[PATCH v2 5/7] soc: samsung: exynos-pmu: add Exynos850 CPU hotplug support

[Alexey Klimov]

Hi Henrik,

On Thu Apr 9, 2026 at 12:57 PM BST, Henrik Grimler wrote:
> Hi Alexey,
>
> This patch breaks compilation for arm(32) exynos devices. Compiling
> with exynos_defconfig I get:
>
> [ ... ]
>   CC      drivers/soc/samsung/exynos850-pmu.o
>   CC [M]  fs/squashfs/page_actor.o
> ../drivers/soc/samsung/exynos850-pmu.c:17:21: error: call to undeclared function 'MPIDR_AFFINITY_LEVEL'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>    17 |         u32 this_cluster = MPIDR_AFFINITY_LEVEL(read_cpuid_mpidr(), 2);
>       |                            ^
> ../drivers/soc/samsung/exynos850-pmu.c:17:42: error: call to undeclared function 'read_cpuid_mpidr'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>    17 |         u32 this_cluster = MPIDR_AFFINITY_LEVEL(read_cpuid_mpidr(), 2);
>       |                                                 ^
> ../drivers/soc/samsung/exynos850-pmu.c:48:21: error: call to undeclared function 'MPIDR_AFFINITY_LEVEL'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>    48 |         u32 this_cluster = MPIDR_AFFINITY_LEVEL(read_cpuid_mpidr(), 2);
>       |                            ^
> ../drivers/soc/samsung/exynos850-pmu.c:48:42: error: call to undeclared function 'read_cpuid_mpidr'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>    48 |         u32 this_cluster = MPIDR_AFFINITY_LEVEL(read_cpuid_mpidr(), 2);
>       |                                                 ^
> 4 errors generated.
> make[6]: *** [../scripts/Makefile.build:289: drivers/soc/samsung/exynos850-pmu.o] Error 1
> make[5]: *** [../scripts/Makefile.build:548: drivers/soc/samsung] Error 2
> make[4]: *** [../scripts/Makefile.build:548: drivers/soc] Error 2
> make[3]: *** [../scripts/Makefile.build:548: drivers] Error 2
> make[3]: *** Waiting for unfinished jobs....
> [ ... ]

Thank you! My bad.
I will check for the next series what I missed.

Thanks,
Alexey