1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/proc.h b/kernel/proc.h
index 655d79f..538b48a 100644
--- a/kernel/proc.h
+++ b/kernel/proc.h
@@ -91,6 +91,7 @@ struct proc {
   struct proc *parent;         // Parent process
   void *chan;                  // If non-zero, sleeping on chan
   int killed;                  // If non-zero, have been killed
+  int xstate;                  // Exit status to be returned to parent's wait
   int pid;                     // Process ID
 
   // these are private to the process, so p->lock need not be held.