vscsiif.h: replace PAGE_SIZE with VSCSIIF_PAGE_SIZE

Do not reference PAGE_SIZE directly: it could be undefined, or it could
have different values in the frontend or in the backend.

Define VSCSIIF_PAGE_SIZE as 4096, assuming all users of vscsiif.h have
4K page granularity. Replace PAGE_SIZE with VSCSIIF_PAGE_SIZE.

Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
master commit: d93539cc486aa6022195305dbea5fe12f90b69fe
master date: 2016-10-21 09:58:16 +0100

diff --git a/xen/include/public/io/vscsiif.h b/xen/include/public/io/vscsiif.h
index 7a1db058c93be140071f84b813ca6391ccae267d..ff5496d4fe74eaa2011a633cd8ab3f52f9ef1551 100644 (file)
--- a/xen/include/public/io/vscsiif.h
+++ b/xen/include/public/io/vscsiif.h
@@ -179,6 +179,7 @@
  */
 #define VSCSIIF_MAX_COMMAND_SIZE         16
 #define VSCSIIF_SENSE_BUFFERSIZE         96
+#define VSCSIIF_PAGE_SIZE              4096
 
 struct scsiif_request_segment {
     grant_ref_t gref;
@@ -187,7 +188,7 @@ struct scsiif_request_segment {
 };
 typedef struct scsiif_request_segment vscsiif_segment_t;
 
-#define VSCSIIF_SG_PER_PAGE (PAGE_SIZE / sizeof(struct scsiif_request_segment))
+#define VSCSIIF_SG_PER_PAGE (VSCSIIF_PAGE_SIZE / sizeof(struct scsiif_request_segment))
 
 /* Size of one request is 252 bytes */
 struct vscsiif_request {