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Message-ID: <20151007162703.GL26924@tassilo.jf.intel.com> Date: Wed, 7 Oct 2015 09:27:03 -0700 From: Andi Kleen <ak@...ux.intel.com> To: Andrey Ryabinin <aryabinin@...tuozzo.com> Cc: Andy Lutomirski <luto@...capital.net>, Ingo Molnar <mingo@...nel.org>, Dmitry Vyukov <dvyukov@...gle.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, "x86@...nel.org" <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>, Andrey Konovalov <andreyknvl@...gle.com>, Kostya Serebryany <kcc@...gle.com>, Alexander Potapenko <glider@...gle.com>, kasan-dev <kasan-dev@...glegroups.com>, Borislav Petkov <bp@...en8.de>, Denys Vlasenko <dvlasenk@...hat.com>, Sasha Levin <sasha.levin@...cle.com>, Wolfram Gloger <wmglo@...t.med.uni-muenchen.de>, Linus Torvalds <torvalds@...ux-foundation.org>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: [PATCH] x86/process: Silence KASAN warnings in get_wchan() On Wed, Oct 07, 2015 at 11:54:42AM +0300, Andrey Ryabinin wrote: > On 10/06/2015 09:11 PM, Andy Lutomirski wrote: > > > > But what's wrong with the GCC attribute mechanism? Surely GCC ought > > to be able to generate the code, at least in the simple cases, and the > > attribute already exists. The attribute and READ_ONCE_NOCHECK seem > > like the least messy in the C code. > > The problem with 'no_sanitize_address' attribute is incompatibility with inlining. > GCC can't inline function with that attribute into function without it. > And the contrary is also true - GCC can't inline function without attribute into function with such attribute. > > Failure to inline always_inline function leads to build failure. So just don't do that? Don't set the attribute on functions marked inline. Where do you see this anyways? -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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