From patchwork Tue Dec 18 22:10:45 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Andrzej Siewior X-Patchwork-Id: 154215 Delivered-To: patch@linaro.org Received: by 2002:a2e:299d:0:0:0:0:0 with SMTP id p29-v6csp4236491ljp; Tue, 18 Dec 2018 14:11:30 -0800 (PST) X-Google-Smtp-Source: AFSGD/XaShdcK4tVxeXbu8E0FG0/ZchNSFr7FXAtk/qGM7B0fe9pS2Hjl5Jfi2QAxji6a5uPjeGL X-Received: by 2002:a63:2f86:: with SMTP id v128mr4214618pgv.407.1545171090568; Tue, 18 Dec 2018 14:11:30 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1545171090; cv=none; d=google.com; s=arc-20160816; b=IW5vc9TANlKnojMYv3rcB4WJ5b2Emg2c1Hr3N/XRM/FFrsTCCbf/HfdopQPNYotDdL 7k+QgjZFLzrV6BlpOy6eIUPh4dkYmXKI2wGG0vrcOd2ulmVuFgUV6r/vuqeccteHn6d5 ay9V3LVzLH7vj1zZJRdRYvJ6oTRGzQna98SIJQTDbMSB40/ykoBkWvXkCZivqJ7wDrkT DYu2VbdlGa/T8f6EUNmukhFRIwkwgrsxVgKZfFjWgqFEHtJ3XYkUZXACc4dYQUSwqprq THNs8RcVdPO2yvs6BqbZD2lmxXvIjUS5rfUTHAWn6XEVjyHmqdVyhRymcDQbHA0JsgZ7 9nQA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=bhnmtu0nQOZ/XQI8Lo4PjA3OpGo83tcEf7fFtrOjqio=; b=Eg8v60Dj8sY227k1M9Y3/RFeVLhxzUZNCba4uoES9AVgdEnBVGsfazG+gtyKLN+2oe c3GjqDblvYgQLJ+wqUuwWszcoW7QcW8ps1gwKsmfCDpKRgxFo2l84kwI0e3QHVEBdREg pp8vC75XKz1EVQI8tJh5a8JZ+YQfVgcy0fqOgWG1bQcphZc5lreSShAbOS2SaRUBlu9r wEczbpAt0sFtLZJcFkF6A9ASF21DoC4O7uTChUK+24YftmxnRhVQ7zadxlgbt2PQx3Fq KVahDt7Oocx1y5zj/HMj6R2OEyFjKbEhF+A7K02F9Qxu1M4Vbaf4DSKpEtqtfh+Ug5v+ TZSA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of stable-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=stable-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id c8si13817215pgl.507.2018.12.18.14.11.30; Tue, 18 Dec 2018 14:11:30 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of stable-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of stable-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=stable-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727594AbeLRWL3 (ORCPT + 15 others); Tue, 18 Dec 2018 17:11:29 -0500 Received: from Galois.linutronix.de ([146.0.238.70]:57218 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727316AbeLRWL2 (ORCPT ); Tue, 18 Dec 2018 17:11:28 -0500 Received: from localhost ([127.0.0.1] helo=bazinga.breakpoint.cc) by Galois.linutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1gZNaF-000889-L1; Tue, 18 Dec 2018 23:11:23 +0100 From: Sebastian Andrzej Siewior To: stable@vger.kernel.org Cc: Peter Zijlstra , Will Deacon , Thomas Gleixner , Daniel Wagner , bigeasy@linutronix.de, Waiman Long , Linus Torvalds , boqun.feng@gmail.com, linux-arm-kernel@lists.infradead.org, paulmck@linux.vnet.ibm.com, Ingo Molnar Subject: [PATCH STABLE v4.9 06/10] locking/qspinlock: Remove duplicate clear_pending() function from PV code Date: Tue, 18 Dec 2018 23:10:45 +0100 Message-Id: <20181218221049.6816-7-bigeasy@linutronix.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20181218221049.6816-1-bigeasy@linutronix.de> References: <20181218221049.6816-1-bigeasy@linutronix.de> MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Will Deacon commit 3bea9adc96842b8a7345c7fb202c16ae9c8d5b25 upstream. The native clear_pending() function is identical to the PV version, so the latter can simply be removed. This fixes the build for systems with >= 16K CPUs using the PV lock implementation. Reported-by: Waiman Long Signed-off-by: Will Deacon Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: boqun.feng@gmail.com Cc: linux-arm-kernel@lists.infradead.org Cc: paulmck@linux.vnet.ibm.com Link: http://lkml.kernel.org/r/20180427101619.GB21705@arm.com Signed-off-by: Ingo Molnar Signed-off-by: Sebastian Andrzej Siewior --- kernel/locking/qspinlock_paravirt.h | 5 ----- 1 file changed, 5 deletions(-) -- 2.20.1 diff --git a/kernel/locking/qspinlock_paravirt.h b/kernel/locking/qspinlock_paravirt.h index 9c07c72fb10e9..af2a24d484aab 100644 --- a/kernel/locking/qspinlock_paravirt.h +++ b/kernel/locking/qspinlock_paravirt.h @@ -105,11 +105,6 @@ static __always_inline void set_pending(struct qspinlock *lock) atomic_or(_Q_PENDING_VAL, &lock->val); } -static __always_inline void clear_pending(struct qspinlock *lock) -{ - atomic_andnot(_Q_PENDING_VAL, &lock->val); -} - static __always_inline int trylock_clear_pending(struct qspinlock *lock) { int val = atomic_read(&lock->val);