code review 5191044: runtime: fix spurious deadlock reporting

src/pkg/runtime/malloc.h

 // 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.
 
 // Memory allocator, based on tcmalloc.
 // http://goog-perftools.sourceforge.net/doc/tcmalloc.html
 
 // The main allocator works in runs of pages.
 // Small allocation sizes (up to and including 32 kB) are
 // rounded to one of about 100 size classes, each of which
@@ skipping 389 matching lines @@
 enum
 {
         // flags to malloc
         FlagNoPointers = 1<<0,  // no pointers here
         FlagNoProfiling = 1<<1, // must not profile
         FlagNoGC = 1<<2,        // must not free or scan for pointers
 };
 
 void    runtime·MProf_Malloc(void*, uintptr);
 void    runtime·MProf_Free(void*, uintptr);
-int32   runtime·helpgc(void);
+int32   runtime·helpgc(bool*);
 void    runtime·gchelper(void);
 
 // Malloc profiling settings.
 // Must match definition in extern.go.
 enum {
         MProf_None = 0,
         MProf_Sample = 1,
         MProf_All = 2,
 };
 extern int32 runtime·malloc_profile;
 
 typedef struct Finalizer Finalizer;
 struct Finalizer
 {
         Finalizer *next;        // for use by caller of getfinalizer
         void (*fn)(void*);
         void *arg;
         int32 nret;
 };
 
 Finalizer*      runtime·getfinalizer(void*, bool);