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=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=no 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 3A982C3F2D7 for ; Mon, 2 Mar 2020 21:16:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0E64622B48 for ; Mon, 2 Mar 2020 21:16:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583183803; bh=zY0TwOtEYxUWvkWB2GMark8DrkdDaAiB+/Al90YnRkM=; h=Date:From:To:Subject:List-ID:From; b=Yz9ebeDqi7OKZyEG6EL9dvu1vynASDjx7SOOQAYlysw9ToIvKiBO1m5OkJOuKLzmR SNHqDxcioR+ANTGxnQK6d6/Xm02xX/+Bfa7Ai3a0ROZaO0UMgyr/cN55SXg5+yIVlB 2N5pJvsJZRNQsYZrFYAGPZkTm9pbXAFpAWchFE48= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726859AbgCBVQm (ORCPT ); Mon, 2 Mar 2020 16:16:42 -0500 Received: from mail.kernel.org ([198.145.29.99]:52528 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726536AbgCBVQm (ORCPT ); Mon, 2 Mar 2020 16:16:42 -0500 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2E3832465E; Mon, 2 Mar 2020 21:16:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583183801; bh=zY0TwOtEYxUWvkWB2GMark8DrkdDaAiB+/Al90YnRkM=; h=Date:From:To:Subject:From; b=qeVOKP4mj4i2L5tD+zINayPuBX78UaHsFShwrLv3TvAbIkH2g0zfuRQ1G7KoMnKUv zIQj91jG7F9Kf2TarXSenm+5IurTEua6z0f/swxQJyAniqfGk3/yvl7AAdL/Uifpp7 N2VF40DDPt97G+4YWSRoPThQ65KmIA1EN6sOAjz0= Date: Mon, 02 Mar 2020 13:16:40 -0800 From: akpm@linux-foundation.org To: alexander.h.duyck@linux.intel.com, axboe@kernel.dk, bgeffon@google.com, christian@brauner.io, dancol@google.com, hannes@cmpxchg.org, jannh@google.com, joaodias@google.com, joel@joelfernandes.org, ktkhai@virtuozzo.com, linux-man@vger.kernel.org, mhocko@suse.com, minchan@kernel.org, mm-commits@vger.kernel.org, oleksandr@redhat.com, shakeelb@google.com, sj38.park@gmail.com, sjpark@amazon.de, sonnyrao@google.com, sspatil@google.com, surenb@google.com, timmurray@google.com Subject: + pid-move-pidfd_get_pid-function-to-pidc.patch added to -mm tree Message-ID: <20200302211640.QH6XjiUbx%akpm@linux-foundation.org> User-Agent: s-nail v14.8.16 Sender: linux-man-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org The patch titled Subject: pid: move pidfd_get_pid() to pid.c has been added to the -mm tree. Its filename is pid-move-pidfd_get_pid-function-to-pidc.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/pid-move-pidfd_get_pid-function-to-pidc.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/pid-move-pidfd_get_pid-function-to-pidc.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Minchan Kim Subject: pid: move pidfd_get_pid() to pid.c process_madvise syscall needs pidfd_get_pid function to translate pidfd to pid so this patch move the function to kernel/pid.c. Link: http://lkml.kernel.org/r/20200302193630.68771-5-minchan@kernel.org Signed-off-by: Minchan Kim Reviewed-by: Suren Baghdasaryan Suggested-by: Alexander Duyck Reviewed-by: Alexander Duyck Cc: Jens Axboe Cc: Jann Horn Cc: Brian Geffon Cc: Christian Brauner Cc: Daniel Colascione Cc: Joel Fernandes Cc: Johannes Weiner Cc: John Dias Cc: Kirill Tkhai Cc: Michal Hocko Cc: Oleksandr Natalenko Cc: Sandeep Patil Cc: SeongJae Park Cc: SeongJae Park Cc: Shakeel Butt Cc: Sonny Rao Cc: Tim Murray Cc: Signed-off-by: Andrew Morton --- include/linux/pid.h | 1 + kernel/exit.c | 17 ----------------- kernel/pid.c | 17 +++++++++++++++++ 3 files changed, 18 insertions(+), 17 deletions(-) --- a/include/linux/pid.h~pid-move-pidfd_get_pid-function-to-pidc +++ a/include/linux/pid.h @@ -75,6 +75,7 @@ extern const struct file_operations pidf struct file; extern struct pid *pidfd_pid(const struct file *file); +struct pid *pidfd_get_pid(unsigned int fd); static inline struct pid *get_pid(struct pid *pid) { --- a/kernel/exit.c~pid-move-pidfd_get_pid-function-to-pidc +++ a/kernel/exit.c @@ -1470,23 +1470,6 @@ end: return retval; } -static struct pid *pidfd_get_pid(unsigned int fd) -{ - struct fd f; - struct pid *pid; - - f = fdget(fd); - if (!f.file) - return ERR_PTR(-EBADF); - - pid = pidfd_pid(f.file); - if (!IS_ERR(pid)) - get_pid(pid); - - fdput(f); - return pid; -} - static long kernel_waitid(int which, pid_t upid, struct waitid_info *infop, int options, struct rusage *ru) { --- a/kernel/pid.c~pid-move-pidfd_get_pid-function-to-pidc +++ a/kernel/pid.c @@ -496,6 +496,23 @@ struct pid *find_ge_pid(int nr, struct p return idr_get_next(&ns->idr, &nr); } +struct pid *pidfd_get_pid(unsigned int fd) +{ + struct fd f; + struct pid *pid; + + f = fdget(fd); + if (!f.file) + return ERR_PTR(-EBADF); + + pid = pidfd_pid(f.file); + if (!IS_ERR(pid)) + get_pid(pid); + + fdput(f); + return pid; +} + /** * pidfd_create() - Create a new pid file descriptor. * _ Patches currently in -mm which might be from minchan@kernel.org are mm-pass-task-and-mm-to-do_madvise.patch mm-introduce-external-memory-hinting-api.patch mm-check-fatal-signal-pending-of-target-process.patch pid-move-pidfd_get_pid-function-to-pidc.patch mm-support-both-pid-and-pidfd-for-process_madvise.patch