Remove origin arguments from write barrier functionswip/nonmoving-gc

Write barriers push old values of updated field, e.g. when we have

    *q = p;

we do

    updateRemembSetPushClosure(*q, q);
    *q = p;

Here the second argument ("origin") is not useful because by the time we
do the update we invalidate "origin" (`q` is no longer origin of old
`*q`).

In general it doesn't make sense to record origins in write barriers so
we remove all origin arguments from write barriers.

Fixes #170.

1 files changed, 1 insertions, 1 deletions

diff --git a/rts/Schedule.c b/rts/Schedule.c
index 0a240559f3..2edd7503e7 100644
--- a/rts/Schedule.c
+++ b/rts/Schedule.c
@@ -2500,7 +2500,7 @@ resumeThread (void *task_)
     incall->suspended_tso = NULL;
     incall->suspended_cap = NULL;
     // we will modify tso->_link
-    updateRemembSetPushClosure(cap, (StgClosure *)tso->_link, NULL);
+    updateRemembSetPushClosure(cap, (StgClosure *)tso->_link);
     tso->_link = END_TSO_QUEUE;
 
     traceEventRunThread(cap, tso);