sched_ext: Add scx_cgroup_sched() for cgrp->scx_sched reads

cgrp->scx_sched is __rcu and published with rcu_assign_pointer() but every
reader loads it with a plain access, so sparse flags all of them. The reads
are lock-protected: enable/disable paths rewrite the field under all of
scx_enable_mutex, scx_fork_rwsem and cgroup_mutex, and cgroup creation
inherits the parent's sched under cgroup_mutex before the new cgroup is
reachable, so holding any one of the three locks makes the read stable.

Add scx_cgroup_sched() which states the protection with
rcu_dereference_check() and convert the readers. No functional changes.

Signed-off-by: Tejun Heo <tj@kernel.org>

0 files changed, 0 insertions, 0 deletions