From c6c8e3aae67c1a402c0d929c6b99e314454429e4 Mon Sep 17 00:00:00 2001 From: "kaf24@firebug.cl.cam.ac.uk" Date: Fri, 2 Dec 2005 13:16:13 +0100 Subject: [PATCH] Add padding to ring headers for future expansion. Signed-off-by: Keir Fraser --- xen/include/public/io/ring.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/xen/include/public/io/ring.h b/xen/include/public/io/ring.h index 6f1df572d3..d509181ae0 100644 --- a/xen/include/public/io/ring.h +++ b/xen/include/public/io/ring.h @@ -71,6 +71,7 @@ union __name##_sring_entry { \ struct __name##_sring { \ RING_IDX req_prod, req_event; \ RING_IDX rsp_prod, rsp_event; \ + uint8_t pad[48]; \ union __name##_sring_entry ring[1]; /* variable-length */ \ }; \ \ @@ -114,6 +115,7 @@ typedef struct __name##_back_ring __name##_back_ring_t #define SHARED_RING_INIT(_s) do { \ (_s)->req_prod = (_s)->rsp_prod = 0; \ (_s)->req_event = (_s)->rsp_event = 1; \ + memset((_s)->pad, 0, sizeof((_s)->pad)); \ } while(0) #define FRONT_RING_INIT(_r, _s, __size) do { \ -- 2.30.2