There is no functionality change. This refactoring intends
to facilitate next patch change with BPF_PSEUDO_FUNC.

Signed-off-by: Yonghong Song <redacted>
---
 kernel/bpf/verifier.c | 29 +++++++++++++----------------
 1 file changed, 13 insertions(+), 16 deletions(-)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 5e09632efddb..db294b75d03b 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c

@@ -228,6 +228,12 @@ static void bpf_map_key_store(struct bpf_insn_aux_data *aux, u64 state)
 			     (poisoned ? BPF_MAP_KEY_POISON : 0ULL);
 }
 
+static bool bpf_pseudo_call(const struct bpf_insn *insn)
+{
+	return insn->code == (BPF_JMP | BPF_CALL) &&
+	       insn->src_reg == BPF_PSEUDO_CALL;
+}
+
 struct bpf_call_arg_meta {
 	struct bpf_map *map_ptr;
 	bool raw_mode;

@@ -1486,9 +1492,7 @@ static int check_subprogs(struct bpf_verifier_env *env)
 
 	/* determine subprog starts. The end is one before the next starts */
 	for (i = 0; i < insn_cnt; i++) {
-		if (insn[i].code != (BPF_JMP | BPF_CALL))
-			continue;
-		if (insn[i].src_reg != BPF_PSEUDO_CALL)
+		if (!bpf_pseudo_call(insn + i))