On Fri, May 15, 2020 at 01:55:43PM +0000, David Laight wrote: > From: Peter Zijlstra > > Sent: 14 May 2020 15:25 > .. > > Exact same requirements, KASAN even has the data_race() problem through > > READ_ONCE_NOCHECK(), UBSAN doesn't and might be simpler because of it. > > What happens if you implement READ_ONCE_NOCHECK() with an > asm() statement containing a memory load? > > Is that enough to kill all the instrumentation?
You'll have to implement it for all archs, but yes, I think that ought to work.
