From mboxrd@z Thu Jan 1 00:00:00 1970 From: akpm@linux-foundation.org Subject: + pid-move-pidfd_get_pid-function-to-pidc.patch added to -mm tree Date: Mon, 02 Mar 2020 13:16:40 -0800 Message-ID: <20200302211640.QH6XjiUbx%akpm__42219.7036373959$1583183827$gmane$org@linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Return-path: 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 Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.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 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