linux-kernel - Re: [PATCH] ia64: fix sparse warnings with cmpxchg() & xchg()

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Date:   Mon, 06 Jun 2022 09:53:32 +0200
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Arnd Bergmann <arnd@...db.de>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] ia64: fix sparse warnings with cmpxchg() & xchg()

Luc Van Oostenryck <luc.vanoostenryck@...il.com> writes:

> On IA64, new sparse's warnings where issued after fixing
> some __rcu annotations in kernel/bpf/.
>
> These new warnings are false positives and appear on IA64 because
> on this architecture, the macros for cmpxchg() and xchg() make
> casts that ignore sparse annotations.
>
> This patch contains the minimal patch to fix this issue:
> adding a missing cast and some missing '__force'.
>
> Link: https://lore.kernel.org/r/20220601120013.bq5a3ynbkc3hngm5@mail
> Reported-by: kernel test robot <lkp@...el.com>
> Cc: Toke Høiland-Jørgensen <toke@...hat.com>
> Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@...il.com>

Ah, thank you for taking care of this! :)

Acked-by: Toke Høiland-Jørgensen <toke@...hat.com>