If CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT is not set, the dummy version of the function should be static. Fixes: 1e2c3f0f1e93 ("ACPI: PM: Make acpi_sleep_state_supported() non-static") Signed-off-by: Dexuan Cui <decui@xxxxxxxxxxxxx> Reported-by: kbuild test robot <lkp@xxxxxxxxx> --- Sorry for not doing it right in the previous patch! The patch fixes the build errors on ARM64: drivers/net/ethernet/qualcomm/emac/emac-phy.o: In function `acpi_sleep_state_supported': >> emac-phy.c:(.text+0x1d8): multiple definition of `acpi_sleep_state_supported' drivers/net/ethernet/qualcomm/emac/emac.o:emac.c:(.text+0xbf8): first defined here drivers/net/ethernet/qualcomm/emac/emac-sgmii.o: In function `acpi_sleep_state_supported': emac-sgmii.c:(.text+0x548): multiple definition of `acpi_sleep_state_supported' drivers/net/ethernet/qualcomm/emac/emac.o:emac.c:(.text+0xbf8): first defined here include/acpi/acpi_bus.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 4ce59bdc852e..8ffc4acf2b56 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -657,7 +657,7 @@ static inline int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable) #ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT bool acpi_sleep_state_supported(u8 sleep_state); #else -bool acpi_sleep_state_supported(u8 sleep_state) { return false; } +static bool acpi_sleep_state_supported(u8 sleep_state) { return false; } #endif #ifdef CONFIG_ACPI_SLEEP -- 2.17.1