linux-kernel - RE: [PATCH v5 12/16] PCI: Add pci_iomap_host_shared(), pci_iomap_host_shared

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Message-ID: <DM8PR11MB57505C520763DF706309E177E7B69@DM8PR11MB5750.namprd11.prod.outlook.com>
Date:   Tue, 12 Oct 2021 18:57:46 +0000
From:   "Reshetova, Elena" <elena.reshetova@...el.com>
To:     Andi Kleen <ak@...ux.intel.com>,
        "Williams, Dan J" <dan.j.williams@...el.com>,
        "Michael S. Tsirkin" <mst@...hat.com>
CC:     Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        "Lutomirski, Andy" <luto@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Richard Henderson <rth@...ddle.net>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        James E J Bottomley <James.Bottomley@...senpartnership.com>,
        Helge Deller <deller@....de>,
        "David S . Miller" <davem@...emloft.net>,
        Arnd Bergmann <arnd@...db.de>,
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        Sean Christopherson <seanjc@...gle.com>,
        Kuppuswamy Sathyanarayanan <knsathya@...nel.org>,
        X86 ML <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
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Subject: RE: [PATCH v5 12/16] PCI: Add pci_iomap_host_shared(),
 pci_iomap_host_shared_range()


> I suspect the true number is even higher because that doesn't include IO
> inside calls to other modules and indirect pointers, correct?

Actually everything should be included. Smatch has cross-function db and
I am using it for getting the call chains and it follows function pointers.
Also since I am starting from a list of individual read IOs, every single
base read IO in drivers/* should be covered as far as I can see. But if it uses
some weird IO wrappers then the actual list might be higher.