From: Will Deacon <will.deacon@arm.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org, boqun.feng@gmail.com
Subject: Re: [PATCHv2 08/11] atomics: switch to generated fallbacks
Date: Wed, 4 Jul 2018 16:28:47 +0100 [thread overview]
Message-ID: <20180704152846.GL4828@arm.com> (raw)
In-Reply-To: <20180625105952.3756-9-mark.rutland@arm.com>
On Mon, Jun 25, 2018 at 11:59:49AM +0100, Mark Rutland wrote:
> As a step to ensuring the atomic* APIs are consistent, switch to fallbacks
> generated by gen-atomic-fallback.sh.
>
> These are checked in rather than generated with Kbuild, since:
>
> * This allows inspection of the atomics with git grep and ctags on a
> pristine tree, which Linus strongly prefers being able to do.
>
> * The fallbacks are not expected to change very often, and are not
> affected by machine details or configuration options, so regenerating
> them for *every* build is somewhat wasteful.
>
> * These are included by files required *very* early in the build process
> (e.g. for generating bounds.h), and we'd rather not complicate the
> top-level Kbuild file.
Would it be worth checking that the generated output from the script doesn't
differ from the file in tree at some point during the build, and issuing a
warning if they do?
Will
next prev parent reply other threads:[~2018-07-04 15:28 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-25 10:59 [PATCHv2 00/11] atomics: generate atomic headers / instrument arm64 Mark Rutland
2018-06-25 10:59 ` [PATCHv2 01/11] atomic/tty: Fix up atomic abuse in ldsem Mark Rutland
2018-06-26 18:53 ` Andy Shevchenko
2018-06-26 19:30 ` Peter Zijlstra
2018-06-27 17:33 ` Andy Shevchenko
2018-06-25 10:59 ` [PATCHv2 02/11] atomics/x86: reduce arch_cmpxchg64*() instrumentation Mark Rutland
2018-06-25 10:59 ` [PATCHv2 03/11] atomics: simplify cmpxchg() instrumentation Mark Rutland
2018-06-25 11:38 ` Andrea Parri
2018-06-25 11:47 ` Dmitry Vyukov
2018-06-25 11:48 ` Mark Rutland
2018-06-25 10:59 ` [PATCHv2 04/11] atomics/treewide: instrument xchg() Mark Rutland
2018-06-25 10:59 ` [PATCHv2 05/11] atomics: instrument cmpxchg_double*() Mark Rutland
2018-06-25 10:59 ` [PATCHv2 06/11] atomics/treewide: rework ordering barriers Mark Rutland
2018-06-25 15:44 ` Mark Rutland
2018-07-04 15:06 ` Will Deacon
2018-07-04 15:56 ` Mark Rutland
2018-07-04 17:50 ` Will Deacon
2018-07-05 10:12 ` Mark Rutland
2018-07-05 16:25 ` Will Deacon
2018-06-25 10:59 ` [PATCHv2 07/11] atomics: add common header generation files Mark Rutland
2018-06-28 10:58 ` Mark Rutland
2018-06-28 11:46 ` Peter Zijlstra
2018-06-25 10:59 ` [PATCHv2 08/11] atomics: switch to generated fallbacks Mark Rutland
2018-07-04 15:28 ` Will Deacon [this message]
2018-07-04 16:01 ` Mark Rutland
2018-07-04 17:44 ` Will Deacon
2018-07-05 11:52 ` Mark Rutland
2018-06-25 10:59 ` [PATCHv2 09/11] atomics: switch to generated atomic-long Mark Rutland
2018-06-25 10:59 ` [PATCHv2 10/11] atomics: switch to generated instrumentation Mark Rutland
2018-06-25 10:59 ` [PATCHv2 11/11] arm64: use instrumented atomics Mark Rutland
2018-07-04 15:24 ` Will Deacon
2018-07-04 16:37 ` Mark Rutland
2018-07-04 17:41 ` Will Deacon
2018-07-05 9:58 ` Mark Rutland
2018-06-25 15:22 ` [PATCHv2 00/11] atomics: generate atomic headers / instrument arm64 Peter Zijlstra
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