D3364.id7892.diff
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D3364.id7892.diff
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	Index: sys/kern/kern_event.c
	===================================================================
	--- sys/kern/kern_event.c
	+++ sys/kern/kern_event.c
	@@ -975,6 +975,10 @@
	return (error);
	}

	+/*
	+ * Performs a kevent() call on a temporarily created kqueue. This can be
	+ * used to perform one-shot polling, similar to poll() and select().
	+ */
	int
	kern_kevent_anonymous(struct thread *td, int nevents,
	struct kevent_copyops *k_ops)
	@@ -1831,6 +1835,8 @@
	kqueue_destroy(struct kqueue *kq)
	{

	+ KASSERT(kq->kq_fdp == NULL,
	+ ("kqueue still attached to a file descriptor"));
	seldrain(&kq->kq_sel);
	knlist_destroy(&kq->kq_sel.si_note);
	mtx_destroy(&kq->kq_lock);
	@@ -1863,6 +1869,7 @@
	* take the sleepable lock after non-sleepable.
	*/
	fdp = kq->kq_fdp;
	+ kq->kq_fdp = NULL;
	if (!sx_xlocked(FILEDESC_LOCK(fdp))) {
	FILEDESC_XLOCK(fdp);
	filedesc_unlock = 1;