Re: [thomas-weissschuh:b4/b4-sysfs-const-attr-device_attr] BUILD REGRESSION f45ad0a3230a0f2acba54b0bd76d897a9b68f4da

Hi Oliver and the LKP team,

On 2026-04-06 15:27:22+0800, kernel test robot wrote:
> tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git b4/b4-sysfs-const-attr-device_attr
> branch HEAD: f45ad0a3230a0f2acba54b0bd76d897a9b68f4da  uncore
> 
> Error/Warning (recently discovered and may have been fixed):
> 
>     https://lore.kernel.org/oe-kbuild-all/[email protected]
>     https://lore.kernel.org/oe-kbuild-all/[email protected]

These links don't seem to work. I am specifically interested in the
reproducer for "initialized field overwritten".

And thanks again for your service!


Thomas

>     arch/powerpc/perf/hv-24x7.c:464:18: error: assignment to 'ssize_t (*)(struct device *, struct device_attribute *, char *)' {aka 'long int (*)(struct device *, struct device_attribute *, char *)'} from incompatible pointer type 'ssize_t (*)(struct device *, const struct device_attribute *, char *)' {aka 'long int (*)(struct device *, const struct device_attribute *, char *)'} [-Werror=incompatible-pointer-types]
>     arch/powerpc/perf/hv-24x7.c:464:25: error: assignment to 'ssize_t (*)(struct device *, struct device_attribute *, char *)' {aka 'long int (*)(struct device *, struct device_attribute *, char *)'} from incompatible pointer type 'ssize_t (*)(struct device *, const struct device_attribute *, char *)' {aka 'long int (*)(struct device *, const struct device_attribute *, char *)'} [-Wincompatible-pointer-types]
>     include/linux/device.h:157:27: error: initialized field overwritten [-Werror=override-init]
>     include/linux/device.h:161:27: error: initialized field overwritten [-Werror=override-init]
> 
> Error/Warning ids grouped by kconfigs:
> 
> recent_errors
> |-- i386-randconfig-002-20260405
> |   `-- include-linux-device.h:error:initialized-field-overwritten
> |-- i386-randconfig-051-20260406
> |   `-- include-linux-device.h:error:initialized-field-overwritten
> |-- powerpc-allmodconfig
> |   `-- arch-powerpc-perf-hv-24x7.c:error:assignment-to-ssize_t-(-)(struct-device-struct-device_attribute-char-)-aka-long-int-(-)(struct-device-struct-device_attribute-char-)-from-incompatible-pointer-type-ss
> |-- powerpc64-randconfig-r053-20260405
> |   `-- arch-powerpc-perf-hv-24x7.c:error:assignment-to-ssize_t-(-)(struct-device-struct-device_attribute-char-)-aka-long-int-(-)(struct-device-struct-device_attribute-char-)-from-incompatible-pointer-type-ss
> `-- x86_64-randconfig-103-20260405
>     `-- include-linux-device.h:error:initialized-field-overwritten

(...)