From nobody Thu Sep 19 16:48:18 2024 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 BDE5F86131; Fri, 16 Aug 2024 00:14:16 +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=1723767256; cv=none; b=P2OsB1mzkABMEcGLtWjbXm6TMiHMPWZeX3IX7deuGdeDEcsHgVtpor1FBLaSFWvotMGbFxUafDoo08KwR18eZz4lZ4E+3KsR2/DNFaV6QTdfI1BGP3e+TBA2ayhRLcdcjzw8YpkRy0MpDjvrGknXw2t3deGh2hRBX6Jq1rkQ2Ac= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723767256; c=relaxed/simple; bh=rW6cn/nXJ3kgyxI1gVJEu/DxMLK8/5Ne1MREjzDSSjs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mgOeAL5qi+Bj/FQh3PX/egzIyCk2RodsxiAK0SI+2ufIDEV3yrahAc7KAdChYx+GYrg0IoGTEqGW/ntUH83TmNs9TLjvAvI0SMydrWVLuGZ+48coLaTfupA5YiNp3m8b9Fkhdeqlf3Pf6yYObqlqZIRdddO+2EKQ2xcM3hMmTuA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WqXor/E+; 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="WqXor/E+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4286C4AF11; Fri, 16 Aug 2024 00:14:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723767256; bh=rW6cn/nXJ3kgyxI1gVJEu/DxMLK8/5Ne1MREjzDSSjs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WqXor/E+3OtKDVZYS3a96f+AYYecETGqzOUglOaueHa5Vlw+FyhTOgesTNX8DXyYQ feTxEQGGOMjBQtufSDQVIyINAeEt1RX7pEbrHHnkiO8RiwEe8dbS6mnGdfNWQ7XN2G IUb7quUg4sTLPb4vtiLBghpLWRzbWoQhcmHtNF4CoCn8R9OYFU6PyF7Ik1E2/QCVWF nql9dgriy61q8p4Xf3HT6uLmU+s5Xb+pXLQvqrUnRdrVqOBfcp43OqlXmD78rN08JS Svgry7HwrJQxFFW/sX1tgfhx42X71TYl2tFL5OQE67jkSJdsODEa5ddF8COQrbcfg6 4xK7yVyVUgmsQ== From: Danilo Krummrich To: ojeda@kernel.org, alex.gaynor@gmail.com, wedsonaf@gmail.com, boqun.feng@gmail.com, gary@garyguo.net, bjorn3_gh@protonmail.com, benno.lossin@proton.me, a.hindborg@samsung.com, aliceryhl@google.com, akpm@linux-foundation.org Cc: daniel.almeida@collabora.com, faith.ekstrand@collabora.com, boris.brezillon@collabora.com, lina@asahilina.net, mcanal@igalia.com, zhiw@nvidia.com, cjia@nvidia.com, jhubbard@nvidia.com, airlied@redhat.com, ajanulgu@redhat.com, lyude@redhat.com, linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-mm@kvack.org, Danilo Krummrich Subject: [PATCH v6 21/26] rust: alloc: implement `contains` for `Flags` Date: Fri, 16 Aug 2024 02:11:03 +0200 Message-ID: <20240816001216.26575-22-dakr@kernel.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240816001216.26575-1-dakr@kernel.org> References: <20240816001216.26575-1-dakr@kernel.org> 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" Provide a simple helper function to check whether given flags do contain one or multiple other flags. This is used by a subsequent patch implementing the Cmalloc `Allocator` to check for __GFP_ZERO. Reviewed-by: Alice Ryhl Signed-off-by: Danilo Krummrich Reviewed-by: Benno Lossin --- rust/kernel/alloc.rs | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/rust/kernel/alloc.rs b/rust/kernel/alloc.rs index 1feabc817d00..5c66229a7542 100644 --- a/rust/kernel/alloc.rs +++ b/rust/kernel/alloc.rs @@ -34,7 +34,7 @@ /// They can be combined with the operators `|`, `&`, and `!`. /// /// Values can be used from the [`flags`] module. -#[derive(Clone, Copy)] +#[derive(Clone, Copy, PartialEq)] pub struct Flags(u32); =20 impl Flags { @@ -42,6 +42,11 @@ impl Flags { pub(crate) fn as_raw(self) -> u32 { self.0 } + + /// Check whether `flags` is contained in `self`. + pub fn contains(self, flags: Flags) -> bool { + (self & flags) =3D=3D flags + } } =20 impl core::ops::BitOr for Flags { --=20 2.46.0