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Date:   Wed, 1 Jun 2022 02:38:34 +0200
From:   Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
To:     Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= <toke@redhat.com>
Cc:     kernel test robot <lkp@intel.com>, kbuild-all@lists.01.org,
        linux-kernel@vger.kernel.org,
        Daniel Borkmann <daniel@iogearbox.net>,
        "Paul E . McKenney" <paulmck@kernel.org>
Subject: Re: kernel/bpf/devmap.c:1030:40: sparse: sparse: cast removes
 address space '__rcu' of expression
Message-ID: <20220601003834.ilvx2pik672yxuxt@mail>
References: <202205222029.xpW3PM1y-lkp@intel.com>
 <87y1yspmmh.fsf@toke.dk>
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On Mon, May 23, 2022 at 12:30:14PM +0200, Toke H?iland-J?rgensen wrote:
> kernel test robot <lkp@intel.com> writes:
> 
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > head:   eaea45fc0e7b6ae439526b4a41d91230c8517336
> > commit: 782347b6bcad07ddb574422e01e22c92e05928c8 xdp: Add proper __rcu annotations to redirect map entries
> > date:   11 months ago
> > config: ia64-randconfig-s031-20220522 (https://download.01.org/0day-ci/archive/20220522/202205222029.xpW3PM1y-lkp@intel.com/config)
> > compiler: ia64-linux-gcc (GCC) 11.3.0
> 
> Hmm, so this is ia64-only? Some kind of macro breakage? Paul, any ideas?

Hi,

It's surely IA64's cmpxchg() which contains lines like:
	_r_ = ia64_cmpxchg8_##sem((__u64 *) ptr, new, _o_); 

-- Luc