Messages in this thread | | | Date | Mon, 2 Feb 2015 18:12:13 -0500 | From | Christoph Jaeger <> | Subject | Re: [PATCH linux-next] lib: Kconfig: use bool instead of boolean |
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On Mon, Feb 02, 2015 at 02:27:32PM -0800, Andrew Morton wrote: > On Mon, 2 Feb 2015 09:59:16 -0500 Christoph Jaeger <cj@linux.com> wrote: > > > Keyword 'boolean' for type definition attributes is considered > > deprecated and, therefore, should not be used anymore. > > > > See http://lkml.kernel.org/r/cover.1418003065.git.cj@linux.com > > See http://lkml.kernel.org/r/1419108071-11607-1-git-send-email-cj@linux.com > > > > ... > > > > --- a/lib/Kconfig > > +++ b/lib/Kconfig > > @@ -14,7 +14,7 @@ config BITREVERSE > > tristate > > > > config HAVE_ARCH_BITREVERSE > > - boolean > > + bool > > default n > > depends on BITREVERSE > > help > > Your patch patches 556d2f055bf6d ("ARM: 8187/1: add > CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction") which appears > in linux-next via the ARM tree.
Oh, sorry, yes; it should be applied by the ARM folks to their tree then, of course.
Cheers, Christoph
> There are many uses of "boolean" in lib/Kconfig. Converting just one > of them is inefficient and odd. > > 556d2f055bf6d is a bit of a surprise. It looks good to me from a > non-ARM perspective - the __builtin_constant_p() optimisation is > sensible, although bitrev on a constant probably isn't very common. > > I'm not sure about the ARM part though! __bitrev8() is pretty damn > fast. Presumably an inlined rbit instruction is faster still, but not > very much? > > The Kconfig help text in 556d2f055bf6d rather needs some caring for.
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