summaryrefslogtreecommitdiff
path: root/include/linux/dm-kcopyd.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/dm-kcopyd.h')
-rw-r--r--include/linux/dm-kcopyd.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/dm-kcopyd.h b/include/linux/dm-kcopyd.h
index 298d587e349b..5e54458e920f 100644
--- 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 */