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Date: Wed, 25 Jun 2025 12:03:17 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Boqun Feng <boqun.feng@gmail.com>
Cc: linux-kernel@vger.kernel.org, rcu@vger.kernel.org, lkmm@lists.linux.dev,
	Ingo Molnar <mingo@kernel.org>, Will Deacon <will@kernel.org>,
	Waiman Long <longman@redhat.com>,
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Subject: Re: [PATCH 3/8] shazptr: Add refscale test for wildcard
Message-ID: <20250625100317.GC1613376@noisy.programming.kicks-ass.net>
References: <20250625031101.12555-1-boqun.feng@gmail.com>
 <20250625031101.12555-4-boqun.feng@gmail.com>
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In-Reply-To: <20250625031101.12555-4-boqun.feng@gmail.com>

On Tue, Jun 24, 2025 at 08:10:56PM -0700, Boqun Feng wrote:

> +static void ref_shazptr_wc_read_section(const int nloops)
> +{
> +	int i;
> +
> +	for (i = nloops; i >= 0; i--) {
> +		preempt_disable();
> +		{
> +			guard(shazptr)(ref_shazptr_read_section);
> +			/* Trigger wildcard logic */
> +			guard(shazptr)(ref_shazptr_wc_read_section);
> +		}
> +		preempt_enable();
> +	}
> +}
> +
> +static void ref_shazptr_wc_delay_section(const int nloops, const int udl, const int ndl)
> +{
> +	int i;
> +
> +	for (i = nloops; i >= 0; i--) {
> +		preempt_disable();
> +		{
> +			guard(shazptr)(ref_shazptr_delay_section);
> +			/* Trigger wildcard logic */
> +			guard(shazptr)(ref_shazptr_wc_delay_section);
> +			un_delay(udl, ndl);
> +		}
> +		preempt_enable();
> +	}
> +}

Same as the last one, scoped_guard (preempt) can replace the preempt
things and the scope.