iopt_pages_update_pinned
int iopt_pages_update_pinned(struct iopt_pages *pages, unsigned long npages,
rc = iopt_pages_update_pinned(&tmp, npinned[account_mode], true,
iopt_pages_update_pinned(&tmp, npinned[account_mode], false,
int r = iopt_pages_update_pinned(pages, pages->npinned,
iopt_pages_update_pinned(pages, pages->last_npinned - pages->npinned,
return iopt_pages_update_pinned(pages, npages, inc, user);