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| author | Chen Ridong <chenridong@huawei.com> | 2025-08-13 08:29:01 +0000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2025-08-13 08:14:20 -1000 |
| commit | 4c70fb2624ab1588faa58dcd407d4c61d64b288d (patch) | |
| tree | 8e7f07a5ee8568d13ee5bfa15b1d4e72ffe0fb8c /rust/helpers/helpers.c | |
| parent | 8a013ec9cb7af9921656c0e78c73510c9e4a0cc1 (diff) | |
cpuset: remove redundant CS_ONLINE flag
The CS_ONLINE flag was introduced prior to the CSS_ONLINE flag in the
cpuset subsystem. Currently, the flag setting sequence is as follows:
1. cpuset_css_online() sets CS_ONLINE
2. css->flags gets CSS_ONLINE set
...
3. cgroup->kill_css sets CSS_DYING
4. cpuset_css_offline() clears CS_ONLINE
5. css->flags clears CSS_ONLINE
The is_cpuset_online() check currently occurs between steps 1 and 3.
However, it would be equally safe to perform this check between steps 2
and 3, as CSS_ONLINE provides the same synchronization guarantee as
CS_ONLINE.
Since CS_ONLINE is redundant with CSS_ONLINE and provides no additional
synchronization benefits, we can safely remove it to simplify the code.
Signed-off-by: Chen Ridong <chenridong@huawei.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'rust/helpers/helpers.c')
0 files changed, 0 insertions, 0 deletions