more idiomatic c

kalloc.c

@@ -31,7 +31,7 @@ void ktest();
  * after _end.
  */
 void
-kinit()
+kinit(void)
 {
   extern int end;
   unsigned mem;
@@ -133,7 +133,7 @@ kalloc(int n)
 }
 
 void
-ktest()
+ktest(void)
 {
   char *p1, *p2, *p3;
 
@@ -158,10 +158,7 @@ ktest()
 
   // test running out of memory
   p1 = 0;
-  while(1){
-    p2 = kalloc(PAGE);
-    if(p2 == 0)
-      break;
+  while((p2 = kalloc(PAGE)) != 0){
     *(char**)p2 = p1;
     p1 = p2;
   }