[PATCH v6 2/3] cgroup: export cgroup_e_css()

[Peng Yu]

The nvmet invokes the cgroup_e_css for each bio and under
the rcu protection.

Signed-off-by: Peng Yu <yupeng0921 at gmail.com>
Assisted-by: Claude:claude-fable-5 [Claude Code]
Assisted-by: Claude:claude-opus-5-5 [Claude Code]
---
 kernel/cgroup/cgroup.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 69b0f0cf2f3e..5a1708ed6b23 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -554,6 +554,7 @@ struct cgroup_subsys_state *cgroup_e_css(struct cgroup *cgrp,
 	return rcu_dereference_check(cgrp->e_css[ss->id],
 				     lockdep_is_held(&cgroup_mutex));
 }
+EXPORT_SYMBOL_GPL(cgroup_e_css);
 
 /**
  * cgroup_get_e_css - get a cgroup's effective css for the specified subsystem
-- 
2.53.0