On Wed, Oct 14, 2015 at 09:23:33AM -0700, Andy Lutomirski wrote: > On Wed, Oct 14, 2015 at 9:20 AM, 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 annotation says "hey, KASAN (etc), don't worry if you think that > the memory being accessed is out of bounds". Presumably KTSAN is okay > with the operation because it's atomic, but KASAN dislikes it because > it's accessing memory that is out of bounds from the perspective of a > C program.
There's going to be more of that.. > I'd still rather find a way to just delete get_wchan, but whatever. :-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
