From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EA1C6264A84; Fri, 9 May 2025 06:12:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746771126; cv=none; b=iZ7HgJD1ujNm676cB+wZQfD5t2M2fIYKxqP0tIV0csqPhr+rX1ZR8AKArvpCKmwpQpDi0NOTm8JFt0Bm5b2WUDi4UdYSuS5i9hFl+bWl1GsOWevzynw6ji1IwM6EhLTw1aXUIR+RN1tmcANsUVz60+M4CxdpqYHLN+N8pW3P9Cc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746771126; c=relaxed/simple; bh=EBOGrAw4Os2phUDIo9oV+zsZr3pz5AX/0UCC8ECPHYw=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=YcBXTimb5bfVLv1k8M0+EmUVWAIOrTD9aOvpYcRCAVF1g1Em2g9YnNJQcJDchXkjozdp39zsA1y5dEW09y/Z1X6KAiPM98Zw2SAznrsJ2z7Yw6ClGN+/bVv6LCMshuxx+kTAnzYI8XSds1/7eAbxFX+7yZJ0370A+EH4gpu0kvw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=zjso23WF; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=m2elasvB; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="zjso23WF"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="m2elasvB" From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1746771122; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=gQhL/zyL49irqKyovfJLz1V1udPg6T5kLoJ7hlE7PeI=; b=zjso23WFgU+4rv7GJc1BegpJV1XWNNfeHwWdBJA2bcQLX/CMDLGUxO1ikiWwzQ93b95YVH xuXG/hiDYQ241qAsp8SjLBGB+zIUOnXSusBXoD4I62ut2avhIrjOb1wOuxwemNNPo3wu+f r6jv7G5Lglk8tEfJJKrbpELXKs4PHGvPANsP4tXadf3fT+XIfzzkIqNwBAEbJYSxjm1hy/ N2UGYQlQRxnIG5wCqF8HI792lbWAsEvRg8o+QAQQc47L+6x6yMaue0W2QvOeJQu0qPkMLb 8oZtht5XVVC+86p1nmYCFhCAb0qdLxJTC2ZXgxhrZ8WroDFtrls1cU1Wy8rqgA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1746771122; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=gQhL/zyL49irqKyovfJLz1V1udPg6T5kLoJ7hlE7PeI=; b=m2elasvBKh2AfN0UtHut/CqU7Sz7jTdXh7jTgiapvsVYZztb4k6aFVFctg7HMdeZe1poux s+AZ9+ozns00CECw== To: paulmck@kernel.org Cc: Peter Zijlstra , linux-kernel@vger.kernel.org, Stephen Rothwell , linux-next@vger.kernel.org, kernel-team@meta.com Subject: Re: [BUG] Lockdep warning from "genirq/cpuhotplug: Convert to lock guards" In-Reply-To: References: Date: Fri, 09 May 2025 08:12:01 +0200 Message-ID: <87plgil3da.ffs@tglx> Precedence: bulk X-Mailing-List: linux-next@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Thu, May 08 2025 at 15:29, Paul E. McKenney wrote: > Testing next-20250508 with lockdep enabled got a splat that is shown in > all its glory below. Reverting this commit makes the problem go away: > > 88a4df117ad6 ("genirq/cpuhotplug: Convert to lock guards") https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=irq/core