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cpuset: fix the return value of cpuset_write_u64() 

commit a903f0865a190f8778c73df1a810ea6e25e5d7cf upstream.

Writing to this file always returns -ENODEV:

  # echo 1 > cpuset.memory_pressure_enabled
  -bash: echo: write error: No such device

Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Li Zefan 2013-08-13 10:05:59 +08:00 committed by Greg Kroah-Hartman
parent 94aa327e13
commit 9fa6018620
1 changed files with 4 additions and 2 deletions
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6
kernel/cpuset.c
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@ -1502,11 +1502,13 @@ static int cpuset_write_u64(struct cgroup *cgrp, struct cftype *cft, u64 val)
{
struct cpuset *cs = cgroup_cs(cgrp);
cpuset_filetype_t type = cft->private;
int retval = -ENODEV;
int retval = 0;
mutex_lock(&cpuset_mutex);
if (!is_cpuset_online(cs))
if (!is_cpuset_online(cs)) {
retval = -ENODEV;
goto out_unlock;
}
switch (type) {
case FILE_CPU_EXCLUSIVE: