From: Charalampos Mitrodimas <charmitro@posteo.net>
To: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Greg KH <greg@kroah.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux Next Mailing List <linux-next@vger.kernel.org>
Subject: Re: linux-next: build failure after merge of the tty tree
Date: Wed, 01 Oct 2025 00:00:04 +0000 [thread overview]
Message-ID: <87frc3sd8d.fsf@posteo.net> (raw)
In-Reply-To: <20250729151404.03ac580e@canb.auug.org.au>
Stephen Rothwell <sfr@canb.auug.org.au> writes:
> Hi all,
>
> After merging the tty tree, today's linux-next build (x86_64
> modules_install) failed like this:
>
> depmod: ERROR: Cycle detected: 8250 -> 8250_base -> 8250
> depmod: ERROR: Found 2 modules in dependency cycles!
The cycle was introduced by commit
b20d6576cdb3 ("serial: 8250: export RSA functions")
which exported RSA functions from 8250.ko to 8250_base.ko to fix this
issue:
ERROR: modpost: "rsa_autoconfig" [drivers/tty/serial/8250/8250_base.ko] undefined!
ERROR: modpost: "rsa_reset" [drivers/tty/serial/8250/8250_base.ko] undefined!
ERROR: modpost: "rsa_disable" [drivers/tty/serial/8250/8250_base.ko] undefined!
ERROR: modpost: "rsa_enable" [drivers/tty/serial/8250/8250_base.ko] undefined!
which was a regression introduced in this patchset[1].
Before this patchset there's no issue at all:
INSTALL /tmp/test_cycle/lib/modules/6.16.0-rc2/kernel/drivers/tty/serial/8250/8250.ko
INSTALL /tmp/test_cycle/lib/modules/6.16.0-rc2/kernel/drivers/tty/serial/8250/8250_base.ko
INSTALL /tmp/test_cycle/lib/modules/6.16.0-rc2/kernel/drivers/tty/serial/8250/8250_exar.ko
INSTALL /tmp/test_cycle/lib/modules/6.16.0-rc2/kernel/drivers/tty/serial/8250/8250_lpss.ko
INSTALL /tmp/test_cycle/lib/modules/6.16.0-rc2/kernel/drivers/tty/serial/8250/8250_mid.ko
INSTALL /tmp/test_cycle/lib/modules/6.16.0-rc2/kernel/drivers/tty/serial/8250/8250_pci.ko
INSTALL /tmp/test_cycle/lib/modules/6.16.0-rc2/kernel/drivers/tty/serial/8250/8250_pericom.ko
INSTALL /tmp/test_cycle/lib/modules/6.16.0-rc2/kernel/drivers/tty/serial/serial_base.ko
So circular dependency landed in b20d6576cdb3 since 8250_base already
depends on 8250.
I'm guessing the fix would be to merge 8250_base.ko into 8250.ko in
drivers/tty/serial/8250/Makefile?
Stephen, I mistakenly sent this off-list to you, ignore it.
[1]: https://lore.kernel.org/all/20250611100319.186924-1-jirislaby@kernel.org/
>
> I can't see what would have caused this (it actually appeared yesterday).
> I am not even sure it is something in the tty tree.
next prev parent reply other threads:[~2025-10-01 0:00 UTC|newest]
Thread overview: 120+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-29 5:14 linux-next: build failure after merge of the tty tree Stephen Rothwell
2025-10-01 0:00 ` Charalampos Mitrodimas [this message]
-- strict thread matches above, loose matches on Subject: below --
2025-06-19 6:56 Stephen Rothwell
2025-06-19 8:19 ` Greg KH
2025-06-23 6:03 ` Jiri Slaby
2025-03-24 8:37 Stephen Rothwell
2025-03-24 9:10 ` Sherry Sun
2025-03-24 13:27 ` Greg KH
2025-02-06 2:53 Stephen Rothwell
2025-02-06 5:15 ` Greg KH
2025-02-06 7:40 ` Benjamin Larsson
2025-02-06 8:14 ` Greg KH
2025-02-06 23:09 ` Stephen Rothwell
2025-02-09 21:13 ` Benjamin Larsson
2024-04-11 5:48 Stephen Rothwell
2024-04-11 5:59 ` Tony Lindgren
2023-01-23 2:18 Stephen Rothwell
2023-01-23 9:46 ` Bartosz Golaszewski
