Merge branch 'for-linus-37rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

[~andy/linux] / include / xen / grant_table.h

diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h
index f19fff8650e93075aae1717034f29898f1199646..aecee9d112cbe6aea2532652c8c3f768bb829cce 100644 (file)
--- a/include/xen/grant_table.h
+++ b/include/xen/grant_table.h
@@ -190,4 +190,16 @@ int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops,
                      struct gnttab_map_grant_ref *kunmap_ops,
                      struct page **pages, unsigned int count);
 
+/* Perform a batch of grant map/copy operations. Retry every batch slot
+ * for which the hypervisor returns GNTST_eagain. This is typically due
+ * to paged out target frames.
+ *
+ * Will retry for 1, 2, ... 255 ms, i.e. 256 times during 32 seconds.
+ *
+ * Return value in each iand every status field of the batch guaranteed
+ * to not be GNTST_eagain.
+ */
+void gnttab_batch_map(struct gnttab_map_grant_ref *batch, unsigned count);
+void gnttab_batch_copy(struct gnttab_copy *batch, unsigned count);
+
 #endif /* __ASM_GNTTAB_H__ */