From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Fri, 31 Aug 2018 10:53:51 +0100 Subject: Patch "asm-generic/bitops/lock.h: Rewrite using atomic_fetch_" causes kernel crash In-Reply-To: References: <20180830094411.GX24124@hirez.programming.kicks-ass.net> <20180830095148.GB5942@arm.com> <1535629996.4465.44.camel@synopsys.com> <20180830141713.GN24082@hirez.programming.kicks-ass.net> <20180830142354.GB13005@arm.com> <20180830142920.GO24082@hirez.programming.kicks-ass.net> <20180830204515.GC24124@hirez.programming.kicks-ass.net> List-ID: Message-ID: <20180831095351.GD13166@arm.com> To: linux-snps-arc@lists.infradead.org On Fri, Aug 31, 2018@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