Re: [PATCH] char: lack of bool string made CONFIG_DEVPORT always on

From	Josh Triplett <josh@joshtriplett.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH] char: lack of bool string made CONFIG_DEVPORT always on
Date	2016-12-14 11:00 +0100
Message-ID	<sOevU-4RP-33@gated-at.bofh.it> (permalink)
References	<sO6eZ-8pC-7@gated-at.bofh.it> <sO6yl-8vr-1@gated-at.bofh.it> <sOdJw-4BA-21@gated-at.bofh.it> <sOdTc-4EN-33@gated-at.bofh.it>
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On Wed, Dec 14, 2016 at 10:11:19AM +0100, Arnd Bergmann wrote:
> On Wednesday, December 14, 2016 9:58:53 AM CET Geert Uytterhoeven wrote:
> > >
> > > --- a/drivers/char/Kconfig
> > > +++ b/drivers/char/Kconfig
> > > @@ -589,10 +589,13 @@ config TELCLOCK
> > >           controlling the behavior of this hardware.
> > >
> > >  config DEVPORT
> > > -       bool
> > > +       bool "/dev/port character device"
> > 
> > bool "/dev/port character device" if EXPERT?
> 
> I think the 'default y' is good enough, there are good reasons
> even for non-EXPERT configurations to turn this off.

Agreed. /dev/port seems like something the majority of modern systems
can safely turn off.

Thread

[PATCH] char: lack of bool string made CONFIG_DEVPORT always on Max <jbires@google.com> - 2016-12-14 01:40 +0100
  Re: [PATCH] char: lack of bool string made CONFIG_DEVPORT always on Greg KH <gregkh@linuxfoundation.org> - 2016-12-14 02:10 +0100
    [PATCH] char: lack of bool string made CONFIG_DEVPORT always on Max <jbires@google.com> - 2016-12-14 02:30 +0100
      Re: [PATCH] char: lack of bool string made CONFIG_DEVPORT always on Geert Uytterhoeven <geert@linux-m68k.org> - 2016-12-14 10:10 +0100
        Re: [PATCH] char: lack of bool string made CONFIG_DEVPORT always on Arnd Bergmann <arnd@arndb.de> - 2016-12-14 10:20 +0100
          Re: [PATCH] char: lack of bool string made CONFIG_DEVPORT always on Josh Triplett <josh@joshtriplett.org> - 2016-12-14 11:00 +0100
            Re: [PATCH] char: lack of bool string made CONFIG_DEVPORT always on Arnd Bergmann <arnd@arndb.de> - 2017-01-02 21:50 +0100
  [PATCH] char: lack of bool string made CONFIG_DEVPORT always on Max Bires <jbires@google.com> - 2017-01-03 14:00 +0100
    Re: [PATCH] char: lack of bool string made CONFIG_DEVPORT always on Greg KH <gregkh@linuxfoundation.org> - 2017-01-03 15:00 +0100
  [PATCH] Without a bool string present, using "# CONFIG_DEVPORT is not set" in defconfig files would not actually unset devport. This esnured that /dev/port was always on, but there are reasons a user may wish to disable it (smaller kernel, attack surface reduction) if it's not being used. Adding a message here in order to make this user visible. Max Bires <jbires@google.com> - 2017-01-03 15:30 +0100
    Re: [PATCH] Without a bool string present, using "# CONFIG_DEVPORT  is not set" in defconfig files would not actually unset devport. This  esnured that /dev/port was always on, but there are reasons a user may wish  to disable it (smaller kernel, attack surface reduction) if it's not being  used. Adding a message here in order to make this user visible. Greg KH <gregkh@linuxfoundation.org> - 2017-01-03 15:40 +0100
    [PATCH] char: lack of bool string made CONFIG_DEVPORT always on Max Bires <jbires@google.com> - 2017-01-03 17:30 +0100

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