Re: [PATCH 46/50] preempt.h: Kill dependency on list.h

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On Sat, Dec 16, 2023 at 04:04:43PM -0800, Randy Dunlap wrote:
> 
> 
> On 12/16/23 14:35, Kent Overstreet wrote:
> > On Sat, Dec 16, 2023 at 06:13:41AM +0000, Matthew Wilcox wrote:
> >> On Fri, Dec 15, 2023 at 10:35:47PM -0500, Kent Overstreet wrote:
> >>> -	INIT_HLIST_NODE(&notifier->link);
> >>> +	/* INIT_HLIST_NODE() open coded, to avoid dependency on list.h */
> >>> +	notifier->link.next = NULL;
> >>> +	notifier->link.pprev = NULL;
> >>
> >> Arguably INIT_HLIST_NODE() belongs in types.h -- we already have
> >> RCUREF_INIT() and ATOMIC_INIT() in there.
> > 
> > I think I'd prefer to keep types.h as minimal as possible - as soon as
> > we start putting non type stuff in there people won't know what the
> > distinction is and it'll grow.
> > 
> > preempt.h is a bit unusual too, normally we'd just split out a _types.h
> > header there but it's not so easy to split up usefully.
> > 
> 
> I don't feel like I have NAK power, but if I did, I would NAK
> open coding of INIT_HLIST_HEAD() or anything like it.
> I would expect some $maintainer to do likewise, but I could be
> surprised.

It's INIT_HLIST_HEAD(), there's approximately zero chance of the
implementation changing, and there's a comment.




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