The function complete_all() modifies the completion "done" variable to UINT_MAX, and no other caller (wait_for_completion(), etc) will modify it back to zero. That means that any call to complete_all() must have a reinit_completion() before that completion can be used again.
Document this fact by the complete_all() function. Signed-off-by: Steven Rostedt (VMware) <[email protected]> --- diff --git a/kernel/sched/completion.c b/kernel/sched/completion.c index 13fc5ae..cc9d926 100644 --- a/kernel/sched/completion.c +++ b/kernel/sched/completion.c @@ -47,6 +47,9 @@ EXPORT_SYMBOL(complete); * * It may be assumed that this function implies a write memory barrier before * changing the task state if and only if any tasks are woken up. + * + * A call to reinit_completion() must be used on @x if it is to be used + * again after this call. */ void complete_all(struct completion *x) {
