Re: [PATCH 3/6] struct page: add field for vm_struct

[Kees Cook]

On Thu, Feb 1, 2018 at 11:42 PM, Igor Stoppa <igor.stoppa@xxxxxxxxxx> wrote:
> On 01/02/18 02:00, Christopher Lameter wrote:
>> Would it not be better to use compound page allocations here?
>> page_head(whatever) gets you the head page where you can store all sorts
>> of information about the chunk of memory.
>
> Can you please point me to this function/macro? I don't seem to be able
> to find it, at least not in 4.15

IIUC, he means PageHead(), which is also hard to grep for, since it is
a constructed name, via Page##uname in include/linux/page-flags.h:

__PAGEFLAG(Head, head, PF_ANY) CLEARPAGEFLAG(Head, head, PF_ANY)

-Kees

-- 
Kees Cook
Pixel Security