[CIFS] Fix trivial sparse warning with asyn i/o patch

Signed-off-by: Steve French <sfrench@us.ibm.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index daaaca8..460d87b 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -2114,7 +2114,7 @@
 
 	/* marshal up the pages into iov array */
 	for (i = 0; i < wdata->nr_pages; i++) {
-		iov[i + 1].iov_len = min(bytes, PAGE_SIZE);
+		iov[i + 1].iov_len = min_t(size_t, bytes, PAGE_SIZE);
 		iov[i + 1].iov_base = kmap(wdata->pages[i]);
 		bytes -= iov[i + 1].iov_len;
 	}