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Re: [PATCH 0/2] xen/list: some fixes in list.h
- To: Juergen Gross <jgross@xxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 17 Feb 2025 10:52:21 +0100
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- Cc: oleksii.kurochko@xxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 17 Feb 2025 09:52:37 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 16.02.2025 11:23, Juergen Gross wrote:
> Patch 1 is a fix for an undefined behavior reported by Andrew. I think
> this patch should be considered for 4.20.
>
> Patch 2 is fixing wrong comments in list.h I stumbled over when doing
> patch 1. As it is absolutely no risk involved with this patch, I think
> it should be 4.20 material, too.
>
> There are some additional cleanups possible in list.h, which I can do
> for 4.21 when wanted:
>
> - Removal of list_prepare_entry(), which seems to be unused since
> some time now (and it seems to be thought of as a list.h internal
> macro only).
>
> - More questionable: removal of unused iterators, like e.g.
> list_for_each_entry_continue() or list_for_each_entry_from(). The main
> idea to keep list.h in sync with the Linux version would be violated
> by this removal, though.
That's true for the unused list_prepare_entry(), too, isn't it? Which in
turn is coupled with list_for_each_entry_continue().
> OTOH with patch 1 they are out of sync anyway
> now, but I'm planning to submit a Linux kernel patch fixing the UB in
> the Linux variant, too.
I'd go with whatever the Linux side is going accept.
Jan
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