Trying to get closer to the original OS/161 sources.

kern/lib/misc.c

@@ -30,7 +30,6 @@
 #include <types.h>
 #include <kern/errmsg.h>
 #include <lib.h>
-#include <thread.h>
 
 /*
  * Like strdup, but calls kmalloc.
@@ -61,27 +60,3 @@ strerror(int errcode)
 	panic("Invalid error code %d\n", errcode);
 	return NULL;
 }
-
-/*
- * Helper functions used by testing and problem driver code
- * to establish better mixtures of threads.
- */
-
-void
-random_yielder(uint32_t max_yield_count)
-{
-	uint32_t i;
-	for (i = 0; i < random() % max_yield_count; i++) {
-		thread_yield();
-	}
-}
-
-void
-random_spinner(uint32_t max_spin_count)
-{
-	uint32_t i;
-	volatile int spin;
-	for (i = 0; i < random() % max_spin_count; i++) {
-		spin += i;
-	}
-}