linux-kernel - Re: [Bug Report] Depmod is failing on allmodconfig for arm64 and x86

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Message-ID: <Z03fvf3RT7mq9hUZ@mozart.vkv.me>
Date: Mon, 2 Dec 2024 08:26:37 -0800
From: Calvin Owens <calvin@...nvd.org>
To: Muhammad Usama Anjum <Usama.Anjum@...labora.com>
Cc: LKML <linux-kernel@...r.kernel.org>, Steen.Hegelund@...rochip.com,
	daniel.machon@...rochip.com, kuba@...nel.org
Subject: Re: [Bug Report] Depmod is failing on allmodconfig for arm64 and
 x86_64

On Tuesday 11/26 at 18:25 +0500, Muhammad Usama Anjum wrote:
> Hi,
>
> The depmod is failing on 9f16d5e6f2206 (mainline) arm64 and x86_64 because of:
> ```
> depmod: ERROR: Cycle detected: libphy
>
> depmod: ERROR: Cycle detected: lan969x_switch -> sparx5_switch -> lan969x_switch
> depmod: ERROR: Cycle detected: ptp
> depmod: ERROR: Cycle detected: stp
> depmod: ERROR: Cycle detected: ipv6
> depmod: ERROR: Cycle detected: bridge
> depmod: ERROR: Found 2 modules in dependency cycles!
> make[2]: *** [scripts/Makefile.modinst:132: depmod] Error 1
> make[1]: *** [/tmp/kci/linux/Makefile:1844: modules_install] Error 2
> make: *** [Makefile:224: __sub-make] Error 2
> ```
>
> This issue wasn't present until c66fbc6c3df9.

I set up a bisect script to run overnight, it landed here:

    98a01119608d21e0ed95a544071beabb353240ed is the first bad commit
    commit 98a01119608d21e0ed95a544071beabb353240ed
    Author:     Daniel Machon <daniel.machon@...rochip.com>
    AuthorDate: Thu Oct 24 00:01:33 2024 +0200
    Commit:     Jakub Kicinski <kuba@...nel.org>
    CommitDate: Wed Oct 30 18:08:06 2024 -0700

        net: sparx5: add compatible string for lan969x

        Add lan9691-switch compatible string to mchp_sparx5_match. Guard it with
        IS_ENABLED(CONFIG_LAN969X_SWITCH) to make sure Sparx5 can be compiled on
        its own.

        Reviewed-by: Steen Hegelund <Steen.Hegelund@...rochip.com>
        Signed-off-by: Daniel Machon <daniel.machon@...rochip.com>
        Link: https://patch.msgid.link/20241024-sparx5-lan969x-switch-driver-2-v2-14-a0b5fae88a0f@microchip.com
        Signed-off-by: Jakub Kicinski <kuba@...nel.org>

     drivers/net/ethernet/microchip/sparx5/sparx5_main.c | 5 +++++
     1 file changed, 5 insertions(+)
    bisect found first bad commit

Thanks,
Calvin

> [1] https://kcidb.kernelci.org/d/build/build?orgId=1&var-datasource=default&var-build_architecture=arm64&var-build_config_name=defconfig+allmodconfig&var-id=maestro:67427d2a923416c0c993033a
> [2] https://kcidb.kernelci.org/d/build/build?orgId=1&var-datasource=default&var-build_architecture=x86_64&var-build_config_name=x86_64_defconfig%20allmodconfig&var-id=maestro:67427d2c923416c0c9930358&from=now-100y&to=now&timezone=browser&var-origin=$__all&var-test_path=&var-issue_presence=yes
> 
> -- 
> BR,
> Muhammad Usama Anjum