From nobody Tue Apr 7 16:21:15 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 526003783BD; Thu, 12 Mar 2026 20:28:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773347290; cv=none; b=ss03lUEqaCx7bUpnmjNjvDhs9phKNCwjQzwbpLoOZicyUR4YLPBHCETDm8Z7DP1ZS+iCp5k1YrnIsv+XJ180c0wQWQI6dtQ7LMEGgpmOBJiHvXVrPk7kxixEqPib/JZCb/Rqff/nqqnJu6kE71FOIAstdQUmubnajBDM7pFMcSA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773347290; c=relaxed/simple; bh=JCZVqkUElmN6+yCXi96nBc4FJ3bPC1rGzZ/PK/wD/Eg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hrmuuQWZg6AQbVZptt2K4KbMaXsCynXUoJEnt20ZZvBOJ7hox0FbUAoCDYxMWwMXIpq1bgoI/hRFsuDj8BVVKRsAjlMkcwUWqg2RuoG+PHOAWyKMOKSnHRgCnIE0m3r47i/fjAP3Exzh9N1F0FapRl6v4YwTD+/cKuZ/DDClveE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bfGi+MTK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="bfGi+MTK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9FA22C2BC9E; Thu, 12 Mar 2026 20:28:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773347290; bh=JCZVqkUElmN6+yCXi96nBc4FJ3bPC1rGzZ/PK/wD/Eg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bfGi+MTK8J6+mDwEcB2grAiIoBHNi6ToIdSweYX1KKTkIHiX3GURmWNfrAPxerS1D Nh/VkCCCUnOOCtEf13Nb7zc/Q98rW4rch/4GeajMhVO7hPVVQc5xcVK1s25YhJRpW2 xYKrvKjtMajgyUtSI4IiXea1EajvOkTjbzEsPPlR9UDH2PcVnhQczcinWoycNGju0S S0yWAgLQ/wAaVAfZXdxfrzJhHe3RVXPuTcwQxxSgJBDJHwR9hb1+Ld+hj3z/82CDeW BLrnwr4XSxCp3KnFGnZtYZxl6LgeP0MJ0NsIPfiShyv/SmPPC3dT3X7Hu3a5Y/5mg+ AGWawBzWNWhwQ== From: "Lorenzo Stoakes (Oracle)" To: Andrew Morton Cc: Jonathan Corbet , Clemens Ladisch , Arnd Bergmann , Greg Kroah-Hartman , "K . Y . Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , Alexander Shishkin , Maxime Coquelin , Alexandre Torgue , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Bodo Stroesser , "Martin K . Petersen" , David Howells , Marc Dionne , Alexander Viro , Christian Brauner , Jan Kara , David Hildenbrand , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-mtd@lists.infradead.org, linux-staging@lists.linux.dev, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-afs@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Ryan Roberts Subject: [PATCH 09/15] mtdchar: replace deprecated mmap hook with mmap_prepare, clean up Date: Thu, 12 Mar 2026 20:27:24 +0000 Message-ID: <75cdd8bf8833104cb35268a0fe9bd6b969eb8c17.1773346620.git.ljs@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Replace the deprecated mmap callback with mmap_prepare. Commit f5cf8f07423b ("mtd: Disable mtdchar mmap on MMU systems") commented out the CONFIG_MMU part of this function back in 2012, so after ~14 years it's probably reasonable to remove this altogether rather than updating dead code. Signed-off-by: Lorenzo Stoakes (Oracle) --- drivers/mtd/mtdchar.c | 21 +++------------------ 1 file changed, 3 insertions(+), 18 deletions(-) diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index 55a43682c567..816ab1ae8b8d 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -1376,27 +1376,12 @@ static unsigned mtdchar_mmap_capabilities(struct fi= le *file) /* * set up a mapping for shared memory segments */ -static int mtdchar_mmap(struct file *file, struct vm_area_struct *vma) +static int mtdchar_mmap_prepare(struct vm_area_desc *desc) { #ifdef CONFIG_MMU - struct mtd_file_info *mfi =3D file->private_data; - struct mtd_info *mtd =3D mfi->mtd; - struct map_info *map =3D mtd->priv; - - /* This is broken because it assumes the MTD device is map-based - and that mtd->priv is a valid struct map_info. It should be - replaced with something that uses the mtd_get_unmapped_area() - operation properly. */ - if (0 /*mtd->type =3D=3D MTD_RAM || mtd->type =3D=3D MTD_ROM*/) { -#ifdef pgprot_noncached - if (file->f_flags & O_DSYNC || map->phys >=3D __pa(high_memory)) - vma->vm_page_prot =3D pgprot_noncached(vma->vm_page_prot); -#endif - return vm_iomap_memory(vma, map->phys, map->size); - } return -ENODEV; #else - return vma->vm_flags & VM_SHARED ? 0 : -EACCES; + return vma_desc_test_flags(desc, VMA_SHARED_BIT) ? 0 : -EACCES; #endif } =20 @@ -1411,7 +1396,7 @@ static const struct file_operations mtd_fops =3D { #endif .open =3D mtdchar_open, .release =3D mtdchar_close, - .mmap =3D mtdchar_mmap, + .mmap_prepare =3D mtdchar_mmap_prepare, #ifndef CONFIG_MMU .get_unmapped_area =3D mtdchar_get_unmapped_area, .mmap_capabilities =3D mtdchar_mmap_capabilities, --=20 2.53.0