diff --git a/src/runtime/mgc.go b/src/runtime/mgc.go
index 2c6af43da5..9a35c7671f 100644
--- a/src/runtime/mgc.go
+++ b/src/runtime/mgc.go
@@ -1061,7 +1061,7 @@ func GC() {
 	// complete the cycle and because runtime.GC() is often used
 	// as part of tests and benchmarks to get the system into a
 	// relatively stable and isolated state.
-	for atomic.Load(&work.cycles) == n+1 && gosweepone() != ^uintptr(0) {
+	for atomic.Load(&work.cycles) == n+1 && sweepone() != ^uintptr(0) {
 		sweep.nbgsweep++
 		Gosched()
 	}
@@ -1219,7 +1219,7 @@ func gcStart(trigger gcTrigger) {
 	//
 	// We check the transition condition continuously here in case
 	// this G gets delayed in to the next GC cycle.
-	for trigger.test() && gosweepone() != ^uintptr(0) {
+	for trigger.test() && sweepone() != ^uintptr(0) {
 		sweep.nbgsweep++
 	}
 
diff --git a/src/runtime/mgcsweep.go b/src/runtime/mgcsweep.go
index b7528ab68f..35b717ca9b 100644
--- a/src/runtime/mgcsweep.go
+++ b/src/runtime/mgcsweep.go
@@ -52,7 +52,7 @@ func bgsweep(c chan int) {
 	goparkunlock(&sweep.lock, waitReasonGCSweepWait, traceEvGoBlock, 1)
 
 	for {
-		for gosweepone() != ^uintptr(0) {
+		for sweepone() != ^uintptr(0) {
 			sweep.nbgsweep++
 			Gosched()
 		}
@@ -72,9 +72,8 @@ func bgsweep(c chan int) {
 	}
 }
 
-// sweeps one span
-// returns number of pages returned to heap, or ^uintptr(0) if there is nothing to sweep
-//go:nowritebarrier
+// sweepone sweeps one span and returns the number of pages returned
+// to the heap, or ^uintptr(0) if there was nothing to sweep.
 func sweepone() uintptr {
 	_g_ := getg()
 	sweepRatio := mheap_.sweepPagesPerByte // For debugging
@@ -135,15 +134,6 @@ func sweepone() uintptr {
 	return npages
 }
 
-//go:nowritebarrier
-func gosweepone() uintptr {
-	var ret uintptr
-	systemstack(func() {
-		ret = sweepone()
-	})
-	return ret
-}
-
 //go:nowritebarrier
 func gosweepdone() bool {
 	return mheap_.sweepdone != 0
@@ -414,7 +404,7 @@ retry:
 	newHeapLive := uintptr(atomic.Load64(&memstats.heap_live)-mheap_.sweepHeapLiveBasis) + spanBytes
 	pagesTarget := int64(mheap_.sweepPagesPerByte*float64(newHeapLive)) - int64(callerSweepPages)
 	for pagesTarget > int64(atomic.Load64(&mheap_.pagesSwept)-sweptBasis) {
-		if gosweepone() == ^uintptr(0) {
+		if sweepone() == ^uintptr(0) {
 			mheap_.sweepPagesPerByte = 0
 			break
 		}