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 8BC1A38D415 for ; Mon, 6 Jul 2026 09:07:25 +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=1783328848; cv=none; b=lHSe6Tg5apA9C+OkPvvncJsG8qykMPda8MjWUfcdSCVMyqFK6MvwVUPlc1mqnSCN1vbPlsJfLFgm3s9NE5+VBjXSam0kbDYJwtIfSliYORihkNvoM0AKX38Pac7TI4BdY0gqXoa6z+AXmg2e60PiyXSl7l1IM/0hTT/Pr0zf4Qw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783328848; c=relaxed/simple; bh=QMnC+tXWH/qDnZD3RXqMzHr/+mcGPLbNXNpSbWgyBi4=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=SuhwB48cdWftZOn5VvXmwgOqkGJ23Zj69PcSUssMzMdIBM+p3YUof4+og1rj4RuMN2LpJ99+LSSZ6pLBtFG+zcBoqt2jZ5KZY+GDKRQeNp8YmY2NUPo3y1XXdpCTSEYfECwMosSWtBTtqA1QhahvnwYzWQeXdHM3eGVVz8wmvz0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ab51Wrex; 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="ab51Wrex" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D69031F000E9; Mon, 6 Jul 2026 09:07:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783328843; bh=vSfJQt1JiqAr2xj8Wd+P7V4byeDYrtLPRI5xJpeSUP0=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=ab51WrexuNkUaU0YN/LGfyHuikKjcjzTdYrZgkt4SeXddGjqYHhrvgDbj45Q6pM6L mdd3L3gatNt1KH1s/74Fp+cuwVU186o21mKvpPxRcTXR+x0d9MGcErh+A6a7umIO/n ccUc3lA6KZ25pVDkr56Q+SlNFhhZKToOFx/YeT5db/NZCCHPWERmXwwPUfY2RRMrMY rVh7cPUjiCoS+48edRJUxufhITHyYF57Fv92/jLlERKdOOjO4QOBPfYdsKqI2JPSo9 70Um1vEdvCGmvYAaOwKlDGkzM6081GLnkDG1FeFllfzw34Ku31Yivi1pJb66/XUX2X 1Z1/qJ72ZJl8w== Message-ID: <16516aae-d233-4756-a378-14ead66de36f@kernel.org> Date: Mon, 6 Jul 2026 11:07:19 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mm: avoid shadowing global mem_map in sparse_init_one_section() To: Mike Rapoport , Anuradha Weeraman Cc: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org References: From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 7/5/26 11:17, Mike Rapoport wrote: > On Sat, Jul 04, 2026 at 11:54:51PM +0530, Anuradha Weeraman wrote: >> With W=2, sparse_init_one_section() warns because its mem_map parameter >> shadows the global mem_map declaration in linux/mmzone.h. >> >> Rename it to section_mem_map to make that scope explicit and avoid the >> shadowing warning. > > I suspect that the comment in mmzone.h saying that mem_map is must be > declared for SPARSEMEM is stale and it can be guarded by #ifdef > CONFIG_FLATMEM which will be a more correct fix. > Unrelated to that, I thought we don't particularly care about W=2 stuff unless it uncovers a real bug? -- Cheers, David