From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 EFD1A24A067; Tue, 31 Mar 2026 00:29:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774916953; cv=none; b=ECe6gjdeWhxHiwnDCERk8mYiR2rId7j7k8SKFW3EX76fZJgr5XgbRvIcnRiMMvlIFvx8vczIP1ah3RKqK07dBCLcXzkPU85PYHfhbtWiy/666BWesKZ9Is3jkgCFhCuNeE6eF8hZbq4n2nZBcfEIsNj5X0ru0aVqh3koE/qnppk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774916953; c=relaxed/simple; bh=ThIoBL+FtK2I1zr3RdCUEjl7aiEAYlPso6MdM7tUkyE=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=f8e9DDq01XQiqE/HiCh0J8NnhTKLZbiCB73q6S4blUtQwhGm9gdmyNEMPxvcBDGknTUDc4cx620YJfPFnb0OWLS7sa4M5mZwBf3/qoeKIpW2VWZJjKBWqIXe04pe8PQcwL1oicV1RslE6wKgEPE826AgJFhFef1a9D1C1F59KTc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=b+iTcwuD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="b+iTcwuD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C1450C4CEF7; Tue, 31 Mar 2026 00:29:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774916952; bh=ThIoBL+FtK2I1zr3RdCUEjl7aiEAYlPso6MdM7tUkyE=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=b+iTcwuDV/Tt4kTXRRyOCxHIkvI4zEl+S30cX7KYDlrJrZ7DH+j2MlPlddvwJkFsG UCVIhcaCz3p9ns2mJmA1Ft+6fjWDFjtRjQfuMIs6dRJ6rqQJncby8eATNZ+sfwhPTZ MvthKeBm60wEknuokPE03OFJWj4Elne/diVLeQqomCg4ishXBO/laOhhONVwNeEZyy GhdFnd8uNb7tBnshl3GWRW9dAgK4M1dPq6kj2ILg2kZ9mYkECqes10UsmMrLZX9b3H C1IJ6iZ5Cur8fXSOQATrg+Kcrqj9gMjb3pzAlmdp69T2nmupemizxxJlhfydCxRxln Gnqj9mMVr2Y9w== Date: Tue, 31 Mar 2026 09:29:10 +0900 From: Masami Hiramatsu (Google) To: Steven Rostedt Cc: Mathieu Desnoyers , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Ian Rogers Subject: Re: [PATCH v14 1/5] ring-buffer: Flush and stop persistent ring buffer on panic Message-Id: <20260331092910.0ddb1d190e41cea00f6cb1ee@kernel.org> In-Reply-To: <20260330135447.423bc070@gandalf.local.home> References: <177487498530.3463592.12715592581212799257.stgit@mhiramat.tok.corp.google.com> <177487499643.3463592.15413057950716995168.stgit@mhiramat.tok.corp.google.com> <20260330135447.423bc070@gandalf.local.home> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Mon, 30 Mar 2026 13:54:47 -0400 Steven Rostedt wrote: > On Mon, 30 Mar 2026 21:49:56 +0900 > "Masami Hiramatsu (Google)" wrote: > > > diff --git a/arch/arm64/include/asm/ring_buffer.h b/arch/arm64/include/asm/ring_buffer.h > > new file mode 100644 > > index 000000000000..62316c406888 > > --- /dev/null > > +++ b/arch/arm64/include/asm/ring_buffer.h > > @@ -0,0 +1,10 @@ > > +/* SPDX-License-Identifier: GPL-2.0-only */ > > +#ifndef _ASM_ARM64_RING_BUFFER_H > > +#define _ASM_ARM64_RING_BUFFER_H > > + > > +#include > > + > > +/* Flush D-cache on persistent ring buffer */ > > +#define arch_ring_buffer_flush_range(start, end) dcache_clean_pop(start, end) > > + > > +#endif /* _ASM_ARM64_RING_BUFFER_H */ > > You probably need to get an ack from the arm64 folks. OK, I will add them in loop. Thank you, -- Masami Hiramatsu (Google)