linux-kernel - Re: [PATCH v7 1/1] selftests/mm/uffd: Refactor non-composite global vars into struct

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Message-ID: <kd6uteyd4vzlnbdwzjydwd7hoqyxewc5fx24z5sq7svmtoa3oo@n57xyeu3vtyy>
Date: Thu, 28 Aug 2025 14:49:37 -0400
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
To: Brendan Jackman <jackmanb@...gle.com>
Cc: Ujwal Kundur <ujwal.kundur@...il.com>, akpm@...ux-foundation.org,
        peterx@...hat.com, david@...hat.com, lorenzo.stoakes@...cle.com,
        vbabka@...e.cz, rppt@...nel.org, surenb@...gle.com, mhocko@...e.com,
        shuah@...nel.org, linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 1/1] selftests/mm/uffd: Refactor non-composite global
 vars into struct

* Brendan Jackman <jackmanb@...gle.com> [250828 08:37]:
> On Sun Aug 17, 2025 at 6:52 AM UTC, Ujwal Kundur wrote:
> > -static void noop_alias_mapping(__u64 __unused *start, size_t __unused len,
> > -			       unsigned long __unused offset)
> > +static void noop_alias_mapping(uffd_global_test_opts_t *gopts, __u64 __unused *start,
> > +			       size_t __unused len, unsigned long __unused offset)
> 
> After a rebase this is now falling afoul of the -Wunused-parameter added
> here:
> 
> https://lore.kernel.org/all/20250731160132.1795351-5-usama.anjum@collabora.com/T/#m0449dc0d6a5ac3b1f71f7182c13b6829e1b444cf
> 
> I really don't think we want that flag, I'll comment on that thread, but
> just as an FYI here too.

I was under the impression that it was decided to drop that flag,
otherwise I would have also spoken up about it.