Subject: Re: [next-20260122] Build failure on IBM Power Server

From: "Christophe Leroy (CS GROUP)" <[email-masked]>
Date: Fri, 23 Jan 2026 10:52:49 +0100

+Vladimir, Maxime, Jakub and netdev

Le 23/01/2026 à 10:11, Venkat Rao Bagalkote a écrit :
> 
> On 23/01/26 1:17 pm, Randy Dunlap wrote:
>>
>> On 1/22/26 8:15 PM, Venkat Rao Bagalkote wrote:
>>> Greetings!!
>>>
>>> IBM CI has reported build failure of 20260122 on IBM Power server.
>>>
>>>
>>> Error:
>>>
>>>
>>> ERROR: modpost: "phy_get_rx_polarity" [drivers/net/phy/ 
>>> air_en8811h.ko] undefined!
>>> ERROR: modpost: "phy_get_tx_polarity" [drivers/net/phy/ 
>>> air_en8811h.ko] undefined!
>>> make[2]: *** [scripts/Makefile.modpost:147: Module.symvers] Error 1
>>> make[1]: *** [/home/upstreamci/linux/Makefile:2040: modpost] Error 2
>>> make: *** [Makefile:248: __sub-make] Error 2

Thanks for the config file.

The probleme is because allthough CONFIG_PHY_COMMON_PROPS is selected, 
drivers/phy/phy-common-props.o is not built because CONFIG_GENERIC_PHY 
is not selected.

Likely comes from commit 66d8a334b57e ("net: phy: air_en8811h: deprecate 
"airoha,pnswap-rx" and "airoha,pnswap-tx"")

