md/bitmap: separate out loading a bitmap from initialising the structures.
dm makes this distinction between ->ctr and ->resume, so we need to
too.
Also get the new bitmap_load to clear out the bitmap first, as this is
most consistent with the dm suspend/resume approach
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/bitmap.h b/drivers/md/bitmap.h
index a7a1113..e872a7b 100644
--- a/drivers/md/bitmap.h
+++ b/drivers/md/bitmap.h
@@ -254,6 +254,7 @@
/* these are used only by md/bitmap */
int bitmap_create(mddev_t *mddev);
+int bitmap_load(mddev_t *mddev);
void bitmap_flush(mddev_t *mddev);
void bitmap_destroy(mddev_t *mddev);