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Date: Fri, 24 Jun 2016 12:35:36 -0700 From: Davidlohr Bueso <dave@...olabs.net> To: KY Srinivasan <kys@...rosoft.com> Cc: James Bottomley <James.Bottomley@...senPartnership.com>, "peterz@...radead.org" <peterz@...radead.org>, "mingo@...nel.org" <mingo@...nel.org>, "davem@...emloft.net" <davem@...emloft.net>, "cw00.choi@...sung.com" <cw00.choi@...sung.com>, "dougthompson@...ssion.com" <dougthompson@...ssion.com>, "bp@...en8.de" <bp@...en8.de>, "mchehab@....samsung.com" <mchehab@....samsung.com>, "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>, "pfg@....com" <pfg@....com>, "jikos@...nel.org" <jikos@...nel.org>, "hans.verkuil@...co.com" <hans.verkuil@...co.com>, "awalls@...metrocast.net" <awalls@...metrocast.net>, "dledford@...hat.com" <dledford@...hat.com>, "sean.hefty@...el.com" <sean.hefty@...el.com>, "heiko.carstens@...ibm.com" <heiko.carstens@...ibm.com>, "sumit.semwal@...aro.org" <sumit.semwal@...aro.org>, "schwidefsky@...ibm.com" <schwidefsky@...ibm.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH -tip 00/12] locking/atomics: Add and use inc,dec calls for FETCH-OP flavors On Fri, 24 Jun 2016, KY Srinivasan wrote: >How so? Can you expand on the racy part. The subtraction is done on a local copy of >the value. Yeah, you're right. I took a look at the generated code and I was unnecessarily worried about the window between the return value and the subtraction. Thanks, Davidlohr
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