X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=kernel%2Fprintk.c;h=a430fd04008b4b9565434ebefa0ee48a62dade90;hb=171ac6ae94e31d0fcb5ae922efd4a77a7e48b4e5;hp=de1a4f4470c324f4d93d21292ce3a11ba91b38a3;hpb=e17ba73b0ee6c0f24393c48b455e0d8db761782c;p=safe%2Fjmp%2Flinux-2.6

diff --git a/kernel/printk.c b/kernel/printk.c
index de1a4f4..a430fd0 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -123,6 +123,8 @@ struct console_cmdline
 static struct console_cmdline console_cmdline[MAX_CMDLINECONSOLES];
 static int selected_console = -1;
 static int preferred_console = -1;
+int console_set_on_cmdline;
+EXPORT_SYMBOL(console_set_on_cmdline);
 
 /* Flag: console code may call schedule() */
 static int console_may_schedule;
@@ -870,6 +872,7 @@ static int __init console_setup(char *str)
 	*s = 0;
 
 	__add_preferred_console(buf, idx, options, brl_options);
+	console_set_on_cmdline = 1;
 	return 1;
 }
 __setup("console=", console_setup);
@@ -930,7 +933,7 @@ void suspend_console(void)
 {
 	if (!console_suspend_enabled)
 		return;
-	printk("Suspending console(s)\n");
+	printk("Suspending console(s) (use no_console_suspend to debug)\n");
 	acquire_console_sem();
 	console_suspended = 1;
 }
@@ -1021,7 +1024,9 @@ void release_console_sem(void)
 		_log_end = log_end;
 		con_start = log_end;		/* Flush */
 		spin_unlock(&logbuf_lock);
+		stop_critical_timings();	/* don't trace print latency */
 		call_console_drivers(_con_start, _log_end);
+		start_critical_timings();
 		local_irq_restore(flags);
 	}
 	console_locked = 0;
@@ -1286,46 +1291,19 @@ static int __init disable_boot_consoles(void)
 }
 late_initcall(disable_boot_consoles);
 
-/**
- * tty_write_message - write a message to a certain tty, not just the console.
- * @tty: the destination tty_struct
- * @msg: the message to write
- *
- * This is used for messages that need to be redirected to a specific tty.
- * We don't put it into the syslog queue right now maybe in the future if
- * really needed.
- */
-void tty_write_message(struct tty_struct *tty, char *msg)
-{
-	if (tty && tty->ops->write)
-		tty->ops->write(tty, msg, strlen(msg));
-	return;
-}
-
 #if defined CONFIG_PRINTK
+
 /*
  * printk rate limiting, lifted from the networking subsystem.
  *
- * This enforces a rate limit: not more than one kernel message
- * every printk_ratelimit_jiffies to make a denial-of-service
- * attack impossible.
+ * This enforces a rate limit: not more than 10 kernel messages
+ * every 5s to make a denial-of-service attack impossible.
  */
-int __printk_ratelimit(int ratelimit_jiffies, int ratelimit_burst)
-{
-	return __ratelimit(ratelimit_jiffies, ratelimit_burst);
-}
-EXPORT_SYMBOL(__printk_ratelimit);
-
-/* minimum time in jiffies between messages */
-int printk_ratelimit_jiffies = 5 * HZ;
-
-/* number of messages we send before ratelimiting */
-int printk_ratelimit_burst = 10;
+DEFINE_RATELIMIT_STATE(printk_ratelimit_state, 5 * HZ, 10);
 
 int printk_ratelimit(void)
 {
-	return __printk_ratelimit(printk_ratelimit_jiffies,
-				printk_ratelimit_burst);
+	return __ratelimit(&printk_ratelimit_state);
 }
 EXPORT_SYMBOL(printk_ratelimit);