[Xen-changelog] [xen-unstable] hvmloader: clear the whole shared-info page when shutting down xenbus

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1279808365 -3600
# Node ID bba5ac2066c8dc2896ba6253813a06de74309c23
# Parent  e8dbc1262f52f0d710dc73e43aafc42ed9d7e31b
hvmloader: clear the whole shared-info page when shutting down xenbus
since the contents might be in the wrong word-size for later users.

Signed-off-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
---
 tools/firmware/hvmloader/xenbus.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff -r e8dbc1262f52 -r bba5ac2066c8 tools/firmware/hvmloader/xenbus.c
--- a/tools/firmware/hvmloader/xenbus.c Wed Jul 21 09:02:10 2010 +0100
+++ b/tools/firmware/hvmloader/xenbus.c Thu Jul 22 15:19:25 2010 +0100
@@ -63,9 +63,8 @@ void xenbus_shutdown(void)
      * having used the rings. */
     memset(rings, 0, sizeof *rings);
 
-    /* Clear the xenbus event-channel too */
-    get_shared_info()->evtchn_pending[event / sizeof (unsigned long)]
-        &= ~(1UL << ((event % sizeof (unsigned long))));    
+    /* Clear the event-channel state too. */
+    memset(get_shared_info(), 0, PAGE_SIZE);
 
     rings = NULL;
 }

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