Merge commit '8700c95adb03' into timers/nohz

[firefly-linux-kernel-4.4.55.git] / include / linux / sched.h

diff --git a/include/linux/sched.h b/include/linux/sched.h
index a74adedcdd10b0bea041ad1aa5bc814eb718458d..ebf7095158a9ebe88ef289b11b153daebe82cb60 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -151,9 +151,10 @@ print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq);
 #define TASK_DEAD              64
 #define TASK_WAKEKILL          128
 #define TASK_WAKING            256
-#define TASK_STATE_MAX         512
+#define TASK_PARKED            512
+#define TASK_STATE_MAX         1024
 
-#define TASK_STATE_TO_CHAR_STR "RSDTtZXxKW"
+#define TASK_STATE_TO_CHAR_STR "RSDTtZXxKWP"
 
 extern char ___assert_task_state[1 - 2*!!(
                sizeof(TASK_STATE_TO_CHAR_STR)-1 != ilog2(TASK_STATE_MAX)+1)];
@@ -308,7 +309,6 @@ 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;
@@ -808,6 +808,8 @@ 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;
 
@@ -1105,8 +1107,10 @@ 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 */
@@ -1624,7 +1628,7 @@ 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 */
@@ -2458,6 +2462,47 @@ static inline int spin_needbreak(spinlock_t *lock)
 #endif
 }
 
+/*
+ * 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.
  */