v := atomic.Loaduintptr(&l.key)
		if v&locked == 0 {
			// Unlocked. Try to lock.
			if atomic.Casuintptr(&l.key, v, v|locked) {
				timer.end()
				return
			}
			i = 0
		}
		if i < spin {
			procyield(active_spin_cnt)
		} else if i < spin+passive_spin {
			osyield()
		} else {
			// Someone else has it.
			// l->waitm points to a linked list of M's waiting
			// for this lock, chained through m->nextwaitm.

	}
	for {
		// Try for lock, spinning.
		for i := 0; i < spin; i++ {
			for l.key == mutex_unlocked {
				if atomic.Cas(key32(&l.key), mutex_unlocked, wait) {
					timer.end()
					return
				}
			}
			procyield(active_spin_cnt)
		}

		// Try for lock, rescheduling.
		for i := 0; i < passive_spin; i++ {
			for l.key == mutex_unlocked {
				if atomic.Cas(key32(&l.key), mutex_unlocked, wait) {
					timer.end()

//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname procyield
func procyield(cycles uint32)

type neverCallThisFunction struct{}

// goexit is the return stub at the top of every goroutine call stack.
// Each goroutine stack is constructed as if goexit called the
// goroutine's entry point function, so that when the entry point

		// best-effort) and then sleep until we're notified
		// that the goroutine is suspended.
		if i == 0 {
			nextYield = nanotime() + yieldDelay
		}
		if nanotime() < nextYield {
			procyield(10)
		} else {
			osyield()
			nextYield = nanotime() + yieldDelay/2
		}
	}
}

// resumeG undoes the effects of suspendG, allowing the suspended
// goroutine to continue from its current safe-point.

	MOV	gobuf_ret(T0), A0
	MOV	gobuf_ctxt(T0), CTXT
	MOV	ZERO, gobuf_sp(T0)
	MOV	ZERO, gobuf_ret(T0)
	MOV	ZERO, gobuf_lr(T0)
	MOV	ZERO, gobuf_ctxt(T0)
	MOV	gobuf_pc(T0), T0
	JALR	ZERO, T0

// func procyield(cycles uint32)
TEXT runtime·procyield(SB),NOSPLIT,$0-0
	RET

// Switch to m->g0's stack, call fn(g).
// Fn must never return. It should gogo(&g->sched)
// to keep running g.

// func mcall(fn func(*g))

			})
		}
		if i == 0 {
			nextYield = nanotime() + yieldDelay
		}
		if nanotime() < nextYield {
			for x := 0; x < 10 && gp.atomicstatus.Load() != oldval; x++ {
				procyield(1)
			}
		} else {
			osyield()
			nextYield = nanotime() + yieldDelay/2
		}
	}

	if oldval == _Grunning {
		// Track every gTrackingPeriod time a goroutine transitions out of running.