From nobody Tue Dec 2 02:18:55 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 C9A65371DE0 for ; Thu, 20 Nov 2025 21:48:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763675303; cv=none; b=l3jTgi+0R5px+gGodDkVu4l+r7AAiAPaKRrScSoo2yhatXfOJWF/dUMaxX+bY2lIguiwGii1YbcuIgVGViOQD596dJ2WWxzGzY2EwMvDb08PKchozdnoCJAICSkIUnyd4BAc/+E3tDKaMMnbn2WJGQCaZPyfadBrAi6R4WnVb5I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763675303; c=relaxed/simple; bh=v7HphVYOSoDjzgolUsw50PR+F94rfbAhD2k6v4F9Odw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Km+JBbdZ8bM9voPzbNH+zwtMVTDKK10a+xLJGNKOQ2CaVzXrLO7Hpmj2DnGy+o/+0LOjBLFUJT4Hp7+l1ZoyL/zNSuYehxWjBmjRhtpQnvp/BXiKEXmw5cFAEk05hYSnvlJ0eXF6s+Ep904kYVWWvnbMNqTMlozUuyJZaDRsORg= 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=e9Z0mgqO; arc=none smtp.client-ip=170.10.129.124 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="e9Z0mgqO" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1763675301; 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=NJe+xGA3sFkTouZGeLcVA+dJKjq7y15GrKqmDCb9Iuo=; b=e9Z0mgqOiRlnF/UXiUGOf/MeDDLMMq/7lXP2coY/UI4l+zm8+u5hQKyaD72IxKKQtDtFGi JhmCfJaYCblnF5H+WmBftiWtHj+l43Kr4fC2H4JORPA1fkeXZL+hN1fb6oyRrdN0KUSGOJ QpOIGPanQtgSut36lpeqy3b4ilwGV2s= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-271-ycSXCn-dNAq4L6fTap1Bug-1; Thu, 20 Nov 2025 16:48:16 -0500 X-MC-Unique: ycSXCn-dNAq4L6fTap1Bug-1 X-Mimecast-MFC-AGG-ID: ycSXCn-dNAq4L6fTap1Bug_1763675294 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (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-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3C9D11956063; Thu, 20 Nov 2025 21:48:14 +0000 (UTC) Received: from chopper.redhat.com (unknown [10.22.88.52]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 6125D1940E82; Thu, 20 Nov 2025 21:48:10 +0000 (UTC) From: Lyude Paul To: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Gleixner Cc: Boqun Feng , Daniel Almeida , Miguel Ojeda , Alex Gaynor , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Andrew Morton , Peter Zijlstra , Ingo Molnar , Will Deacon , Waiman Long Subject: [PATCH v14 15/16] rust: sync: lock/global: Add BackendInContext support to GlobalLock Date: Thu, 20 Nov 2025 16:46:07 -0500 Message-ID: <20251120214616.14386-16-lyude@redhat.com> In-Reply-To: <20251120214616.14386-1-lyude@redhat.com> References: <20251120214616.14386-1-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 3.0 on 10.30.177.17 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 31264b68086b3..20fbe11d1a04b 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 2.51.1