simplify growproc

ee3f75f2 · rtm · 98754d68 · ee3f75f2
--- a/proc.c
+++ b/proc.c
@@ -49,16 +49,15 @@ allocproc(void)
 int
 growproc(int n)
 {
-  char *newmem, *oldmem;
+  char *newmem;
  newmem = kalloc(cp->sz + n);
  if(newmem == 0)
    return -1;
  memmove(newmem, cp->mem, cp->sz);
  memset(newmem + cp->sz, 0, n);
-  oldmem = cp->mem;
+  kfree(cp->mem, cp->sz);
  cp->mem = newmem;
-  kfree(oldmem, cp->sz);
  cp->sz += n;
  setupsegs(cp);
  return cp->sz - n;