From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f73.google.com (mail-wm1-f73.google.com [209.85.128.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 02C9421D3E6 for ; Mon, 11 Aug 2025 09:39:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754905180; cv=none; b=lnrwhlh3sITCi7VGEyVnwjCdHvRWlQYHCp0RkW85kmmACcDAiwJf9O/Mx/Ss1FxK0cVi4mNYivjuS5oiHIHY6Xjc0N1pNOyi3JnQb3Rwp/2Y2pG5vtMMLya1nJWvhX8znr0WNGGYy9wkS3pQJ+kfKAfnkuBRNLNV8hD8ZZTthKY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754905180; c=relaxed/simple; bh=y4j5CDX+twNfOWnSZDQeS1iNPT/a8KEGUcdjXqfrqzk=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=kFwI8rOYKxIJ367q4IAk/uBeuE2xKZ5UU719kJzH0dkDQQl2QxaXmzn1MBaEtkzuE+XsIp++MRAGiDn5ENb5PDfNsWN9io0GxzWa663EPB9k+h2jUp2/qCCTjp5VPpk+/RHg/oUhSqLo09q/CDgWnrecx04ukzUF3aOLwXYX6qY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--aliceryhl.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=RKQqgeNc; arc=none smtp.client-ip=209.85.128.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--aliceryhl.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="RKQqgeNc" Received: by mail-wm1-f73.google.com with SMTP id 5b1f17b1804b1-459d4b5db81so23174565e9.2 for ; Mon, 11 Aug 2025 02:39:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1754905177; x=1755509977; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=EMnTZa0hu09hQK4MHqHVVwoEW2DRyBKmSxuuhXJfUcU=; b=RKQqgeNcNmWxbtzOe6OIjavx+iKtD5p6BP6WkcGpDxV3wBTODw7mqTI1C5yO5He+mp dXeDHSp7a1Q3GExl4cU664g/ZYhWVyhQIPwZydCqL4DjgfB3c5fKWUxjAapXWeDzqL88 qsfzGUQcVj/H94v13ck+YnF362UftZ2Pn1ilaauQ7xt9hrYCEDf492PlE/11hWouIIgv 1Lp3jSY2UZvlNBeCzD0KiBipDvuNsZVgUIbzXCGRnJBulA8mMxQBuAdxkTQ5dmeB5QxK nZQEUMdMHe1XTKY9TY2O9ERoJTWODE0ONFe9ymdxxhR9egzHaMW1eFcUsZ3QJu0ZZKpw 70Aw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754905177; x=1755509977; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=EMnTZa0hu09hQK4MHqHVVwoEW2DRyBKmSxuuhXJfUcU=; b=afSsm8Q+ICIaJE9Nz3a0OuYnQK+5Vmde2cI22lZuEbQpiNWJDqmlqDRAp7AeP0BIJs 21kBt+l2VSGBFnEnS5k9046/fn8MLYMhwgD9fQASNVpVAbYkc0oUUJbofQkQYAQsyYVm ZJ0/Dqr1NvgVpa1I1hHgIv6FLaYMks6ODXdmdAVrCnIvSHf76S27BBi7GLvWOdhWGaGp kpqRKfRh82SU1TYZZlA7Gr6FjiC/Fi83dw6FidcJu24NxDxc/E/i47WdDccWsdH28Dj3 mXZ3TdB/UuS2Ye89jv6yENfRhtrsIv8QQGIamtWzrRGFK0HA2tXkibuN8RjFHNFF+t5z CmTw== X-Forwarded-Encrypted: i=1; AJvYcCXs7PvblyR6XSvTzUmalAGw/qISEipXq3uIX4ev/3OkR+tWnP4ILstX4HAyjw05nHPbYXlsmgr6CTuAkdo=@vger.kernel.org X-Gm-Message-State: AOJu0YwGSlaZasg4m21MfEj5D+ZOvuz53Av3OflZ8eQdURTx9zeKx2Ig mC4fvOcBUhf86ExZZ8ptscpOFi1tZRld7yJRqO01ow/QYj9YjaVjSXJMV/6WahUBadC6VndtoPV 5eiDuUJKZuwjC+0G0tQ== X-Google-Smtp-Source: AGHT+IFT7h27MqE6VDgXteUcy3w8jAS+2Z96fj5nuIKzzs6pQOCqQDyObRy1nNyD3X3uF9z1SCe1X+iCSK04QMo= X-Received: from wmrn35.prod.google.com ([2002:a05:600c:5023:b0:459:d3ab:b232]) (user=aliceryhl job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:b93:b0:459:d408:d890 with SMTP id 5b1f17b1804b1-459f4fc4a95mr102409515e9.33.1754905177426; Mon, 11 Aug 2025 02:39:37 -0700 (PDT) Date: Mon, 11 Aug 2025 09:39:36 +0000 In-Reply-To: <20250811041039.3231548-2-fujita.tomonori@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250811041039.3231548-1-fujita.tomonori@gmail.com> <20250811041039.3231548-2-fujita.tomonori@gmail.com> Message-ID: Subject: Re: [PATCH v1 1/2] rust: Add cpu_relax() helper From: Alice Ryhl To: FUJITA Tomonori Cc: a.hindborg@kernel.org, alex.gaynor@gmail.com, ojeda@kernel.org, anna-maria@linutronix.de, bjorn3_gh@protonmail.com, boqun.feng@gmail.com, dakr@kernel.org, frederic@kernel.org, gary@garyguo.net, jstultz@google.com, linux-kernel@vger.kernel.org, lossin@kernel.org, lyude@redhat.com, rust-for-linux@vger.kernel.org, sboyd@kernel.org, tglx@linutronix.de, tmgross@umich.edu, acourbot@nvidia.com, daniel.almeida@collabora.com Content-Type: text/plain; charset="utf-8" On Mon, Aug 11, 2025 at 01:10:37PM +0900, FUJITA Tomonori wrote: > Add cpu_relax() helper in preparation for supporting > read_poll_timeout(). > > Signed-off-by: FUJITA Tomonori Reviewed-by: Alice Ryhl > +pub fn cpu_relax() { > + // SAFETY: Always safe to call. > + unsafe { bindings::cpu_relax() } > +} Let's mark this #[inline]. Alice