From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794324836; b=094+BvUreguZPlQ+LLxBuEQJ6CwqiFKrboFwi6J+IE/j7VvUaRuZYXpMKrPuHr90W6Vz 59u0hvL6NrEMoKA4hpZ+q63p1q9Ve3ZLVvRGA4BmAc/irl7LeLzZJyQsHTLJtYpS0vicV 8nB9JGtJQQR0pcmVOu+Q9AMX9rE0XD3nCZGxCfOfvUpTC53kp+RJWJMJIITpxJZS/rtvk J8u/5rhBd/6gIJ+RmGSq7APaX6zqhCavejVY+RnzOikyx+gayO2yW7LCWWUBp5pdz3tJB l2raFqliLELV5L7Ks9A93CNCsLjQANhlOzbOpRbzJ6Gxu+DdqyB1BEvLmeqIwKE+TMw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794324836; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID:X-Mailer: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=3owOOx7owO0YzW+AS/1sjv03XsYwvN9g+0EiAc1SJKM=; b=HanrY5QL4tDwstvoqiPbUZ4FI8r35QDnhuzhapliZvEtMqUulGnoDCAtlJmZDJpx9jRR op34wch11Omq4UYqNImklCJi5nKZkMFR7FzJvOpkic46RHIyOuB7OHSPw8HP/tWRtQOBy Dhwg1lpDLXLBy4EGhggTvp0a4zPfelmtvKXAHBa4BKBcaowYfjrTjqtVxn3sf2OaiRTuu KpzacugTBva6p2nUcXbNcEQ0jmWKeU2rTgf0xb6xPK8g5M9vFC0bwr+vQX4iETEk6MeZf 9qhbni5TtwtjAmTY0VvwMtLZUlARWHoLPHSHehM4wHB750hDerYaS5fqzCxOMMJQqcg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Q4oM7nrx; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 45A3F606A33E; Tue, 10 Nov 2026 15:33:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Q4oM7nrx Received: by smtp.kernel.org (Postfix) with ESMTPSA id E32FF1F0089F; Tue, 10 Nov 2026 15:33:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794324835; bh=3owOOx7owO0YzW+AS/1sjv03XsYwvN9g+0EiAc1SJKM=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=Q4oM7nrxcrrlczuZqvPnLiHAqazfrBHUvuSz2o3p9VOjHGMtSzK1hC968kqIHgCYJ 1jeTc8Ynh96dbrYr9Uft7K0o/zjP39HYpfY2VvBvuZeINr2xj4XoURY7i/ZktdRnVp fQ3Btd+ZvmWr+tXFA1VKPVlLFbQ3EplnxIzXz8Fal03O8ylNDe5VOL7SQlrYLZ9OE+ Opn8BCzmK8lAUdLvGZOcKdGiV5EpBLnd+5g9kNeehVj/LyW5NYIvDF/gxqhXBjScO7 Y97rdbXf6wgvhlH05tBqaldtqNp79yuVlBKQPenDI9wDkMqyGnnv6vmyM9EOgCgd8X 2LdGQIkClXx4g== Date: Tue, 10 Nov 2026 16:33:48 +0100 From: Alejandro Colomar To: linux-hardening@vger.kernel.org Cc: Krzysztof Kozlowski , "Maciej W. Rozycki" , Geert Uytterhoeven , Alejandro Colomar , Andreas Schwab , Andy Shevchenko , Bartosz Golaszewski , Daniel Scally , Danilo Krummrich , Greg Kroah-Hartman , Hans Verkuil , Heikki Krogerus , Joe Perches , Johan Hovold , Kees Cook , Laurent Pinchart , Len Brown , Linus Torvalds , Linus Walleij , Namhyung Kim , "Rafael J. Wysocki" , Rob Herring , Sakari Ailus , Saravana Kannan , Steven Rostedt , Tom Zanussi , linux-acpi@vger.kernel.org, driver-core@lists.linux.dev, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-gpio@vger.kernel.org Subject: [PATCH v3 4/5] string: Add [C]QChar_of() and QVoid_of() Message-ID: <415453a31ebf1aed3b41da1a28913f5cbe58f175.1794323750.git.alx@kernel.org> X-Mailer: git-send-email 2.55.0 References: X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="edzk26a3huisnjhz" Content-Disposition: inline In-Reply-To: --edzk26a3huisnjhz Content-Type: text/plain; protected-headers=v1; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable From: Alejandro Colomar To: linux-hardening@vger.kernel.org Cc: Krzysztof