1 files changed, 5 insertions, 0 deletions

diff --git a/kernel/module.c b/kernel/module.c
index ce8066b88178..c9bea7f2b43e 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -3517,6 +3517,11 @@ static noinline int do_init_module(struct module *mod)
          * walking this with preempt disabled.  In all the failure paths, we
          * call synchronize_sched(), but we don't want to slow down the success
          * path, so use actual RCU here.
+         * Note that module_alloc() on most architectures creates W+X page
+         * mappings which won't be cleaned up until do_free_init() runs.  Any
+         * code such as mark_rodata_ro() which depends on those mappings to
+         * be cleaned up needs to sync with the queued work - ie
+         * rcu_barrier_sched()
          */
         call_rcu_sched(&freeinit->rcu, do_free_init);
         mutex_unlock(&module_mutex);