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From: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>
To: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
Cc: Hitoshi Mitake
	<mitake.hitoshi-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>,
	Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>,
	iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
	tchalamarla-M3mlKVOIwJVv6pq1l3V1OdBPR1lH4CV8@public.gmane.org,
	brian.starkey-5wv7dgnIgG8@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	Darren Hart <dvhart-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Subject: Re: [PATCH 4/7] io-64-nonatomic: Add relaxed accessor variants
Date: Mon, 25 Apr 2016 17:11:01 +0100	[thread overview]
Message-ID: <20160425161101.GC2122@arm.com> (raw)
In-Reply-To: <4658440.AyDy7GFvoa@wuerfel>

On Mon, Apr 25, 2016 at 05:41:21PM +0200, Arnd Bergmann wrote:
> On Monday 25 April 2016 16:28:01 Robin Murphy wrote:
> > >>>
> > >>> We _could_ - indeed I started doing that, but then decided that the
> > >>> obfuscation of horrible macro-templated functions wasn't worth saving a
> > >>> couple of hundred bytes in some code that isn't exactly difficult to
> > >>> maintain and has needed touching once in 4 years.
> > >>>
> > >>> If you did want to go down the macro route, I may as well also generate both
> > >>> lo-hi and hi-lo headers all from a single template, it'd be really clever...
> > >>> <alarm bells>
> > >>
> > >> I certainly wasn't suggesting any more than the obvious macroisation,
> > >> but I'll leave it up to Arnd, as I think this falls on his lap.
> > >
> > > I'd prefer the open-coded variant as well.
> > 
> > By that, do you mean sticking with the smmu_writeq() implementation in 
> > the driver and dropping this patch, or merging this patch as-is without 
> > further macro-magic?
> > 
> 
> Sorry, that was really ambiguous on my end. I meant leaving patch 4/7
> as it is in the version you posted.

I'm happy with that. Could I have your ack, so that I can queue it with
the related SMMU patches, please?

Will

WARNING: multiple messages have this Message-ID (diff)
From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 4/7] io-64-nonatomic: Add relaxed accessor variants
Date: Mon, 25 Apr 2016 17:11:01 +0100	[thread overview]
Message-ID: <20160425161101.GC2122@arm.com> (raw)
In-Reply-To: <4658440.AyDy7GFvoa@wuerfel>

On Mon, Apr 25, 2016 at 05:41:21PM +0200, Arnd Bergmann wrote:
> On Monday 25 April 2016 16:28:01 Robin Murphy wrote:
> > >>>
> > >>> We _could_ - indeed I started doing that, but then decided that the
> > >>> obfuscation of horrible macro-templated functions wasn't worth saving a
> > >>> couple of hundred bytes in some code that isn't exactly difficult to
> > >>> maintain and has needed touching once in 4 years.
> > >>>
> > >>> If you did want to go down the macro route, I may as well also generate both
> > >>> lo-hi and hi-lo headers all from a single template, it'd be really clever...
> > >>> <alarm bells>
> > >>
> > >> I certainly wasn't suggesting any more than the obvious macroisation,
> > >> but I'll leave it up to Arnd, as I think this falls on his lap.
> > >
> > > I'd prefer the open-coded variant as well.
> > 
> > By that, do you mean sticking with the smmu_writeq() implementation in 
> > the driver and dropping this patch, or merging this patch as-is without 
> > further macro-magic?
> > 
> 
> Sorry, that was really ambiguous on my end. I meant leaving patch 4/7
> as it is in the version you posted.

I'm happy with that. Could I have your ack, so that I can queue it with
the related SMMU patches, please?

