        void (*yield_task) (struct rq *rq);
-        bool (*yield_to_task) (struct rq *rq, struct task_struct *p, bool preempt);
-
-        void (*check_preempt_curr) (struct rq *rq, struct task_struct *p, int flags);
-
-        struct task_struct * (*pick_next_task) (struct rq *rq);
-        void (*put_prev_task) (struct rq *rq, struct task_struct *p);
-
-#ifdef CONFIG_SMP
-        int  (*select_task_rq)(struct task_struct *p, int sd_flag, int flags);
-        void (*migrate_task_rq)(struct task_struct *p, int next_cpu);
-
-        void (*pre_schedule) (struct rq *this_rq, struct task_struct *task);
-        void (*post_schedule) (struct rq *this_rq);
-        void (*task_waking) (struct task_struct *task);
-        void (*task_woken) (struct rq *this_rq, struct task_struct *task);
-
-        void (*set_cpus_allowed)(struct task_struct *p,
-                                 const struct cpumask *newmask);
-
-        void (*rq_online)(struct rq *rq);
-        void (*rq_offline)(struct rq *rq);
-#endif
-
-        void (*set_curr_task) (struct rq *rq);
-        void (*task_tick) (struct rq *rq, struct task_struct *p, int queued);
-        void (*task_fork) (struct task_struct *p);
-
-        void (*switched_from) (struct rq *this_rq, struct task_struct *task);
-        void (*switched_to) (struct rq *this_rq, struct task_struct *task);
-        void (*prio_changed) (struct rq *this_rq, struct task_struct *task,
-                             int oldprio);
-
-        unsigned int (*get_rr_interval) (struct rq *rq,
-                                         struct task_struct *task);
-
-#ifdef CONFIG_FAIR_GROUP_SCHED
-        void (*task_move_group) (struct task_struct *p, int on_rq);
-#endif
-};
-
 struct load_weight {
         unsigned long weight, inv_weight;
 };
@@ -1275,8 +1108,10 @@ struct task_struct {
         int exit_code, exit_signal;
         int pdeath_signal;  /*  The signal sent when the parent dies  */
         unsigned int jobctl;    /* JOBCTL_*, siglock protected */
-        /* ??? */
+
+        /* Used for emulating ABI behavior of previous Linux versions */
         unsigned int personality;
+
         unsigned did_exec:1;
         unsigned in_execve:1;   /* Tell the LSMs that the process is doing an
                                  * execve */
@@ -1328,7 +1163,7 @@ struct task_struct {
 
         cputime_t utime, stime, utimescaled, stimescaled;
         cputime_t gtime;
-#ifndef CONFIG_VIRT_CPU_ACCOUNTING
+#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
         struct cputime prev_cputime;
 #endif
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
@@ -1577,6 +1412,10 @@ struct task_struct {
 #ifdef CONFIG_UPROBES
         struct uprobe_task *utask;
 #endif
+#if defined(CONFIG_BCACHE) || defined(CONFIG_BCACHE_MODULE)
+        unsigned int    sequential_io;
+        unsigned int    sequential_io_avg;
+#endif
 };
 
 /* Future-safe accessor for struct task_struct's cpus_allowed. */
@@ -1794,7 +1633,7 @@ extern void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut,
 #define PF_SWAPWRITE    0x00800000      /* Allowed to write to swap */
 #define PF_SPREAD_PAGE  0x01000000      /* Spread page cache over cpuset */
 #define PF_SPREAD_SLAB  0x02000000      /* Spread some slab caches over cpuset */
-#define PF_THREAD_BOUND 0x04000000      /* Thread bound to specific cpu */
+#define PF_NO_SETAFFINITY 0x04000000    /* Userland is not allowed to meddle with cpus_allowed */
 #define PF_MCE_EARLY    0x08000000      /* Early kill for mce process policy */
 #define PF_MEMPOLICY    0x10000000      /* Non-default NUMA mempolicy */
 #define PF_MUTEX_TESTER 0x20000000      /* Thread belongs to the rt mutex tester */
@@ -1928,13 +1767,13 @@ static inline int set_cpus_allowed_ptr(struct task_struct *p,
 }
 #endif
 
-#ifdef CONFIG_NO_HZ
+#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 */
+#endif /* CONFIG_NO_HZ_COMMON */
 
 #ifndef CONFIG_CPUMASK_OFFSTACK
 static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
@@ -2020,10 +1859,17 @@ extern void idle_task_exit(void);
 static inline void idle_task_exit(void) {}
 #endif
 
-#if defined(CONFIG_NO_HZ) && defined(CONFIG_SMP)
-extern void wake_up_idle_cpu(int cpu);
+#if defined(CONFIG_NO_HZ_COMMON) && defined(CONFIG_SMP)
+extern void wake_up_nohz_cpu(int cpu);
 #else
-static inline void wake_up_idle_cpu(int cpu) { }
+static inline void wake_up_nohz_cpu(int cpu) { }
+#endif
+
+#ifdef CONFIG_NO_HZ_FULL
+extern bool sched_can_stop_tick(void);
+extern u64 scheduler_tick_max_deferment(void);
+#else
+static inline bool sched_can_stop_tick(void) { return false; }
 #endif
 
