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cgroup: drop @skip_css from cgroup_taskset_for_each()

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If !NULL, @skip_css makes cgroup_taskset_for_each() skip the matching
css.  The intention of the interface is to make it easy to skip css's
(cgroup_subsys_states) which already match the migration target;
however, this is entirely unnecessary as migration taskset doesn't
include tasks which are already in the target cgroup.  Drop @skip_css
from cgroup_taskset_for_each().

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
This commit is contained in:
Tejun Heo 2014-02-13 06:58:41 -05:00
parent cb0f1fe9ba
commit 924f0d9a20
8 changed files with 11 additions and 15 deletions
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8
include/linux/cgroup.h
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@ -535,15 +535,11 @@ int cgroup_taskset_size(struct cgroup_taskset *tset);
/**
* cgroup_taskset_for_each - iterate cgroup_taskset
* @task: the loop cursor
* @skip_css: skip if task's css matches this, %NULL to iterate through all
* @tset: taskset to iterate
*/
#define cgroup_taskset_for_each(task, skip_css, tset) \
#define cgroup_taskset_for_each(task, tset) \
for ((task) = cgroup_taskset_first((tset)); (task); \
(task) = cgroup_taskset_next((tset))) \
if (!(skip_css) || \
cgroup_taskset_cur_css((tset), \
(skip_css)->ss->id) != (skip_css))
(task) = cgroup_taskset_next((tset)))
/*
* Control Group subsystem type.