if (mdp->heapinfo[block].busy_frag.nfree ==
(BLOCKSIZE >> type) - 1) {
/* If all fragments of this block are free, remove this block from its swag and free the whole block. */
if (mdp->heapinfo[block].busy_frag.nfree ==
(BLOCKSIZE >> type) - 1) {
/* If all fragments of this block are free, remove this block from its swag and free the whole block. */