Re: [Question] sched: rt.c: kernel-doc warning

[K Prateek Nayak]

Hello Manuel,

On 10/5/2026 12:57 PM, Manuel Ebner wrote:
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> 
> Hi,
> 
> I'm trying to fix built warning and stumbled over this one:
> 
> $make W=1 -j8 > make_output.txt
> In file included from kernel/sched/build_policy.c:52:
> kernel/sched/rt.c:12:18: warning: ‘max_rt_runtime’ defined but not used [-Wunused-const-variable=]
>    12 | static const u64 max_rt_runtime = MAX_BW;
>       |                  ^~~~~~~~~~~~~~
> 
> I just can't make sense of this, because max_rt_runtime is used later in the
> file - see diff.
> What am I missing?

Any chance you have both CONFIG_RT_GROUP_SCHED and CONFIG_SYSCTL
disabled in your .config?

In that case, max_rt_runtime is never used by anything that gets
built in and the compiler complains. You can annotate it with
__maybe_unused to keep the build happy in those cases.

-- 
Thanks and Regards,
Prateek