code review 204065: runtime: allow arbitrary return type in SetFinalizer.

src/pkg/runtime/linux/thread.c

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 #include "runtime.h"
 #include "defs.h"
 #include "signals.h"
 #include "os.h"
 
 // Linux futex.
@@ skipping 156 matching lines @@
 
 void
 unlock(Lock *l)
 {
         m->locks--;
         if(m->locks < 0)
                 throw("lock count");
         futexunlock(l);
 }
 
+void
+destroylock(Lock *l)
+{
+}
+
 
 // One-time notifications.
 //
 // Since the lock/unlock implementation already
 // takes care of sleeping in the kernel, we just reuse it.
 // (But it's a weird use, so it gets its own interface.)
 //
 // We use a lock to represent the event:
 // unlocked == event has happened.
 // Thus the lock starts out locked, and to wait for the
@@ skipping 79 matching lines @@
 }
 
 // Called to initialize a new m (including the bootstrap m).
 void
 minit(void)
 {
         // Initialize signal handling.
         m->gsignal = malg(32*1024);     // OS X wants >=8K, Linux >=2K
         signalstack(m->gsignal->stackguard, 32*1024);
 }