The patch titled
ensure we don't use bootconsoles after init has been released
has been added to the -mm tree. Its filename is
ensure-we-dont-use-bootconsoles-after-init-has-been-released.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: ensure we don't use bootconsoles after init has been released
From: Robin Getz <rgetz@xxxxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxxxx>
Acked-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: Mike Frysinger <vapier.adi@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/printk.c | 11 +++++++++++
1 files changed, 11 insertions(+)
diff -puN kernel/printk.c~ensure-we-dont-use-bootconsoles-after-init-has-been-released kernel/printk.c
--- a/kernel/printk.c~ensure-we-dont-use-bootconsoles-after-init-has-been-released
+++ a/kernel/printk.c
@@ -1206,6 +1206,17 @@ int unregister_console(struct console *c
}
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
_
Patches currently in -mm which might be from rgetz@xxxxxxxxxxxxxxxxxxxx are
printk-add-interfaces-for-external-access-to-the-log-buffer.patch
printk-add-interfaces-for-external-access-to-the-log-buffer-fix.patch
printk-add-interfaces-for-external-access-to-the-log-buffer-fix-2.patch
ensure-we-dont-use-bootconsoles-after-init-has-been-released.patch
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