rem: if (init_cache_for_device(fDevice, numBlocks) == B_OK) { fCached = true; return B_OK; }  return B_ERROR;
add: return block_cache_create(fDevice, numBlocks, blockSize);
context: DeviceOpener::InitCache(off_t numBlocks){	if (init_cache_for_device(fDevice, numBlocks) == B_OK) {		fCached = true;		return B_OK;	}	return B_ERROR;}