lkml.org 
[lkml]   [2015]   [Nov]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug

* Kees Cook <keescook@chromium.org> wrote:

> On Mon, Nov 23, 2015 at 9:12 AM, Dan Williams <dan.j.williams@intel.com> wrote:
> > On Mon, Nov 23, 2015 at 12:12 AM, Ingo Molnar <mingo@kernel.org> wrote:
> >>
> >> * Dan Williams <dan.j.williams@intel.com> wrote:
> >>
> >>> Let all the archs that implement CONFIG_STRICT_DEVM use a common
> >>> definition in lib/Kconfig.debug.
> >>
> >> For the x86 bit:
> >>
> >> Acked-by: Ingo Molnar <mingo@kernel.org>
> >>
> >>> Note, the 'depends on !SPARC' is due to sparc not implementing
> >>> devmem_is_allowed().
> >>
> >> Maybe that should be converted into a helper Kconfig switch for architectures to
> >> opt in to /dev/mem restrictions?
> >
> > Sure, easy enough to add a ARCH_HAS_DEVMEM_IS_ALLOWED opt-in.
>
> Is there some hidden meaning about the difference between ARCH_HAS_...
> and HAVE_ARCH_... and HAVE_... ?

There's also the double underscore variants such as __HAVE_ARCH_STRNCASECMP! ;-)

It's all just nonsensical historic muck: because no-one ever was confronted with
the messy global picture.

Today you can run Documentation/features/list-arch.sh and wonder at the zoo of
options ;-)

Thanks,

Ingo


\
 
 \ /
  Last update: 2015-11-24 09:41    [W:1.120 / U:0.380 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site