rq = cpu_rq(cpu);
rcu_note_context_switch(cpu);
prev = rq->curr;
- switch_count = &prev->nivcsw;
release_kernel_lock(prev);
need_resched_nonpreemptible:
raw_spin_lock_irq(&rq->lock);
clear_tsk_need_resched(prev);
+ switch_count = &prev->nivcsw;
if (prev->state && !(preempt_count() & PREEMPT_ACTIVE)) {
if (unlikely(signal_pending_state(prev->state, prev))) {
prev->state = TASK_RUNNING;
context_switch(rq, prev, next); /* unlocks the rq */
/*
- * the context switch might have flipped the stack from under
- * us, hence refresh the local variables.
+ * The context switch have flipped the stack from under us
+ * and restored the local variables which were saved when
+ * this task called schedule() in the past. prev == current
+ * is still correct, but it can be moved to another cpu/rq.
*/
cpu = smp_processor_id();
rq = cpu_rq(cpu);
post_schedule(rq);
- if (unlikely(reacquire_kernel_lock(current) < 0)) {
- prev = rq->curr;
- switch_count = &prev->nivcsw;
+ if (unlikely(reacquire_kernel_lock(prev)))
goto need_resched_nonpreemptible;
- }
preempt_enable_no_resched();
if (need_resched())