sched_ext: Return NULL in llc_span

auldp · auldp · commit b583abfe822e · 2025-09-25T18:06:37.000Z
JIRA: https://issues.redhat.com/browse/RHEL-111810 commit f479fee Author: Cheng-Yang Chou <yphbchou0911@gmail.com> Date: Mon Jun 16 04:04:14 2025 +0800 sched_ext: Return NULL in llc_span 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 <yphbchou0911@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Phil Auld <pauld@redhat.com>
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`	`}`