[commit: ghc] master: use StgWord not StgWord8 for wakeup (0b0fec5)

[git at git.haskell.org]

Repository : ssh://git at git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/0b0fec536e35769b64b8bc5397c84138fa512155/ghc

>---------------------------------------------------------------

commit 0b0fec536e35769b64b8bc5397c84138fa512155
Author: Simon Marlow <marlowsd at gmail.com>
Date:   Tue Sep 17 21:49:53 2013 +0100

    use StgWord not StgWord8 for wakeup
    
    volatile StgWord8 is not guaranteed to be atomic.


>---------------------------------------------------------------

0b0fec536e35769b64b8bc5397c84138fa512155
 rts/sm/GCThread.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rts/sm/GCThread.h b/rts/sm/GCThread.h
index 748b068..be7bfbb 100644
--- a/rts/sm/GCThread.h
+++ b/rts/sm/GCThread.h
@@ -122,7 +122,7 @@ typedef struct gc_thread_ {
     OSThreadId id;                 // The OS thread that this struct belongs to
     SpinLock   gc_spin;
     SpinLock   mut_spin;
-    volatile StgWord8 wakeup;
+    volatile StgWord wakeup;
 #endif
     nat thread_index;              // a zero based index identifying the thread
     rtsBool idle;                  // sitting out of this GC cycle