linux-kernel - Re: [PATCH 09/11] PCI: add matching checks for driver

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Message-ID: <20210614160125.GK1002214@nvidia.com>
Date:   Mon, 14 Jun 2021 13:01:25 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Max Gurtovoy <mgurtovoy@...dia.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        cohuck@...hat.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, aviadye@...dia.com, oren@...dia.com,
        shahafs@...dia.com, parav@...dia.com, artemp@...dia.com,
        kwankhede@...dia.com, ACurrid@...dia.com, cjia@...dia.com,
        yishaih@...dia.com, kevin.tian@...el.com, targupta@...dia.com,
        shameerali.kolothum.thodi@...wei.com, liulongfang@...wei.com,
        yan.y.zhao@...el.com
Subject: Re: [PATCH 09/11] PCI: add matching checks for driver_override
 binding

On Mon, Jun 14, 2021 at 04:27:33PM +0100, Christoph Hellwig wrote:
> On Mon, Jun 14, 2021 at 11:18:32AM +0300, Max Gurtovoy wrote:
> >   *			into a static list of equivalent device types,
> >   *			instead of using it as a pointer.
> > + * @flags:		PCI flags of the driver. Bitmap of pci_id_flags enum.
> >   */
> >  struct pci_device_id {
> >  	__u32 vendor, device;		/* Vendor and device ID or PCI_ANY_ID*/
> >  	__u32 subvendor, subdevice;	/* Subsystem ID's or PCI_ANY_ID */
> >  	__u32 class, class_mask;	/* (class,subclass,prog-if) triplet */
> >  	kernel_ulong_t driver_data;	/* Data private to the driver */
> > +	__u32 flags;
> >  };
> 
> Isn't struct pci_device_id a userspace ABI due to MODULE_DEVICE_TABLE()?

Not that I can find, it isn't under include/uapi and the way to find
this information is by looking for symbols starting with "__mod_"

Debian Code Search says the only place with '"__mod_"' is in
file2alias.c at least

Do you know of something? If yes this file should be moved

Jason