Kozlowski , "Maciej W. Rozycki" , Geert Uytterhoeven , Alejandro Colomar , Andreas Schwab , Andy Shevchenko , Bartosz Golaszewski , Daniel Scally , Danilo Krummrich , Greg Kroah-Hartman , Hans Verkuil , Heikki Krogerus , Joe Perches , Johan Hovold , Kees Cook , Laurent Pinchart , Len Brown , Linus Torvalds , Linus Walleij , Namhyung Kim , "Rafael J. Wysocki" , Rob Herring , Sakari Ailus , Saravana Kannan , Steven Rostedt , Tom Zanussi , linux-acpi@vger.kernel.org, driver-core@lists.linux.dev, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-gpio@vger.kernel.org Subject: [PATCH v3 4/5] string: Add [C]QChar_of() and QVoid_of() Message-ID: <415453a31ebf1aed3b41da1a28913f5cbe58f175.1794323750.git.alx@kernel.org> References: MIME-Version: 1.0 In-Reply-To: These macros serve to implement qualifier-generic macros as those specified in ISO C23. Signed-off-by: Alejandro Colomar --- include/linux/string.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/include/linux/string.h b/include/linux/string.h index 12e31c17f0d3..9e59f9697c9e 100644 --- a/include/linux/string.h +++ b/include/linux/string.h @@ -14,6 +14,36 @@ #include #include =20 +/** + * QVoid_of - qualified void of + * + * @p: Pointer to test for qualifiers + * + * This macro produces the type name 'void', + * qualified with any qualifiers present in the element of @p. + */ +#define QVoid_of(p) typeof((__QVoidptr_of(p)){0}[0]) +#define __QVoidptr_of(p) typeof(1?(p):(void*){0}) + +/** + * QChar_of - qualified char of + * + * @Q: Qualifier to test. + * @p: Pointer to test for the @Q qualifier + * + * This macro produces the type name 'char', + * @Q-qualified iff the input pointer points to a @Q-qualified element. + */ +#define QChar_of(Q, p) typeof \ +( \ + _Generic((QVoid_of(p) *){0}, \ + Q void *: (Q char){0}, \ + void *: ( char){0} \ + ) \ +) +// CQChar_of - const qualified char of +#define CQChar_of(p) QChar_of(const, p) + extern char *strndup_user(const char __user *, long); extern void *memdup_user(const void __user *, size_t) __realloc_size(2); extern void *vmemdup_user(const void __user *, size_t) __realloc_size(2); --=20 2.55.0 --edzk26a3huisnjhz Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEES7Jt9u9GbmlWADAi64mZXMKQwqkFAmrzOVwACgkQ64mZXMKQ wqnzfA/9GrZZK+W+KOb7/G65cAjO7rx/x9rBOsQvMCeJEwmDSJn3Be/VpJVier7+ sUkHYATUyU+q+9GkR0OGKk0Kq1pf8y2wU/NJGFtM4FovgbG6NpZ3ciKSnftLI7p0 JqixEpOHsDJtGgO4LvA1KiJnJhyWOLDIETHMCSEcn3ZLn4VLPfHa0rWIizUCkNpn BapLhk/76ZVtaUjc17zzlLnApa9VNwi6zdJZWnkicVGFVv8aUc8nXR6tarGsnbkN 2VvWCHG32+Ex9+bXDNcTs4MvOS/m/o9A8k8uttKdhmV4vYu+4NeIBo3wCo0W1bbV fZI5ZFDqnbNWLnnm8DxyHegN5+fo+yorzE5rD0Bqm9y4Cip0knABMDhw1z7vKT0i SOvZ4mRB89i8iTMgRF0yLW9vYB5busWZ/xtTKlfQltGV3e/r/QO3f6J8YATYNPxY 0rwViY3O36B7vTpQzAZRSKFElDojX8yJNEmEggc2kHWSyJ8YOSkUJd+1uAtWhm/p uTZicBjl1vKF7q11LevobiEZIPOobOEj9sB1IhqtVZSEbiRoYjJLzmODg8teLs1Y wi0WKcqUqdfQrLzPfWHIrvwtzGRxC/sByE9v+PT7xkauL8zQ1jSgQscLR+RrX1JB uXAh0bzgn8Lq9sxaWF6XoRmqYNObiby+RGvcm2t2nF0UaJwWvm8= =llC6 -----END PGP SIGNATURE----- --edzk26a3huisnjhz--