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Subject: Re: [PATCH 1/2] [PING] Optimize generic spinlock code and use C11
 like atomic macros.
From: Torvald Riegel <triegel@redhat.com>
To: Joseph Myers <joseph@codesourcery.com>
Cc: Stefan Liebler <stli@linux.vnet.ibm.com>, libc-alpha@sourceware.org
Date: Thu, 01 Jun 2017 14:33:00 -0000
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On Thu, 2017-06-01 at 13:39 +0000, Joseph Myers wrote:
> On Wed, 31 May 2017, Torvald Riegel wrote:
> 
> > > Nobody answered for these archs:
> > > -alpha: #define ATOMIC_EXCHANGE_USES_CAS 1
> > > -arm: #define ATOMIC_EXCHANGE_USES_CAS 1
> > > -hppa: #define ATOMIC_EXCHANGE_USES_CAS 1
> > > -ia64: #define ATOMIC_EXCHANGE_USES_CAS 0
> > > -m68k: #define ATOMIC_EXCHANGE_USES_CAS 1
> > > -microblaze: #define ATOMIC_EXCHANGE_USES_CAS 1
> > > -nios2: #define ATOMIC_EXCHANGE_USES_CAS 1
> > > -sh: #define ATOMIC_EXCHANGE_USES_CAS 1
> > > -sparc: #define ATOMIC_EXCHANGE_USES_CAS 1
> > 
> > Joseph, can you clarify for arm?
> 
> You already answered for ARM 
> <https://sourceware.org/ml/libc-alpha/2017-04/msg00109.html>.
> 

What I wrote there was just my understanding, and I wasn't sure.  I'll
assume that you are saying that this is indeed correct.  If so, the
patch should remove the XXX comment.