From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [78.32.30.218]) (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 907CF3126BC; Wed, 26 Nov 2025 19:05:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=78.32.30.218 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764183924; cv=none; b=K6IUpXfCbNqMvzzoRIw2Mhcp3qBRlVNm98R34d8HzyTcIMHa55Oi7GwuwtQDA6spcyXPSPLb2LW5Yby5NwZCm8XntR9LvvnAOBqPWw7iEgHENADp/WCAxJS/54l3AKAi73pGqzvZ0mNbO4uCvaN070FF5mj0UFXs7SGQizWnZsg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764183924; c=relaxed/simple; bh=L6xn+VASU+9L8dbX2pIq17WKcsaaLaXKFhKGBFDaKhE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Tmdyk/kqZqfqrVvFWeeWQw2WSJYckqzZji/PhurZeTU35RcSSogJHosTi+8BUmtVcWhtNbFLHXJZwRAgUWsFJxfkURKtYwxOHgXmvN9CRjKFK5rQp85BJFqrXvfgcOoIgsv7XQVfaSHKhiCpPFjPrQfhplwTLj/VndeAP8SUUYA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk; spf=none smtp.mailfrom=armlinux.org.uk; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b=UmvLjZfb; arc=none smtp.client-ip=78.32.30.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="UmvLjZfb" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Y9ZKtsDO/Q8FwygSdDLskDJAHJNeZ7wl50axvyfs4JI=; b=UmvLjZfbuwcJ75/6fQd2XfzGKj W2Qw+i6LUELILqmzUEsGna/JXsOY0Zr47ZEyRPopEkhGADSRoV1ySRu8YSbjkmYNUkTDZrJdoGIro n96oCbDuxDv8MMkBLkXHCMQT2YZk4OAPhYBmUfzjxaFx0YA9ntd/SRy7aaFgmR4/xICi8BsqXoB3O IeGl3S0XSTh6dmKGo0yMZtEIxjTbcxV+lkMZ3eSjoeEWWCJiN5i/o3yD028EkAmLdzFDXDR9QW+EA 1CRX17ba79gV84fkmMT8j0Gpo7c0ygTma4hhPHlBV99CXV4/FvB+LSqLqPgrKFLTjpOqFb3KBqB7s n3QI8n1Q==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:58250) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1vOKpB-000000004QG-3kdq; Wed, 26 Nov 2025 19:05:09 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.98.2) (envelope-from ) id 1vOKp7-000000001wA-2sGZ; Wed, 26 Nov 2025 19:05:05 +0000 Date: Wed, 26 Nov 2025 19:05:05 +0000 From: "Russell King (Oracle)" To: Al Viro Cc: Xie Yuanbin , brauner@kernel.org, jack@suse.cz, will@kernel.org, nico@fluxnic.net, akpm@linux-foundation.org, hch@lst.de, jack@suse.com, wozizhi@huaweicloud.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, lilinjie8@huawei.com, liaohua4@huawei.com, wangkefeng.wang@huawei.com, pangliyuan1@huawei.com Subject: Re: [RFC PATCH] vfs: Fix might sleep in load_unaligned_zeropad() with rcu read lock held Message-ID: References: <20251126090505.3057219-1-wozizhi@huaweicloud.com> <20251126101952.174467-1-xieyuanbin1@huawei.com> <20251126181031.GA3538@ZenIV> <20251126184820.GB3538@ZenIV> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251126184820.GB3538@ZenIV> Sender: Russell King (Oracle) On Wed, Nov 26, 2025 at 06:48:20PM +0000, Al Viro wrote: > It's been years since I looked at 32bit arm exception handling, so I'd need > quite a bit of (re)RTF{S,M} before I'm comfortable with poking in > arch/arm/mm/fault.c; better let ARM folks deal with that. But arch/* is > where it should be dealt with; as for papering over that in fs/*: Don't expect that to happen. I've not looked at it for over a decade, I do very little 32-bit ARM stuff anymore. Others have modified the fault handling, the VM has changed, I basically no longer have the knowledge. Effectively, 32-bit ARM is unmaintained now, although it still has many users. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!