NODE_SIZE
indexes = kvcalloc(total, NODE_SIZE, GFP_KERNEL);
#define KEYS_PER_NODE (NODE_SIZE / sizeof(sector_t))
struct xfs_iext_node *node = xfs_iext_alloc_node(NODE_SIZE);
struct xfs_iext_node *new = xfs_iext_alloc_node(NODE_SIZE);
struct xfs_iext_leaf *new = xfs_iext_alloc_node(NODE_SIZE);
new_size = NODE_SIZE;
KEYS_PER_NODE = NODE_SIZE / (sizeof(uint64_t) + sizeof(void *)),
RECS_PER_LEAF = (NODE_SIZE - (2 * sizeof(struct xfs_iext_leaf *))) /