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authorRobin Getz <rgetz@blackfin.uclinux.org>2007-08-20 15:22:47 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-20 22:42:01 -0700
commit0c5564bd91ad237212871d52deaf79ffe06bcc64 (patch)
tree3ed3c0e6356f88593f20c4206904a28b794e9fbf /kernel/printk.c
parent35b426c329e12e33bd0f0912f3d2e3f5f7b2c486 (diff)
ensure we don't use bootconsoles after init has been released
This is a followup to the cleanups for earlyprintk patch from Gerd Hoffmann http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=69331af79cf29e26d1231152a172a1a10c2df511 This ensures that a bootconsole is unregistered if it is not replaced. The current implementation spews garbage out the bootconsole in this case, since the bootconsole structure is normally in the init section, and is freed, but still used. Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Cc: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/printk.c')
-rw-r--r--kernel/printk.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/printk.c b/kernel/printk.c
index bd2cd062878d..5c7c325b29cc 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1083,6 +1083,17 @@ int unregister_console(struct console *console)
}
EXPORT_SYMBOL(unregister_console);
+static int __init disable_boot_consoles(void)
+{
+ if (console_drivers->flags & CON_BOOT) {
+ printk(KERN_INFO "turn off boot console %s%d\n",
+ console_drivers->name, console_drivers->index);
+ return unregister_console(console_drivers);
+ }
+ return 0;
+}
+late_initcall(disable_boot_consoles);
+
/**
* tty_write_message - write a message to a certain tty, not just the console.
* @tty: the destination tty_struct