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authorKay Sievers <kay.sievers@vrfy.org>2010-12-01 18:51:05 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2010-12-16 16:15:34 -0800
commitfbc92a3455577ab17615cbcb91826399061bd789 (patch)
tree0f47703d9d3b40969e007a6d27a1b603cdff43da /kernel
parent35c64e5d13c3d7d8c4ad061ad5e20498b9160c24 (diff)
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tty: add 'active' sysfs attribute to tty0 and console device
tty: add 'active' sysfs attribute to tty0 and console device Userspace can query the actual virtual console, and the configured console devices behind /dev/tt0 and /dev/console. The last entry in the list of devices is the active device, analog to the console= kernel command line option. The attribute supports poll(), which is raised when the virtual console is changed or /dev/console is reconfigured. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> index 0000000..b138b66
Diffstat (limited to 'kernel')
-rw-r--r--kernel/printk.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/printk.c b/kernel/printk.c
index bf0420a92a1a..5417784a76b5 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1332,6 +1332,7 @@ void register_console(struct console *newcon)
spin_unlock_irqrestore(&logbuf_lock, flags);
}
release_console_sem();
+ console_sysfs_notify();
/*
* By unregistering the bootconsoles after we enable the real console
@@ -1390,6 +1391,7 @@ int unregister_console(struct console *console)
console_drivers->flags |= CON_CONSDEV;
release_console_sem();
+ console_sysfs_notify();
return res;
}
EXPORT_SYMBOL(unregister_console);