Quoting Arnd Bergmann (2018-12-11 06:35:07) > When CONFIG_SMP is disabled, the tegra clk driver now fails to build: > > drivers/clk/tegra/clk-tegra30.c: In function 'tegra30_cpu_rail_off_ready': > drivers/clk/tegra/clk-tegra30.c:1151:19: error: implicit declaration of function 'tegra_pmc_cpu_is_powered'; did you mean 'tegra_powergate_is_powered'? [-Werror=implicit-function-declaration] > cpu_pwr_status = tegra_pmc_cpu_is_powered(1) || > > I don't know if tegra works without CONFIG_SMP, but we can get it to > build by making the calls conditional, and removing the pointless > ifdef around the declaration. The assumption now is that in a > non-SMP system, the secondary CPUs are always disabled. > > Fixes: 61866523ed6e ("clk: tegra30: Use Tegra CPU powergate helper function") > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> > --- > Not sure if this is the best solution. If you think it's not, please > submit a different fix. Hmm.. Is there any reason why the implementation of tegra_pmc_cpu_is_powered() is under an ifdef CONFIG_SMP? I'd rather not have to think about SMP or not in this clk code and have the tegra_pmc_cpu_is_powered() function do the UP vs SMP code optimization.