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authorClark Williams <williams@redhat.com>2013-02-07 19:47:07 +0400
committerIngo Molnar <mingo@kernel.org>2013-02-07 23:51:08 +0400
commit8bd75c77b7c6a3954140dd2e20346aef3efe4a35 (patch)
tree10e0d451a58aeb6c8f48b871a848276bf3a8a359 /include/linux/sched
parentce0dbbbb30aee6a835511d5be446462388ba9eee (diff)
downloadlinux-8bd75c77b7c6a3954140dd2e20346aef3efe4a35.tar.xz
sched/rt: Move rt specific bits into new header file
Move rt scheduler definitions out of include/linux/sched.h into new file include/linux/sched/rt.h Signed-off-by: Clark Williams <williams@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20130207094707.7b9f825f@riff.lan Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/sched')
-rw-r--r--include/linux/sched/rt.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/include/linux/sched/rt.h b/include/linux/sched/rt.h
new file mode 100644
index 000000000000..94e19ea28fc3
--- /dev/null
+++ b/include/linux/sched/rt.h
@@ -0,0 +1,58 @@
+#ifndef _SCHED_RT_H
+#define _SCHED_RT_H
+
+/*
+ * Priority of a process goes from 0..MAX_PRIO-1, valid RT
+ * priority is 0..MAX_RT_PRIO-1, and SCHED_NORMAL/SCHED_BATCH
+ * tasks are in the range MAX_RT_PRIO..MAX_PRIO-1. Priority
+ * values are inverted: lower p->prio value means higher priority.
+ *
+ * The MAX_USER_RT_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 DEFAULT_PRIO (MAX_RT_PRIO + 20)
+
+static inline int rt_prio(int prio)
+{
+ if (unlikely(prio < MAX_RT_PRIO))
+ return 1;
+ return 0;
+}
+
+static inline int rt_task(struct task_struct *p)
+{
+ return rt_prio(p->prio);
+}
+
+#ifdef CONFIG_RT_MUTEXES
+extern int rt_mutex_getprio(struct task_struct *p);
+extern void rt_mutex_setprio(struct task_struct *p, int prio);
+extern void rt_mutex_adjust_pi(struct task_struct *p);
+static inline bool tsk_is_pi_blocked(struct task_struct *tsk)
+{
+ return tsk->pi_blocked_on != NULL;
+}
+#else
+static inline int rt_mutex_getprio(struct task_struct *p)
+{
+ return p->normal_prio;
+}
+# define rt_mutex_adjust_pi(p) do { } while (0)
+static inline bool tsk_is_pi_blocked(struct task_struct *tsk)
+{
+ return false;
+}
+#endif
+
+extern void normalize_rt_tasks(void);
+
+
+#endif /* _SCHED_RT_H */