Make the process_exit eventhandler run without Giant. Add Giant hooks

in the two consumers that need it.. processes using AIO and netncp.
Update docs.  Say that process_exec is called with Giant, but not to
depend on it.  All our consumers can handle it without Giant.

1 files changed, 2 insertions, 2 deletions

diff --git a/sys/sys/eventhandler.h b/sys/sys/eventhandler.h
index 3f623b2..c734c19 100644
--- a/sys/sys/eventhandler.h
+++ b/sys/sys/eventhandler.h
@@ -158,8 +158,8 @@ EVENTHANDLER_DECLARE(vm_lowmem, vm_lowmem_handler_t);
 
 /*
  * Process events
- * process_fork handlers are called without Giant.
- * exit/exec handlers are called with Giant.
+ * process_fork and exit handlers are called without Giant.
+ * exec handlers are called with Giant, but that is by accident.
  */
 struct proc;