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Subject[tip: sched/core] sched/topology: Remove unused numa_distance in cpu_attach_domain()
The following commit has been merged into the sched/core branch of tip:

Commit-ID: f43df9225fcad9b07a4ef4d0fe4c3ad2fb4ce82d
Gitweb: https://git.kernel.org/tip/f43df9225fcad9b07a4ef4d0fe4c3ad2fb4ce82d
Author: Yicong Yang <yangyicong@hisilicon.com>
AuthorDate: Wed, 15 Sep 2021 14:31:58 +08:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Thu, 07 Oct 2021 13:51:17 +02:00

sched/topology: Remove unused numa_distance in cpu_attach_domain()

numa_distance in cpu_attach_domain() is introduced in
commit b5b217346de8 ("sched/topology: Warn when NUMA diameter > 2")
to warn user when NUMA diameter > 2 as we'll misrepresent
the scheduler topology structures at that time. This is
fixed by Barry in commit 585b6d2723dc ("sched/topology: fix the issue
groups don't span domain->span for NUMA diameter > 2") and
numa_distance is unused now. So remove it.

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Barry Song <baohua@kernel.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Link: https://lore.kernel.org/r/20210915063158.80639-1-yangyicong@hisilicon.com
---
kernel/sched/topology.c | 4 ----
1 file changed, 4 deletions(-)

diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index c56faae..5af3edd 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -688,7 +688,6 @@ cpu_attach_domain(struct sched_domain *sd, struct root_domain *rd, int cpu)
{
struct rq *rq = cpu_rq(cpu);
struct sched_domain *tmp;
- int numa_distance = 0;

/* Remove the sched domains which do not contribute to scheduling. */
for (tmp = sd; tmp; ) {
@@ -732,9 +731,6 @@ cpu_attach_domain(struct sched_domain *sd, struct root_domain *rd, int cpu)
}
}

- for (tmp = sd; tmp; tmp = tmp->parent)
- numa_distance += !!(tmp->flags & SD_NUMA);
-
sched_domain_debug(sd, cpu);

rq_attach_root(rq, rd);
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