On Wed, Jan 16, 2019 at 02:17:28PM -0500, Johannes Weiner wrote:

quoted

quoted

Also, you probably want to use atomic_t for g->polling, because we
(sadly) have architectures where regular stores and atomic ops don't
work 'right'.

Oh, I see. Will do. Thanks!

Yikes, that's news to me too. Good to know.

See Documentation/atomic_t.txt, specifically the atomic_set() part in
SEMANTICS.

Archs that suffer this include (but are not limited to): parisc,
sparc32-smp, something arc.

And yes, I would dearly love to kill all SMP support for architectures
like that..