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| author | Mandeep Singh Baines <msb@chromium.org> | 2012-01-04 06:18:30 +0100 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2012-01-21 00:58:13 +0100 |
| commit | b78949ebfb563c29808a9d0a772e3adb5561bc80 (patch) | |
| tree | d5b473db418a7480d314ffe36d428290d3603bfc /scripts/Makefile.asm-generic | |
| parent | cgroup: move struct cgroup_pidlist out from the header file (diff) | |
| download | linux-b78949ebfb563c29808a9d0a772e3adb5561bc80.tar.xz linux-b78949ebfb563c29808a9d0a772e3adb5561bc80.zip | |
cgroup: simplify double-check locking in cgroup_attach_proc
To keep the complexity of the double-check locking in one place, move
the thread_group_leader check up into attach_task_by_pid(). This
allows us to use a goto instead of returning -EAGAIN.
While at it, convert a couple of returns to gotos and use rcu for the
!pid case also in order to simplify the logic.
Changes in V2:
* https://lkml.org/lkml/2011/12/22/86 (Tejun Heo)
* Use a goto instead of returning -EAGAIN
Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: containers@lists.linux-foundation.org
Cc: cgroups@vger.kernel.org
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Paul Menage <paul@paulmenage.org>
Diffstat (limited to 'scripts/Makefile.asm-generic')
0 files changed, 0 insertions, 0 deletions