From nobody Mon Oct 6 20:57:07 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 3AB472FEE32 for ; Thu, 17 Jul 2025 18:44:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752777850; cv=none; b=GrjBOZ1tcKvUMfNxwsscBMbvKJl+NEKb4Wsm75lwM9NEiAlJ+w+Z0M6HIJ69oCnZGgY7gFe6aP6OW/Ifv6b6Zdsfesa0dy0nsumj1KgYe4mvw7MAO8q0QNdBc3cAMsSgID3jeXnOP9EgqgOSbng9aMN2QbLKfuD9eeSY7KubeR4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752777850; c=relaxed/simple; bh=VC8WDukeh9OwMNpoeQiJvdW7sRso+KzAfeZjCg3qyWI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QSgyMvpqustLZ0Scuf+00zxHCRIV8RIvhYj07Dj9yBguyjyx7WWtLfkzm165K8qdDEIlMddwKlSp1xF3i1PdDyezSQ+kFA5zThulkNimF6K4hhCRRRd20wgLTTS6Y+LooSMAbJZWEvrCiKxaENJTX8qk7qluBzg6QzU2X2xmJMQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=BjssqP5F; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="BjssqP5F" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1752777847; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Etkjz+aUp4PF+9X5O/5ljNHVpe734yWQe/o9GjeX31I=; b=BjssqP5F0NlGdJAbntRgNHcPwokmm9X/IYczQ6IbElDMUkMZor+YtYaS2BBfEVf/KNz3Ta 6RrYUznJrdmAgldXAYZCfdHPatdGaGM86xK9LpsovurbJZEYJvVe8rLhyJT8+ojaLlzWOq rmcgFQeIO5OUdhJ8L2TZLlY0x04TQkE= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-498-7GBMfnZwMH65YW4z-94XSg-1; Thu, 17 Jul 2025 14:44:03 -0400 X-MC-Unique: 7GBMfnZwMH65YW4z-94XSg-1 X-Mimecast-MFC-AGG-ID: 7GBMfnZwMH65YW4z-94XSg_1752777841 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E26141800365; Thu, 17 Jul 2025 18:44:00 +0000 (UTC) Received: from chopper.redhat.com (unknown [10.22.66.69]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 0A049180049D; Thu, 17 Jul 2025 18:43:57 +0000 (UTC) From: Lyude Paul To: rust-for-linux@vger.kernel.org, Thomas Gleixner , Boqun Feng , linux-kernel@vger.kernel.org, Daniel Almeida Cc: Peter Zijlstra , Ingo Molnar , Will Deacon , Waiman Long , Miguel Ojeda , Alex Gaynor , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich Subject: [PATCH v11 13/14] rust: sync: lock/global: Add BackendInContext support to GlobalLock Date: Thu, 17 Jul 2025 14:38:05 -0400 Message-ID: <20250717184055.2071216-14-lyude@redhat.com> In-Reply-To: <20250717184055.2071216-1-lyude@redhat.com> References: <20250717184055.2071216-1-lyude@redhat.com> 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 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 Content-Type: text/plain; charset="utf-8" Now that we have the ability to provide an explicit lifetime for a GlobalGuard and an explicit Backend for a GlobalGuard, we can finally implement lock_with() and try_lock_with(). Signed-off-by: Lyude Paul --- rust/kernel/sync/lock/global.rs | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/rust/kernel/sync/lock/global.rs b/rust/kernel/sync/lock/global= .rs index f9a9c4bdc46b0..1f28bf5fc8851 100644 --- a/rust/kernel/sync/lock/global.rs +++ b/rust/kernel/sync/lock/global.rs @@ -89,6 +89,34 @@ pub fn try_lock(&'static self) -> Option> { inner: self.inner.try_lock()?, }) } + + /// Lock this global lock with the provided `context`. + pub fn lock_with<'a, B>( + &'static self, + context: ::Context<'a>, + ) -> GlobalGuard<'a, G, B> + where + G::Backend: Backend, + B: Backend, + { + GlobalGuard { + inner: self.inner.lock_with(context), + } + } + + /// Try to lock this global lock with the provided `context`. + pub fn try_lock_with<'a, B>( + &'static self, + context: ::Context<'a>, + ) -> Option> + where + G::Backend: Backend, + B: Backend, + { + Some(GlobalGuard { + inner: self.inner.try_lock_with(context)?, + }) + } } =20 /// A guard for a [`GlobalLock`]. --=20 2.50.0