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=-14.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, 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 1E01CC47080 for ; Tue, 1 Jun 2021 23:22:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F1628613AD for ; Tue, 1 Jun 2021 23:22:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235165AbhFAXYS (ORCPT ); Tue, 1 Jun 2021 19:24:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:46280 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234766AbhFAXYR (ORCPT ); Tue, 1 Jun 2021 19:24:17 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id F246461026; Tue, 1 Jun 2021 23:22:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622589755; bh=Se0vr8HjjuDI8G7XYVGiPoR/r6XQrsDheJYzxnwLFiA=; h=From:To:Cc:Subject:Date:From; b=lm5J/tOLNt1E6CBn8MvYDvNyPnF6vnpKrF7mLRGMR5DjINnhiOWID2oaRBxMdKnoH hfVeg5z9RDRwYGuaZUiXAZxKlqk3czXqV04hFTUpW6U6gyZhMmCKwTCPmP2KQB/HaH myQ5Z1TP0piPwxBlAxRiyKo5HStdz7iaRo6VR2PBwY0bviyRM2q0ki9sxrBbAugpdJ Lu6S5WPGpbXfpBGdwtc+TYkOpQVMKGF/5BrflodcqhDYa0bwkmhotrE1kyNpK24S2B gdeN7evdS/69FUK0IcZ6xrmC6+OAKeJpshrNiTkwZk1eY7zwK/gSVuIlLar72jrrds 7xEhG4SwjOCuw== From: Ming Lin To: Linus Torvalds , Hugh Dickins , Simon Ser Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Ming Lin Subject: [PATCH 0/2] mm: adds MAP_NOSIGBUS extension for shmem read Date: Tue, 1 Jun 2021 16:22:31 -0700 Message-Id: <1622589753-9206-1-git-send-email-mlin@kernel.org> X-Mailer: git-send-email 1.8.3.1 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org These 2 patches are based on the discussion of "Sealed memfd & no-fault mmap" at https://bit.ly/3pdwOGR patch 1: make "vm_flags" be an u64, so we can have enough bits on 32-bit architectures. Then we can add VM_NOSIGBUS which is bit 38. patch 2: support no-fault mmap for shmem read Ming Lin (2): mm: make "vm_flags" be an u64 mm: adds NOSIGBUS extension for out-of-band shmem read arch/arm64/Kconfig | 1 - arch/powerpc/Kconfig | 1 - arch/x86/Kconfig | 1 - include/linux/mm.h | 102 ++++++++++++++++----------------- include/linux/mm_types.h | 4 +- include/linux/mman.h | 5 +- include/uapi/asm-generic/mman-common.h | 1 + mm/Kconfig | 2 - mm/memory.c | 2 +- mm/mmap.c | 5 +- mm/shmem.c | 17 +++++- 11 files changed, 76 insertions(+), 65 deletions(-) -- 1.8.3.1