Re: [PATCH 1/3] MIPS: R6: Use lightweight SYNC instruction in smp_* memory barriers

From	Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/3] MIPS: R6: Use lightweight SYNC instruction in smp_* memory barriers
Date	2015-06-03 04:00 +0200
Message-ID	<px68i-2Kb-3@gated-at.bofh.it> (permalink)
References	<pwHWi-PX-15@gated-at.bofh.it> <pwHWi-PX-13@gated-at.bofh.it> <pwRVD-73I-1@gated-at.bofh.it> <pwX50-6oK-21@gated-at.bofh.it> <px4g9-8sG-13@gated-at.bofh.it>
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On 06/02/2015 04:56 PM, David Daney wrote:
> On 06/02/2015 09:15 AM, Maciej W. Rozycki wrote:
>> On Tue, 2 Jun 2015, James Hogan wrote:
>>
>>>
>>> binutils appears to support the sync_mb, sync_rmb, sync_wmb aliases
>>> since version 2.21. Can we safely use them?
>>
>>   I suggest that we don't -- we still officially support binutils 
>> 2.12 and
>> have other places where we even use `.word' to insert instructions 
>> current
>> versions of binutils properly handle.  It may be worth noting in a 
>> comment
>> though that these encodings correspond to these operations that you 
>> named.
>>
>
> Surely the other MIPSr6 instructions are not supported in binutils 
> 2.12 either.  So if it is for r6, why not require modern tools, and 
> put something user readable in here?
>
>
No, it can be used for MIPS R2 also.

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Re: [PATCH 1/3] MIPS: R6: Use lightweight SYNC instruction in smp_*  memory barriers David Daney <ddaney.cavm@gmail.com> - 2015-06-03 02:00 +0200
  Re: [PATCH 1/3] MIPS: R6: Use lightweight SYNC instruction in smp_*  memory barriers Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> - 2015-06-03 04:00 +0200

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