On Wed, Oct 14, 2015 at 6:20 PM, Peter Zijlstra <pet...@infradead.org> wrote:
> On Wed, Oct 14, 2015 at 06:18:58PM +0200, Dmitry Vyukov wrote:
>>
>> Well, if another thread writes it byte-by-byte, it pretty much does
>> not matter how you read it.
>> Note that I said "at least one access is not atomic". If both are
>> atomic, then this is, of course, legal. And KTSAN considers
>> READ/WRITE_ONCE as atomic operations.
>
> OK, then I'm confused on what exactly the annotation does, but less
> worried.
The plan is to make READ_ONCE_NOCHECK ignored by KTSAN, just it is
ignored by KASAN. So that it never leads to a report ("not checked").
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