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| author | Tejun Heo <tj@kernel.org> | 2014-07-15 11:05:10 -0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-07-15 11:05:10 -0400 |
| commit | 5de4fa13c4df302db41e80ca679df24fdad0d661 (patch) | |
| tree | be42d0a743175431ee8dc6e5e43df99395163f98 | |
| parent | 05ebb6e60f044a9cef2549b6204559276500f363 (diff) | |
| download | linux-5de4fa13c4df302db41e80ca679df24fdad0d661.tar.gz linux-5de4fa13c4df302db41e80ca679df24fdad0d661.tar.bz2 linux-5de4fa13c4df302db41e80ca679df24fdad0d661.zip | |
cgroup: initialize cgrp_dfl_root_inhibit_ss_mask from !->dfl_files test
cgrp_dfl_root_inhibit_ss_mask determines which subsystems are not
supported on the default hierarchy and is currently initialized
statically and just includes the debug subsystem. Now that there's
cgroup_subsys->dfl_files, we can easily tell which subsystems support
the default hierarchy or not.
Let's initialize cgrp_dfl_root_inhibit_ss_mask by testing whether
cgroup_subsys->dfl_files is NULL. After all, subsystems with NULL
->dfl_files aren't useable on the default hierarchy anyway.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
| -rw-r--r-- | kernel/cgroup.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index f41d164a3d54..f2a6795e695b 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -156,11 +156,7 @@ static bool cgrp_dfl_root_visible; static bool cgroup_legacy_files_on_dfl; /* some controllers are not supported in the default hierarchy */ -static const unsigned int cgrp_dfl_root_inhibit_ss_mask = 0 -#ifdef CONFIG_CGROUP_DEBUG - | (1 << debug_cgrp_id) -#endif - ; +static unsigned int cgrp_dfl_root_inhibit_ss_mask; /* The list of hierarchy roots */ @@ -4939,6 +4935,9 @@ int __init cgroup_init(void) if (cgroup_legacy_files_on_dfl && !ss->dfl_cftypes) ss->dfl_cftypes = ss->legacy_cftypes; + if (!ss->dfl_cftypes) + cgrp_dfl_root_inhibit_ss_mask |= 1 << ss->id; + if (ss->dfl_cftypes == ss->legacy_cftypes) { WARN_ON(cgroup_add_cftypes(ss, ss->dfl_cftypes)); } else { |