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([2600:4040:9399:4000:e553:72e5:7d37:c7ef]) by smtp.gmail.com with ESMTPSA id af79cd13be357-936ce22b36asm63089485a.39.2026.08.13.12.57.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 13 Aug 2026 12:57:37 -0700 (PDT) Message-ID: <522517bd-869c-442d-81c8-c0236563a925@gmail.com> Date: Thu, 13 Aug 2026 15:57:36 -0400 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net] psp: use unrcu_pointer() for the cmpxchg() on netdev psp_dev To: Wei Wang , kuba@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Wei Wang , kernel test robot References: <20260813193416.1544518-1-weibunny.kernel@gmail.com> Content-Language: en-US From: Daniel Zahka In-Reply-To: <20260813193416.1544518-1-weibunny.kernel@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 8/13/26 3:34 PM, Wei Wang wrote: > From: Wei Wang > > sparse reports: > > net/psp/psp_nl.c:513:13: sparse: sparse: cast removes address space > '__rcu' of expression > > cmpxchg() returns typeof(*ptr) and its internal casts strip the __rcu > annotation. Wrap it in unrcu_pointer(), the documented way to use an > __rcu pointer with xchg() and friends. > > This was introduced by commit 06c2dce2d0f6 ("psp: add new netlink cmd > for dev-assoc and dev-disassoc"). > > No functional change intended. > > Reported-by: kernel test robot > Closes: https://lore.kernel.org/oe-kbuild-all/202608080910.l9KvOH7O-lkp@intel.com/ > Signed-off-by: Wei Wang Commits targeting the net tree need a fixes tag.