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Date: Fri, 22 Apr 2016 08:53:49 +0200 From: Ingo Molnar <mingo@...nel.org> To: Peter Zijlstra <peterz@...radead.org> Cc: Michal Hocko <mhocko@...nel.org>, LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...hat.com>, Thomas Gleixner <tglx@...utronix.de>, "H. Peter Anvin" <hpa@...or.com>, "David S. Miller" <davem@...emloft.net>, Tony Luck <tony.luck@...el.com>, Andrew Morton <akpm@...ux-foundation.org>, Chris Zankel <chris@...kel.net>, Max Filippov <jcmvbkbc@...il.com>, x86@...nel.org, linux-alpha@...r.kernel.org, linux-ia64@...r.kernel.org, linux-s390@...r.kernel.org, linux-sh@...r.kernel.org, sparclinux@...r.kernel.org, linux-xtensa@...ux-xtensa.org, linux-arch@...r.kernel.org, Josh Poimboeuf <jpoimboe@...hat.com> Subject: Re: [PATCH 10/11] x86, rwsem: provide __down_write_killable * Peter Zijlstra <peterz@...radead.org> wrote: > On Wed, Apr 13, 2016 at 02:49:43PM +0200, Michal Hocko wrote: > > On Wed 13-04-16 12:27:31, Ingo Molnar wrote: > > > > > > * Ingo Molnar <mingo@...nel.org> wrote: > > > > > > > I'm testing your patches today, if they are otherwise OK [...] > > > > > > got this build failure: > > > > > > ./arch/x86/include/asm/rwsem.h:106:2: error: ‘asm’ operand has impossible constraints > > > > Hmm, I have no idea why 64b didn't have problem with the asm but 32b > > complains. Anyway, the following makes both happy. I have checked the > > generated code for 64b and it hasn't changed after the patch. 32b also > > seems to be generating a proper code. My gcc asm()-foo is rather weak so > > I would feel better if somebody double checked after me. > > I completely blow at this gcc-asm constraints thing too :/ > > In any case, Ingo will you look after the rest of these patches, or do > you want me to pick up the remaining bits? Yeah, it's on my list! Thanks, Ingo
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