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Subject: Re: [PATCH v4 1/2] compiler, atomics: Provide READ_ONCE_NOKSAN()
To: Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@kernel.org>
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CC: <linux-kernel@vger.kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
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From: Andrey Ryabinin <aryabinin@virtuozzo.com>
Message-ID: <5620E66F.6050406@virtuozzo.com>
Date: Fri, 16 Oct 2015 14:58:39 +0300
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On 10/16/2015 01:33 PM, Borislav Petkov wrote:
> On Fri, Oct 16, 2015 at 12:44:53PM +0300, Andrey Ryabinin wrote:
>> Some code may perform racy by design memory reads. This could be
>> harmless, yet such code may produce KASAN warnings.
>>
>> To hide such accesses from KASAN this patch introduces
>> READ_ONCE_NOKSAN() macro. KASAN will not check the memory
>> accessed by READ_ONCE_NOKSAN(). The KernelThreadSanitizer (KTSAN)
>> is going to ignore it as well.
> 
> Frankly, the "NOKSAN" suffix is too specific. I know, I know, I'm
> bikeshedding but what happens if yet another tool wants to be disabled
> from checking there and that tool is not *SAN? We rename again?
> 
> So the "NOCHECK" suffix made much more sense, even if it was generic.
> IMNSVHO.
> 

Sounds reasonable.
Ingo, what do you think?

> Thanks.
>