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Date: Wed, 29 Mar 2017 10:21:16 +0200 From: Dmitry Vyukov <dvyukov@...gle.com> To: Matthew Wilcox <willy@...radead.org> Cc: Mark Rutland <mark.rutland@....com>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, Will Deacon <will.deacon@....com>, Andrey Ryabinin <aryabinin@...tuozzo.com>, kasan-dev <kasan-dev@...glegroups.com>, LKML <linux-kernel@...r.kernel.org>, "x86@...nel.org" <x86@...nel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org> Subject: Re: [PATCH 4/8] asm-generic: add atomic-instrumented.h On Tue, Mar 28, 2017 at 11:35 PM, Matthew Wilcox <willy@...radead.org> wrote: > On Tue, Mar 28, 2017 at 06:15:41PM +0200, Dmitry Vyukov wrote: >> The new header allows to wrap per-arch atomic operations >> and add common functionality to all of them. > > Why a new header instead of putting this in linux/atomic.h? Only a subset of archs include this header. If we pre-include it for all arches without changing their atomic.h, we will break build. We of course play some tricks with preprocessor. It's also large enough to put into a separate header IMO. Also a reasonable question: why put it into linux/atomic.h instead of a new header? :)
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