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From:   Michael Ellerman <mpe@ellerman.id.au>
To:     Segher Boessenkool <segher@kernel.crashing.org>
Cc:     Leonardo Bras <leonardo@linux.ibm.com>,
        Paul Mackerras <paulus@samba.org>,
        linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH] Replaces long number representation by BIT() macro
In-Reply-To: <20190702164850.GP18316@gate.crashing.org>
References: <20190613180227.29558-1-leonardo@linux.ibm.com> <87imskihvd.fsf@concordia.ellerman.id.au> <20190702161635.GO18316@gate.crashing.org> <20190702164850.GP18316@gate.crashing.org>
Date:   Sun, 07 Jul 2019 23:15:34 +1000
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Segher Boessenkool <segher@kernel.crashing.org> writes:
> On Tue, Jul 02, 2019 at 11:16:35AM -0500, Segher Boessenkool wrote:
>> On Wed, Jul 03, 2019 at 01:19:34AM +1000, Michael Ellerman wrote:
>> > What we could do is switch to the `UL` macro from include/linux/const.h,
>> > rather than using our own ASM_CONST.
>> 
>> You need gas 2.28 or later for that though.
>
> Oh, but apparently I cannot read.  That macro should work fine.

:)

Yeah one day we'll be able to drop them entirely, but not yet.

The official minimum is 2.20:
  https://www.kernel.org/doc/html/latest/process/changes.html


But my "old" toolchain is binutils 2.22, so that's effectively the
minimum for anything I test. I'm not sure many people are actually
testing with 2.20.

cheers