linux-kernel - Re: [PATCH v5 2/2] PCI: Implement custom llseek for sysfs resource entries

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Message-ID: <3dc7f3f3-b2a0-530d-9688-b725204e3270@yandex-team.ru>
Date:   Mon, 28 Aug 2023 12:22:54 +0500
From:   Valentin Sinitsyn <valesini@...dex-team.ru>
To:     kernel test robot <lkp@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Tejun Heo <tj@...nel.org>
Cc:     oe-kbuild-all@...ts.linux.dev,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Bjorn Helgaas <helgaas@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/2] PCI: Implement custom llseek for sysfs resource
 entries

Hi all,

On 25.08.2023 19:10, kernel test robot wrote:
> Hi Valentine,
> 
> kernel test robot noticed the following build warnings:
> 
[..]
> All warnings (new ones prefixed by >>):
> 
>     drivers/pci/pci-sysfs.c:1268:12: warning: no previous prototype for 'pci_create_resource_files' [-Wmissing-prototypes]
>      1268 | int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
>           |            ^~~~~~~~~~~~~~~~~~~~~~~~~
>     drivers/pci/pci-sysfs.c:1269:13: warning: no previous prototype for 'pci_remove_resource_files' [-Wmissing-prototypes]
>      1269 | void __weak pci_remove_resource_files(struct pci_dev *dev) { return; }
>           |             ^~~~~~~~~~~~~~~~~~~~~~~~~
>>> drivers/pci/pci-sysfs.c:838:15: warning: 'pci_llseek_resource' defined but not used [-Wunused-function]
>       838 | static loff_t pci_llseek_resource(struct file *filep,
>           |               ^~~~~~~~~~~~~~~~~~~
I'm not sure if I should do anything about it: arc doesn't HAVE_* 
anything PCI-related, and pci-sysfs doesn't seem to be written with this 
case in mind. Guarding pci_llseek_resource() with an #ifdef 
HAVE_AT_LEAST_SOMETHING is trivial, but it feels more like a patch to 
silence a bot than a proper fix.

Any thoughts / objections on this?

Best,
Valentine