Compiling without CONFIG_ARM_AMBA causes undefined reference errors: ld: vmlinux.o: in function `nmk_rng_remove': nomadik-rng.c:(.text+0x6f64917): undefined reference to `amba_release_regions' ld: vmlinux.o: in function `nmk_rng_probe': nomadik-rng.c:(.text+0x6f649ee): undefined reference to `amba_request_regions' nomadik-rng.c:(.text+0x6f64aba): undefined reference to `amba_release_regions' nomadik-rng.c:(.text+0x6f64ae0): undefined reference to `amba_release_regions' The Nomadik RNG driver uses AMBA bus interfaces (amba_request_regions/amba_release_regions) which are only available when CONFIG_ARM_AMBA is enabled. The existing dependency on ARCH_NOMADIK implicitly selects ARM_AMBA, but when building with COMPILE_TEST on non-ARM platforms, this dependency breaks. Fix by explicitly adding dependency on ARM_AMBA to Kconfig, ensuring the driver only compiles when AMBA support is available. Signed-off-by: Chunsheng Luo <luochunsheng@xxxxxxxx> --- drivers/char/hw_random/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig index c85827843447..09abd1acb99f 100644 --- a/drivers/char/hw_random/Kconfig +++ b/drivers/char/hw_random/Kconfig @@ -311,7 +311,7 @@ config HW_RANDOM_INGENIC_TRNG config HW_RANDOM_NOMADIK tristate "ST-Ericsson Nomadik Random Number Generator support" - depends on ARCH_NOMADIK || COMPILE_TEST + depends on ARM_AMBA && (ARCH_NOMADIK || COMPILE_TEST) default HW_RANDOM help This driver provides kernel-side support for the Random Number -- 2.43.0