2023-01-23 17:52 ` Greg KH
2022-08-02 20:06 broonie
2022-08-02 20:27 ` Doug Anderson
2022-08-03 6:10 ` Greg KH
2019-06-13 5:32 Stephen Rothwell
2019-06-13 6:10 ` Greg KH
2018-10-04 5:19 Stephen Rothwell
2018-10-04 16:34 ` Steve Sakoman
2018-10-04 17:00 ` Greg Kroah-Hartman
2018-10-04 17:13 ` Steve Sakoman
2018-10-04 18:13 ` Steve Sakoman
2018-10-04 18:22 ` Greg Kroah-Hartman
2018-09-11 2:58 Stephen Rothwell
2018-09-11 8:23 ` Greg KH
2018-09-11 8:25 ` Lee Jones
2018-09-11 8:32 ` Nicolas Ferre
2018-09-11 8:43 ` Lee Jones
2018-09-18 4:54 ` Andy Shevchenko
2017-12-18 3:28 Stephen Rothwell
2017-12-18 8:52 ` Geert Uytterhoeven
2017-12-18 9:02 ` Greg KH
2017-12-18 9:33 ` Greg KH
2017-02-06 4:22 Stephen Rothwell
2017-02-06 8:51 ` Greg KH
2017-02-06 14:09 ` Rob Herring
2017-02-06 15:18 ` Greg KH
2017-02-06 20:38 ` Stephen Rothwell
2016-09-30 3:54 Stephen Rothwell
2016-09-30 5:46 ` Greg KH
2015-08-18 6:01 Stephen Rothwell
2015-08-18 16:12 ` Greg KH
2015-05-11 5:16 Stephen Rothwell
2015-05-11 10:42 ` Dave Martin
2014-09-30 7:39 Stephen Rothwell
2014-09-30 7:52 ` Sebastian Andrzej Siewior
2014-09-30 8:09 ` Stephen Rothwell
2014-09-25 6:30 Stephen Rothwell
2014-09-25 11:04 ` Greg KH
2014-05-29 7:28 Stephen Rothwell
[not found] ` <5EB3BFCD089AD643B9BB63439F5FD5E9012BF05ED1@SHAASIEXM01.ASIA.ROOT.PRI>
2014-05-29 12:29 ` Barry Song
2013-10-31 7:40 Stephen Rothwell
2013-10-31 10:35 ` Sedat Dilek
2013-10-31 13:09 ` Philippe Proulx
2013-10-31 13:24 ` Greg KH
2013-07-24 4:42 Stephen Rothwell
2013-07-24 13:29 ` Peter Hurley
2013-05-21 3:25 Stephen Rothwell
2013-03-20 3:12 Stephen Rothwell
2013-03-20 8:17 ` Jiri Slaby
2013-03-20 12:51 ` Bill Pemberton
2013-03-20 12:51 ` Bill Pemberton
2013-03-20 14:17 ` Jiri Slaby
2013-03-20 14:42 ` Bill Pemberton
2013-03-20 14:42 ` Bill Pemberton
2013-03-20 15:13 ` Jiri Slaby
2013-03-20 15:15 ` Bill Pemberton
2013-03-20 15:15 ` Bill Pemberton
2013-03-21 0:16 ` Greg KH
2013-03-21 22:54 ` Stephen Rothwell
2013-03-21 23:28 ` Stephen Rothwell
2013-03-21 23:47 ` Greg KH
2013-03-22 0:42 ` Stephen Rothwell
2013-03-21 23:36 ` Greg KH
2013-03-21 4:20 ` Stephen Rothwell
2012-10-24 2:28 Stephen Rothwell
2012-10-24 2:51 ` Greg KH
2012-09-06 5:10 Stephen Rothwell
2012-09-06 11:47 ` Alan Cox
2012-07-20 3:33 Stephen Rothwell
2012-07-25 22:51 ` Stephen Rothwell
2012-07-26 0:25 ` Alan Cox
2012-07-20 3:28 Stephen Rothwell
2012-07-25 22:47 ` Greg KH
2012-07-25 22:49 ` Stephen Rothwell
2012-07-19 4:36 Stephen Rothwell
2012-07-19 10:41 ` Alan Cox
2012-07-17 3:45 Stephen Rothwell
2012-07-17 10:10 ` Alan Cox
2012-07-17 15:45 ` Greg KH
2012-07-17 15:45 ` Greg KH
2012-07-17 16:05 ` Alan Cox
2012-07-13 4:13 Stephen Rothwell
2012-07-13 11:10 ` Alan Cox
2012-07-20 18:38 ` Geert Uytterhoeven
2012-07-20 20:55 ` Alan Cox
2012-07-20 21:06 ` Geert Uytterhoeven
2012-04-10 3:06 Stephen Rothwell
2011-08-24 4:33 Stephen Rothwell
2011-08-24 4:50 ` Greg KH
2011-08-24 4:50 ` Greg KH
2011-02-24 5:40 Stephen Rothwell
2011-02-25 17:54 ` Greg KH
2010-09-23 4:20 Stephen Rothwell
2010-09-23 14:14 ` Greg KH
2010-09-23 15:13 ` Randy Dunlap
2010-09-23 15:46 ` Alan Cox
2010-09-23 17:12 ` Alan Cox
2010-09-23 17:13 ` Randy Dunlap
2010-07-27 5:18 Stephen Rothwell
2010-07-27 7:43 ` Alan Cox
2010-07-27 16:47 ` Greg KH
2010-07-28 1:19 ` Stephen Rothwell
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