Merge branch 'perfcounters-core-for-linus' of git://git.kernel.org/pub/scm/linux...

[safe/jmp/linux-2.6] / kernel / printk.c

diff --git a/kernel/printk.c b/kernel/printk.c
index 668df35..e10d193 100644 (file)
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -67,6 +67,8 @@ int console_printk[4] = {
        DEFAULT_CONSOLE_LOGLEVEL,       /* default_console_loglevel */
 };
 
+static int saved_console_loglevel = -1;
+
 /*
  * Low level drivers may need that to know if they can schedule in
  * their unblank() callback or not. So let's export it.
@@ -378,10 +380,15 @@ int do_syslog(int type, char __user *buf, int len)
                logged_chars = 0;
                break;
        case 6:         /* Disable logging to console */
+               if (saved_console_loglevel == -1)
+                       saved_console_loglevel = console_loglevel;
                console_loglevel = minimum_console_loglevel;
                break;
        case 7:         /* Enable logging to console */
-               console_loglevel = default_console_loglevel;
+               if (saved_console_loglevel != -1) {
+                       console_loglevel = saved_console_loglevel;
+                       saved_console_loglevel = -1;
+               }
                break;
        case 8:         /* Set level of messages printed to console */
                error = -EINVAL;
@@ -390,6 +397,8 @@ int do_syslog(int type, char __user *buf, int len)
                if (len < minimum_console_loglevel)
                        len = minimum_console_loglevel;
                console_loglevel = len;
+               /* Implicitly re-enable logging to console */
+               saved_console_loglevel = -1;
                error = 0;
                break;
        case 9:         /* Number of chars in the log buffer */
@@ -1343,7 +1352,7 @@ static int __init disable_boot_consoles(void)
                if (con->flags & CON_BOOT) {
                        printk(KERN_INFO "turn off boot console %s%d\n",
                                con->name, con->index);
-                       return unregister_console(con);
+                       unregister_console(con);
                }
        }
        return 0;