From nobody Sun Jun 28 10:35:27 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D71FC433F5 for ; Tue, 8 Feb 2022 17:21:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1384022AbiBHRVP (ORCPT ); Tue, 8 Feb 2022 12:21:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352618AbiBHRVN (ORCPT ); Tue, 8 Feb 2022 12:21:13 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B017FC061579 for ; Tue, 8 Feb 2022 09:21:12 -0800 (PST) Date: Tue, 8 Feb 2022 18:21:10 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1644340871; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type; bh=5V/2u/5F/SM5/Cd1EuQBv9Q9y3ryDORqqogy80F2+6Q=; b=X0u0L23luJuJPqbiEVgv0HSxKaaWz6rDGA5Yjis1/CIAl357EB9B3QH5pu6w4HXxOZefMA EpR8oIkX00CvCuqOoCGL19hp9HVxA8hKY/sxiBMLRmuK5UQ0KeH4WRWcW+Zuzg2AJelSxJ 7xdzS/bB1BJdblXJ60AGQWiN4TcVlbjuYgLYpfD8nKLO0P3JmFwtgo2/t87H1rC7UdOa4D xAYX0yIDvSI53xBs95uoadPaMXVZj2zojgehUdFuSl7y7BIYgg+JxJWmGyBoVM1nfBLLvi EVFNg73rqpd0/kAuvB1gM4ab5Nvg69t7Djas9anjsuDlZQu5p5QmgpiaLAtq2w== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1644340871; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type; bh=5V/2u/5F/SM5/Cd1EuQBv9Q9y3ryDORqqogy80F2+6Q=; b=QsdtkZxzCAQY0tcMWcHku3Vu04DhA17TpVJLJ+LCEmchCrzuZrs+rzehvu5yb6kJulMfSh X6VQFDcpMnFyqUAg== From: Sebastian Andrzej Siewior To: linux-kernel@vger.kernel.org Cc: Andrew Morton , Thomas Gleixner , Peter Zijlstra , Ingo Molnar , Will Deacon , Waiman Long Subject: [PATCH] locking: Enable RT_MUTEXES by default on PREEMPT_RT. Message-ID: MIME-Version: 1.0 Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The CONFIG_RT_MUTEXES option is enabled by CONFIG_FUTEX and CONFIG_I2C. If both are disabled then a CONFIG_PREEMPT_RT build fails to compile. It is not possible to have a PREEMPT_RT kernel without RT_MUTEX support because RT_MUTEX based locking is always used. Enable CONFIG_RT_MUTEXES by default on PREEMPT_RT builds. Signed-off-by: Sebastian Andrzej Siewior --- init/Kconfig | 1 + 1 file changed, 1 insertion(+) --- a/init/Kconfig +++ b/init/Kconfig @@ -2058,6 +2058,7 @@ source "arch/Kconfig" =20 config RT_MUTEXES bool + default y if PREEMPT_RT =20 config BASE_SMALL int