block = off >> PAGE_CACHE_SHIFT;
node->page_offset = off & ~PAGE_CACHE_MASK;
for (i = 0; i < tree->pages_per_bnode; block++, i++) {
block = off >> PAGE_CACHE_SHIFT;
node->page_offset = off & ~PAGE_CACHE_MASK;
for (i = 0; i < tree->pages_per_bnode; block++, i++) {