Received: by 2002:a05:6a10:9848:0:0:0:0 with SMTP id x8csp2723768pxf; Sat, 27 Mar 2021 23:40:19 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzW6hSTLeNDaRCpy8HHPkUESxfiHrN/H0r5FncZtCIAYmpBE15rpkb9VTgW24RGwO1iGSxY X-Received: by 2002:a17:907:270d:: with SMTP id w13mr646508ejk.340.1616913619441; Sat, 27 Mar 2021 23:40:19 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1616913619; cv=none; d=google.com; s=arc-20160816; b=TBqGlXUQctXbYRO+Nyj8s0cFTmKTvXfAmM5i5wqgh38nsncR6gBaSA4oZDGvkL5pqH l/JFUfNm9rmMh90EXzARyoYghcOjKYGvlrLWK0xbPSe+4lOGyqd1Cq24Ak6VAbQBpPuV HMmh6s/hDEA9XqLpKqsFpYK8djIZFvKQexy+WhfbR+B1nSaPufOsJ71VbzxgS4BKj1v5 jjhFlNCmKkC+W6dj/RhVPbHUxjPrXgBJ/9ynxfCSPwHXcBwDalDwsywqbR143HDp+qH3 4R4NY+HNEK8X2N1s5Mrn0c+1p1EyGNglptj27XUAQP/Wz7fptZr62fN/lza5Z+oFXQLy J0qA== 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=0MVTofssFi60uSOTfrEb4zqv2it/SjnvoW97YaktjmHI6B8ntChcf/jfXtdVk4nEaz X2ai32nMF+0Bjqqh8SQ+wcCMcxN+xMopkHF+6vaaIZprAkbRLwknjZphHNHlZc3NJTAe dt3NHM3Gygr2SwvYery21BsIxpdDLWefxJe0PBMPkDbHbQtzSMwSClvMMTrIBFRNRdwh wqnmcytS40+0dHyZooryK79fH2OoLytImM495Iw/mIYpb4HGcCK46n7B5spuZaX1W9bs vuhCX+FKH582wX0M57++X41roUaL7OuX7ZiLLpHta8M1wYHdc1y/alDvKjcjfB6V61BE 183w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=RIkij08x; 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 f6si10060135edm.418.2021.03.27.23.39.57; Sat, 27 Mar 2021 23:40:19 -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=RIkij08x; 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 S231299AbhC1GcB (ORCPT + 99 others); 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