[Xen-devel] [PATCH] make shared ring pad field less enticing for users by adding a __ prefix

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Cc: Daniel Stodden <daniel.stodden@xxxxxxxxxx>
Cc: Dongxiao Xu <dongxiao.xu@xxxxxxxxx>

diff -r 0918ea363872 -r 15ff04882377 xen/include/public/io/ring.h
--- a/xen/include/public/io/ring.h      Thu Jul 01 11:18:21 2010 +0100
+++ b/xen/include/public/io/ring.h      Thu Jul 01 11:19:33 2010 +0100
@@ -112,7 +112,7 @@
         } tapif_user;                                                   \
         uint8_t pvt_pad[4];                                             \
     } private;                                                          \
-    uint8_t pad[44];                                                    \
+    uint8_t __pad[44];                                                  \
     union __name##_sring_entry ring[1]; /* variable-length */           \
 };                                                                      \
                                                                         \
@@ -156,7 +156,8 @@
 #define SHARED_RING_INIT(_s) do {                                       \
     (_s)->req_prod  = (_s)->rsp_prod  = 0;                              \
     (_s)->req_event = (_s)->rsp_event = 1;                              \
-    (void)memset((_s)->pad, 0, sizeof((_s)->pad));                      \
+    (void)memset((_s)->private.pvt_pad, 0, sizeof((_s)->private.pvt_pad)); \
+    (void)memset((_s)->__pad, 0, sizeof((_s)->__pad));                  \
 } while(0)
 
 #define FRONT_RING_INIT(_r, _s, __size) do {                            \

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