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=-4.0 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,URIBL_BLOCKED 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 15AC8C433E0 for ; Wed, 24 Jun 2020 22:37:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E49B820857 for ; Wed, 24 Jun 2020 22:37:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593038227; bh=weB4RF82cTJ24KBZkPvsN6R/mqzZksRmhlUijtYwo/o=; h=Date:From:To:Subject:List-ID:From; b=zPIyoVZQbPAW2MDGo8ljsX0NPP8LQ1GgcW5XXbbAnWwSB3zV/BZ/dfT1/QFlfkpGA cU2LsbukQ0LuJiIFzQ6HG5JdZaeET9gQepCk8K/tCnPxHLKQWmcW8ChKRYK+aiCYm2 yOqN2DDBgvDbF5oi5t9hFB7tdxq7cbmH/M1sQp9Q= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388739AbgFXWhH (ORCPT ); Wed, 24 Jun 2020 18:37:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:37992 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732772AbgFXWhH (ORCPT ); Wed, 24 Jun 2020 18:37:07 -0400 Received: from X1 (nat-ab2241.sltdut.senawave.net [162.218.216.4]) (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 BFCC220768; Wed, 24 Jun 2020 22:37:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593038226; bh=weB4RF82cTJ24KBZkPvsN6R/mqzZksRmhlUijtYwo/o=; h=Date:From:To:Subject:From; b=nTomen1cqoXYzdx0w/CARsi6lqftUYat5Y/xMufprEm0I+KLKWT28o5GkpYviMLYZ ak8c/XUWjRsmzDv6qbGxWGU7NXRnl24YGJOkIy1/rEQ5Lum94w9t6zQW0EJKMWe3Ns 7r2ptj/WjHed2jT2JSLxKoti1+6dYV7rdaLT1lJY= Date: Wed, 24 Jun 2020 15:37:05 -0700 From: akpm@linux-foundation.org To: mm-commits@vger.kernel.org, vbabka@suse.cz, timmurray@google.com, surenb@google.com, sspatil@google.com, sonnyrao@google.com, sjpark@amazon.de, sj38.park@gmail.com, shakeelb@google.com, rientjes@google.com, oleksandr@redhat.com, mhocko@suse.com, linux-man@vger.kernel.org, ktkhai@virtuozzo.com, joel@joelfernandes.org, joaodias@google.com, jannh@google.com, hannes@cmpxchg.org, dancol@google.com, christian.brauner@ubuntu.com, bgeffon@google.com, axboe@kernel.dk, alexander.h.duyck@linux.intel.com, minchan@kernel.org Subject: + pid-move-pidfd_get_pid-to-pidc.patch added to -mm tree Message-ID: <20200624223705.kl7cu%akpm@linux-foundation.org> User-Agent: s-nail v14.9.10 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-to-pidc.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/pid-move-pidfd_get_pid-to-pidc.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/pid-move-pidfd_get_pid-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 Link: http://lkml.kernel.org/r/20200622192900.22757-3-minchan@kernel.org Signed-off-by: Minchan Kim Reviewed-by: Suren Baghdasaryan Suggested-by: Alexander Duyck Reviewed-by: Alexander Duyck Acked-by: Christian Brauner Reviewed-by: Vlastimil Babka Acked-by: David Rientjes Cc: Jens Axboe Cc: Jann Horn Cc: Brian Geffon 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: Christian Brauner 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-to-pidc +++ a/include/linux/pid.h @@ -77,6 +77,7 @@ 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-to-pidc +++ a/kernel/exit.c @@ -1475,23 +1475,6 @@ 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-to-pidc +++ a/kernel/pid.c @@ -518,6 +518,23 @@ 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-madvise-pass-task-and-mm-to-do_madvise.patch pid-move-pidfd_get_pid-to-pidc.patch mm-madvise-introduce-process_madvise-syscall-an-external-memory-hinting-api.patch mm-madvise-check-fatal-signal-pending-of-target-process.patch