Re: [PATCH v4 01/17] perf: Protect perf_guest_cbs with RCU

[Paolo Bonzini]

On 11/11/21 11:47, Peter Zijlstra wrote:
> > This technically could be RCU_INIT_POINTER but it's not worth a respin.
> > There are dozens of other occurrences, and if somebody wanted they
> > could use Coccinelle to fix all of them.
> I've been pushing the other way, trying to get rid of RCU_INIT_POINTER()
> since rcu_assign_pointer(, NULL) actualy DTRT per __builtin_constant_p()
> etc.

Oh, that's pretty cool to know, thanks!

Paolo

> There's a very few sites where we use RCU_INIT_POINTER() with a !NULL
> argument, and those are 'special'.