runtime: mark endcgo go:nosplit

Should help windows/amd64.

TBR=khr
CC=golang-codereviews
https://golang.org/cl/134660043

diff --git a/src/runtime/cgocall.go b/src/runtime/cgocall.go
index 76a533e9338933ed07d3ce5612b99eac91d0a8cc..a21474b01f675974034f5c1d49de774d37fa6443 100644 (file)
--- a/src/runtime/cgocall.go
+++ b/src/runtime/cgocall.go
@@ -134,6 +134,7 @@ func cgocall_errno(fn, arg unsafe.Pointer) int32 {
        return errno
 }
 
+//go:nosplit
 func endcgo(mp *m) {
        mp.ncgo--
        if mp.ncgo == 0 {