Re: [PATCH] random32: Use rcuidle variant for tracepoint

[peterz]

On Fri, Aug 21, 2020 at 08:30:43AM +0200, Marco Elver wrote:
> With KCSAN enabled, prandom_u32() may be called from any context,
> including idle CPUs.
> 
> Therefore, switch to using trace_prandom_u32_rcuidle(), to avoid various
> issues due to recursion and lockdep warnings when KCSAN and tracing is
> enabled.

At some point we're going to have to introduce noinstr to idle as well.
But until that time this should indeed cure things.