nit in comment

diff --git a/proc.c b/proc.c
index 96c19f501e052a1cfe977386c84e3642bd3d4411..669331e19ca20492e5f52e2914c011e99995e2e3 100644 (file)
--- a/proc.c
+++ b/proc.c
@@ -116,7 +116,7 @@ found:
   p->pid = nextpid++;
   release(&ptable.lock);
 
-  // Allocate kernel stack if necessary.
+  // Allocate kernel stack if possible.
   if((p->kstack = kalloc(KSTACKSIZE)) == 0){
     p->state = UNUSED;
     return 0;