From nobody Sun Oct 5 03:40:30 2025 Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) (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 BFCD12DCF5A for ; Mon, 11 Aug 2025 09:14:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.69.126.157 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754903674; cv=none; b=A5tzq96s0TFbi24wesIDjSRsVJ710IFuNDoAfbpyd1HJ6wavQZ15wKbaXWLiirGe4snh717K3oDCv8AG9rWtvfpyrdLTbpIGGteHBuF3HUyBGH+LIOC7H+H5ftkbbBdh1KjxQ0jF7aVtmou39320aJTJVarQA61+k3CWUZgFFXw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754903674; c=relaxed/simple; bh=kGwqGdBW3jjbIWNaJKunX6K1VPeiWAsjwBkGA4VS9Ms=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ObJVv2DPHj8nF81XDrqaHNdg2v9mCOYSgRvFw2aODRJrAxt0KXBlZh6qV+2YhWTc8wtL/ucs5CQp46LgYpB6Ds65n4h/okVgExNZBTCUnYF2g/vQ3qennCCHh5Mkw++y0TJsQqmrbqUZ5TijTeTLLnyCCVAdcqsxxCrmG0pg+N8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net; spf=pass smtp.mailfrom=weissschuh.net; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b=BWllO9h/; arc=none smtp.client-ip=159.69.126.157 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b="BWllO9h/" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1754903670; bh=kGwqGdBW3jjbIWNaJKunX6K1VPeiWAsjwBkGA4VS9Ms=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=BWllO9h/1iVmKCAyPpFe/dzFSgCMIiyQU1KDs1LVI/Z8RbXbu6oQa5XwLDy7P5T93 6wh0WwmCgEsgGhUNgXM/drhKqIzWI1IZ3MDJfleFWNztWwljodhooLVMXgKt3HLEwM HfIOSEy5MSE+xu40HVmUvgWqsThqv+AYkYlKzoD4= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Mon, 11 Aug 2025 11:14:28 +0200 Subject: [PATCH v3 2/7] sysfs: transparently handle const pointers in ATTRIBUTE_GROUPS() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250811-sysfs-const-attr-prep-v3-2-0d973ff46afc@weissschuh.net> References: <20250811-sysfs-const-attr-prep-v3-0-0d973ff46afc@weissschuh.net> In-Reply-To: <20250811-sysfs-const-attr-prep-v3-0-0d973ff46afc@weissschuh.net> To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: linux-kernel@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1754903670; l=1101; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=kGwqGdBW3jjbIWNaJKunX6K1VPeiWAsjwBkGA4VS9Ms=; b=YoFO/BTW8Ds2teuPPG2QBfkTDZV0GcQmt5U44DxRDTqvcHbngmh3NID0wSDVDD9Jvl8xHaWjU gJ8PbVwKKNYDy4OXXUqckImzeS2yFOg2Ub+7KuX3ED7gWSDHgCBYIHI X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= To ease the constification process of 'struct attribute', transparently handle the const pointers in ATTRIBUTE_GROUPS(). A cast is used instead of assigning to .attrs_new as it keeps the macro smaller. As both members are aliased to each other the result is identical. Signed-off-by: Thomas Wei=C3=9Fschuh --- include/linux/sysfs.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index a47092e837d9eb014894d1f7e49f0fd0f9a2e350..118a9b1d3b3e7528fb213d83f85= d31bbac0dc309 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -290,7 +290,12 @@ static const struct attribute_group *_name##_groups[] = =3D { \ =20 #define ATTRIBUTE_GROUPS(_name) \ static const struct attribute_group _name##_group =3D { \ - .attrs =3D _name##_attrs, \ + .attrs =3D _Generic(_name##_attrs, \ + struct attribute **: \ + _name##_attrs, \ + const struct attribute *const *: \ + (void *)_name##_attrs \ + ), \ }; \ __ATTRIBUTE_GROUPS(_name) =20 --=20 2.50.1