for (l = mdp->aligned_blocks; l != NULL; l = l->next) {
if (l->aligned == ptr) {
l->aligned = NULL; /* Mark the slot in the list as free. */
for (l = mdp->aligned_blocks; l != NULL; l = l->next) {
if (l->aligned == ptr) {
l->aligned = NULL; /* Mark the slot in the list as free. */