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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-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200914_164508_304904_962A75F4 X-CRM114-Status: GOOD ( 14.07 ) X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [193.142.43.55 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Juri Lelli , Peter Zijlstra , Sebastian Andrzej Siewior , Joonas Lahtinen , 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 , Jani Nikula , Rodrigo Vivi , Dietmar Eggemann , linux-arm-kernel@lists.infradead.org, Richard Henderson , Chris Zankel , Max Filippov , Linus Torvalds , Daniel Vetter , linux-alpha@vger.kernel.org, Mathieu Desnoyers , Andrew Morton , Daniel Bristot de Oliveira Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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