1 files changed, 7 insertions, 2 deletions
diff --git a/console.c b/console.c
index 3745009..b85a295 100644
--- a/console.c
+++ b/console.c
@@ -4,6 +4,7 @@
 #include "spinlock.h"
 
 struct spinlock console_lock;
+int use_printf_lock = 0;
 
 /*
  * copy console output to parallel port, which you can tell
@@ -29,7 +30,8 @@ cons_putc(int c)
   unsigned short *crt = (unsigned short *) 0xB8000; // base of CGA memory
   int ind;
 
-  //acquire(&console_lock);
+  if(use_printf_lock)
+    acquire(&console_lock);
 
   lpt_putc(c);
 
@@ -62,7 +64,8 @@ cons_putc(int c)
   outb(crtport, 15);
   outb(crtport + 1, ind);
 
-  //release(&console_lock);
+  if(use_printf_lock)
+    release(&console_lock);
 }
 
 void
@@ -127,6 +130,8 @@ cprintf(char *fmt, ...)
 void
 panic(char *s)
 {
+  use_printf_lock = 0;
+  cprintf("panic: ");
   cprintf(s, 0);
   cprintf("\n", 0);
   while(1)