On Tue, Aug 19, 2025 at 03:07:56PM +0530, Naresh Kamboju wrote:

Hi Naresh,

Build regressions were detected on the s390 architecture with the Linux next-20250813 tag when building with the allyesconfig configuration.

The failure is caused by unresolved symbol references to stmmac_simple_pm_ops in multiple STMMAC driver object files, resulting in a link error during vmlinux generation.

First seen on next-20250813 Good: next-20250812 Bad: next-20250813 and next-20250819

Regression Analysis:

• New regression? yes
• Reproducibility? yes

• s390, build
  • gcc-13-allyesconfig

Boot regression: next-20250813 s390 allyesconfig undefined reference to `stmmac_simple_pm_ops'

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

## Build log s390x-linux-gnu-ld: drivers/net/ethernet/stmicro/stmmac/dwmac-rk.o:(.data.rel+0xa0): undefined reference to `stmmac_simple_pm_ops' s390x-linux-gnu-ld: drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.o:(.data.rel+0xa0): undefined reference to `stmmac_simple_pm_ops' s390x-linux-gnu-ld: drivers/net/ethernet/stmicro/stmmac/stmmac_pci.o:(.data.rel+0xe0): undefined reference to `stmmac_simple_pm_ops' s390x-linux-gnu-ld: drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.o:(.data.rel+0xe0): undefined reference to `stmmac_simple_pm_ops' make[3]: *** [/scripts/Makefile.vmlinux:91: vmlinux.unstripped] Error 1

## Source

• Kernel version: 6.17.0-rc2
• Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git
• Git describe: next-20250818
• Git commit: 3ac864c2d9bb8608ee236e89bf561811613abfce
• Architectures: s390
• Toolchains: gcc-13
• Kconfigs: allyesconfig

## Build

• Build log: https://qa-reports.linaro.org/api/testruns/29579401/log_file/
• Build details:

https://regressions.linaro.org/lkft/linux-next-master/next-20250818/build/gc...

• Build plan: https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/builds/31RcVYdjsd...
• Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/31RcVYdjsdhroYxXs4TJY...
• Kernel config:

https://storage.tuxsuite.com/public/linaro/lkft/builds/31RcVYdjsdhroYxXs4TJY...

I guess it boils down to these commits:

0a529da8cfe3 Merge branch 'net-stmmac-improbe-suspend-resume-architecture' d6e1f2272960 net: stmmac: mediatek: convert to resume() method c7308b2f3d0d net: stmmac: stm32: convert to suspend()/resume() methods d7a276a5768f net: stmmac: rk: convert to suspend()/resume() methods c91918a1e976 net: stmmac: pci: convert to suspend()/resume() methods 38772638d6d1 net: stmmac: loongson: convert to suspend()/resume() methods 062b42801733 net: stmmac: intel: convert to suspend()/resume() methods b51f34bc85e3 net: stmmac: platform: legacy hooks for suspend()/resume() methods 7e84b3fae58c net: stmmac: provide a set of simple PM ops 07bbbfe7addf net: stmmac: add suspend()/resume() platform ops

CONFIG_PM is not defined on s390 and as result stmmac_simple_pm_ops ends up in _DISCARD_PM_OPS(). The below patch fixes the linking, but it is by no means a correct solution:

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c index 5769165ee5ba..d475a77e4871 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c @@ -668,7 +668,7 @@ static struct pci_driver loongson_dwmac_driver = { .probe = loongson_dwmac_probe, .remove = loongson_dwmac_remove, .driver = { - .pm = &stmmac_simple_pm_ops, + .pm = &__static_stmmac_simple_pm_ops, }, };

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c index ac8288301994..69fcc8f10ccc 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c @@ -1820,7 +1820,7 @@ static struct platform_driver rk_gmac_dwmac_driver = { .remove = rk_gmac_remove, .driver = { .name = "rk_gmac-dwmac", - .pm = &stmmac_simple_pm_ops, + .pm = &__static_stmmac_simple_pm_ops, .of_match_table = rk_gmac_dwmac_match, }, }; diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c index 77a04c4579c9..d3e1eb35b231 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c @@ -669,7 +669,7 @@ static struct platform_driver stm32_dwmac_driver = { .remove = stm32_dwmac_remove, .driver = { .name = "stm32-dwmac", - .pm = &stmmac_simple_pm_ops, + .pm = &__static_stmmac_simple_pm_ops, .of_match_table = stm32_dwmac_match, }, }; diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index bf95f03dd33f..c5554ede0ba4 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -375,6 +375,7 @@ enum stmmac_state { };

extern const struct dev_pm_ops stmmac_simple_pm_ops; +extern const struct dev_pm_ops __static_stmmac_simple_pm_ops;

int stmmac_mdio_unregister(struct net_device *ndev); int stmmac_mdio_register(struct net_device *ndev); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c index e6a7d0ddac2a..d1710f26d65a 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c @@ -286,7 +286,7 @@ static struct pci_driver stmmac_pci_driver = { .probe = stmmac_pci_probe, .remove = stmmac_pci_remove, .driver = { - .pm = &stmmac_simple_pm_ops, + .pm = &__static_stmmac_simple_pm_ops, }, };

diff --git a/include/linux/pm.h b/include/linux/pm.h index cc7b2dc28574..05524761fd51 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -381,7 +381,7 @@ const struct dev_pm_ops name = { \ const struct dev_pm_ops name

#define _DISCARD_PM_OPS(name, license, ns) \ - static __maybe_unused const struct dev_pm_ops __static_##name + __maybe_unused const struct dev_pm_ops __static_##name

#ifdef CONFIG_PM #define _EXPORT_DEV_PM_OPS(name, license, ns) _EXPORT_PM_OPS(name, license, ns)

-- Linaro LKFT https://lkft.linaro.org