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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 AF4B2C282DD for ; Fri, 10 Jan 2020 15:47:48 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 61FC920721 for ; Fri, 10 Jan 2020 15:47:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="qOl9QFBl" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 61FC920721 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 848F48E0008; Fri, 10 Jan 2020 10:47:46 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 77FC38E0001; Fri, 10 Jan 2020 10:47:46 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 649558E0008; Fri, 10 Jan 2020 10:47:46 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0109.hostedemail.com [216.40.44.109]) by kanga.kvack.org (Postfix) with ESMTP id 4517E8E0001 for ; Fri, 10 Jan 2020 10:47:46 -0500 (EST) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with SMTP id F15AD4DD3 for ; Fri, 10 Jan 2020 15:47:45 +0000 (UTC) X-FDA: 76362154932.15.stove20_26a43fec96f16 X-HE-Tag: stove20_26a43fec96f16 X-Filterd-Recvd-Size: 4610 Received: from mail-pf1-f196.google.com (mail-pf1-f196.google.com [209.85.210.196]) by imf23.hostedemail.com (Postfix) with ESMTP for ; Fri, 10 Jan 2020 15:47:45 +0000 (UTC) Received: by mail-pf1-f196.google.com with SMTP id i23so1330929pfo.2 for ; Fri, 10 Jan 2020 07:47:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=KAg7QIm8jImHikUoSOMs5glP8O4K1H+Tjxl6C2b09Qs=; b=qOl9QFBlcZiHxiGK52h4/8M3/n2zocyp5aOgkMhgQcAOyq9f9KQsI+A7NOTym4c2SX uL7JxRaIckN5V3bACPRAFezd9Cl87tnT/gviSWBRkZpUa3NfnG/Cg8eAxuoeIZaqFzsQ YT626P69FUp1SeXP+fOrYiZI+YqREpnEyOkfdrRz27p6Hq5Y4Z801IQqDD4mY+yV4Vo1 UprGmZAf+XwvRsR61/J/GDr3cK+ezDYJ6O5FhvH2tE7N1HnGsYcRdzRlV9tvR6eE4zDG Qw1N9mz0P98CP0sx/UJfR5mYYNcfKssVkTwATm4bMeJfXMgwtEQmnoQO0ToQRZLt4QzS TGDQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=KAg7QIm8jImHikUoSOMs5glP8O4K1H+Tjxl6C2b09Qs=; b=Iw+7Uge4oP0XWQqZIaHnG3sxYxGy9V9ZYI3e0j38AyYjV44BMovaUbDiwfFq7/UsRv oeUZ0owC5WpN6n9+WBBeFnKUOzBRZhxlS3FK7+bUSlo+FRa2Ynrec550D4jUH9U3z9mq l22w6Px38XYlOyraMBRiFzU0SaOMUj/u1JCyRUouq5hRQh8lf192cUBKgZ2LY8VHQExD moYoaywUl2zJ4yrYaKMWgyQ4QgTEgk+2p+00CzhjC5amHHmnDTojgoVh/1au/gRRXzvM CfnPkhN/EQGfnCssRDy0+wQqoeH7qSEnvFM+P8+itvOpUTymeAqUNTCYFqulNFqnJH6i cs7w== X-Gm-Message-State: APjAAAXHOARyEf7jUHjeS0+olEJ55mNxZckaEQTl99lH5VpEqcsb2y+K +ebokVyDxdrWc5+y1YHZ4yPNyQ== X-Google-Smtp-Source: APXvYqwoxEzA6d9ySBwwZb72IUvmAA51OESb6WnmFufqREvnNTQk2wRRkJwqjLvXMMAkB/+D11ZgOg== X-Received: by 2002:a63:5442:: with SMTP id e2mr5034197pgm.18.1578671264202; Fri, 10 Jan 2020 07:47:44 -0800 (PST) Received: from x1.localdomain ([66.219.217.145]) by smtp.gmail.com with ESMTPSA id 3sm3489520pfi.13.2020.01.10.07.47.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Jan 2020 07:47:43 -0800 (PST) From: Jens Axboe To: io-uring@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Jens Axboe Subject: [PATCH 2/3] mm: make do_madvise() available internally Date: Fri, 10 Jan 2020 08:47:38 -0700 Message-Id: <20200110154739.2119-3-axboe@kernel.dk> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200110154739.2119-1-axboe@kernel.dk> References: <20200110154739.2119-1-axboe@kernel.dk> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This is in preparation for enabling this functionality through io_uring. Add a helper that is just exporting what sys_madvise() does, and have the system call use it. No functional changes in this patch. Signed-off-by: Jens Axboe --- include/linux/mm.h | 1 + mm/madvise.c | 7 ++++++- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 80a9162b406c..766cad8aaa60 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2328,6 +2328,7 @@ extern int __do_munmap(struct mm_struct *, unsigned= long, size_t, struct list_head *uf, bool downgrade); extern int do_munmap(struct mm_struct *, unsigned long, size_t, struct list_head *uf); +extern int do_madvise(unsigned long start, size_t len_in, int behavior); =20 static inline unsigned long do_mmap_pgoff(struct file *file, unsigned long addr, diff --git a/mm/madvise.c b/mm/madvise.c index bcdb6a042787..43b47d3fae02 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -1044,7 +1044,7 @@ madvise_behavior_valid(int behavior) * -EBADF - map exists, but area maps something that isn't a file. * -EAGAIN - a kernel resource was temporarily unavailable. */ -SYSCALL_DEFINE3(madvise, unsigned long, start, size_t, len_in, int, beha= vior) +int do_madvise(unsigned long start, size_t len_in, int behavior) { unsigned long end, tmp; struct vm_area_struct *vma, *prev; @@ -1141,3 +1141,8 @@ SYSCALL_DEFINE3(madvise, unsigned long, start, size= _t, len_in, int, behavior) =20 return error; } + +SYSCALL_DEFINE3(madvise, unsigned long, start, size_t, len_in, int, beha= vior) +{ + return do_madvise(start, len_in, behavior); +} --=20 2.24.1