From mboxrd@z Thu Jan 1 00:00:00 1970 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 6F6443203B7 for ; Wed, 20 Aug 2025 14:55:00 +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=1755701700; cv=none; b=M286GQCTF8CwjBkN2qkhq0rUrqpRbbo9C+CTh8lNiYDkb+b0OCoGQNcw4HngdEVy6vEkPZKexEY99nnT5FRU6da6PoQtBkqqVF/JggKMSzWSlpnOU2VZhSMJii9M5I79788nyAm6yWhhaEYXvyRrD1uDcwf+1GTFKQCtYPWEsRs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755701700; c=relaxed/simple; bh=sue36pE+CqYYo58Lb83BNtLDKuqbKL3Mc+bZnC3ZFvg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VLFevlYaQM6idsjdZ8BIMKL4gbmdLV+XdBEwPPW2/LKbLx4Elk7f9YbaPx3K7pFRdOII9fFKlFcAHMi/YnIHTGGuUqqKt8FmjAmOBH2T+teZ+ToagRaFZs9DwG1D5tRgvzNTh2JUJxUwbh9MkneXXMo2JmwXKdeF8MgJ9mORGxs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Rugya7T3; 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="Rugya7T3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC228C113CF; Wed, 20 Aug 2025 14:54:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755701700; bh=sue36pE+CqYYo58Lb83BNtLDKuqbKL3Mc+bZnC3ZFvg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Rugya7T3pVD1iDaoeT5IgZdrBdyha+e7CiXUNJCeqVfU3e8/FgF6oKnDKJIIjhrio QmLbqsS40Gname+ofKatwqQXkCQjWKPFYT9IR/bxB7RePdPykRGAXk1nHrUoA2/4IG MXPo918IHMQbnQMDmGZQCTOs4bO23DBxnlAZpQcbBC+RLKGOJ2wOE8GoDjEH8aQnfQ f/0cnx7oz9g8anpmIn47kg/63+U7PflnxZJl7pUPLpCTyyE2p3ArHTB+jTe1eAzVjA 0E6ExHed93hvUcCuyBW52LJlD1Dipre9+r0xGsZct6NeplSn+u6b3fz3snRKt2RTrJ JgL5pM35K1K/w== From: Danilo Krummrich To: lorenzo.stoakes@oracle.com, vbabka@suse.cz, Liam.Howlett@oracle.com, urezki@gmail.com, ojeda@kernel.org, alex.gaynor@gmail.com, boqun.feng@gmail.com, gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org, a.hindborg@kernel.org, aliceryhl@google.com, tmgross@umich.edu, abdiel.janulgue@gmail.com, acourbot@nvidia.com Cc: rust-for-linux@vger.kernel.org, Danilo Krummrich , Daniel Almeida Subject: [PATCH v5 4/7] rust: page: define trait AsPageIter Date: Wed, 20 Aug 2025 16:53:40 +0200 Message-ID: <20250820145434.94745-5-dakr@kernel.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250820145434.94745-1-dakr@kernel.org> References: <20250820145434.94745-1-dakr@kernel.org> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The AsPageIter trait provides a common interface for types that provide a page iterator, such as VmallocPageIter. Subsequent patches will leverage this to let VBox and VVec provide a VmallocPageIter though this trait. Reviewed-by: Alice Ryhl Reviewed-by: Alexandre Courbot Tested-by: Alexandre Courbot Reviewed-by: Daniel Almeida Signed-off-by: Danilo Krummrich --- rust/kernel/page.rs | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/rust/kernel/page.rs b/rust/kernel/page.rs index 631718a6ad7d..75ef096075cb 100644 --- a/rust/kernel/page.rs +++ b/rust/kernel/page.rs @@ -103,6 +103,18 @@ fn deref(&self) -> &Self::Target { } } +/// Trait to be implemented by types which provide an [`Iterator`] implementation of +/// [`BorrowedPage`] items, such as [`VmallocPageIter`](kernel::alloc::allocator::VmallocPageIter). +pub trait AsPageIter { + /// The [`Iterator`] type, e.g. [`VmallocPageIter`](kernel::alloc::allocator::VmallocPageIter). + type Iter<'a>: Iterator> + where + Self: 'a; + + /// Returns an [`Iterator`] of [`BorrowedPage`] items over all pages owned by `self`. + fn page_iter(&mut self) -> Self::Iter<'_>; +} + /// A pointer to a page that owns the page allocation. /// /// # Invariants -- 2.50.1