Refactor sk_user_data dereference using more generic function
__rcu_dereference_sk_user_data_with_flags(), which improve its
maintainability
Suggested-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Hawkins Jiawei <yin31149@xxxxxxxxx>
---
kernel/bpf/reuseport_array.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/kernel/bpf/reuseport_array.c b/kernel/bpf/reuseport_array.c
index e2618fb5870e..85fa9dbfa8bf 100644
--- a/kernel/bpf/reuseport_array.c
+++ b/kernel/bpf/reuseport_array.c
@@ -21,14 +21,11 @@ static struct reuseport_array *reuseport_array(struct bpf_map *map)
/* The caller must hold the reuseport_lock */
void bpf_sk_reuseport_detach(struct sock *sk)
{
- uintptr_t sk_user_data;
+ struct sock __rcu **socks;
write_lock_bh(&sk->sk_callback_lock);
- sk_user_data = (uintptr_t)sk->sk_user_data;
- if (sk_user_data & SK_USER_DATA_BPF) {
- struct sock __rcu **socks;
-
- socks = (void *)(sk_user_data & SK_USER_DATA_PTRMASK);
+ socks = __rcu_dereference_sk_user_data_with_flags(sk, SK_USER_DATA_BPF);
+ if (socks) {
WRITE_ONCE(sk->sk_user_data, NULL);
/*
* Do not move this NULL assignment outside of
--
2.25.1
