mm: make HASHED_PAGE_VIRTUAL page_address' struct page argument const.

[linux-2.6-microblaze.git] / include / linux / dm-kcopyd.h

diff --git a/include/linux/dm-kcopyd.h b/include/linux/dm-kcopyd.h
index 298d587..5e54458 100644 (file)
--- a/include/linux/dm-kcopyd.h
+++ b/include/linux/dm-kcopyd.h
@@ -42,5 +42,20 @@ int dm_kcopyd_copy(struct dm_kcopyd_client *kc, struct dm_io_region *from,
                   unsigned num_dests, struct dm_io_region *dests,
                   unsigned flags, dm_kcopyd_notify_fn fn, void *context);
 
+/*
+ * Prepare a callback and submit it via the kcopyd thread.
+ *
+ * dm_kcopyd_prepare_callback allocates a callback structure and returns it.
+ * It must not be called from interrupt context.
+ * The returned value should be passed into dm_kcopyd_do_callback.
+ *
+ * dm_kcopyd_do_callback submits the callback.
+ * It may be called from interrupt context.
+ * The callback is issued from the kcopyd thread.
+ */
+void *dm_kcopyd_prepare_callback(struct dm_kcopyd_client *kc,
+                                dm_kcopyd_notify_fn fn, void *context);
+void dm_kcopyd_do_callback(void *job, int read_err, unsigned long write_err);
+
 #endif /* __KERNEL__ */
 #endif /* _LINUX_DM_KCOPYD_H */