cfq-iosched: make io priorities inherit CPU scheduling class as well as nice

[linux-2.6-omap-h63xx.git] / include / linux / sched.h

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 1d02babdb2c71ef3df2b427ab6025737bd661bd3..0c35b0343a76bf20327af6a84b1be976493735e3 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -158,6 +158,8 @@ print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 }
 #endif
 
+extern unsigned long long time_sync_thresh;
+
 /*
  * Task state bitmask. NOTE! These bits are also
  * encoded in fs/proc/array.c: get_task_state().
@@ -554,6 +556,14 @@ struct signal_struct {
 #define SIGNAL_STOP_DEQUEUED   0x00000002 /* stop signal dequeued */
 #define SIGNAL_STOP_CONTINUED  0x00000004 /* SIGCONT since WCONTINUED reap */
 #define SIGNAL_GROUP_EXIT      0x00000008 /* group exit in progress */
+/*
+ * Pending notifications to parent.
+ */
+#define SIGNAL_CLD_STOPPED     0x00000010
+#define SIGNAL_CLD_CONTINUED   0x00000020
+#define SIGNAL_CLD_MASK                (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED)
+
+#define SIGNAL_UNKILLABLE      0x00000040 /* for init: ignore fatal signals */
 
 /* If true, all threads except ->group_exit_task have pending SIGKILL */
 static inline int signal_group_exit(const struct signal_struct *sig)
@@ -1167,7 +1177,7 @@ struct task_struct {
        struct sighand_struct *sighand;
 
        sigset_t blocked, real_blocked;
-       sigset_t saved_sigmask;         /* To be restored with TIF_RESTORE_SIGMASK */
+       sigset_t saved_sigmask; /* restored if set_restore_sigmask() was used */
        struct sigpending pending;
 
        unsigned long sas_ss_sp;
@@ -1543,6 +1553,35 @@ static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
 
 extern unsigned long long sched_clock(void);
 
+#ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
+static inline void sched_clock_init(void)
+{
+}
+
+static inline u64 sched_clock_cpu(int cpu)
+{
+       return sched_clock();
+}
+
+static inline void sched_clock_tick(void)
+{
+}
+
+static inline void sched_clock_idle_sleep_event(void)
+{
+}
+
+static inline void sched_clock_idle_wakeup_event(u64 delta_ns)
+{
+}
+#else
+extern void sched_clock_init(void);
+extern u64 sched_clock_cpu(int cpu);
+extern void sched_clock_tick(void);
+extern void sched_clock_idle_sleep_event(void);
+extern void sched_clock_idle_wakeup_event(u64 delta_ns);
+#endif
+
 /*
  * For kernel-internal use: high-speed (but slightly incorrect) per-cpu
  * clock constructed from sched_clock():
@@ -1669,7 +1708,10 @@ extern struct pid_namespace init_pid_ns;
 extern struct task_struct *find_task_by_pid_type_ns(int type, int pid,
                struct pid_namespace *ns);
 
-extern struct task_struct *find_task_by_pid(pid_t nr);
+static inline struct task_struct *__deprecated find_task_by_pid(pid_t nr)
+{
+       return find_task_by_pid_type_ns(PIDTYPE_PID, nr, &init_pid_ns);
+}
 extern struct task_struct *find_task_by_vpid(pid_t nr);
 extern struct task_struct *find_task_by_pid_ns(pid_t nr,
                struct pid_namespace *ns);
@@ -1745,8 +1787,7 @@ extern void zap_other_threads(struct task_struct *p);
 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 send_sigqueue(struct sigqueue *,  struct task_struct *, int group);
 extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *);
 extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long);
 
@@ -1967,6 +2008,11 @@ static inline void clear_tsk_need_resched(struct task_struct *tsk)
        clear_tsk_thread_flag(tsk,TIF_NEED_RESCHED);
 }
 
+static inline int test_tsk_need_resched(struct task_struct *tsk)
+{
+       return unlikely(test_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));
@@ -1981,7 +2027,7 @@ static inline int fatal_signal_pending(struct task_struct *p)
 
 static inline int need_resched(void)
 {
-       return unlikely(test_thread_flag(TIF_NEED_RESCHED));
+       return unlikely(test_tsk_need_resched(current));
 }
 
 /*