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| author | Li Zefan <lizefan@huawei.com> | 2013-08-13 10:05:59 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-20 08:43:05 -0700 |
| commit | 9fa6018620ff121a3d892394021d4285636b7cd5 (patch) | |
| tree | 31b7a35aa9d76b72aeeb4ed841a9d2986b6e7b5a | |
| parent | 94aa327e13898c4c495a27303ce96cc52280fb25 (diff) | |
| download | lwn-9fa6018620ff121a3d892394021d4285636b7cd5.tar.gz lwn-9fa6018620ff121a3d892394021d4285636b7cd5.zip | |
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>
| -rw-r--r-- | kernel/cpuset.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 64b3f791bbe5..6948e9476b42 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -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: |