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Date: Fri, 31 Aug 2018 10:53:51 +0100 From: Will Deacon <will.deacon@....com> To: Vineet Gupta <Vineet.Gupta1@...opsys.com> Cc: Peter Zijlstra <peterz@...radead.org>, Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>, "mingo@...nel.org" <mingo@...nel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Alexey.Brodkin@...opsys.com" <Alexey.Brodkin@...opsys.com>, "tglx@...utronix.de" <tglx@...utronix.de>, "linux-snps-arc@...ts.infradead.org" <linux-snps-arc@...ts.infradead.org>, "yamada.masahiro@...ionext.com" <yamada.masahiro@...ionext.com>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org> Subject: Re: Patch "asm-generic/bitops/lock.h: Rewrite using atomic_fetch_" causes kernel crash On Fri, Aug 31, 2018 at 12:30:50AM +0000, Vineet Gupta wrote: > On 08/30/2018 01:45 PM, Peter Zijlstra wrote: > >> > >> Indeed this is the mother of all issues, I tried and system is clearly hosed with > >> and works after. > >> What's amazing is the commit 4aef66c8ae9 which introduced it is from 2016 ;-) > >> Back then we had a retry branch with backoff stuff which I'd reverted for new > >> cores and the merge conflict somehow missed it. > >> > >> @PeterZ I'll create a patch with you as author ? do I need any formal sign offs, > >> acks etc ? > > Well, Will spotted it, give authorship to him, you have my ack per the > > above. > > Oops, sorry for the mixup. I have him as author now and pushed to ARC for-curr > (will trickle into linux-next eventually). Okey doke: you can have my Signed-off-by for all the diffs I sent. Just stick something like [vineet: wrote commit message] in there so I don't read it in the future and confuse myself. Will
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