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=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 CD522C4321B for ; Tue, 11 Jun 2019 09:38:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A8D61212F5 for ; Tue, 11 Jun 2019 09:38:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404977AbfFKJi3 (ORCPT ); Tue, 11 Jun 2019 05:38:29 -0400 Received: from foss.arm.com ([217.140.110.172]:56324 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404959AbfFKJiZ (ORCPT ); Tue, 11 Jun 2019 05:38:25 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E8175C0A; Tue, 11 Jun 2019 02:38:24 -0700 (PDT) Received: from e112298-lin.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 54EFD3F73C; Tue, 11 Jun 2019 02:38:23 -0700 (PDT) From: Julien Thierry To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, rostedt@goodmis.org, marc.zyngier@arm.com, yuzenghui@huawei.com, wanghaibin.wang@huawei.com, james.morse@arm.com, will.deacon@arm.com, catalin.marinas@arm.com, mark.rutland@arm.com, liwei391@huawei.com, Julien Thierry Subject: [PATCH v4 2/8] arm64: irqflags: Pass flags as readonly operand to restore instruction Date: Tue, 11 Jun 2019 10:38:07 +0100 Message-Id: <1560245893-46998-3-git-send-email-julien.thierry@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1560245893-46998-1-git-send-email-julien.thierry@arm.com> References: <1560245893-46998-1-git-send-email-julien.thierry@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Flags are only read by the instructions doing the irqflags restore operation. Pass the operand as read only to the asm inline instead of read-write. Signed-off-by: Julien Thierry Cc: Catalin Marinas Cc: Will Deacon --- arch/arm64/include/asm/irqflags.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/irqflags.h b/arch/arm64/include/asm/irqflags.h index 62996318..9c93152 100644 --- a/arch/arm64/include/asm/irqflags.h +++ b/arch/arm64/include/asm/irqflags.h @@ -119,8 +119,8 @@ static inline void arch_local_irq_restore(unsigned long flags) __msr_s(SYS_ICC_PMR_EL1, "%0") "dsb sy", ARM64_HAS_IRQ_PRIO_MASKING) - : "+r" (flags) : + : "r" (flags) : "memory"); } -- 1.9.1