From patchwork Fri Feb 22 18:04:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 159046 Delivered-To: patch@linaro.org Received: by 2002:a02:48:0:0:0:0:0 with SMTP id 69csp2024436jaa; Fri, 22 Feb 2019 10:05:08 -0800 (PST) X-Google-Smtp-Source: AHgI3Ia99Ktp3cL5lZmdcu4Sb5tnyP7zd/QAza3ZI0VhuV3CMNed7kW8gnx1yP1F6KQcqXR1QYzl X-Received: by 2002:a62:788a:: with SMTP id t132mr5482658pfc.101.1550858708664; Fri, 22 Feb 2019 10:05:08 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1550858708; cv=none; d=google.com; s=arc-20160816; b=z1lpJqjXJJnyFBp3xumhNj18lk2UNR0MdtUblFuAcvHwAHaO9t3fidaaOTnAxShuXc VslSsTzMcuh/k6YTGGIZv5ehD7fouW3VXo9PzRWc5TqjnIdMsEMabzwO4vhotvdBLtam mo8ohVQHscgGbIXe/I+numpMLTDhyKX98blNK/FaxBi/1rsDK+0f7tBIXa3BM4paELY6 ScJeYtUqAlR7HfGdfj0M05VOUH0nqN368ntwbEyPg98juAoaK1/HkLP93alblDBYvAv5 1d2B/62bnjNc51VadjgbdCBZRIIfWMpb/zlkSnAEzlrC0qo4i54Y6Y53+LtKUHA76axq ml0g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from; bh=Q4qtXTqRSe8rlCSJjEAFI23F5Lraa2X0jYLKp897ba0=; b=VZbAX48w44ugK24wceoU6cQdC7eK4YBfMo3mhLRE0eTnVhAzPXnhPOOEljwfwbLi+j UuNZjrDF+1Wl0RyT8QCng/h6xcWpwkppHDkRU1lw1n1WOfDccC4/W8f9xRfC2xcaDAIc JEdTa9m9GCluQ4/y+g+A1txbwn1oarskwxQayzXLmcbzPXSKqjYcIbfhTk3DrEDyb/5t nRJGaV49dZZXTU0Xl4+26aRwcnl1pQEUsOttFFw+kfcV6r+yYw7dUCMEO86SieuT2eKQ yEhJNZrkvpgqCzsfclSqoFp9EmC/VNcObxSDZimV/XkXBE5dlfFZMkA/Nwa+N5X9nxt+ ZKrQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-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 v23si1894517pgn.542.2019.02.22.10.05.08; Fri, 22 Feb 2019 10:05:08 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-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 linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727681AbfBVSFH (ORCPT + 32 others); Fri, 22 Feb 2019 13:05:07 -0500 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:38178 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727656AbfBVSFF (ORCPT ); Fri, 22 Feb 2019 13:05:05 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 0E010165C; Fri, 22 Feb 2019 10:05:05 -0800 (PST) Received: from fuggles.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7D9A23F5C1; Fri, 22 Feb 2019 10:05:03 -0800 (PST) From: Will Deacon To: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org, andrew.murray@arm.com, arnd@arndb.de, catalin.marinas@arm.com, geert@linux-m68k.org, palmer@sifive.com, Will Deacon Subject: [PATCH v2 3/3] arm64: io: Hook up __io_par() for inX() ordering Date: Fri, 22 Feb 2019 18:04:54 +0000 Message-Id: <20190222180454.5992-4-will.deacon@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190222180454.5992-1-will.deacon@arm.com> References: <20190222180454.5992-1-will.deacon@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ensure that inX() provides the same ordering guarantees as readX() by hooking up __io_par() so that it maps directly to __iormb(). Reported-by: Andrew Murray Signed-off-by: Will Deacon --- arch/arm64/include/asm/io.h | 1 + 1 file changed, 1 insertion(+) -- 2.11.0 diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h index ee723835c1f4..8bb7210ac286 100644 --- a/arch/arm64/include/asm/io.h +++ b/arch/arm64/include/asm/io.h @@ -121,6 +121,7 @@ static inline u64 __raw_readq(const volatile void __iomem *addr) : "memory"); \ }) +#define __io_par(v) __iormb(v) #define __iowmb() wmb() #define mmiowb() do { } while (0)