From patchwork Mon Sep 14 20:42:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 11775687 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 23B2B92C for ; Tue, 15 Sep 2020 07:07:45 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C97FD206C9 for ; Tue, 15 Sep 2020 07:07:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="uO+ld7WS"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="kFv5VCuw" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C97FD206C9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 956586E83E; Tue, 15 Sep 2020 07:07:19 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0D2746E58E for ; Mon, 14 Sep 2020 20:45:09 +0000 (UTC) Message-Id: <20200914204440.969090025@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1600116305; 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: content-transfer-encoding:content-transfer-encoding: references:references; bh=sKqpUZgQTSsofOfA1QdAWY2+LBfcprxU0W9PCOpQ7JY=; b=uO+ld7WSpQY4vI69jsCu6Pz2RE8hrYv0Gf5wXsXRpBHLrOwLdq1mTBXH5kF9EQzLVjQ8dE L9nryl5hXhHp4GAEJYk/MN1jCD5uAR0Lc9CYUCyrB5iaNdnDjumEicqwlc1xyf56QorUoO uuiL35aqGp53wHsl6QrGtxfrGdDGxJVoXaT9mQ9NIlwuCv++BBc71raPpS2ikuywEKDnnN zT0iPxwQe8ky13mLBUJaRhmhYsg+53xaAsyMbRHht54GnYUMN6nTgx9WKPIo86mWiJiR3V E0z51mP0R5IBbmjI9Fx+cm/iN3YTH1Tg0+XL+eAlcW12YKEEbMjB3cccf0P+yQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1600116305; 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: content-transfer-encoding:content-transfer-encoding: references:references; bh=sKqpUZgQTSsofOfA1QdAWY2+LBfcprxU0W9PCOpQ7JY=; b=kFv5VCuwJvLbfOKz3oy8dhCG/DCPgG09EZhdEaXg5ZPKl5YxMOg851zb3lfo1duSkOyL7R vZCR4sfvPRoaC/AQ== Date: Mon, 14 Sep 2020 22:42:10 +0200 From: Thomas Gleixner To: LKML Subject: [patch 01/13] lib/debug: Remove pointless ARCH_NO_PREEMPT dependencies References: <20200914204209.256266093@linutronix.de> MIME-Version: 1.0 X-Mailman-Approved-At: Tue, 15 Sep 2020 07:07:18 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Juri Lelli , Peter Zijlstra , Sebastian Andrzej Siewior , Lai Jiangshan , dri-devel@lists.freedesktop.org, Ben Segall , linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-hexagon@vger.kernel.org, Will Deacon , Ingo Molnar , Anton Ivanov , linux-arch@vger.kernel.org, Vincent Guittot , Brian Cain , Richard Weinberger , Russell King , David Airlie , Ingo Molnar , Geert Uytterhoeven , Mel Gorman , intel-gfx@lists.freedesktop.org, Matt Turner , Valentin Schneider , linux-xtensa@linux-xtensa.org, Shuah Khan , "Paul E. McKenney" , Jeff Dike , linux-um@lists.infradead.org, Josh Triplett , Steven Rostedt , rcu@vger.kernel.org, linux-m68k@lists.linux-m68k.org, Ivan Kokshaysky , Rodrigo Vivi , Dietmar Eggemann , linux-arm-kernel@lists.infradead.org, Richard Henderson , Chris Zankel , Max Filippov , Linus Torvalds , linux-alpha@vger.kernel.org, Mathieu Desnoyers , Andrew Morton , Daniel Bristot de Oliveira Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" ARCH_NO_PREEMPT disables the selection of CONFIG_PREEMPT_VOLUNTARY and CONFIG_PREEMPT, but architectures which set this config option still support preempt count for hard and softirq accounting. There is absolutely no reason to prevent lockdep from using the preempt counter nor is there a reason to prevent the enablement of CONFIG_DEBUG_ATOMIC_SLEEP on such architectures. Remove the dependencies, which affects ALPHA, HEXAGON, M68K and UM. Signed-off-by: Thomas Gleixner Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner Cc: linux-alpha@vger.kernel.org Cc: Jeff Dike Cc: Richard Weinberger Cc: Anton Ivanov Cc: linux-um@lists.infradead.org Cc: Brian Cain Cc: linux-hexagon@vger.kernel.org Cc: Geert Uytterhoeven Cc: linux-m68k@lists.linux-m68k.org --- lib/Kconfig.debug | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1161,7 +1161,7 @@ config PROVE_LOCKING select DEBUG_RWSEMS select DEBUG_WW_MUTEX_SLOWPATH select DEBUG_LOCK_ALLOC - select PREEMPT_COUNT if !ARCH_NO_PREEMPT + select PREEMPT_COUNT select TRACE_IRQFLAGS default n help @@ -1323,7 +1323,6 @@ config DEBUG_ATOMIC_SLEEP bool "Sleep inside atomic section checking" select PREEMPT_COUNT depends on DEBUG_KERNEL - depends on !ARCH_NO_PREEMPT help If you say Y here, various routines which may sleep will become very noisy if they are called inside atomic sections: when a spinlock is