cifs: abstract out function to marshal up the iovec array for async writes

We'll need to do something a bit different depending on the caller.
Abstract the code that marshals the page array into an iovec.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index cbf09cdd42a7..57ce6f834220 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -490,6 +490,8 @@ struct cifs_writedata {
         pid_t                           pid;
         unsigned int                    bytes;
         int                             result;
+        void (*marshal_iov) (struct kvec *iov,
+                             struct cifs_writedata *wdata);
         unsigned int                    nr_pages;
         struct page                     *pages[1];
 };