1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/proc.h b/kernel/proc.h
index 278e4cd..0fa61ff 100644
--- a/kernel/proc.h
+++ b/kernel/proc.h
@@ -82,6 +82,7 @@ enum procstate { UNUSED, EMBRYO, SLEEPING, RUNNABLE, RUNNING, ZOMBIE };
 
 // Per-process state
 struct proc {
+  struct spinlock lock;
   char *kstack;                // Bottom of kernel stack for this process
   uint64 sz;                   // Size of process memory (bytes)
   pagetable_t pagetable;       // Page table