Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm

[pandora-kernel.git] / kernel / sched.c

diff --git a/kernel/sched.c b/kernel/sched.c
index 8a0afb9..3df33da 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1567,6 +1567,7 @@ int fastcall wake_up_state(struct task_struct *p, unsigned int state)
        return try_to_wake_up(p, state, 0);
 }
 
+static void task_running_tick(struct rq *rq, struct task_struct *p);
 /*
  * Perform scheduler related setup for a newly forked process p.
  * p is forked by current.
@@ -1627,7 +1628,7 @@ void fastcall sched_fork(struct task_struct *p, int clone_flags)
                 * runqueue lock is not a problem.
                 */
                current->time_slice = 1;
-               scheduler_tick();
+               task_running_tick(cpu_rq(cpu), current);
        }
        local_irq_enable();
        put_cpu();
@@ -3429,6 +3430,8 @@ asmlinkage void __sched schedule(void)
                        "%s/0x%08x/%d\n",
                        current->comm, preempt_count(), current->pid);
                debug_show_held_locks(current);
+               if (irqs_disabled())
+                       print_irqtrace_events(current);
                dump_stack();
        }
        profile_hit(SCHED_PROFILING, __builtin_return_address(0));
@@ -4614,15 +4617,6 @@ asmlinkage long sys_sched_yield(void)
        return 0;
 }
 
-static inline int __resched_legal(int expected_preempt_count)
-{
-       if (unlikely(preempt_count() != expected_preempt_count))
-               return 0;
-       if (unlikely(system_state != SYSTEM_RUNNING))
-               return 0;
-       return 1;
-}
-
 static void __cond_resched(void)
 {
 #ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
@@ -4642,7 +4636,8 @@ static void __cond_resched(void)
 
 int __sched cond_resched(void)
 {
-       if (need_resched() && __resched_legal(0)) {
+       if (need_resched() && !(preempt_count() & PREEMPT_ACTIVE) &&
+                                       system_state == SYSTEM_RUNNING) {
                __cond_resched();
                return 1;
        }
@@ -4668,7 +4663,7 @@ int cond_resched_lock(spinlock_t *lock)
                ret = 1;
                spin_lock(lock);
        }
-       if (need_resched() && __resched_legal(1)) {
+       if (need_resched() && system_state == SYSTEM_RUNNING) {
                spin_release(&lock->dep_map, 1, _THIS_IP_);
                _raw_spin_unlock(lock);
                preempt_enable_no_resched();
@@ -4684,7 +4679,7 @@ int __sched cond_resched_softirq(void)
 {
        BUG_ON(!in_softirq());
 
-       if (need_resched() && __resched_legal(0)) {
+       if (need_resched() && system_state == SYSTEM_RUNNING) {
                raw_local_irq_disable();
                _local_bh_enable();
                raw_local_irq_enable();
@@ -5605,7 +5600,7 @@ static void cpu_attach_domain(struct sched_domain *sd, int cpu)
 }
 
 /* cpus with isolated domains */
-static cpumask_t __cpuinitdata cpu_isolated_map = CPU_MASK_NONE;
+static cpumask_t cpu_isolated_map = CPU_MASK_NONE;
 
 /* Setup the mask of cpus configured for isolated domains */
 static int __init isolated_cpu_setup(char *str)
@@ -6977,6 +6972,8 @@ void __might_sleep(char *file, int line)
                printk("in_atomic():%d, irqs_disabled():%d\n",
                        in_atomic(), irqs_disabled());
                debug_show_held_locks(current);
+               if (irqs_disabled())
+                       print_irqtrace_events(current);
                dump_stack();
        }
 #endif