[PATCH v2 2/2] vscsiif.h: replace PAGE_SIZE with VSCSIIF_PAGE_SIZE

[Stefano Stabellini <sstabellini@kernel.org>]

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>
---
 xen/include/public/io/vscsiif.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xen/include/public/io/vscsiif.h b/xen/include/public/io/vscsiif.h
index 0a4709f..d0bd3b5 100644
--- a/xen/include/public/io/vscsiif.h
+++ b/xen/include/public/io/vscsiif.h
@@ -248,6 +248,7 @@
  */
 #define VSCSIIF_MAX_COMMAND_SIZE         16
 #define VSCSIIF_SENSE_BUFFERSIZE         96
+#define VSCSIIF_PAGE_SIZE              4096
 
 struct scsiif_request_segment {
     grant_ref_t gref;
@@ -256,7 +257,7 @@ 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 {
-- 
1.9.1


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