sched_ext: Return NULL in llc_span

EricccTaiwan · htejun · commit f479fee3827a · 2025-06-16T07:32:37.000-10:00
Use NULL instead of 0 to signal no LLC domain, matching numa_span() and
the function comment.

No functional change.

Signed-off-by: Cheng-Yang Chou &lt;yphbchou0911@gmail.com&gt;
Signed-off-by: Tejun Heo &lt;tj@kernel.org&gt;
diff --git a/kernel/sched/ext_idle.c b/kernel/sched/ext_idle.c
@@ -249,7 +249,7 @@ static struct cpumask *llc_span(s32 cpu)
 
 	sd = rcu_dereference(per_cpu(sd_llc, cpu));
 	if (!sd)
-		return 0;
+		return NULL;
 
 	return sched_domain_span(sd);
 }

Original file line number	Diff line number	Diff line change
`@@ -249,7 +249,7 @@ static struct cpumask *llc_span(s32 cpu)`
`249`	`249`
`250`	`250`	`sd = rcu_dereference(per_cpu(sd_llc, cpu));`
`251`	`251`	`if (!sd)`
`252`		`- return 0;`
	`252`	`+ return NULL;`
`253`	`253`
`254`	`254`	`return sched_domain_span(sd);`
`255`	`255`	`}`