From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH] cpu: Make atomic callbacks run on UP with disabled interrupts
Date: Mon, 3 Nov 2025 14:10:51 +0100 [thread overview]
Message-ID: <20251103131051._qx__Noh@linutronix.de> (raw)
In-Reply-To: <20251103124254.GA3245006@noisy.programming.kicks-ass.net>
On 2025-11-03 13:42:54 [+0100], Peter Zijlstra wrote:
> How about:
>
> if (cpuhp_is_atomic_state(state)) {
> guard(irqsave)();
> ret = cpuhp_invoke_callback(cpu, state, bringup, node, NULL);
> /*
> * STARTING/DYING must not fail!
> */
> WARN_ON_ONCE(ret);
> } else {
> ret = cpuhp_invoke_callback(cpu, state, bringup, node, NULL);
> }
>
> which is a little more like cpuhp_thread_fun()
very nice indeed. What about WARN_ON_ONCE(ret && bringup) given the
BUG_ON(ret && !bringup) below?
>
Sebastian
next prev parent reply other threads:[~2025-11-03 13:10 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-03 12:03 [PATCH] cpu: Make atomic callbacks run on UP with disabled interrupts Sebastian Andrzej Siewior
2025-11-03 12:42 ` Peter Zijlstra
2025-11-03 13:10 ` Sebastian Andrzej Siewior [this message]
2025-11-03 14:10 ` Peter Zijlstra
2025-11-03 13:28 ` [PATCH v2] " Sebastian Andrzej Siewior
2025-11-03 14:10 ` Peter Zijlstra
2025-11-03 14:31 ` Sebastian Andrzej Siewior
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