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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, 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 CD526C2D0CE for ; Sat, 28 Dec 2019 19:21:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A95D421927 for ; Sat, 28 Dec 2019 19:21:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="CaJwWqzg" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726362AbfL1TV3 (ORCPT ); Sat, 28 Dec 2019 14:21:29 -0500 Received: from mail-pg1-f196.google.com ([209.85.215.196]:46406 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726391AbfL1TV3 (ORCPT ); Sat, 28 Dec 2019 14:21:29 -0500 Received: by mail-pg1-f196.google.com with SMTP id z124so16072436pgb.13 for ; Sat, 28 Dec 2019 11:21:29 -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=OCDlzjKBtNA5nDEjW7SKlUxJxiS4FORDY5crjxo8fOo=; b=CaJwWqzgWaaIsjrgD7aASGjBz2Ik0LOBvA7LxkLCejZe9exQo3Itf8zEpxvg0POm+g 03PcdNqyd05JD/pOW3YkrVufA9yX8+VwN3ao9RvmEIXF+88zSHiKKdBCBQx1NaJfOhpl 4lRMcv7WF1VIr0uB+unnT6YoeAqlv9LAn4jpN4kD0chvias0oYAPFyIRw76EJn9XRDbE nrsRWUC9TAOor9PNvjt4K/tmrxsL8cabCpoR5EEK3vH52f1dC8DAbvTSoL4B7r0o8qu2 Ke9hVsje9jnBV1VDsex7HHFmXAhbkExgwVkwJ4TK58WVTdgocE9GY6MkcWVjJFEj0WDW n4xw== 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=OCDlzjKBtNA5nDEjW7SKlUxJxiS4FORDY5crjxo8fOo=; b=XfBU8OCgui1A8W/n/dBoz8VVb02LN+Qs6ZiXtYZrIcQ44pPmuSfz373plyjYmpU9B8 OnuYhrBQ+Gq44sm5Ehf9C9zql26D/ik+3xFBRV9xHnELzmIaoV7ndQUDoX2cS+av+bi7 UEJtEOELG7+2/F6sHWWqTneCcXP+c2T0eJHo6udqz+GF+UDxv2F8yc4hHowd+CknroW8 NE+AqOmYycWM98OQezj4QhZ5HdG/BQAnyikDHOGrPGgBCGDCP/ZR8+NH+lF7SNdtLD0j DzREi+LX2LgiLN1JfhDEBwqp2NnwhFb4iSN5PhzodoNEDXscTymb3tucj5P0jhL5bQDi PDbw== X-Gm-Message-State: APjAAAVoviwfieZDe2PcimRidqdMSaAoXH55sDsKaZuSaQvyUXgEP9FY hCs/awgv0QTWgxWhlKyclQFS+zNVhiBRXQ== X-Google-Smtp-Source: APXvYqyKSf1p9u8SIYXruqa1PZoR4ynTGaoDZfR9y9og8uVMz5Q3zveIQ0txSE0cJyhoTV614zFZQg== X-Received: by 2002:a63:710:: with SMTP id 16mr23567613pgh.58.1577560888254; Sat, 28 Dec 2019 11:21:28 -0800 (PST) Received: from x1.localdomain ([66.219.217.145]) by smtp.gmail.com with ESMTPSA id z30sm47067902pfq.154.2019.12.28.11.21.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Dec 2019 11:21:27 -0800 (PST) From: Jens Axboe To: io-uring@vger.kernel.org Cc: Jens Axboe Subject: [PATCH 8/9] mm: make do_madvise() available internally Date: Sat, 28 Dec 2019 12:21:17 -0700 Message-Id: <20191228192118.4005-9-axboe@kernel.dk> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191228192118.4005-1-axboe@kernel.dk> References: <20191228192118.4005-1-axboe@kernel.dk> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: io-uring-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org 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 c97ea3b694e6..3eb156c3f016 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); 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, behavior) +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) return error; } + +SYSCALL_DEFINE3(madvise, unsigned long, start, size_t, len_in, int, behavior) +{ + return do_madvise(start, len_in, behavior); +} -- 2.24.1