Received: by 2002:a05:6a10:9848:0:0:0:0 with SMTP id x8csp455462pxf; Wed, 31 Mar 2021 07:36:34 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxhBk4E8ZJK/DT9YbySUwoFCpmM8lNmE2qEiDHwasZSGg6njldBU+93HTJTC+scxAzuTA6l X-Received: by 2002:a17:906:4e57:: with SMTP id g23mr3857651ejw.47.1617201394621; Wed, 31 Mar 2021 07:36:34 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1617201394; cv=none; d=google.com; s=arc-20160816; b=Uq/bfaTK6AIFwcg8qElZ2rUWT8QpfAuVabFoGqHaDEiA028zRdT3Ax0EQnwa7oiGxt u/q5vzo+J026iMSQef/5njJq+mr1dHIg1yojgk4NjAU+2EHvURf7lltNXQtfEOAHtCD7 NYqKV0XBIerye1ZA7iVrZVOFW8kcxDUKp92IiOrb1cxTDS/QMwzVGadjvqj2GOcUuVhl AH494lr7g9hsxc+gpxe+ORY4rbLkJ+aQavfioSwbc21dY6O7jbeH4GwROzJLW3ZLaYv4 up2Cg/yjaCzY443appOB50RvUgA5zWS7OD5++kbjEMUAeXGYt5g+CXK51Lwrja4nasOt an6Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:references:in-reply-to:message-id:date:subject :cc:to:from:dkim-signature; bh=yNyeNdIh6uzyW0RNdiPU4zCaLt1dKxOLcPPC4XrZ3HA=; b=Z+CMhSZ/OT3iV4b4lOH26u83tn5CVT284FFpsFMHDV01pBCjzugTHFt8zrGiivAEdE riJJoh/GnFLBZBXHjDgXbMwoL+w0ULYof4gaf557UVya5t18iqyuArKIBUim28oncT5e c+Rucwi58xwMFR7xhjkvQSn0BNEom/+/hjYDLihTvfPldCyA+hhL0yUq8tZ2+G7dLPFi m/2WKIB3+mwLJAGR4wk5MyqCnm0e1j1XE914O5IJZCFiV7uT9azuHovj90391s3aRyo6 +a32iw9fQ5cd3U11AmtDYRfJTOV+8iaooWYo99Q8QqIFyRjq1MsRx1UIAhKd+EMqbjvw 7Hew== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=MuD7utNv; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id n24si1768250ejr.200.2021.03.31.07.36.10; Wed, 31 Mar 2021 07:36:34 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=MuD7utNv; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236195AbhCaOdN (ORCPT + 99 others); Wed, 31 Mar 2021 10:33:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:44146 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236067AbhCaOck (ORCPT ); Wed, 31 Mar 2021 10:32:40 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 717C960FF1; Wed, 31 Mar 2021 14:32:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1617201160; bh=O2KxmIPB+fHLZecH69jIXhtq++wb564lj/icyjeUAfo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MuD7utNvxc71QnlLEo6eyoz8UG0sDZiPBtJt3hag6/s4X/dkfRLDhQ5OqJXJFt+j6 9qXx33FPUmx3G35TT6KpggWZk8CzgnRPRkmBuxb41XLDNB+DLsaZLfn7okWhGAP/fd XIcnJzsaYKQDC+07SeSrpysX9+39Fr229UOr1ud5VmRf3ZrA9MM7B1eQrw7Q9Xqnw1 QLPvIZ3ogIZFd7LK13OYk2vgisiZmroVX6LOouaaODc0ya16hQUPWrUf3ielzPGQMu g+xqdXQe1Wujk2SS7zfx9ORiUOU/DX/5BKyLBaTlndIEiV02In4jpH7PAyTKRovgEx KBwMY3BPTvyjg== 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 v6 7/9] sparc: qspinlock: Add ARCH_USE_QUEUED_SPINLOCKS_XCHG32 Date: Wed, 31 Mar 2021 14:30:38 +0000 Message-Id: <1617201040-83905-8-git-send-email-guoren@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1617201040-83905-1-git-send-email-guoren@kernel.org> References: <1617201040-83905-1-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