Re: [PATCH 14/19] rcu/context-tracking: Move RCU-dynticks internal functions to context_tracking

[Peter Zijlstra]

On Wed, Mar 02, 2022 at 04:48:05PM +0100, Frederic Weisbecker wrote:
> +noinstr unsigned long rcu_dynticks_inc(int incby)
> +{
> +	return arch_atomic_add_return(incby, this_cpu_ptr(&context_tracking.dynticks));
> +}

noinstr implies noinline, making the above a rather sad little function;
would it perhaps be better to make it __always_inline ?

Also; I could imagine myself doing an arch special for this such that
x86 generates:

	LOCK XADD	[reg], %gs:[var]

But that's for later I suppose, it would be but a little tweak to
perpcu_add_return_op()