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[82.69.66.36]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4859207c28fsm24763666f8f.5.2026.09.07.13.23.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Sep 2026 13:23:09 -0700 (PDT) Date: Mon, 7 Sep 2026 21:23:08 +0100 From: David Laight To: =?UTF-8?B?w5ZtZXI=?= Mete Kaya Cc: oneukum@suse.com, netdev@vger.kernel.org, linux-usb@vger.kernel.org Subject: Re: [PATCH net v2] usbnet: fix smp_processor_id() use in preemptible context Message-ID: <20260907212308.420701cf@pumpkin> In-Reply-To: <20260907185408.660755-1-omermetekaya0@gmail.com> References: <6e0dbfed-cadd-4274-8165-886725413d0f@suse.com> <20260907185408.660755-1-omermetekaya0@gmail.com> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Mon, 7 Sep 2026 21:52:20 +0300 =C3=96mer Mete Kaya wrote: > Hi Oliver, >=20 > Thank you for the review. You are right. >=20 > I used local_irq_save()/restore() thinking that softirq writers could > race on tstats. After checking the tstats update paths, I agreed that > preemption protection is sufficient for these accesses. >=20 >=20 > I will send v3 using preempt_disable()/preempt_enable() as suggested. Shouldn't you use get_cpu_ptr() and put_cpu_ptr() ? David >=20 > Best regards, >=20 > =C3=96mer Mete Kaya >=20