From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EB98AC4345A for ; Sun, 28 Mar 2021 06:32:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DB4C36191A for ; Sun, 28 Mar 2021 06:32:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231309AbhC1GcB (ORCPT ); Sun, 28 Mar 2021 02:32:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:56878 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230502AbhC1Gbj (ORCPT ); Sun, 28 Mar 2021 02:31:39 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id AFCCB61999; Sun, 28 Mar 2021 06:31:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616913099; bh=O2KxmIPB+fHLZecH69jIXhtq++wb564lj/icyjeUAfo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RIkij08xlS8DB8+yEsaHfhkJ4frVk8aqcXZKUjc8aZRsRg14dDqPdSr8TSjbqYWar YZa7xXiDmepsbU0aY2OQB+g9ZqgA6O0epYM/s/Lq/CGXTTUZR/qeGjvktEkSawSenY 6uspD6vEI92SJzbXoQjxXYH9frX6UTrSuMhM5XRheYpddQnE2p8LoyPEDQ5x0vhDc+ aPIyENu/RTIQJgeveEE/LmORCiHcAjMknUD4XEEpdndhKUefcId80TspfCdlvafStJ 6CIxmOlQadSXN+7398RrpGZOq23MCSKdY+hW6nlsOKJHvtdBV75Hz84ouhtYXGQH+u 8EGq83B9rHGOg== From: guoren@kernel.org To: guoren@kernel.org Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-xtensa@linux-xtensa.org, openrisc@lists.librecores.org, sparclinux@vger.kernel.org, Guo Ren , Arnd Bergmann , "David S . Miller" , Rob Gardner Subject: [PATCH v5 6/7] sparc: qspinlock: Add ARCH_USE_QUEUED_SPINLOCKS_XCHG32 Date: Sun, 28 Mar 2021 06:30:27 +0000 Message-Id: <1616913028-83376-7-git-send-email-guoren@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1616913028-83376-1-git-send-email-guoren@kernel.org> References: <1616913028-83376-1-git-send-email-guoren@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Guo Ren We don't have native hw xchg16 instruction, so let qspinlock generic code to deal with it. Using the full-word atomic xchg instructions implement xchg16 has the semantic risk for atomic operations. This patch cancels the dependency of on qspinlock generic code on architecture's xchg16. Signed-off-by: Guo Ren Cc: Arnd Bergmann Cc: David S. Miller Cc: Rob Gardner --- arch/sparc/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 164a5254c91c..1079fe3f058c 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -91,6 +91,7 @@ config SPARC64 select HAVE_REGS_AND_STACK_ACCESS_API select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS + select ARCH_USE_QUEUED_SPINLOCKS_XCHG32 select GENERIC_TIME_VSYSCALL select ARCH_CLOCKSOURCE_DATA select ARCH_HAS_PTE_SPECIAL -- 2.17.1