pa_to_block
block = pa_to_block(pa);
block = pa_to_block(memdesc->head_addr);
*pa_to_block(memdesc->head_addr) = nblock;
block = pa_to_block(bpa);
block = pa_to_block(bpa);
next = pa_to_block(block->next);
*pa_to_block(block->next) = nblock;
*pa_to_block(block->next) = nblock;
block = pa_to_block(pa);
block = pa_to_block(pa);
next = pa_to_block(memdesc->head_addr);
pa_to_block(memdesc->head_addr)->size,
prev = pa_to_block(prevpa);
prev = pa_to_block(prevpa);
next = pa_to_block(prev->next);
block = pa_to_block(pa);
next = pa_to_block(prev->next);
next = pa_to_block(prev->next);
block = pa_to_block(blockaddr);