tree a4965645000e9766f06ee7b5eb2bab098cde0f8c
parent bb9d97b6dffa10cec5e1ce9adbce60f3c2b5eabc
author Tejun Heo <tj@kernel.org> 1323742342 -0800
committer Tejun Heo <tj@kernel.org> 1323742342 -0800

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>