Christophe

>>>
>>>
>>> IBM CI has bisected this issue and below is the bisection log.
>>>
>>>
>>> git bisect log
>>> git bisect log
>>> git bisect start
>>> # status: waiting for both good and bad commits
>>> # good: [24d479d26b25bce5faea3ddd9fa8f3a6c3129ea7] Linux 6.19-rc6
>>> git bisect good 24d479d26b25bce5faea3ddd9fa8f3a6c3129ea7
>>> # status: waiting for bad commit, 1 good commit known
>>> # bad: [a0c666c25aeefd16f4b088c6549a6fb6b65a8a1d] Add linux-next 
>>> specific files for 20260122
>>> git bisect bad a0c666c25aeefd16f4b088c6549a6fb6b65a8a1d
>>> # good: [2574bcf1765ec13bf3ef469aa5b15cce293aebb6] Merge branch 
>>> 'master' of https://eur01.safelinks.protection.outlook.com/? 
>>> url=https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Fbluetooth%2Fbluetooth-next.git&data=05%7C02%7Cchristophe.leroy2%40cs-soprasteria.com%7C441b227c282845cf2a3308de5a5f8110%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639047563441808471%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=FlVDfg3VVHplFxnQpG4oQNlr5Mm3ZzaCve19hnomYNo%3D&reserved=0
>>> git bisect good 2574bcf1765ec13bf3ef469aa5b15cce293aebb6
>>> # good: [2ad38467d20c16f38d0cffad711ef4f4acdb8b29] Merge branch 'for- 
>>> next' of https://eur01.safelinks.protection.outlook.com/? 
>>> url=https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Faxboe%2Flinux.git&data=05%7C02%7Cchristophe.leroy2%40cs-soprasteria.com%7C441b227c282845cf2a3308de5a5f8110%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639047563441834557%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=ez4lgXXDn95PjgZNSAjwp%2BWbvJvQYLeHApGrODqs%2Fmc%3D&reserved=0
>>> git bisect good 2ad38467d20c16f38d0cffad711ef4f4acdb8b29
>>> # good: [a954370fea56ee1bf995524255a34da7a1ddb524] Merge branch 'for- 
>>> next' of https://eur01.safelinks.protection.outlook.com/? 
>>> url=https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Fpdx86%2Fplatform-drivers-x86.git&data=05%7C02%7Cchristophe.leroy2%40cs-soprasteria.com%7C441b227c282845cf2a3308de5a5f8110%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639047563441853661%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=c4Fim5nuBV9O%2BfFTUltpoLTV19%2Fdy394PvzzGBxh8I4%3D&reserved=0
>>> git bisect good a954370fea56ee1bf995524255a34da7a1ddb524
>>> # good: [c7ec480f05dd0185a26f190471905ddf1215bc52] Merge branch 
>>> 'staging-next' of https://eur01.safelinks.protection.outlook.com/? 
>>> url=https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Fgregkh%2Fstaging.git&data=05%7C02%7Cchristophe.leroy2%40cs-soprasteria.com%7C441b227c282845cf2a3308de5a5f8110%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639047563441870081%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=xgtRCeDKj7BL1EXx%2BSEtCzR5gaN6wKfihyiwh0AFsRM%3D&reserved=0
>>> git bisect good c7ec480f05dd0185a26f190471905ddf1215bc52
>>> # good: [4427398fed2b8e07a62fd4f3f6fcf9ffcf56829a] Merge branch 'for- 
>>> next' of https://eur01.safelinks.protection.outlook.com/? 
>>> url=https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Flinusw%2Flinux-pinctrl.git&data=05%7C02%7Cchristophe.leroy2%40cs-soprasteria.com%7C441b227c282845cf2a3308de5a5f8110%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639047563441887814%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=AzoGH2fuDhFyYqK9JxlVZEsx3V7P5x8Yc8%2BuVE%2BBHJ4%3D&reserved=0
>>> git bisect good 4427398fed2b8e07a62fd4f3f6fcf9ffcf56829a
>>> # good: [852ccea1ca3144beb7003976d4fa04dbf81b307b] Merge branch 
>>> 'next' of https://eur01.safelinks.protection.outlook.com/? 
>>> url=https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Fmic%2Flinux.git&data=05%7C02%7Cchristophe.leroy2%40cs-soprasteria.com%7C441b227c282845cf2a3308de5a5f8110%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639047563441903764%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=%2BTtdFgkDy9QevJOIHlzjk7Jjd1390L6g0Nr5RpSTYp8%3D&reserved=0
>>> git bisect good 852ccea1ca3144beb7003976d4fa04dbf81b307b
>>> # good: [f174dabd307dfd92edacb34e8bee0384daa1bd2e] Merge branch 
>>> 'next' of https://eur01.safelinks.protection.outlook.com/? 
>>> url=https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Flenb%2Flinux.git&data=05%7C02%7Cchristophe.leroy2%40cs-soprasteria.com%7C441b227c282845cf2a3308de5a5f8110%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639047563441919983%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=%2BaVHILI%2FJcj%2BedPEPrJ1zFeSRGwuXUKb0VHFpZ%2Bp95s%3D&reserved=0
>>> git bisect good f174dabd307dfd92edacb34e8bee0384daa1bd2e
>>> # good: [e31f3c967c66cf03eecdf50fe138d05f635e3698] doc: Add 
>>> housekeeping documentation
>>> git bisect good e31f3c967c66cf03eecdf50fe138d05f635e3698
>>> # good: [0cc83fc23debf3e2df19c4510a77fe2d60ab2693] gpu: nova-core: 
>>> don't print raw PMU table entries
>>> git bisect good 0cc83fc23debf3e2df19c4510a77fe2d60ab2693
>>> # good: [75df6953fed6b7274f9c5080925ae4c8d3e424e6] Merge branch 'for- 
>>> next' of https://eur01.safelinks.protection.outlook.com/? 
>>> url=https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Ffrederic%2Flinux-dynticks.git&data=05%7C02%7Cchristophe.leroy2%40cs-soprasteria.com%7C441b227c282845cf2a3308de5a5f8110%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639047563441936107%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=beNKxNQCA6SYkfbETF9eJYQ7mBFWwCKUFce6cwNbHUA%3D&reserved=0
>>> git bisect good 75df6953fed6b7274f9c5080925ae4c8d3e424e6
>>> # good: [086714bbb96f63785da251e1f8d1ce3e716a6e42] Merge tag 'v6.19- 
>>> rc5' into drm-rust-next
>>> git bisect good 086714bbb96f63785da251e1f8d1ce3e716a6e42
>>> # good: [6ea52b6d8f33ae627f4dcf43b12b6e713a8b9331] drm/tyr: use 
>>> read_poll_timeout
>>> git bisect good 6ea52b6d8f33ae627f4dcf43b12b6e713a8b9331
>>> # good: [b956937ce78fae5fa785f6a95f291e2137502c5e] drm: tyr: Mark BROKEN
>>> git bisect good b956937ce78fae5fa785f6a95f291e2137502c5e
>>> # first bad commit: [a0c666c25aeefd16f4b088c6549a6fb6b65a8a1d] Add 
>>> linux-next specific files for 20260122
>>>
>>>
>>> If you happen to fix, this please add below tag.
>>>
>>>
>>> Reported-by: Venkat Rao Bagalkote <[email-masked]>
>> I don't think that bisection helps very much.
>>
>> Can you post the kernel config file?
>>
> 
> Attached is the .config file.
> 
> 
> GCC: gcc version 11.5.0 20240719 (Red Hat 11.5.0-2) (GCC)
> 
> ld: GNU ld version 2.35.2-54.el9
> 
> 
> Regards,
> 
> Venkat.