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-rw-r--r--drivers/virtio/virtio_balloon.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 1f157d2f4952..d0fd8f8dc6ed 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -974,6 +974,11 @@ static int virtballoon_probe(struct virtio_device *vdev)
/*
* Let the hypervisor know that we are expecting a
* specific value to be written back in balloon pages.
+ *
+ * If the PAGE_POISON value was larger than a byte we would
+ * need to byte swap poison_val here to guarantee it is
+ * little-endian. However for now it is a single byte so we
+ * can pass it as-is.
*/
if (!want_init_on_free())
memset(&poison_val, PAGE_POISON, sizeof(poison_val));