104 static int build_changeset_next_level(struct overlay_changeset *ovcs,
161 static int overlay_notify(struct overlay_changeset *ovcs,  in overlay_notify()  argument
167 	ovcs->notify_state = action;  in overlay_notify()
169 	for (i = 0; i < ovcs->count; i++) {  in overlay_notify()
170 		struct fragment *fragment = &ovcs->fragments[i];  in overlay_notify()
202 		struct overlay_changeset *ovcs, const struct property *prop)  in dup_and_fixup_symbol_prop()  argument
226 	fragment_node = __of_find_node_by_path(ovcs->overlay_root, path + 1);  in dup_and_fixup_symbol_prop()
231 	for (k = 0; k < ovcs->count; k++) {  in dup_and_fixup_symbol_prop()
232 		fragment = &ovcs->fragments[k];  in dup_and_fixup_symbol_prop()
236 	if (k >= ovcs->count)  in dup_and_fixup_symbol_prop()
304 static int add_changeset_property(struct overlay_changeset *ovcs,  in add_changeset_property()  argument
343 		new_prop = dup_and_fixup_symbol_prop(ovcs, overlay_prop);  in add_changeset_property()
356 		ret = of_changeset_add_property(&ovcs->cset, target->np,  in add_changeset_property()
359 		ret = of_changeset_update_property(&ovcs->cset, target->np,  in add_changeset_property()
405 static int add_changeset_node(struct overlay_changeset *ovcs,  in add_changeset_node()  argument
438 		ret = of_changeset_attach_node(&ovcs->cset, tchild);  in add_changeset_node()
445 		ret = build_changeset_next_level(ovcs, &target_child, node);  in add_changeset_node()
455 		ret = build_changeset_next_level(ovcs, &target_child, node);  in add_changeset_node()
477 static int build_changeset_next_level(struct overlay_changeset *ovcs,  in build_changeset_next_level()  argument
484 		ret = add_changeset_property(ovcs, target, prop, 0);  in build_changeset_next_level()
493 		ret = add_changeset_node(ovcs, target, child);  in build_changeset_next_level()
507 static int build_changeset_symbols_node(struct overlay_changeset *ovcs,  in build_changeset_symbols_node()  argument
515 		ret = add_changeset_property(ovcs, target, prop, 1);  in build_changeset_symbols_node()
526 static int find_dup_cset_node_entry(struct overlay_changeset *ovcs,  in find_dup_cset_node_entry()  argument
538 	list_for_each_entry_continue(ce_2, &ovcs->cset.entries, node) {  in find_dup_cset_node_entry()
559 static int find_dup_cset_prop(struct overlay_changeset *ovcs,  in find_dup_cset_prop()  argument
572 	list_for_each_entry_continue(ce_2, &ovcs->cset.entries, node) {  in find_dup_cset_prop()
605 static int changeset_dup_entry_check(struct overlay_changeset *ovcs)  in changeset_dup_entry_check()  argument
610 	list_for_each_entry(ce_1, &ovcs->cset.entries, node) {  in changeset_dup_entry_check()
611 		dup_entry |= find_dup_cset_node_entry(ovcs, ce_1);  in changeset_dup_entry_check()
612 		dup_entry |= find_dup_cset_prop(ovcs, ce_1);  in changeset_dup_entry_check()
630 static int build_changeset(struct overlay_changeset *ovcs)  in build_changeset()  argument
640 	if (ovcs->symbols_fragment)  in build_changeset()
641 		fragments_count = ovcs->count - 1;  in build_changeset()
643 		fragments_count = ovcs->count;  in build_changeset()
646 		fragment = &ovcs->fragments[i];  in build_changeset()
650 		ret = build_changeset_next_level(ovcs, &target,  in build_changeset()
659 	if (ovcs->symbols_fragment) {  in build_changeset()
660 		fragment = &ovcs->fragments[ovcs->count - 1];  in build_changeset()
664 		ret = build_changeset_symbols_node(ovcs, &target,  in build_changeset()
673 	return changeset_dup_entry_check(ovcs);  in build_changeset()
742 static int init_overlay_changeset(struct overlay_changeset *ovcs,  in init_overlay_changeset()  argument
761 	if (!of_node_check_flag(ovcs->overlay_root, OF_DYNAMIC))  in init_overlay_changeset()
764 	if (!of_node_check_flag(ovcs->overlay_root, OF_DETACHED))  in init_overlay_changeset()
767 	if (!of_node_is_root(ovcs->overlay_root))  in init_overlay_changeset()
773 	for_each_child_of_node(ovcs->overlay_root, node) {  in init_overlay_changeset()
781 	node = of_get_child_by_name(ovcs->overlay_root, "__symbols__");  in init_overlay_changeset()
792 	ovcs->fragments = fragments;  in init_overlay_changeset()
795 	for_each_child_of_node(ovcs->overlay_root, node) {  in init_overlay_changeset()
