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[34.168.217.79]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a9521eb87fsm33865195ad.71.2026.02.06.15.14.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Feb 2026 15:14:51 -0800 (PST) Date: Fri, 6 Feb 2026 23:14:46 +0000 From: David Matlack To: "Yanjun.Zhu" Cc: Alex Williamson , Adithya Jayachandran , Alexander Graf , Alex Mastro , Alistair Popple , Andrew Morton , Ankit Agrawal , Bjorn Helgaas , Chris Li , David Rientjes , Jacob Pan , Jason Gunthorpe , Jason Gunthorpe , Jonathan Corbet , Josh Hilke , Kevin Tian , kexec@lists.infradead.org, kvm@vger.kernel.org, Leon Romanovsky , Leon Romanovsky , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, Lukas Wunner , =?utf-8?Q?Micha=C5=82?= Winiarski , Mike Rapoport , Parav Pandit , Pasha Tatashin , Pranjal Shrivastava , Pratyush Yadav , Raghavendra Rao Ananta , Rodrigo Vivi , Saeed Mahameed , Samiullah Khawaja , Shuah Khan , Thomas =?iso-8859-1?Q?Hellstr=F6m?= , Tomita Moeko , Vipin Sharma , Vivek Kasireddy , William Tu , Yi Liu Subject: Re: [PATCH v2 04/22] vfio/pci: Register a file handler with Live Update Orchestrator Message-ID: References: <20260129212510.967611-1-dmatlack@google.com> <20260129212510.967611-5-dmatlack@google.com> <6dc423bd-36e6-4f97-b2b2-c7030575a3a1@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <6dc423bd-36e6-4f97-b2b2-c7030575a3a1@linux.dev> On 2026-02-06 02:37 PM, Yanjun.Zhu wrote: > On 1/29/26 1:24 PM, David Matlack wrote: > > +int __init vfio_pci_liveupdate_init(void) > > +{ > > + if (!liveupdate_enabled()) > > + return 0; > 813 int liveupdate_register_file_handler(struct liveupdate_file_handler *fh) > 814 { > 815         struct liveupdate_file_handler *fh_iter; > 816         int err; > 817 > 818         if (!liveupdate_enabled()) > > 819                 return -EOPNOTSUPP; > > In the function liveupdate_register_file_handler, liveupdate_enabled is also checked. > as such, it is not necessary to check here? Yeah that is a bit odd. I see that memfd_luo_init() just checks for -EOPNOTSUPP. We can do the same thing here.