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sched/core: Add preempt_count invariant check
Ingo requested I keep my debug check for the preempt_count invariant. Requested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -2514,6 +2514,10 @@ static struct rq *finish_task_switch(struct task_struct *prev)
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*
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* Also, see FORK_PREEMPT_COUNT.
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*/
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if (WARN_ONCE(preempt_count() != 2*PREEMPT_DISABLE_OFFSET,
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"corrupted preempt_count: %s/%d/0x%x\n",
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current->comm, current->pid, preempt_count()))
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preempt_count_set(FORK_PREEMPT_COUNT);
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rq->prev_mm = NULL;
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