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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 50472C433F5 for ; Thu, 7 Apr 2022 10:41:53 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KYycH5wbdz3fPY for ; Thu, 7 Apr 2022 20:41:51 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=arm.com (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=anshuman.khandual@arm.com; receiver=) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lists.ozlabs.org (Postfix) with ESMTP id 4KYyQM1m2mz3brW for ; Thu, 7 Apr 2022 20:33:14 +1000 (AEST) 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 A5235139F; Thu, 7 Apr 2022 03:32:43 -0700 (PDT) Received: from a077893.arm.com (unknown [10.163.36.112]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 584043F5A1; Thu, 7 Apr 2022 03:32:38 -0700 (PDT) From: Anshuman Khandual To: linux-mm@kvack.org, akpm@linux-foundation.org Subject: [PATCH V4 1/7] mm/mmap: Add new config ARCH_HAS_VM_GET_PAGE_PROT Date: Thu, 7 Apr 2022 16:02:45 +0530 Message-Id: <20220407103251.1209606-2-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220407103251.1209606-1-anshuman.khandual@arm.com> References: <20220407103251.1209606-1-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, Anshuman Khandual , linux-kernel@vger.kernel.org, Christoph Hellwig , sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add a new config ARCH_HAS_VM_GET_PAGE_PROT, which when subscribed enables a given platform to define its own vm_get_page_prot() but still utilizing the generic protection_map[] array. Cc: Andrew Morton Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org Suggested-by: Christoph Hellwig Signed-off-by: Anshuman Khandual --- mm/Kconfig | 3 +++ mm/mmap.c | 2 ++ 2 files changed, 5 insertions(+) diff --git a/mm/Kconfig b/mm/Kconfig index 034d87953600..b1f7624276f8 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -765,6 +765,9 @@ config ARCH_HAS_CURRENT_STACK_POINTER config ARCH_HAS_FILTER_PGPROT bool +config ARCH_HAS_VM_GET_PAGE_PROT + bool + config ARCH_HAS_PTE_DEVMAP bool diff --git a/mm/mmap.c b/mm/mmap.c index 3aa839f81e63..87cb2eaf7e1a 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -106,6 +106,7 @@ pgprot_t protection_map[16] __ro_after_init = { __S000, __S001, __S010, __S011, __S100, __S101, __S110, __S111 }; +#ifndef CONFIG_ARCH_HAS_VM_GET_PAGE_PROT #ifndef CONFIG_ARCH_HAS_FILTER_PGPROT static inline pgprot_t arch_filter_pgprot(pgprot_t prot) { @@ -122,6 +123,7 @@ pgprot_t vm_get_page_prot(unsigned long vm_flags) return arch_filter_pgprot(ret); } EXPORT_SYMBOL(vm_get_page_prot); +#endif /* CONFIG_ARCH_HAS_VM_GET_PAGE_PROT */ static pgprot_t vm_pgprot_modify(pgprot_t oldprot, unsigned long vm_flags) { -- 2.25.1