If CONFIG_PM_SLEEP is not set, make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-, will be failed, like this: drivers/pci/controller/dwc/pci-imx6.c:973:13: error: ‘imx6_pcie_host_exit’ defined but not used [-Werror=unused-function] static void imx6_pcie_host_exit(struct dw_pcie_rp *pp) ^~~~~~~~~~~~~~~~~~~ drivers/pci/controller/dwc/pci-imx6.c:904:13: error: ‘imx6_pcie_stop_link’ defined but not used [-Werror=unused-function] static void imx6_pcie_stop_link(struct dw_pcie *pci) ^~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors make[4]: *** [drivers/pci/controller/dwc/pci-imx6.o] Error 1 These two functions imx6_pcie_host_exit() and imx6_pcie_stop_link() only be called by imx6_pcie_suspend_noirq(), which was warpped by CONFIG_PM_SLEEP. To fix build error unused-function, use __maybe_unused to attach them. Fixes: 25ae5434c3de ("PCI: imx6: Reformat suspend callback to keep symmetric with resume") Signed-off-by: Ren Zhijie <renzhijie2@xxxxxxxxxx> --- drivers/pci/controller/dwc/pci-imx6.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 55e109d1ab27..533f5ef68e94 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -901,7 +901,7 @@ static int imx6_pcie_start_link(struct dw_pcie *pci) return 0; } -static void imx6_pcie_stop_link(struct dw_pcie *pci) +static void __maybe_unused imx6_pcie_stop_link(struct dw_pcie *pci) { struct device *dev = pci->dev; @@ -970,7 +970,7 @@ static int imx6_pcie_host_init(struct dw_pcie_rp *pp) return ret; } -static void imx6_pcie_host_exit(struct dw_pcie_rp *pp) +static void __maybe_unused imx6_pcie_host_exit(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct imx6_pcie *imx6_pcie = to_imx6_pcie(pci); -- 2.17.1