From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7C7B8C624A4 for ; Thu, 3 Sep 2026 12:34:45 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 70D446B00A6; Thu, 3 Sep 2026 08:34:44 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6BDF66B00A7; Thu, 3 Sep 2026 08:34:44 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5D3876B00A9; Thu, 3 Sep 2026 08:34:44 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 3A87E6B00A6 for ; Thu, 3 Sep 2026 08:34:44 -0400 (EDT) Received: from smtpin08.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 9D521C0521 for ; Thu, 3 Sep 2026 12:34:43 +0000 (UTC) X-FDA: 85172394846.08.9A527CF Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf13.hostedemail.com (Postfix) with ESMTP id E427B2000C for ; Thu, 3 Sep 2026 12:34:41 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b="G0/zDgEF"; spf=pass (imf13.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1788438882; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=uK0Hbb1faKPkbn+cU/4RsAvsMY58CotR+cwVfIyfMWY=; b=U1SY0sRXPpbg/XrM7mu3yQRisZZPCD3mmK+soH7sPFUL3A1CHXrNQJreP9V3MbSdZJ+SSH e0UbRxgNYUk8b1QKtMqBG/J0MBdnIXwZk8sIfsJ/XjMC/I6YNllqCBXpv+RilPmM6S1PWf bmZOMAv1q+uNqvpe2usaP1/OscHmEc4= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1788438882; b=qcauf3EhMFOtBRG+2/fhEtOysinZFgVqLtN2lxr8I/jHMPzPiQaduWf4UO5ojjOS5dX0v5 wbcBFCN/KFLx/H1Mfku2JqHKi6osPYYL0USpNDwGm2m0Xi3V7rlvqFSyN5zUJQItVvzez3 k1rGtsCj2+5jVFXK3iwrFi39ZrJy4Rs= ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b="G0/zDgEF"; spf=pass (imf13.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id BA624417CD; Thu, 3 Sep 2026 12:34:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id ED6C31F000E9; Thu, 3 Sep 2026 12:34:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788438880; bh=uK0Hbb1faKPkbn+cU/4RsAvsMY58CotR+cwVfIyfMWY=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=G0/zDgEFJRV3Fd3FiL6VOiv71LC5tt6dpsEVZ+vUTmxM+NIkfCgQmQCBmUR3efDGs d03+lO5Yzimj4JcFaVVzO2IW2X1IZvoSXrXgIixcVXqV+kWrONGDmqqBS7QC0sjhln 8O4USSEsQKziD64eJ0j+N0yOZs67H6km3FbL+OuFzFso7aU11hik0VgMO6mPSJiarf 096aqgZsssYcV4yinnALs/mSWYagEgscsV1LbY9kDPbwwxtRqGD+2PZJ53dAh4qbJv 2gRW6Hk+qGBW8JNr09rbNX0I9Jkemeaq98CSNtqYud1iuXkknhUDVS9iSXRPLZW8PR OBW163lQPJ7Lw== Date: Thu, 3 Sep 2026 15:34:31 +0300 From: Mike Rapoport To: "Lorenzo Stoakes (ARM)" Cc: Arnd Bergmann , Greg Kroah-Hartman , Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Jann Horn , Pedro Falcato , David Hildenbrand , Suren Baghdasaryan , Michal Hocko , Hugh Dickins , Baolin Wang , "Matthew Wilcox (Oracle)" , Jan Kara , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH 1/6] mm: move drivers/char/mem.c to mm/char-mem.c Message-ID: References: <20260902-map-private-dev-zero-v1-0-a578c730cec7@kernel.org> <20260902-map-private-dev-zero-v1-1-a578c730cec7@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260902-map-private-dev-zero-v1-1-a578c730cec7@kernel.org> X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: E427B2000C X-Stat-Signature: 6d1us4c4xd57agcctgxff691zopw1f1m X-HE-Tag: 1788438881-477081 X-HE-Meta: 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 xzXcU0uf wDyWfblPSKKyD5tIjjJpChWhHNh8xD87mp+OQ9bNxL0cCekfTKnUXumxogMY4FQYJ+pNAoc8VSSc5cTt5QjjpIgyMEWB/NcjWUtbDLZA/Ml+OviF9yb9TnoqLECBDnGKoADZQyTTHifcLeaHuM4gpe0ydIaGUELw8BCqCSuWv0PZyzZ3vfeNhtX+4PwgmWPH1vpm0dUa6pnmq4jDAEaGYkdpr6A76Q4igom4wcW8DMMbuZPiKf7IGO6Z3PiwNrUqreVr6EjI+REeMkRf2LlXvOAXo7w== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Sep 02, 2026 at 07:00:18PM +0100, Lorenzo Stoakes (ARM) wrote: > The memory character driver implements several mm-specific features and is > always compiled into the kernel, so move it to mm/ where it belongs. > > Among other things the driver implements /dev/mem which provides raw access > to physical memory, and /dev/zero which either allows mapping of a shmem > region (if mapped with MAP_SHARED) or, uniquely, anonymous memory (if > mapped MAP_PRIVATE). > > This change lays the foundations to allow MAP_PRIVATE-/dev/zero to be > mapped precisely the same as anonymous memory is mapped as currently it is > an edge case within mm. > > Also update a couple of comments that reference 'drivers/char/mem.c' to > reference 'mm/char-mem.c'. > > Signed-off-by: Lorenzo Stoakes (ARM) Acked-by: Mike Rapoport (Microsoft) > --- > MAINTAINERS | 4 ++-- > drivers/char/Makefile | 2 +- > mm/Makefile | 3 ++- > drivers/char/mem.c => mm/char-mem.c | 2 +- > mm/shmem.c | 2 +- > 5 files changed, 7 insertions(+), 6 deletions(-) -- Sincerely yours, Mike.