kernel/cache/block_cache.cpp

76 	void*			parent_data;
372 		fHasParent(block->parent_data != NULL),
511 		_Allocate(fParent, block->parent_data);
1353 		ASSERT(block->original_data == NULL && block->parent_data == NULL);
1489 	if (block->original_data != NULL || block->parent_data != NULL) {
1491 			block->block_number, block->original_data, block->parent_data);
1542 	block->parent_data = NULL;
1562 	ASSERT(block->parent_data != NULL);
1563 	if (block->parent_data != block->current_data)
1564 		Free(block->parent_data);
1565 	block->parent_data = NULL;
1623 	if (block->parent_data != NULL)
1703 		ASSERT(block->original_data == NULL && block->parent_data == NULL);
1869 			ASSERT(block->original_data == NULL && block->parent_data == NULL);
2087 	if (block->parent_data == block->current_data) {
2089 		block->parent_data = cache->Allocate();
2090 		if (block->parent_data == NULL) {
2102 		memcpy(block->parent_data, block->current_data, cache->block_size);
2109 		&& block->parent_data == NULL && wasUnchanged)
2141 		(addr_t)block->parent_data, block->ref_count, block->LastAccess(),
2156 	kprintf(" parent data:   %p\n", block->parent_data);
2192 	set_debug_variable("_parent", (addr_t)block->parent_data);
2927 		if (block->parent_data != NULL) {
2977 		if (transaction->has_sub_transaction && block->parent_data != NULL)
3049 		if (block->parent_data != NULL) {
3055 			if (block->parent_data != block->current_data) {
3057 				block->original_data = block->parent_data;
3062 			block->parent_data = NULL;
3072 			ASSERT(block->parent_data == NULL);
3128 		if (block->parent_data == NULL) {
3160 			if (block->parent_data != block->current_data) {
3166 				memcpy(block->current_data, block->parent_data,
3168 				cache->Free(block->parent_data);
3171 			block->parent_data = NULL;
3210 		if (block->parent_data != NULL) {
3233 		block->parent_data = block->current_data;
3316 			while (block != NULL && block->parent_data == NULL)
3331 		*_data = mainOnly ? block->parent_data : block->current_data;
3573 			if (block->transaction != NULL && block->parent_data != NULL
3574 				&& block->parent_data != block->current_data) {