diff options
| author | Quentin Perret <quentin.perret@arm.com> | 2018-12-03 09:56:22 +0000 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-12-11 15:17:01 +0100 |
| commit | 1f74de8798c93ce14801cc4e772603e51c841c33 (patch) | |
| tree | d554cb139988c18fc849f4789c68404965e5b746 /kernel/sched/sched.h | |
| parent | 531b5c9f5cd05ead53324f419b32685a22eebe8b (diff) | |
| download | linux-next-1f74de8798c93ce14801cc4e772603e51c841c33.tar.gz | |
sched/toplogy: Introduce the 'sched_energy_present' static key
In order to make sure Energy Aware Scheduling (EAS) will not impact
systems where no Energy Model is available, introduce a static key
guarding the access to EAS code. Since EAS is enabled on a
per-root-domain basis, the static key is enabled when at least one root
domain meets all conditions for EAS.
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: adharmap@codeaurora.org
Cc: chris.redpath@arm.com
Cc: currojerez@riseup.net
Cc: dietmar.eggemann@arm.com
Cc: edubezval@gmail.com
Cc: gregkh@linuxfoundation.org
Cc: javi.merino@kernel.org
Cc: joel@joelfernandes.org
Cc: juri.lelli@redhat.com
Cc: morten.rasmussen@arm.com
Cc: patrick.bellasi@arm.com
Cc: pkondeti@codeaurora.org
Cc: rjw@rjwysocki.net
Cc: skannan@codeaurora.org
Cc: smuckle@google.com
Cc: srinivas.pandruvada@linux.intel.com
Cc: thara.gopinath@linaro.org
Cc: tkjos@google.com
Cc: valentin.schneider@arm.com
Cc: vincent.guittot@linaro.org
Cc: viresh.kumar@linaro.org
Link: https://lkml.kernel.org/r/20181203095628.11858-10-quentin.perret@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index fd84900b0b21..2b3cf356e958 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -2296,3 +2296,7 @@ unsigned long scale_irq_capacity(unsigned long util, unsigned long irq, unsigned #else #define perf_domain_span(pd) NULL #endif + +#ifdef CONFIG_SMP +extern struct static_key_false sched_energy_present; +#endif |