RE: linux-next: build failure after merge of the net-next tree

-----Original Message-----
From: Marcin Wojtas <redacted>
Sent: Thursday, June 24, 2021 6:47 AM
To: Stephen Rothwell <redacted>
Cc: David Miller <davem@davemloft.net>; Networking
[off-list ref]; 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 net-next tree

Hi Stephen,

czw., 24 cze 2021 o 00:29 Stephen Rothwell [off-list ref]
napisał(a):

quoted

Hi all,

Today's linux-next build (x86_64 modules_install) failed like this:

depmod: ../tools/depmod.c:1792: depmod_report_cycles_from_root:

Assertion `is < stack_size' failed.

quoted

Caused by commit

62a6ef6a996f ("net: mdiobus: Introduce fwnode_mdbiobus_register()")

(I bisected to there and tested the commit before.)

The actual build is an x86_64 allmodconfig, followed by a
modules_install.  This happens in my cross build environment as well
as a native build.

$ gcc --version
gcc (Debian 10.2.1-6) 10.2.1 20210110
$ ld --version
GNU ld (GNU Binutils for Debian) 2.35.2 $ /sbin/depmod --version kmod
version 28 -ZSTD +XZ -ZLIB +LIBCRYPTO -EXPERIMENTAL

I have no idea why that commit should caused this failure.

Thank you for letting us know. Not sure if related, but I just found out that
this code won't compile for the !CONFIG_FWNODE_MDIO. Below one-liner
fixes it:

--- a/include/linux/fwnode_mdio.h
+++ b/include/linux/fwnode_mdio.h

@@ -40,7 +40,7 @@ static inline int fwnode_mdiobus_register(struct

mii_bus *bus,
         * This way, we don't have to keep compat bits around in drivers.
         */

-       return mdiobus_register(mdio);
+       return mdiobus_register(bus);
 }
 #endif

I'm curious if this is the case. Tomorrow I'll resubmit with above, so I'd
appreciate recheck.