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[Xen-changelog] Add padding to ring headers for future expansion.
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| Subject: | [Xen-changelog] Add padding to ring headers for future expansion. |
| From: | Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx> |
| Date: | Fri, 02 Dec 2005 13:26:07 +0000 |
| Delivery-date: | Fri, 02 Dec 2005 13:26:24 +0000 |
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# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID df68a9433492b024963334b124586f56885266fd
# Parent a21cbe9a111b58b3092db6c95a068679feba077b
Add padding to ring headers for future expansion.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
diff -r a21cbe9a111b -r df68a9433492 xen/include/public/io/ring.h
--- a/xen/include/public/io/ring.h Fri Dec 2 12:10:25 2005
+++ b/xen/include/public/io/ring.h Fri Dec 2 12:16:13 2005
@@ -71,6 +71,7 @@
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 @@
#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 { \
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