linux-kernel - Re: [PATCH v8 4/5] tty: serial: handle HAS

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Message-ID: <alpine.DEB.2.21.2410131553340.40463@angie.orcam.me.uk>
Date: Sun, 13 Oct 2024 15:53:48 +0100 (BST)
From: "Maciej W. Rozycki" <macro@...am.me.uk>
To: Niklas Schnelle <schnelle@...ux.ibm.com>
cc: Brian Cain <bcain@...cinc.com>, Marcel Holtmann <marcel@...tmann.org>, 
    Luiz Augusto von Dentz <luiz.dentz@...il.com>, 
    Patrik Jakobsson <patrik.r.jakobsson@...il.com>, 
    Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
    Maxime Ripard <mripard@...nel.org>, 
    Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, 
    Simona Vetter <simona@...ll.ch>, Dave Airlie <airlied@...hat.com>, 
    Gerd Hoffmann <kraxel@...hat.com>, 
    Lucas De Marchi <lucas.demarchi@...el.com>, 
    Thomas Hellström <thomas.hellstrom@...ux.intel.com>, 
    Rodrigo Vivi <rodrigo.vivi@...el.com>, 
    Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
    Jiri Slaby <jirislaby@...nel.org>, Arnd Bergmann <arnd@...db.de>, 
    Heiko Carstens <hca@...ux.ibm.com>, linux-kernel@...r.kernel.org, 
    linux-hexagon@...r.kernel.org, linux-bluetooth@...r.kernel.org, 
    dri-devel@...ts.freedesktop.org, virtualization@...ts.linux.dev, 
    spice-devel@...ts.freedesktop.org, intel-xe@...ts.freedesktop.org, 
    linux-serial@...r.kernel.org, linux-arch@...r.kernel.org, 
    Arnd Bergmann <arnd@...nel.org>
Subject: Re: [PATCH v8 4/5] tty: serial: handle HAS_IOPORT dependencies

On Tue, 8 Oct 2024, Niklas Schnelle wrote:

> In a future patch HAS_IOPORT=n will disable inb()/outb() and friends at
> compile time. We thus need to add HAS_IOPORT as dependency for those
> drivers using them unconditionally. Some 8250 serial drivers support
> MMIO only use, so fence only the parts requiring I/O ports and print an
> error message if a device can't be supported with the current
> configuration.
> 
> Co-developed-by: Arnd Bergmann <arnd@...nel.org>
> Signed-off-by: Arnd Bergmann <arnd@...nel.org>
> Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com>
> ---

Reviewed-by: Maciej W. Rozycki <macro@...am.me.uk>

  Maciej