Re: [PATCH v5 12/16] PCI: Add pci_iomap_host_shared(), pci_iomap_host_shared_range()

Andi Kleen
2021-10-12T18:39:37Z

On 10/12/2021 11:36 AM, Reshetova, Elena wrote:
>> The 5.15 tree has something like ~2.4k IO accesses (including MMIO and
>> others) in init functions that also register drivers (thanks Elena for
>> the number)
> To provide more numbers on this. What I can see so far from a smatch-based
> analysis, we have 409 __init style functions (.probe & builtin/module_
> _platform_driver_probe excluded) for 5.15 with allyesconfig. The number of
> distinct individual IO reads (MSRs included) is much higher than 2.4k and on the
> range of 30k because quite often there are more than a single IO read in the
> same source function. The full list of accesses and the possible call paths is huge
> for manually looking at, but here is the list of the 409 functions if anyone wants
> to take a look:

Thanks Elena.

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

-Andi