Subject: Re: linux-next: build failure after merge of the printk tree

From: Petr Mladek <[email-masked]>
Date: Mon, 21 Nov 2022 14:42:22 +0100

On Mon 2022-11-21 11:00:41, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the printk tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
> 
> ERROR: modpost: "lockdep_assert_console_list_lock_held" [drivers/video/fbdev/xen-fbfront.ko] undefined!
> ERROR: modpost: "lockdep_assert_console_list_lock_held" [drivers/tty/serial/8250/8250.ko] undefined!
> ERROR: modpost: "lockdep_assert_console_list_lock_held" [drivers/tty/serial/samsung_tty.ko] undefined!
> ERROR: modpost: "lockdep_assert_console_list_lock_held" [drivers/tty/serial/kgdboc.ko] undefined!
> ERROR: modpost: "lockdep_assert_console_list_lock_held" [drivers/net/netconsole.ko] undefined!
> 
> Presumably caused by commits
> 
>   c26c1533e3bd ("printk: introduce console_list_lock")
>   a71ba89dc3ed ("console: introduce wrappers to read/write console flags")
>   d3ca62bf29bb ("console: introduce console_is_registered()")

John has fixed this by adding EXPORT_SYMBOL() for this function.

> I have used the printk tree from next-20221118 for today.

It is now fixed in "for-next" branch in printk/linux.git.

Thanks a lot for the report!

Best Regards,
Petr