--- linux/arch/i386/kernel/process.c	Fri Oct 12 22:22:20 2001
+++ linux/arch/i386/kernel/process.c	Fri Oct 12 22:23:30 2001
@@ -516,7 +516,9 @@
  */
 void exit_thread(void)
 {
+#ifdef	CONFIG_KPERFCTR
 	perfctr_exit_thread(&current->thread);
+#endif
 }
 
 void flush_thread(void)
@@ -598,7 +600,9 @@
 	unlazy_fpu(current);
 	struct_cpy(&p->thread.i387, &current->thread.i387);
 
+#ifdef	CONFIG_KPERFCTR
 	perfctr_copy_thread(&p->thread);
+#endif
 
 	return 0;
 }
@@ -682,7 +686,9 @@
 				 *next = &next_p->thread;
 	struct tss_struct *tss = init_tss + smp_processor_id();
 
+#ifdef	CONFIG_KPERFCTR
 	perfctr_suspend_thread(prev);
+#endif
 
 	unlazy_fpu(prev_p);
 
@@ -740,7 +746,9 @@
 			tss->bitmap = INVALID_IO_BITMAP_OFFSET;
 	}
 
+#ifdef	CONFIG_KPERFCTR
 	perfctr_resume_thread(next);
+#endif
 }
 
 asmlinkage int sys_fork(struct pt_regs regs)