817 	node = of_get_child_by_name(ovcs->overlay_root, "__symbols__");  in init_overlay_changeset()
819 		ovcs->symbols_fragment = 1;  in init_overlay_changeset()
840 	ovcs->count = cnt;  in init_overlay_changeset()
850 static void free_overlay_changeset(struct overlay_changeset *ovcs)  in free_overlay_changeset()  argument
854 	if (ovcs->cset.entries.next)  in free_overlay_changeset()
855 		of_changeset_destroy(&ovcs->cset);  in free_overlay_changeset()
857 	if (ovcs->id) {  in free_overlay_changeset()
858 		idr_remove(&ovcs_idr, ovcs->id);  in free_overlay_changeset()
859 		list_del(&ovcs->ovcs_list);  in free_overlay_changeset()
860 		ovcs->id = 0;  in free_overlay_changeset()
864 	for (i = 0; i < ovcs->count; i++) {  in free_overlay_changeset()
865 		of_node_put(ovcs->fragments[i].target);  in free_overlay_changeset()
866 		of_node_put(ovcs->fragments[i].overlay);  in free_overlay_changeset()
868 	kfree(ovcs->fragments);  in free_overlay_changeset()
880 	if (ovcs->notify_state == OF_OVERLAY_INIT ||  in free_overlay_changeset()
881 	    ovcs->notify_state == OF_OVERLAY_POST_REMOVE) {  in free_overlay_changeset()
882 		kfree(ovcs->overlay_mem);  in free_overlay_changeset()
883 		kfree(ovcs->new_fdt);  in free_overlay_changeset()
885 	kfree(ovcs);  in free_overlay_changeset()
917 static int of_overlay_apply(struct overlay_changeset *ovcs,  in of_overlay_apply()  argument
922 	ret = of_resolve_phandles(ovcs->overlay_root);  in of_overlay_apply()
926 	ret = init_overlay_changeset(ovcs, base);  in of_overlay_apply()
930 	ret = overlay_notify(ovcs, OF_OVERLAY_PRE_APPLY);  in of_overlay_apply()
934 	ret = build_changeset(ovcs);  in of_overlay_apply()
939 	ret = __of_changeset_apply_entries(&ovcs->cset, &ret_revert);  in of_overlay_apply()
949 	ret = __of_changeset_apply_notify(&ovcs->cset);  in of_overlay_apply()
954 	ret_tmp = overlay_notify(ovcs, OF_OVERLAY_POST_APPLY);  in of_overlay_apply()
993 	struct overlay_changeset *ovcs;  in of_overlay_fdt_apply()  local
1012 	ovcs = kzalloc_obj(*ovcs);  in of_overlay_fdt_apply()
1013 	if (!ovcs)  in of_overlay_fdt_apply()
1024 	ovcs->id = idr_alloc(&ovcs_idr, ovcs, 1, 0, GFP_KERNEL);  in of_overlay_fdt_apply()
1025 	if (ovcs->id <= 0) {  in of_overlay_fdt_apply()
1026 		ret = ovcs->id;  in of_overlay_fdt_apply()
1030 	INIT_LIST_HEAD(&ovcs->ovcs_list);  in of_overlay_fdt_apply()
1031 	list_add_tail(&ovcs->ovcs_list, &ovcs_list);  in of_overlay_fdt_apply()
1032 	of_changeset_init(&ovcs->cset);  in of_overlay_fdt_apply()
1043 	ovcs->new_fdt = new_fdt;  in of_overlay_fdt_apply()
1049 					    &ovcs->overlay_root);  in of_overlay_fdt_apply()
1055 	ovcs->overlay_mem = overlay_mem;  in of_overlay_fdt_apply()
1057 	ret = of_overlay_apply(ovcs, base);  in of_overlay_fdt_apply()
1064 	*ret_ovcs_id = ovcs->id;  in of_overlay_fdt_apply()
1068 	free_overlay_changeset(ovcs);  in of_overlay_fdt_apply()
1104 	struct overlay_changeset *ovcs;  in node_overlaps_later_cs()  local
1107 	list_for_each_entry_reverse(ovcs, &ovcs_list, ovcs_list) {  in node_overlaps_later_cs()
1108 		if (ovcs == remove_ovcs)  in node_overlaps_later_cs()
1111 		list_for_each_entry(ce, &ovcs->cset.entries, node) {  in node_overlaps_later_cs()
1114 					__func__, remove_ovcs->id, ovcs->id,  in node_overlaps_later_cs()
1120 					__func__, remove_ovcs->id, ovcs->id,  in node_overlaps_later_cs()
1190 	struct overlay_changeset *ovcs;  in of_overlay_remove()  local
1204 	ovcs = idr_find(&ovcs_idr, *ovcs_id);  in of_overlay_remove()
1205 	if (!ovcs) {  in of_overlay_remove()
1211 	if (!overlay_removal_is_ok(ovcs)) {  in of_overlay_remove()
1216 	ret = overlay_notify(ovcs, OF_OVERLAY_PRE_REMOVE);  in of_overlay_remove()
1221 	ret = __of_changeset_revert_entries(&ovcs->cset, &ret_apply);  in of_overlay_remove()
1228 	ret = __of_changeset_revert_notify(&ovcs->cset);  in of_overlay_remove()
1240 	ret_tmp = overlay_notify(ovcs, OF_OVERLAY_POST_REMOVE);  in of_overlay_remove()
1245 	free_overlay_changeset(ovcs);  in of_overlay_remove()
1271 	struct overlay_changeset *ovcs, *ovcs_n;  in of_overlay_remove_all()  local
1275 	list_for_each_entry_safe_reverse(ovcs, ovcs_n, &ovcs_list, ovcs_list) {  in of_overlay_remove_all()
1276 		ret = of_overlay_remove(&ovcs->id);  in of_overlay_remove_all()