[PATCH sched_ext/for-7.3] sched_ext: Move the config-off sub-cap kfunc stubs into sub.c

The EOPNOTSUPP stubs for the sub-cap kfuncs live in ext.c under #ifndef
CONFIG_EXT_SUB_SCHED while the real definitions live in sub.c. Move the
stubs into sub.c so all sub kfunc definitions live in one file. Pure code
move, no functional change.

Signed-off-by: Tejun Heo <[email protected]>
---
 kernel/sched/ext/ext.c |   29 -----------------------------
 kernel/sched/ext/sub.c |   33 +++++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 29 deletions(-)

--- a/kernel/sched/ext/ext.c
+++ b/kernel/sched/ext/ext.c
@@ -10682,35 +10682,6 @@ out:
 }
 #endif	/* CONFIG_CGROUP_SCHED */
 
-#ifndef CONFIG_EXT_SUB_SCHED
-__bpf_kfunc s32 scx_bpf_sub_grant(u64 cgroup_id, u64 caps,
-				  const struct scx_cmask *cmask__ign,
-				  struct scx_cmask *denied_out__ign,
-				  const struct bpf_prog_aux *aux)
-{
-	return -EOPNOTSUPP;
-}
-
-__bpf_kfunc void scx_bpf_sub_revoke(u64 cgroup_id, u64 caps,
-				    const struct scx_cmask *cmask__ign,
-				    const struct bpf_prog_aux *aux)
-{
-}
-
-__bpf_kfunc s32 scx_bpf_sub_caps(u64 cgroup_id, u64 caps, struct scx_cmask *out__ign,
-				 const struct bpf_prog_aux *aux)
-{
-	return -EOPNOTSUPP;
-}
-
-__bpf_kfunc s32 scx_bpf_sub_kill_bstr(u64 cgroup_id, char *fmt,
-				      unsigned long long *data, u32 data__sz,
-				      const struct bpf_prog_aux *aux)
-{
-	return -EOPNOTSUPP;
-}
-#endif	/* !CONFIG_EXT_SUB_SCHED */
-
 __bpf_kfunc_end_defs();
 
 BTF_KFUNCS_START(scx_kfunc_ids_any)
--- a/kernel/sched/ext/sub.c
+++ b/kernel/sched/ext/sub.c
@@ -2648,4 +2648,37 @@ __bpf_kfunc s32 scx_bpf_sub_kill_bstr(u6
 
 __bpf_kfunc_end_defs();
 
+#else	/* !CONFIG_EXT_SUB_SCHED */
+
+__bpf_kfunc_start_defs();
+
+__bpf_kfunc s32 scx_bpf_sub_grant(u64 cgroup_id, u64 caps,
+				  const struct scx_cmask *cmask__ign,
+				  struct scx_cmask *denied_out__ign,
+				  const struct bpf_prog_aux *aux)
+{
+	return -EOPNOTSUPP;
+}
+
+__bpf_kfunc void scx_bpf_sub_revoke(u64 cgroup_id, u64 caps,
+				    const struct scx_cmask *cmask__ign,
+				    const struct bpf_prog_aux *aux)
+{
+}
+
+__bpf_kfunc s32 scx_bpf_sub_caps(u64 cgroup_id, u64 caps, struct scx_cmask *out__ign,
+				 const struct bpf_prog_aux *aux)
+{
+	return -EOPNOTSUPP;
+}
+
+__bpf_kfunc s32 scx_bpf_sub_kill_bstr(u64 cgroup_id, char *fmt,
+				      unsigned long long *data, u32 data__sz,
+				      const struct bpf_prog_aux *aux)
+{
+	return -EOPNOTSUPP;
+}
+
+__bpf_kfunc_end_defs();
+
 #endif	/* CONFIG_EXT_SUB_SCHED */