Re: [PATCH v3 16/22] locking/atomics, kcsan: Add KCSAN instrumentation

[Peter Zijlstra]

On Wed, Feb 19, 2020 at 10:46:26AM -0500, Steven Rostedt wrote:
> On Wed, 19 Feb 2020 15:47:40 +0100
> Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> 
> > From: Marco Elver <elver@xxxxxxxxxx>
> > 
> > This adds KCSAN instrumentation to atomic-instrumented.h.
> > 
> > Signed-off-by: Marco Elver <elver@xxxxxxxxxx>
> > Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
> > [peterz: removed the actual kcsan hooks]
> > Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
> > Reviewed-by: Mark Rutland <mark.rutland@xxxxxxx>
> > ---
> >  include/asm-generic/atomic-instrumented.h |  390 +++++++++++++++---------------
> >  scripts/atomic/gen-atomic-instrumented.sh |   14 -
> >  2 files changed, 212 insertions(+), 192 deletions(-)
> > 
> 
> 
> Does this and the rest of the series depend on the previous patches in
> the series? Or can this be a series on to itself (patches 16-22)?

It can probably stand on its own, but it very much is related in so far
that it's fallout from staring at all this nonsense.

Without these the do_int3() can actually have accidental tracing before
reaching it's nmi_enter().