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Mon, 12 May 2025 07:52:30 -0700 (PDT) Message-ID: <66feb171-f528-44e8-990a-ad0c85fa52fd@suse.com> Date: Mon, 12 May 2025 16:52:29 +0200 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 v2 4/6] modpost: Create modalias for builtin modules To: Alexey Gladkov Cc: Luis Chamberlain , Sami Tolvanen , Daniel Gomez , Masahiro Yamada , Nathan Chancellor , Nicolas Schier , linux-kernel@vger.kernel.org, linux-modules@vger.kernel.org, linux-kbuild@vger.kernel.org References: <20250509164237.2886508-5-legion@kernel.org> Content-Language: en-US From: Petr Pavlu In-Reply-To: <20250509164237.2886508-5-legion@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 5/9/25 18:42, Alexey Gladkov wrote: > For some modules, modalias is generated using the modpost utility and > the section is added to the module file. > > When a module is added inside vmlinux, modpost does not generate > modalias for such modules and the information is lost. > > As a result kmod (which uses modules.builtin.modinfo in userspace) > cannot determine that modalias is handled by a builtin kernel module. > > $ cat /sys/devices/pci0000:00/0000:00:14.0/modalias > pci:v00008086d0000A36Dsv00001043sd00008694bc0Csc03i30 > > $ modinfo xhci_pci > name: xhci_pci > filename: (builtin) > license: GPL > file: drivers/usb/host/xhci-pci > description: xHCI PCI Host Controller Driver > > Missing modalias "pci:v*d*sv*sd*bc0Csc03i30*" which will be generated by > modpost if the module is built separately. > > To fix this it is necessary to generate the same modalias for vmlinux as > for the individual modules. Fortunately '.vmlinux.export.o' is already > generated from which '.modinfo' can be extracted in the same way as for > vmlinux.o. > > Signed-off-by: Masahiro Yamada > Signed-off-by: Alexey Gladkov Reviewed-by: Petr Pavlu -- Petr