ALIGN_PAGE_SIZE
psize = get_aligned_page(size + ALIGN_PAGE_SIZE -1);
blk = __snd_util_memblk_new(hdr, psize * ALIGN_PAGE_SIZE, p->prev);
#define get_aligned_page(offset) ((offset) / ALIGN_PAGE_SIZE)
#define aligned_page_offset(page) ((page) * ALIGN_PAGE_SIZE)