[PATCH] sched/pelt: Fix truncation of the PELT period count

[Hui Su <sh_def@163.com>]

accumulate_sum() computes the number of elapsed PELT periods in a
u64 but returns u32. When the count is a multiple of 2^32, it is
truncated to zero even though the PELT sums have been updated.

The caller interprets zero as no period boundary crossed and skips
recomputing the averages, leaving *_avg stale relative to *_sum.

Return only whether any period elapsed, which is all the caller
needs.

Signed-off-by: Hui Su <sh_def@163.com>
---
 kernel/sched/pelt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/pelt.c b/kernel/sched/pelt.c
index 779eb58a4261..519bc9c40043 100644
--- a/kernel/sched/pelt.c
+++ b/kernel/sched/pelt.c
@@ -146,7 +146,7 @@ accumulate_sum(u64 delta, struct sched_avg *sa,
 	if (running)
 		sa->util_sum += contrib << SCHED_CAPACITY_SHIFT;
 
-	return periods;
+	return !!periods;
 }
 
 /*
-- 
2.55.0