 #ifdef CONFIG_SCHED_AUTOGROUP
@@ -2413,27 +2259,18 @@ static inline void threadgroup_change_end(struct task_struct *tsk)
  *
  * Lock the threadgroup @tsk belongs to.  No new task is allowed to enter
  * and member tasks aren't allowed to exit (as indicated by PF_EXITING) or
- * perform exec.  This is useful for cases where the threadgroup needs to
- * stay stable across blockable operations.
+ * change ->group_leader/pid.  This is useful for cases where the threadgroup
+ * needs to stay stable across blockable operations.
  *
  * fork and exit paths explicitly call threadgroup_change_{begin|end}() for
  * synchronization.  While held, no new task will be added to threadgroup
  * and no existing live task will have its PF_EXITING set.
  *
- * During exec, a task goes and puts its thread group through unusual
- * changes.  After de-threading, exclusive access is assumed to resources
- * which are usually shared by tasks in the same group - e.g. sighand may
- * be replaced with a new one.  Also, the exec'ing task takes over group
- * leader role including its pid.  Exclude these changes while locked by
- * grabbing cred_guard_mutex which is used to synchronize exec path.
+ * de_thread() does threadgroup_change_{begin|end}() when a non-leader
+ * sub-thread becomes a new leader.
  */
 static inline void threadgroup_lock(struct task_struct *tsk)
 {
-        /*
-         * exec uses exit for de-threading nesting group_rwsem inside
-         * cred_guard_mutex. Grab cred_guard_mutex first.
-         */
-        mutex_lock(&tsk->signal->cred_guard_mutex);
         down_write(&tsk->signal->group_rwsem);
 }
 
@@ -2446,7 +2283,6 @@ static inline void threadgroup_lock(struct task_struct *tsk)
 static inline void threadgroup_unlock(struct task_struct *tsk)
 {
         up_write(&tsk->signal->group_rwsem);
-        mutex_unlock(&tsk->signal->cred_guard_mutex);
 }
 #else
 static inline void threadgroup_change_begin(struct task_struct *tsk) {}
@@ -2623,6 +2459,47 @@ static inline int spin_needbreak(spinlock_t *lock)
 }
 
 /*
+ * Idle thread specific functions to determine the need_resched
+ * polling state. We have two versions, one based on TS_POLLING in
+ * thread_info.status and one based on TIF_POLLING_NRFLAG in
+ * thread_info.flags
+ */
+#ifdef TS_POLLING
+static inline int tsk_is_polling(struct task_struct *p)
+{
+        return task_thread_info(p)->status & TS_POLLING;
+}
+static inline void current_set_polling(void)
+{
+        current_thread_info()->status |= TS_POLLING;
+}
+
+static inline void current_clr_polling(void)
+{
+        current_thread_info()->status &= ~TS_POLLING;
+        smp_mb__after_clear_bit();
+}
+#elif defined(TIF_POLLING_NRFLAG)
+static inline int tsk_is_polling(struct task_struct *p)
+{
+        return test_tsk_thread_flag(p, TIF_POLLING_NRFLAG);
+}
+static inline void current_set_polling(void)
+{
+        set_thread_flag(TIF_POLLING_NRFLAG);
+}
+
+static inline void current_clr_polling(void)
+{
+        clear_thread_flag(TIF_POLLING_NRFLAG);
+}
+#else
+static inline int tsk_is_polling(struct task_struct *p) { return 0; }
+static inline void current_set_polling(void) { }
+static inline void current_clr_polling(void) { }
+#endif
+
+/*
  * Thread group CPU time accounting.
  */
 void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times);
@@ -2682,28 +2559,7 @@ 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;
-
-extern struct task_group *sched_create_group(struct task_group *parent);
-extern void sched_online_group(struct task_group *tg,
-                               struct task_group *parent);
-extern void sched_destroy_group(struct task_group *tg);
-extern void sched_offline_group(struct task_group *tg);
-extern void sched_move_task(struct task_struct *tsk);
-#ifdef CONFIG_FAIR_GROUP_SCHED
-extern int sched_group_set_shares(struct task_group *tg, unsigned long shares);
-extern unsigned long sched_group_shares(struct task_group *tg);
-#endif
-#ifdef CONFIG_RT_GROUP_SCHED
-extern int sched_group_set_rt_runtime(struct task_group *tg,
-                                      long rt_runtime_us);
-extern long sched_group_rt_runtime(struct task_group *tg);
-extern int sched_group_set_rt_period(struct task_group *tg,
-                                      long rt_period_us);
-extern long sched_group_rt_period(struct task_group *tg);
-extern int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk);
-#endif
 #endif /* CONFIG_CGROUP_SCHED */
 
 extern int task_can_switch_user(struct user_struct *up,