On Thu, Jan 28, 2021 at 05:50:56PM -0300, Thiago Jung Bauermann wrote:

quoted

 struct module *find_module(const char *name)
 {
-	module_assert_mutex();

Does it make sense to replace the assert above with the warn below (untested)?

     RCU_LOCKDEP_WARN(rcu_read_lock_sched_held());

One caller actually holds module_mutex still.  And find_module_all,
which implements the actual logic already asserts that either
module_mutex is held or rcu_read_lock, so I don't tink we need an
extra one here.