linux-kernel - Re: [PATCH v3 03/38] char: impi, tpm: depend on HAS

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Date:   Tue, 14 Mar 2023 15:17:20 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Niklas Schnelle <schnelle@...ux.ibm.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Corey Minyard <minyard@....org>,
        Peter Huewe <peterhuewe@....de>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-pci@...r.kernel.org, Arnd Bergmann <arnd@...nel.org>,
        openipmi-developer@...ts.sourceforge.net,
        linux-integrity@...r.kernel.org
Subject: Re: [PATCH v3 03/38] char: impi, tpm: depend on HAS_IOPORT

Hi Niklas,

On Tue, Mar 14, 2023 at 1:12 PM Niklas Schnelle <schnelle@...ux.ibm.com> wrote:
> In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
> not being declared. We thus need to add this dependency and ifdef
> sections of code using inb()/outb() as alternative access methods.
>
> Co-developed-by: Arnd Bergmann <arnd@...nel.org>
> Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com>

Thanks for your patch!

> --- a/drivers/char/Kconfig
> +++ b/drivers/char/Kconfig
> @@ -34,6 +34,7 @@ config TTY_PRINTK_LEVEL
>  config PRINTER
>         tristate "Parallel printer support"
>         depends on PARPORT
> +       depends on HAS_IOPORT

This looks wrong to me.
drivers/char/lp.c uses the parport API, no direct I/O port access.

>         help
>           If you intend to attach a printer to the parallel port of your Linux
>           box (as opposed to using a serial printer; if the connector at the

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds