From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 B431434DB6D; Mon, 13 Jul 2026 18:03:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783965832; cv=none; b=dQjeaO/VMu5+Hz2MtXkTR0zYIOuQT3ZJnUvVWcxQZnsmxt43evRgydeXA223qC2vGN0eQV1QKed0QlU/e8f6d4W9yO9Jp9mJ9n1lknrPft7FSoAFwg6wCen2o8yeRFV5JT1sVG1zXMKv/eoszTb9YuBSEBJq0GCW+WJ1jEYWtmE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783965832; c=relaxed/simple; bh=XdjFqq97CsKnnRSJEwXzRQMYq4/jhzVvgO9flQ46L0I=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References: MIME-Version:Content-Type; b=fEuXoxTxKNX14fT+FhZ9odjXRBSK4Byo7MKuPOamT7c4VElRMk/QaXABQlvCLrVPjJf3TFbL2VpNZnXlJsh8auolPV5xVyHky7b23zSix/01KOxn+uCwTORQY93gGUF9tNXb+lxZk0Op83Fvqvu4ekR4i6o6eCKvl+6wnMLnzXQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ESOKP2rZ; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ESOKP2rZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C5A7E1F000E9; Mon, 13 Jul 2026 18:03:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783965831; bh=0R1cR7bKh7ixS3Ep3XrpKwenEOmJrkdIxyoKz6OerB0=; h=Date:From:To:cc:Subject:In-Reply-To:References; b=ESOKP2rZPyACXFW/kfBTOgmI3+3qmraqLbjJMYdrj3rjM8G8wl+2yrsV7SboHyQbQ cBQkXKgK008NzCXQZBYUI1VDd6+5Mm6vuxOTstiYXXI/Q3pDB2tCojuKfgnSuCvzjM mN9qDvnOrt37OWH8edLykRMnH6QeT13rxLkBs8tWhSHW0bDEv2Ir070kOlNO1UcyVh f6rkxiqi58tXvghJ0k6P9qzrj/Dwdz3FJfy2KGLkNvzJXlFaRJ3mvnyhXloQv8wM33 XLg8vWZPxDV6NMnxwRU0qLkg+LHyAJ8SoA/7d8IkuYuaefHVETGtQdaIk/CCXPTt4L 6ZeGlodc0aoBg== Date: Mon, 13 Jul 2026 12:03:47 -0600 (MDT) From: Paul Walmsley To: Yunhui Cui cc: pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, dennis@kernel.org, tj@kernel.org, cl@gentwo.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, memxor@gmail.com, song@kernel.org, yonghong.song@linux.dev, jolsa@kernel.org, bjorn@kernel.org, pulehui@huawei.com, puranjay@kernel.org, thuth@redhat.com, ajones@ventanamicro.com, ben.dooks@codethink.co.uk, rkrcmar@ventanamicro.com, samuel.holland@sifive.com, zong.li@sifive.com, conor.dooley@microchip.com, tglx@kernel.org, debug@rivosinc.com, seanwascoding@gmail.com, andybnac@gmail.com, menglong8.dong@gmail.com, cyrilbur@tenstorrent.com, wangruikang@iscas.ac.cn, atishp@rivosinc.com, apatel@ventanamicro.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, bpf@vger.kernel.org, arnd@arndb.de, nathan@kernel.org, nick.desaulniers+lkml@gmail.com, morbo@google.com, justinstitt@google.com, qingfang.deng@siflower.com.cn, linux-arch@vger.kernel.org, llvm@lists.linux.dev Subject: Re: [PATCH v8 1/3] riscv: io: avoid null-pointer arithmetic in PIO helpers In-Reply-To: <20260703122832.15984-2-cuiyunhui@bytedance.com> Message-ID: <74ffb0c5-4edd-7b64-3d3f-be76c2aec4c2@kernel.org> References: <20260703122832.15984-1-cuiyunhui@bytedance.com> <20260703122832.15984-2-cuiyunhui@bytedance.com> Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII On Fri, 3 Jul 2026, Yunhui Cui wrote: > When port I/O is not supported, exposing the port-string helpers is both > unnecessary and can make clang diagnose null-pointer arithmetic from the > PCI_IOBASE based address expression. Keep the MMIO string helpers > available as before, but only provide the port I/O variants when > CONFIG_HAS_IOPORT is enabled. > > Signed-off-by: Yunhui Cui > Reviewed-by: Arnd Bergmann Thanks, queued for v7.2-rc. - Paul