Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / sched.h

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 01c7d85bcaa7b428a0cb60ba129d8856d304794c..981ab688725994fd8a678bf3dcf6a2b41ad84375 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2456,6 +2456,47 @@ 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.
  */