[PATCH net-next V2 1/2] sched/topology: Expose sched_numa_find_closest

Tariq Toukan
2022-07-18T12:43:45Z

This logic can help device drivers prefer some remote cpus
over others, according to the NUMA distance metrics.

Reviewed-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
include/linux/sched/topology.h | 2 ++
kernel/sched/topology.c | 1 +
2 files changed, 3 insertions(+)

v2:
Replaced EXPORT_SYMBOL with EXPORT_SYMBOL_GPL, per Peter's comment.

diff --git a/include/linux/sched/topology.h b/include/linux/sched/topology.h
index 56cffe42abbc..d467c30bdbb9 100644
--- a/include/linux/sched/topology.h
+++ b/include/linux/sched/topology.h
@@ -61,6 +61,8 @@ static inline int cpu_numa_flags(void)
{
return SD_NUMA;
}
+
+int sched_numa_find_closest(const struct cpumask *cpus, int cpu);
#endif

extern int arch_asym_cpu_priority(int cpu);
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 05b6c2ad90b9..274fb2bd3849 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -2066,6 +2066,7 @@ int sched_numa_find_closest(const struct cpumask *cpus, int cpu)

return found;
}
+EXPORT_SYMBOL_GPL(sched_numa_find_closest);

#endif /* CONFIG_NUMA */

--
2.21.0