suppress write() output after panic()

2 files changed, 7 insertions, 1 deletions

diff --git a/kernel/console.c b/kernel/console.c
index 2b1ed3c..1885593 100644
--- a/kernel/console.c
+++ b/kernel/console.c
@@ -66,6 +66,12 @@ int
 consolewrite(int user_src, uint64 src, int n)
 {
   int i;
+  extern volatile int panicked; // from printf.c
+
+  if(panicked){
+    for(;;)
+      ;
+  }
 
   acquire(&cons.lock);
   for(i = 0; i < n; i++){
diff --git a/kernel/printf.c b/kernel/printf.c
index 777cc5f..1a83284 100644
--- a/kernel/printf.c
+++ b/kernel/printf.c
@@ -121,7 +121,7 @@ panic(char *s)
   printf("panic: ");
   printf(s);
   printf("\n");
-  panicked = 1; // freeze other CPUs
+  panicked = 1; // freeze output from other CPUs
   for(;;)
     ;
 }