diff options
Diffstat (limited to 'drivers/block/xen-blkback/common.h')
| -rw-r--r-- | drivers/block/xen-blkback/common.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/block/xen-blkback/common.h b/drivers/block/xen-blkback/common.h index 7a03e07f52f3..45a044a53d1e 100644 --- a/drivers/block/xen-blkback/common.h +++ b/drivers/block/xen-blkback/common.h @@ -44,6 +44,7 @@ #include <xen/interface/io/blkif.h> #include <xen/interface/io/protocols.h> +extern unsigned int xen_blkif_max_ring_order; /* * This is the maximum number of segments that would be allowed in indirect * requests. This value will also be passed to the frontend. @@ -248,7 +249,7 @@ struct backend_info; #define PERSISTENT_GNT_WAS_ACTIVE 1 /* Number of requests that we can fit in a ring */ -#define XEN_BLKIF_REQS 32 +#define XEN_BLKIF_REQS_PER_PAGE 32 struct persistent_gnt { struct page *page; @@ -320,6 +321,7 @@ struct xen_blkif { struct work_struct free_work; /* Thread shutdown wait queue. */ wait_queue_head_t shutdown_wq; + unsigned int nr_ring_pages; }; struct seg_buf { |