Will

  reply	other threads:[~2016-04-25 16:11 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-13 17:12 [PATCH 0/7] arm-smmu: Implementation and context format differentiation Robin Murphy
2016-04-13 17:12 ` Robin Murphy
     [not found] ` <cover.1460391217.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-04-13 17:12   ` [PATCH 1/7] iommu/arm-smmu: Differentiate specific implementations Robin Murphy
2016-04-13 17:12     ` Robin Murphy
     [not found]     ` <cc1789284c5efa05514231fa3dede9d1d5f2df18.1460391217.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-04-13 21:15       ` Chalamarla, Tirumalesh
2016-04-13 21:15         ` Chalamarla, Tirumalesh
2016-04-13 17:12   ` [PATCH 2/7] iommu/arm-smmu: Convert ThunderX workaround to new method Robin Murphy
2016-04-13 17:12     ` Robin Murphy
     [not found]     ` <98b8079ee3ede4427b045214a60ba77f1cb3552c.1460391217.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-04-13 21:16       ` Chalamarla, Tirumalesh
2016-04-13 21:16         ` Chalamarla, Tirumalesh
2016-04-13 17:12   ` [PATCH 3/7] iommu/arm-smmu: Work around MMU-500 prefetch errata Robin Murphy
2016-04-13 17:12     ` Robin Murphy
     [not found]     ` <0484444b6257bfb6adb68405a72c64fc4fc98142.1460391217.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-04-21 16:15       ` Will Deacon
2016-04-21 16:15         ` Will Deacon
2016-04-21 16:16       ` Will Deacon
2016-04-21 16:16         ` Will Deacon
2016-04-13 17:13   ` [PATCH 4/7] io-64-nonatomic: Add relaxed accessor variants Robin Murphy
2016-04-13 17:13     ` Robin Murphy
     [not found]     ` <44173fd4e8efd27d670cadc6b30e215243a14099.1460391217.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-04-21 16:18       ` Will Deacon
2016-04-21 16:18         ` Will Deacon
     [not found]         ` <20160421161859.GK929-5wv7dgnIgG8@public.gmane.org>
2016-04-22 17:08           ` Robin Murphy
2016-04-22 17:08             ` Robin Murphy
     [not found]             ` <571A5A9E.7040305-5wv7dgnIgG8@public.gmane.org>
2016-04-25 13:32               ` Will Deacon
2016-04-25 13:32                 ` Will Deacon
     [not found]                 ` <20160425133242.GC30830-5wv7dgnIgG8@public.gmane.org>
2016-04-25 15:21                   ` Arnd Bergmann
2016-04-25 15:21                     ` Arnd Bergmann
2016-04-25 15:28                     ` Robin Murphy
2016-04-25 15:28                       ` Robin Murphy
     [not found]                       ` <571E3781.3070609-5wv7dgnIgG8@public.gmane.org>
2016-04-25 15:41                         ` Arnd Bergmann
2016-04-25 15:41                           ` Arnd Bergmann
2016-04-25 16:11                           ` Will Deacon [this message]
2016-04-25 16:11                             ` Will Deacon
2016-04-25 16:11       ` Arnd Bergmann
2016-04-25 16:11         ` Arnd Bergmann
2016-04-26 10:38       ` [PATCH v2] " Robin Murphy
2016-04-26 10:38         ` Robin Murphy
2016-04-13 17:13   ` [PATCH 5/7] iommu/arm-smmu: Tidy up 64-bit/atomic I/O accesses Robin Murphy
2016-04-13 17:13     ` Robin Murphy
2016-04-13 17:13   ` [PATCH 6/7] iommu/arm-smmu: Decouple context format from kernel config Robin Murphy
2016-04-13 17:13     ` Robin Murphy
     [not found]     ` <173006777218859d1671ae517c70592c6c02f630.1460391217.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-04-21 16:30       ` Will Deacon
2016-04-21 16:30         ` Will Deacon
     [not found]         ` <20160421163019.GL929-5wv7dgnIgG8@public.gmane.org>
2016-04-22 17:38           ` Robin Murphy
2016-04-22 17:38             ` Robin Murphy
     [not found]             ` <571A617C.3020102-5wv7dgnIgG8@public.gmane.org>
2016-04-25 11:02               ` Will Deacon
2016-04-25 11:02                 ` Will Deacon
     [not found]                 ` <20160425110219.GH16065-5wv7dgnIgG8@public.gmane.org>
2016-04-25 13:14                   ` Robin Murphy
2016-04-25 13:14                     ` Robin Murphy
     [not found]                     ` <571E1851.2030400-5wv7dgnIgG8@public.gmane.org>
2016-04-25 13:41                       ` Will Deacon
2016-04-25 13:41                         ` Will Deacon
     [not found]                         ` <20160425134108.GD30830-5wv7dgnIgG8@public.gmane.org>
2016-04-25 16:21                           ` Robin Murphy
2016-04-25 16:21                             ` Robin Murphy
2016-04-28 16:12       ` [PATCH v2] " Robin Murphy
2016-04-28 16:12         ` Robin Murphy
2016-04-13 17:13   ` [PATCH 7/7] iommu/arm-smmu: Support SMMUv1 64KB supplement Robin Murphy
2016-04-13 17:13     ` Robin Murphy

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