Re: [1/4] standardize bit waiting data type

Andrew Morton
2004-08-28T06:42:24Z

William Lee Irwin III <wli@holomorphy.com> wrote:
>
> William Lee Irwin III <wli@holomorphy.com> wrote:
> >> void fastcall unlock_page(struct page *page)
> >> {
> >> + unsigned long *word = (unsigned long *)&page->flags;
>
> On Fri, Aug 27, 2004 at 11:17:13PM -0700, Andrew Morton wrote:
> > This will break if a little-endian 64-bit architecture elects to use a
> > 32-bit page_flags_t.
>
> You mean a big-endian one? I did check to be sure none did so; only
> x86-64 does. Easy enough to dress up so BE arches can do it too.
>

hm. Actually, the page_flags_t hack can only work on little-endian
hardware anyway.

perhaps your implementation should imitate x86_64/bitops.h and use a void*,
along with apologetic comments.