re PR other/29842 ([meta-bug] outstanding patches / issues from STMicroelectronics)

	PR go/29842
    runtime: update HURD support for mOS now being embedded
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/210285

From-SVN: r279062

gcc/go/gofrontend/MERGE

-e32651d37e0c43bb7595ac94363b079610bed746
+f04751699e1a1ce98fe8bdbcce5a00f1be6a7d15
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/go/runtime/os_hurd.go

@@ -39,7 +39,7 @@ func sem_timedwait(sem *_sem_t, timeout *timespec) int32
 
 //go:nosplit
 func semacreate(mp *m) {
-	if mp.mos.waitsema != 0 {
+	if mp.waitsema != 0 {
 		return
 	}
 
@@ -52,7 +52,7 @@ func semacreate(mp *m) {
 	if sem_init(sem, 0, 0) != 0 {
 		throw("sem_init")
 	}
-	mp.mos.waitsema = uintptr(unsafe.Pointer(sem))
+	mp.waitsema = uintptr(unsafe.Pointer(sem))
 }
 
 //go:nosplit
@@ -62,7 +62,7 @@ func semasleep(ns int64) int32 {
 		var ts timespec
 		ts.setNsec(ns)
 
-		if sem_timedwait((*_sem_t)(unsafe.Pointer(_m_.mos.waitsema)), &ts) != 0 {
+		if sem_timedwait((*_sem_t)(unsafe.Pointer(_m_.waitsema)), &ts) != 0 {
 			err := errno()
 			if err == _ETIMEDOUT || err == _EAGAIN || err == _EINTR {
 				return -1
@@ -72,7 +72,7 @@ func semasleep(ns int64) int32 {
 		return 0
 	}
 	for {
-		r1 := sem_wait((*_sem_t)(unsafe.Pointer(_m_.mos.waitsema)))
+		r1 := sem_wait((*_sem_t)(unsafe.Pointer(_m_.waitsema)))
 		if r1 == 0 {
 			break
 		}
@@ -86,7 +86,7 @@ func semasleep(ns int64) int32 {
 
 //go:nosplit
 func semawakeup(mp *m) {
-	if sem_post((*_sem_t)(unsafe.Pointer(mp.mos.waitsema))) != 0 {
+	if sem_post((*_sem_t)(unsafe.Pointer(mp.waitsema))) != 0 {
 		throw("sem_post")
 	}
 }