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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, 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 0B349C43381 for ; Thu, 21 Mar 2019 16:36:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CF88F218E2 for ; Thu, 21 Mar 2019 16:36:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728675AbfCUQg4 (ORCPT ); Thu, 21 Mar 2019 12:36:56 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:59398 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728653AbfCUQgw (ORCPT ); Thu, 21 Mar 2019 12:36:52 -0400 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 C1893165C; Thu, 21 Mar 2019 09:36:51 -0700 (PDT) Received: from e108454-lin.cambridge.arm.com (e108454-lin.cambridge.arm.com [10.1.196.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D1BD23F614; Thu, 21 Mar 2019 09:36:49 -0700 (PDT) From: Julien Grall To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Cc: christoffer.dall@arm.com, james.morse@arm.com, marc.zyngier@arm.com, julien.thierry@arm.com, suzuki.poulose@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, Julien Grall Subject: [PATCH RFC 05/14] arm64/mm: Remove dependency on MM in new_context Date: Thu, 21 Mar 2019 16:36:14 +0000 Message-Id: <20190321163623.20219-6-julien.grall@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190321163623.20219-1-julien.grall@arm.com> References: <20190321163623.20219-1-julien.grall@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The function new_context will be part of a generic ASID allocator. At the moment, the MM structure is only used to fetch the ASID. To remove the dependency on MM, it is possible to just pass a pointer to the current ASID. Signed-off-by: Julien Grall --- arch/arm64/mm/context.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c index e98ab348b9cb..488845c39c39 100644 --- a/arch/arm64/mm/context.c +++ b/arch/arm64/mm/context.c @@ -151,10 +151,10 @@ static bool check_update_reserved_asid(struct asid_info *info, u64 asid, return hit; } -static u64 new_context(struct asid_info *info, struct mm_struct *mm) +static u64 new_context(struct asid_info *info, atomic64_t *pasid) { static u32 cur_idx = 1; - u64 asid = atomic64_read(&mm->context.id); + u64 asid = atomic64_read(pasid); u64 generation = atomic64_read(&info->generation); if (asid != 0) { @@ -236,7 +236,7 @@ void check_and_switch_context(struct mm_struct *mm, unsigned int cpu) /* Check that our ASID belongs to the current generation. */ asid = atomic64_read(&mm->context.id); if ((asid ^ atomic64_read(&info->generation)) >> info->bits) { - asid = new_context(info, mm); + asid = new_context(info, &mm->context.id); atomic64_set(&mm->context.id, asid); } -- 2.11.0