[hrtimer] Enforce resolution as lower limit of intervals

[deliverable/linux.git] / kernel / sched.c

diff --git a/kernel/sched.c b/kernel/sched.c
index ac3f5cc3bb51f725bbf5b8eae5db83516a3c9dee..c0c60c926d5eafe1ebd57a0f298324933cb46507 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -27,6 +27,7 @@
 #include <linux/smp_lock.h>
 #include <asm/mmu_context.h>
 #include <linux/interrupt.h>
+#include <linux/capability.h>
 #include <linux/completion.h>
 #include <linux/kernel_stat.h>
 #include <linux/security.h>
@@ -176,6 +177,13 @@ static unsigned int task_timeslice(task_t *p)
 #define task_hot(p, now, sd) ((long long) ((now) - (p)->last_ran)      \
                                < (long long) (sd)->cache_hot_time)
 
+void __put_task_struct_cb(struct rcu_head *rhp)
+{
+       __put_task_struct(container_of(rhp, struct task_struct, rcu));
+}
+
+EXPORT_SYMBOL_GPL(__put_task_struct_cb);
+
 /*
  * These are the runqueue data structures:
  */
@@ -815,7 +823,8 @@ static void activate_task(task_t *p, runqueue_t *rq, int local)
        }
 #endif
 
-       p->prio = recalc_task_prio(p, now);
+       if (!rt_task(p))
+               p->prio = recalc_task_prio(p, now);
 
        /*
         * This checks to make sure it's not an uninterruptible task
@@ -1436,7 +1445,7 @@ void fastcall sched_fork(task_t *p, int clone_flags)
 #endif
 #ifdef CONFIG_PREEMPT
        /* Want to start with kernel preemption disabled. */
-       p->thread_info->preempt_count = 1;
+       task_thread_info(p)->preempt_count = 1;
 #endif
        /*
         * Share the timeslice between parent and child, thus the
@@ -3971,12 +3980,12 @@ asmlinkage long sys_sched_setaffinity(pid_t pid, unsigned int len,
  * method, such as ACPI for e.g.
  */
 
-cpumask_t cpu_present_map;
+cpumask_t cpu_present_map __read_mostly;
 EXPORT_SYMBOL(cpu_present_map);
 
 #ifndef CONFIG_SMP
-cpumask_t cpu_online_map = CPU_MASK_ALL;
-cpumask_t cpu_possible_map = CPU_MASK_ALL;
+cpumask_t cpu_online_map __read_mostly = CPU_MASK_ALL;
+cpumask_t cpu_possible_map __read_mostly = CPU_MASK_ALL;
 #endif
 
 long sched_getaffinity(pid_t pid, cpumask_t *mask)
@@ -4326,10 +4335,10 @@ static void show_task(task_t *p)
 #endif
 #ifdef CONFIG_DEBUG_STACK_USAGE
        {
-               unsigned long *n = (unsigned long *) (p->thread_info+1);
+               unsigned long *n = end_of_stack(p);
                while (!*n)
                        n++;
-               free = (unsigned long) n - (unsigned long)(p->thread_info+1);
+               free = (unsigned long)n - (unsigned long)end_of_stack(p);
        }
 #endif
        printk("%5lu %5d %6d ", free, p->pid, p->parent->pid);
@@ -4378,6 +4387,7 @@ void show_state(void)
        } while_each_thread(g, p);
 
        read_unlock(&tasklist_lock);
+       mutex_debug_show_all_locks();
 }
 
 /**
@@ -4409,9 +4419,9 @@ void __devinit init_idle(task_t *idle, int cpu)
 
        /* Set the preempt count _outside_ the spinlocks! */
 #if defined(CONFIG_PREEMPT) && !defined(CONFIG_PREEMPT_BKL)
-       idle->thread_info->preempt_count = (idle->lock_depth >= 0);
+       task_thread_info(idle)->preempt_count = (idle->lock_depth >= 0);
 #else
-       idle->thread_info->preempt_count = 0;
+       task_thread_info(idle)->preempt_count = 0;
 #endif
 }