From nobody Tue Oct 7 08:35:48 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 C7B091367 for ; Sun, 13 Jul 2025 09:52:21 +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=1752400343; cv=none; b=g8UpiYNwSO6RuM3U+yFp2LUQXXqxY83jnLH2XukOKD5Jl31FMV7ZxdgYRydI90qiB4MPe8H6kGjOvDDjX+3VAjnEEOZ7oR0ZcEepFxdmUI9yWSFhnHWIVTtGwVCBaINOSEBkgrRKFzUeuoOHmE06pWyMTQbfD3ps/ttB81aEHAA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752400343; c=relaxed/simple; bh=kGwqGdBW3jjbIWNaJKunX6K1VPeiWAsjwBkGA4VS9Ms=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=rt6cQhpgo2N+0n+CuUwjtnLsZaX8HWro+IA5szR1JZuWtaSwMZaRwtyEsR5lS7ytrOiLnfUVsVO5RIjFGPK+O2CeY+PigLlpeLjvD8cAgzCEAaQAveK8CYyvsEENfKFCvKpGP6qKyBnKmjLBFoyb1bn3hc7PFQHEvNcu5ZNdKfk= 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=L1o3wpR4; 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="L1o3wpR4" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1752400334; bh=kGwqGdBW3jjbIWNaJKunX6K1VPeiWAsjwBkGA4VS9Ms=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=L1o3wpR4/uaD1XuysbyqMYfRy0saVeMlYnF/9muRM7/jagiPBaGwi0z7iO6HsCqaT THgG0PFEu2ZTnh4G2f/mSRHgNAEYrRDIeSC8FQkRHiH9Ir0IP4gy0BjV6lOTd9ixPd XqZTW6lUX9WWPdYYwZgih9rxHskA5lWG7RfCs73E= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Sun, 13 Jul 2025 11:52:14 +0200 Subject: [PATCH RESEND v2 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: <20250713-sysfs-const-attr-prep-v2-2-2f42510318a5@weissschuh.net> References: <20250713-sysfs-const-attr-prep-v2-0-2f42510318a5@weissschuh.net> In-Reply-To: <20250713-sysfs-const-attr-prep-v2-0-2f42510318a5@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=1752400333; l=1101; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=kGwqGdBW3jjbIWNaJKunX6K1VPeiWAsjwBkGA4VS9Ms=; b=4hPYEUEalkAwXTCOYkjuc2iWeoth6zBCsA6YbaujMbJGBu5rYbVWZtApHgfPni7VwlhE/F25p BzEuKCREBUMAH+sQeXoqfEzq24kj/n35UOWMp5QKkaNkR2Hyp4+2LM1 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