From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-out.m-online.net (mail-out.m-online.net [212.18.0.9]) (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 BDAC326B779 for ; Wed, 10 Sep 2025 07:00:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.18.0.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757487642; cv=none; b=mn1Rl9ey71i3Jp6PIG3KR2oMyxxohYdO3noiLfnpw4V7mz7XVHf+3s6VN9zQNY5VYAMwlL8mu3kez0494m4Mh/QNp8s1vl9lUEbqKQDikQQ1/ESnWgrzQiYPKTUCDMxQVt+TPU8PdzC4tmFzKNbcERZMM1d2bXA23e/OEgh5+4k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757487642; c=relaxed/simple; bh=O5vcD4Ldjc71ve0d02RfmDHc6hlfFFueKhpbZB+vRrM=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=WToCNDB6gbWmayAglbszjUULBzYCEYzh3lsqldJERpuBkGwyE/PyBUy5VGh83UEebqMiUoNxNXYqAd8VxdOi2z057TEQxK8VSmSe1U7FVJue/mwsKTFjfA9AL3Fy9fTcpAiqQaYRi2wdC7C+052zBjI+1eE77ciKMGLcrc5SSlU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=linux-m68k.org; spf=pass smtp.mailfrom=nefkom.net; arc=none smtp.client-ip=212.18.0.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=linux-m68k.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=nefkom.net Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 4cMBFy3BPqz1r5hQ; Wed, 10 Sep 2025 08:52:38 +0200 (CEST) Received: from localhost (dynscan1.mnet-online.de [192.168.6.68]) by mail.m-online.net (Postfix) with ESMTP id 4cMBFy0d40z1qqlS; Wed, 10 Sep 2025 08:52:38 +0200 (CEST) X-Virus-Scanned: amavis at mnet-online.de Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.68]) (amavis, port 10024) with ESMTP id r6oSkNIfIRpU; Wed, 10 Sep 2025 08:52:28 +0200 (CEST) X-Auth-Info: GsbNNI76Sv79L7YvGPmcrwtzn4oM1W/t9R3+pP9F4xssEftMcVyEECTVPJd+4YJQ Received: from igel.home (aftr-82-135-83-103.dynamic.mnet-online.de [82.135.83.103]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Wed, 10 Sep 2025 08:52:28 +0200 (CEST) Received: by igel.home (Postfix, from userid 1000) id 1C52A2C1920; Wed, 10 Sep 2025 08:52:28 +0200 (CEST) From: Andreas Schwab To: Finn Thain Cc: Kent Overstreet , Lance Yang , akpm@linux-foundation.org, amaindex@outlook.com, anna.schumaker@oracle.com, boqun.feng@gmail.com, geert@linux-m68k.org, ioworker0@gmail.com, joel.granados@kernel.org, jstultz@google.com, leonylgao@tencent.com, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, longman@redhat.com, mhiramat@kernel.org, mingo@redhat.com, mingzhe.yang@ly.com, oak@helsinkinet.fi, peterz@infradead.org, rostedt@goodmis.org, senozhatsky@chromium.org, tfiga@chromium.org, will@kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v2 1/1] hung_task: fix warnings caused by unaligned lock pointers In-Reply-To: <99410857-0e72-23e4-c60f-dea96427b85a@linux-m68k.org> (Finn Thain's message of "Wed, 10 Sep 2025 10:07:04 +1000 (AEST)") References: <20250909145243.17119-1-lance.yang@linux.dev> <99410857-0e72-23e4-c60f-dea96427b85a@linux-m68k.org> Date: Wed, 10 Sep 2025 08:52:28 +0200 Message-ID: <875xdqsssz.fsf@igel.home> User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: linux-m68k@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Sep 10 2025, Finn Thain wrote: > Linux is probably the only non-trivial program that could be feasibly > rebuilt with -malign-int without ill effect (i.e. without breaking > userland) No, you can't. It would change the layout of basic user-level structures, breaking the syscall ABI. -- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."