On 25/08/20 09:26, Andy Shevchenko wrote: > On Mon, Aug 24, 2020 at 06:09:41PM +0100, Valentin Schneider wrote: >> On 24/08/20 16:39, Andy Shevchenko wrote: >> > Compilation of almost each file ends up with >> > >> > In file included from .../include/linux/energy_model.h:10, >> > from .../include/linux/device.h:16, >> > from .../drivers/spi/spi.c:8: >> > .../include/linux/sched/topology.h:30:27: warning: >> > ‘SD_DEGENERATE_GROUPS_MASK’ defined but not used [-Wunused-const-variable=] >> > 30 | static const unsigned int SD_DEGENERATE_GROUPS_MASK = >> > | ^~~~~~~~~~~~~~~~~~~~~~~~~ >> > ... >> > >> > Make compiler happy by annotating the static constants with >> > __maybwe_unused. >> > >> >> That should see some use as long as the build is for SMP. This whole region >> is guarded by #ifdef CONFIG_SMP, so an !SMP build shouldn't trigger this. > > Isn't SMP is default for most of the kernel builds? > And honestly I didn't get the purpose of this comment. >
Sorry, that's what I get for trying to be too succinct; what I tried to say was that SD_DEGENERATE_GROUPS_MASK should very much be used for SMP. If the build is !SMP, it shouldn't even be defined, IOW I'm perplexed as to where this is coming from. >> With what config/kernel are you getting this? > > x86_64_defconfig from the kernel sources with some drivers added (SMP or so > has > not been touched, DEBUG_SHED was enabled once to confirm that another static > const has same issue). Thanks, I'll poke around this.
