Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/hwspinlock

[firefly-linux-kernel-4.4.55.git] / include / linux / dm-kcopyd.h

diff --git a/include/linux/dm-kcopyd.h b/include/linux/dm-kcopyd.h
index 312513d4741a706cdf2377069e1f98c5fdd225fd..47d9d376e4e7a9e0cecb609065b3d735825cfdb9 100644 (file)
--- a/include/linux/dm-kcopyd.h
+++ b/include/linux/dm-kcopyd.h
@@ -25,7 +25,7 @@
  * To use kcopyd you must first create a dm_kcopyd_client object.
  */
 struct dm_kcopyd_client;
-int dm_kcopyd_client_create(struct dm_kcopyd_client **result);
+struct dm_kcopyd_client *dm_kcopyd_client_create(void);
 void dm_kcopyd_client_destroy(struct dm_kcopyd_client *kc);
 
 /*
@@ -42,5 +42,24 @@ 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);
+
+int dm_kcopyd_zero(struct dm_kcopyd_client *kc,
+                  unsigned num_dests, struct dm_io_region *dests,
+                  unsigned flags, dm_kcopyd_notify_fn fn, void *context);
+
 #endif /* __KERNEL__ */
 #endif /* _LINUX_DM_KCOPYD_H */