runtime: retry fix openbsd build

Tested on linux/amd64 too this time.

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=dave, golang-codereviews, iant, rsc
https://golang.org/cl/140050043

src/pkg/runtime/defs_openbsd.go

@@ -104,7 +104,7 @@ const (
 	EVFILT_WRITE = C.EVFILT_WRITE
 )
 
-type Tfork C.struct___tfork
+type TforkT C.struct___tfork
 
 type SigaltstackT C.struct_sigaltstack
 type Sigcontext C.struct_sigcontext
@@ -118,4 +118,4 @@ type Timespec C.struct_timespec
 type Timeval C.struct_timeval
 type Itimerval C.struct_itimerval
 
-type Kevent C.struct_kevent
+type KeventT C.struct_kevent

src/pkg/runtime/defs_openbsd_386.h

@@ -81,7 +81,7 @@ enum {
 	EVFILT_WRITE	= -0x2,
 };
 
-typedef struct Tfork Tfork;
+typedef struct TforkT TforkT;
 typedef struct SigaltstackT SigaltstackT;
 typedef struct Sigcontext Sigcontext;
 typedef struct Siginfo Siginfo;
@@ -93,7 +93,7 @@ typedef struct KeventT KeventT;
 
 #pragma pack on
 
-struct Tfork {
+struct TforkT {
 	byte	*tf_tcb;
 	int32	*tf_tid;
 	byte	*tf_stack;

src/pkg/runtime/defs_openbsd_amd64.h

@@ -81,7 +81,7 @@ enum {
 	EVFILT_WRITE	= -0x2,
 };
 
-typedef struct Tfork Tfork;
+typedef struct TforkT TforkT;
 typedef struct SigaltstackT SigaltstackT;
 typedef struct Sigcontext Sigcontext;
 typedef struct Siginfo Siginfo;
@@ -93,7 +93,7 @@ typedef struct KeventT KeventT;
 
 #pragma pack on
 
-struct Tfork {
+struct TforkT {
 	byte	*tf_tcb;
 	int32	*tf_tid;
 	byte	*tf_stack;

src/pkg/runtime/os_openbsd.c

@@ -26,7 +26,7 @@ extern SigTab runtime·sigtab[];
 static Sigset sigset_none;
 static Sigset sigset_all = ~(Sigset)0;
 
-extern int32 runtime·tfork(void *param, uintptr psize, M *mp, G *gp, void (*fn)(void));
+extern int32 runtime·tfork(TforkT *param, uintptr psize, M *mp, G *gp, void (*fn)(void));
 extern int32 runtime·thrsleep(void *ident, int32 clock_id, void *tsp, void *lock, const int32 *abort);
 extern int32 runtime·thrwakeup(void *ident, int32 n);
 
@@ -130,7 +130,7 @@ runtime·semawakeup(M *mp)
 void
 runtime·newosproc(M *mp, void *stk)
 {
-	Tfork param;
+	TforkT param;
 	Sigset oset;
 	int32 ret;
 
@@ -147,7 +147,7 @@ runtime·newosproc(M *mp, void *stk)
 	param.tf_stack = stk;
 
 	oset = runtime·sigprocmask(SIG_SETMASK, sigset_all);
-	ret = runtime·tfork((byte*)&param, sizeof(param), mp, mp->g0, runtime·mstart);
+	ret = runtime·tfork(&param, sizeof(param), mp, mp->g0, runtime·mstart);
 	runtime·sigprocmask(SIG_SETMASK, oset);
 
 	if(ret < 0) {