From: Andrew Morton <akpm@linux-foundation.org>
To: akpm@linux-foundation.org, alexander.h.duyck@linux.intel.com,
axboe@kernel.dk, bgeffon@google.com,
christian.brauner@ubuntu.com, dancol@google.com,
hannes@cmpxchg.org, jannh@google.com, joaodias@google.com,
joel@joelfernandes.org, ktkhai@virtuozzo.com,
linux-man@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com,
minchan@kernel.org, mm-commits@vger.kernel.org,
oleksandr@redhat.com, rientjes@google.com, shakeelb@google.com,
sj38.park@gmail.com, sjpark@amazon.de, sonnyrao@google.com,
sspatil@google.com, surenb@google.com, timmurray@google.com,
torvalds@linux-foundation.org, vbabka@suse.cz
Subject: [patch 16/39] pid: move pidfd_get_pid() to pid.c
Date: Fri, 14 Aug 2020 17:30:54 -0700 [thread overview]
Message-ID: <20200815003054.OgBLpWc6x%akpm@linux-foundation.org> (raw)
In-Reply-To: <20200814172939.55d6d80b6e21e4241f1ee1f3@linux-foundation.org>
From: Minchan Kim <minchan@kernel.org>
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 <minchan@kernel.org>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Suggested-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Reviewed-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jann Horn <jannh@google.com>
Cc: Brian Geffon <bgeffon@google.com>
Cc: Daniel Colascione <dancol@google.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: John Dias <joaodias@google.com>
Cc: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oleksandr Natalenko <oleksandr@redhat.com>
Cc: Sandeep Patil <sspatil@google.com>
Cc: SeongJae Park <sj38.park@gmail.com>
Cc: SeongJae Park <sjpark@amazon.de>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Sonny Rao <sonnyrao@google.com>
Cc: Tim Murray <timmurray@google.com>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: <linux-man@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
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
@@ -1474,23 +1474,6 @@ 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
@@ -519,6 +519,23 @@ 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.
*
_
next prev parent reply other threads:[~2020-08-15 0:30 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-15 0:29 incoming Andrew Morton
2020-08-15 0:30 ` [patch 01/39] asm-generic: pgalloc.h: use correct #ifdef to enable pud_alloc_one() Andrew Morton
2020-08-15 0:30 ` [patch 02/39] Revert "mm/vmstat.c: do not show lowmem reserve protection information of empty zone" Andrew Morton
2020-08-15 0:30 ` [patch 03/39] lz4: fix kernel decompression speed Andrew Morton
2020-08-15 0:30 ` [patch 04/39] exec: restore EACCES of S_ISDIR execve() Andrew Morton
2020-08-15 0:30 ` [patch 05/39] selftests/exec: add file type errno tests Andrew Morton
2020-08-15 0:30 ` [patch 06/39] mailmap: add entry for Greg Kurz Andrew Morton
2020-08-15 0:30 ` [patch 07/39] mm: store compound_nr as well as compound_order Andrew Morton
2020-08-15 0:30 ` [patch 08/39] mm: move page-flags include to top of file Andrew Morton
2020-08-15 0:30 ` [patch 09/39] mm: add thp_order Andrew Morton
2020-08-15 0:30 ` [patch 10/39] mm: add thp_size Andrew Morton
2020-08-15 0:30 ` [patch 11/39] mm: replace hpage_nr_pages with thp_nr_pages Andrew Morton
2020-08-15 0:30 ` [patch 12/39] mm: add thp_head Andrew Morton
2020-08-15 0:30 ` [patch 13/39] mm: introduce offset_in_thp Andrew Morton
2020-08-15 0:30 ` [patch 14/39] fs: autofs: delete repeated words in comments Andrew Morton
2020-08-15 0:30 ` [patch 15/39] mm/madvise: pass task and mm to do_madvise Andrew Morton
2020-08-15 0:30 ` Andrew Morton [this message]
2020-08-15 0:30 ` [patch 17/39] mm/madvise: introduce process_madvise() syscall: an external memory hinting API Andrew Morton
2020-08-16 8:12 ` Christian Brauner
2020-08-17 15:10 ` Minchan Kim
2020-08-15 0:31 ` [patch 18/39] mm/madvise: check fatal signal pending of target process Andrew Morton
2020-08-15 2:53 ` Linus Torvalds
2020-08-15 4:59 ` Minchan Kim
2020-08-15 14:57 ` Linus Torvalds
2020-08-15 18:34 ` Minchan Kim
2020-08-16 1:43 ` Linus Torvalds
2020-08-16 5:58 ` Minchan Kim
2020-08-15 0:31 ` [patch 19/39] all arch: remove system call sys_sysctl Andrew Morton
2020-08-15 0:31 ` [patch 20/39] mm/kmemleak: silence KCSAN splats in checksum Andrew Morton
2020-08-15 0:31 ` [patch 21/39] mm/frontswap: mark various intentional data races Andrew Morton
2020-08-15 0:31 ` [patch 22/39] mm/page_io: " Andrew Morton
2020-08-15 0:31 ` [patch 23/39] mm/swap_state: " Andrew Morton
2020-08-15 0:31 ` [patch 24/39] mm/filemap.c: fix a data race in filemap_fault() Andrew Morton
2020-08-15 0:31 ` [patch 25/39] mm/swapfile: fix and annotate various data races Andrew Morton
2020-08-15 0:31 ` [patch 26/39] mm/page_counter: fix various data races at memsw Andrew Morton
2020-08-15 0:31 ` [patch 27/39] mm/memcontrol: fix a data race in scan count Andrew Morton
2020-08-15 0:31 ` [patch 28/39] mm/list_lru: fix a data race in list_lru_count_one Andrew Morton
2020-08-15 0:31 ` [patch 29/39] mm/mempool: fix a data race in mempool_free() Andrew Morton
2020-08-15 0:31 ` [patch 30/39] mm/rmap: annotate a data race at tlb_flush_batched Andrew Morton
2020-08-15 0:31 ` [patch 31/39] mm/swap.c: annotate data races for lru_rotate_pvecs Andrew Morton
2020-08-15 0:31 ` [patch 32/39] mm: annotate a data race in page_zonenum() Andrew Morton
2020-08-15 0:31 ` [patch 33/39] include/asm-generic/vmlinux.lds.h: align ro_after_init Andrew Morton
2020-08-15 0:32 ` [patch 34/39] sh: clkfwk: remove r8/r16/r32 Andrew Morton
2020-08-15 0:32 ` [patch 35/39] sh: use generic strncpy() Andrew Morton
2020-08-15 0:32 ` [patch 36/39] iomap: constify ioreadX() iomem argument (as in generic implementation) Andrew Morton
2020-08-15 0:32 ` [patch 37/39] rtl818x: " Andrew Morton
2020-08-15 0:32 ` [patch 38/39] ntb: intel: " Andrew Morton
2020-08-15 0:32 ` [patch 39/39] virtio: pci: " Andrew Morton
2020-08-19 23:09 ` mmotm 2020-08-19-16-09 uploaded Andrew Morton
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