On Tue, May 28, 2019 at 02:14:43PM -0700, Stanislav Fomichev wrote: > Now that we don't have __rcu markers on the bpf_prog_array helpers, > let's use proper rcu_dereference_protected to obtain array pointer > under mutex. > > We also don't need __rcu annotations on cgroup_bpf.inactive since > it's not read/updated concurrently. > > v4: > * drop cgroup_rcu_xyz wrappers and use rcu APIs directly; presumably > should be more clear to understand which mutex/refcount protects > each particular place > > v3: > * amend cgroup_rcu_dereference to include percpu_ref_is_dying; > cgroup_bpf is now reference counted and we don't hold cgroup_mutex > anymore in cgroup_bpf_release > > v2: > * replace xchg with rcu_swap_protected > > Cc: Roman Gushchin <guro@xxxxxx> > Signed-off-by: Stanislav Fomichev <sdf@xxxxxxxxxx> Yeah, the looks even better. Acked-by: Roman Gushchin <guro@xxxxxx> Thanks!
