There are many cases where l_wait_event is used with an l_wait_info parameter that is completely zeroed. This is done to wait for new kernel threads to be started (or exit due to a failure). These cases should be replaced with the native wait_event or wait_event_timeout as appropriate.

An example of the zeroed l_wait_info is in sptlrpc_gc_init:

struct l_wait_info lwi = { 0 };
...
task = kthread_run(...);
...
l_wait_event(sec_gc_thread.t_ctl_waitq, thread_is_running(&sec_gc_thread), &lwi);

This issue was uncovered during the code review at http://review.whamcloud.com/#/c/23754/