From 7e44480218bb1cbd85d90bf68f35ea28421d460e Mon Sep 17 00:00:00 2001
From: Simon Peyton Jones <simonpj@microsoft.com>
Date: Wed, 2 Oct 2013 13:57:41 +0100
Subject: Tiny comment on the change from StgWord8 to StgWord

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

(limited to 'rts')

diff --git a/rts/sm/GCThread.h b/rts/sm/GCThread.h
index 4b96fec7f8..12ef999a9b 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 StgWord wakeup;
+    volatile StgWord wakeup;       // NB not StgWord8; only StgWord is guaranteed atomic
 #endif
     nat thread_index;              // a zero based index identifying the thread
     rtsBool idle;                  // sitting out of this GC cycle
-- 
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