From nobody Fri Dec 19 17:18:45 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 A6CEE30AD03 for ; Mon, 13 Oct 2025 15:17:59 +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=1760368681; cv=none; b=TQErcx3AYYUCr+jqEuXZgBB4yqWpQKXB2RB/m0EtsRFgVTiyJTAzB8r52XXLBtJexDhQ1hYtu496NMR+daeAVr7izNF1PWZ8cBMJVumj3DQVQ7u1WiaMVIvOFBzfqsv0WAAsyYpyZANx1+/QtQq5+BXIDHNCj4vB/IHnCSA/hCg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760368681; c=relaxed/simple; bh=HC4YPP7F9f5/8XpQpN3pCxcZl4ZWvihPACOD9G2RUOs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=OFVmP/LtDhMqXAny1MZ8k99yfa+ZZXRI59lgN+jjoRPZ3jDZdTTMmr/73hbNz0C1PNLjyOQSZwhVkTdDgo7jvJX9iQkPZWys8qhEeL+KBGk4f3KGoj3f5dGVA/YrsULxJEnPx75pEWjed8QPEN3zmPYRaQ2tb1o49BeVJlPJ7nc= 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=XgzZweWk; 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="XgzZweWk" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1760368677; bh=HC4YPP7F9f5/8XpQpN3pCxcZl4ZWvihPACOD9G2RUOs=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=XgzZweWkP7HgPeOFK9l4odAyT04nglkkumkMx27cnoVs2pkVXggCIwfpDV0xBk80S GsArnGU2HgnAzLBMeUiO1XQB5ZFlxDOQjnaBohoJHmn7OjNWA52L2eRVfxjB5U5yyz oWVYBOm7gDHzWCyZ2VRkr5uqBT0YKgfit+xG6n0I= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Mon, 13 Oct 2025 17:17:55 +0200 Subject: [PATCH v4 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: <20251013-sysfs-const-attr-prep-v4-2-e0d36e828334@weissschuh.net> References: <20251013-sysfs-const-attr-prep-v4-0-e0d36e828334@weissschuh.net> In-Reply-To: <20251013-sysfs-const-attr-prep-v4-0-e0d36e828334@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 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1760368676; l=1044; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=HC4YPP7F9f5/8XpQpN3pCxcZl4ZWvihPACOD9G2RUOs=; b=8Dm8CIpShyi3yU/5hFkgvK0gYk3znKEYFfCh/zw22A3BzEpvZXPacg/YduEZSssDfOh9tZOuc HK+Ttsp/xEEBuL039wdPDwolgm0cFqO8+ZREtu6ArtM0CZYpAMaUZ7D 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 e34d6af96abb..92f82cee5f11 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -287,7 +287,12 @@ 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 2.51.0