There is one compilation error when CONFIG_INTERCONNECT_QCOM_QCS404=y and CONFIG_INTERCONNECT_QCOM_SMD_RPM=y, as well as CONFIG_COMPILE_TEST=y, but CONFIG_QCOM_SMD_RPM is not set, logs as below: drivers/interconnect/qcom/smd-rpm.o: In function `qcom_icc_rpm_smd_send': smd-rpm.c:(.text+0xe4): undefined reference to `qcom_rpm_smd_write' Makefile:1071: recipe for target 'vmlinux' failed make: *** [vmlinux] Error 1 This is because INTERCONNECT_QCOM_QCS404 depends on QCOM_SMD_RPM || COMPILE_TEST. Here CONFIG_COMPILE_TEST=y, so CONFIG_INTERCONNECT_QCOM_SMD_RPM is selected. If CONFIG_QCOM_SMD_RPM is not set, then qcom_rpm_smd_write() is not defined, and compilation error happen. Fix this by removing COMPILE_TEST from CONFIG_INTERCONNECT_QCOM_QCS404. Fixes: 5e4e6c4d3ae0 ("interconnect: qcom: Add QCS404 interconnect provider driver") Signed-off-by: Mao Wenan <maowenan@xxxxxxxxxx> --- drivers/interconnect/qcom/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/interconnect/qcom/Kconfig b/drivers/interconnect/qcom/Kconfig index 339e8f1..6ab4012 100644 --- a/drivers/interconnect/qcom/Kconfig +++ b/drivers/interconnect/qcom/Kconfig @@ -8,7 +8,7 @@ config INTERCONNECT_QCOM config INTERCONNECT_QCOM_QCS404 tristate "Qualcomm QCS404 interconnect driver" depends on INTERCONNECT_QCOM - depends on QCOM_SMD_RPM || COMPILE_TEST + depends on QCOM_SMD_RPM select INTERCONNECT_QCOM_SMD_RPM help This is a driver for the Qualcomm Network-on-Chip on qcs404-based -- 2.7.4