From: "Dr. David Alan Gilbert" <dgilb...@redhat.com>
Using memcmp to compare structures wasn't safe,
as I found out on ARM when I was getting false miscompares.
Use the helper function for comparing the MRSs.
Fixes: ade6d081fc33948e56e6
Signed-off-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
---
hw/virtio/vhost.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index bc899fc60e..2ef4bc720f 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -451,8 +451,13 @@ static void vhost_commit(MemoryListener *listener)
changed = true;
} else {
/* Same size, lets check the contents */
- changed = n_old_sections && memcmp(dev->mem_sections, old_sections,
- n_old_sections * sizeof(old_sections[0])) != 0;
+ for (int i = 0; i < n_old_sections; i++) {
+ if (!MemoryRegionSection_eq(&old_sections[i],
+ &dev->mem_sections[i])) {
+ changed = true;
+ break;
+ }
+ }
}
trace_vhost_commit(dev->started, changed);
--
2.21.0
