D1028.diff
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	Index: head/sys/kern/kern_thr.c
	===================================================================
	--- head/sys/kern/kern_thr.c
	+++ head/sys/kern/kern_thr.c
	@@ -307,9 +307,6 @@
	sys_thr_exit(struct thread td, struct thr_exit_args uap)
	/* long state /
	{
	- struct proc *p;
	-
	- p = td->td_proc;

	/* Signal userland that it can free the stack. */
	if ((void *)uap->state != NULL) {
	@@ -317,8 +314,17 @@
	kern_umtx_wake(td, uap->state, INT_MAX, 0);
	}

	- rw_wlock(&tidhash_lock);
	+ return (kern_thr_exit(td));
	+}
	+
	+int
	+kern_thr_exit(struct thread *td)
	+{
	+ struct proc *p;

	+ p = td->td_proc;
	+
	+ rw_wlock(&tidhash_lock);
	PROC_LOCK(p);

	if (p->p_numthreads != 1) {
	Index: head/sys/sys/syscallsubr.h
	===================================================================
	--- head/sys/sys/syscallsubr.h
	+++ head/sys/sys/syscallsubr.h
	@@ -214,6 +214,7 @@
	int kern_ktimer_gettime(struct thread *td, int timer_id,
	struct itimerspec *val);
	int kern_ktimer_getoverrun(struct thread *td, int timer_id);
	+int kern_thr_exit(struct thread *td);
	int kern_thr_new(struct thread td, struct thr_param param);
	int kern_thr_suspend(struct thread td, struct timespec tsp);
	int kern_truncate(struct thread td, char path, enum uio_seg pathseg,