cgroup, cpuset: don't use ss->pre_attach()
authorTejun Heo <tj@kernel.org>
Tue, 13 Dec 2011 02:12:22 +0000 (18:12 -0800)
committerTejun Heo <tj@kernel.org>
Tue, 13 Dec 2011 02:12:22 +0000 (18:12 -0800)
commit94196f51c1ee5bbad674de28c682b17d78adb8e6
treea4965645000e9766f06ee7b5eb2bab098cde0f8c
parentbb9d97b6dffa10cec5e1ce9adbce60f3c2b5eabc
cgroup, cpuset: don't use ss->pre_attach()

->pre_attach() is supposed to be called before migration, which is
observed during process migration but task migration does it the other
way around.  The only ->pre_attach() user is cpuset which can do the
same operaitons in ->can_attach().  Collapse cpuset_pre_attach() into
cpuset_can_attach().

-v2: Patch contamination from later patch removed.  Spotted by Paul
     Menage.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Paul Menage <paul@paulmenage.org>
Cc: Li Zefan <lizf@cn.fujitsu.com>
kernel/cpuset.c