If CONFIG_PM_SLEEP is n, build fails: drivers/clk/tegra/clk-tegra210.c:3426:13: error: tegra210_clk_suspend undeclared here (not in a function); did you mean tegra_clk_ndspeed? .suspend = tegra210_clk_suspend, ^~~~~~~~~~~~~~~~~~~~ tegra_clk_ndspeed drivers/clk/tegra/clk-tegra210.c:3427:12: error: tegra210_clk_resume undeclared here (not in a function); did you mean tegra210_clk_suspend? .resume = tegra210_clk_resume, Use ifdef to guard this. Reported-by: Hulk Robot <hulkci@xxxxxxxxxx> Fixes: 27d10d548c04 ("clk: tegra: Add suspend and resume support on Tegra210") Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx> --- drivers/clk/tegra/clk-tegra210.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c index d038fed..762cd18 100644 --- a/drivers/clk/tegra/clk-tegra210.c +++ b/drivers/clk/tegra/clk-tegra210.c @@ -3423,8 +3423,10 @@ static void tegra210_cpu_clock_resume(void) #endif static struct syscore_ops tegra_clk_syscore_ops = { +#ifdef CONFIG_PM_SLEEP .suspend = tegra210_clk_suspend, .resume = tegra210_clk_resume, +#endif }; static struct tegra_cpu_car_ops tegra210_cpu_car_ops = { -- 2.7.4