From patchwork Mon Mar 2 06:47:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 11414803 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D63EF174A for ; Mon, 2 Mar 2020 06:48:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AB608246B6 for ; Mon, 2 Mar 2020 06:48:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725911AbgCBGsA (ORCPT ); Mon, 2 Mar 2020 01:48:00 -0500 Received: from foss.arm.com ([217.140.110.172]:56678 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726545AbgCBGsA (ORCPT ); Mon, 2 Mar 2020 01:48:00 -0500 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 D730AFEC; Sun, 1 Mar 2020 22:47:58 -0800 (PST) Received: from p8cg001049571a15.arm.com (unknown [10.163.1.119]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7EB443F6CF; Sun, 1 Mar 2020 22:51:45 -0800 (PST) From: Anshuman Khandual To: linux-mm@kvack.org Cc: Anshuman Khandual , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org, uclinux-h8-devel@lists.sourceforge.jp, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, nios2-dev@lists.rocketboards.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org Subject: [RFC 0/3] mm/vma: some new flags and helpers Date: Mon, 2 Mar 2020 12:17:43 +0530 Message-Id: <1583131666-15531-1-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org The motivation here is to consolidate VMA flag combinations commonly used across platforms and reduce code duplication while making it uncluttered in general. This first introduces a default VM_DATA_DEFAULT_FLAGS which platforms can easily fall back on without requiring to define any similar data flag combinations as they currently do. This also adds some more common data flag combinations which are generally used when the platforms decide to override the default. The second patch consolidates VM_READ, VM_WRITE, VM_EXEC as VM_ACCESS_FLAGS extending the existing VMA accessibility concept via vma_is_accessibility(). VM_ACCESS_FLAGS replaces many other instances which used check all three VMA access flags simultaneously. While here, this also adds some more special VMA flag based helpers which wraps around similar checks at various places thus improving readability. This series intentionally limits these new helpers which are applicable only for special purpose VM flags than the more common ones like VM_READ, VM_WRITE, VM_EXEC, VM_SHARED etc just to limit code churn. But if there is common agreement that every flag should have it's own wrapper here, we can do that as well. Otherwise if this patch seems really unnecessary with much code churn, will be happy to drop it. Reviews, comments, suggestions and concerns welcome. Thank you. This series is based on v5.6-r4 after applying these patches. 1. https://patchwork.kernel.org/cover/11399319/ 2. https://patchwork.kernel.org/patch/11399379/ This series is build tested across multiple architectures but boot tested only on arm64 and x86 platforms. Cc: linux-alpha@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-snps-arc@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: uclinux-h8-devel@lists.sourceforge.jp Cc: linux-hexagon@vger.kernel.org Cc: linux-ia64@vger.kernel.org Cc: linux-m68k@lists.linux-m68k.org Cc: linux-mips@vger.kernel.org Cc: nios2-dev@lists.rocketboards.org Cc: openrisc@lists.librecores.org Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-riscv@lists.infradead.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: linux-um@lists.infradead.org Cc: linux-xtensa@linux-xtensa.org Cc: linux-mm@kvack.org Anshuman Khandual (3): mm/vma: Define a default value for VM_DATA_DEFAULT_FLAGS mm/vma: Introduce VM_ACCESS_FLAGS mm/vma: Introduce some more VMA flag wrappers arch/alpha/include/asm/page.h | 3 -- arch/arc/include/asm/page.h | 2 +- arch/arm/include/asm/page.h | 4 +- arch/arm/mm/fault.c | 2 +- arch/arm64/include/asm/page.h | 4 +- arch/arm64/mm/fault.c | 2 +- arch/c6x/include/asm/page.h | 5 +-- arch/c6x/include/asm/processor.h | 2 +- arch/csky/include/asm/page.h | 3 -- arch/h8300/include/asm/page.h | 2 - arch/hexagon/include/asm/page.h | 3 +- arch/ia64/include/asm/page.h | 5 +-- arch/m68k/include/asm/page.h | 3 -- arch/microblaze/include/asm/page.h | 2 - arch/mips/include/asm/page.h | 5 +-- arch/nds32/include/asm/page.h | 3 -- arch/nds32/mm/fault.c | 2 +- arch/nios2/include/asm/page.h | 3 +- arch/nios2/include/asm/processor.h | 2 +- arch/openrisc/include/asm/page.h | 5 --- arch/parisc/include/asm/page.h | 3 -- arch/powerpc/include/asm/page.h | 9 +---- arch/powerpc/include/asm/page_64.h | 7 +--- arch/powerpc/mm/book3s64/pkeys.c | 2 +- arch/riscv/include/asm/page.h | 3 +- arch/s390/include/asm/page.h | 3 +- arch/s390/mm/fault.c | 2 +- arch/sh/include/asm/page.h | 3 -- arch/sh/include/asm/processor_64.h | 2 +- arch/sparc/include/asm/mman.h | 2 +- arch/sparc/include/asm/page_32.h | 3 -- arch/sparc/include/asm/page_64.h | 3 -- arch/unicore32/include/asm/page.h | 3 -- arch/unicore32/mm/fault.c | 2 +- arch/x86/include/asm/page_types.h | 4 +- arch/x86/mm/pkeys.c | 2 +- arch/x86/um/asm/vm-flags.h | 10 +---- arch/xtensa/include/asm/page.h | 3 -- drivers/staging/gasket/gasket_core.c | 2 +- fs/binfmt_elf.c | 2 +- fs/proc/task_mmu.c | 14 +++---- include/linux/huge_mm.h | 4 +- include/linux/mm.h | 58 +++++++++++++++++++++++++++- kernel/events/core.c | 2 +- kernel/events/uprobes.c | 2 +- mm/gup.c | 2 +- mm/huge_memory.c | 6 +-- mm/hugetlb.c | 4 +- mm/ksm.c | 8 ++-- mm/madvise.c | 4 +- mm/memory.c | 4 +- mm/migrate.c | 4 +- mm/mlock.c | 4 +- mm/mmap.c | 20 +++++----- mm/mprotect.c | 9 ++--- mm/mremap.c | 4 +- mm/msync.c | 3 +- mm/rmap.c | 6 +-- mm/shmem.c | 8 ++-- 59 files changed, 140 insertions(+), 158 deletions(-)