[Patch net v2 2/2] lwt_bpf: replace preempt_disable() with migrate_disable()

[Cong Wang]

From: Cong Wang <cong.w...@bytedance.com>

migrate_disable() is just a wrapper for preempt_disable() in
non-RT kernel. It is safe to replace it, and RT kernel will
benefit.

Note that it is introduced since Feb 2020.

Suggested-by: Alexei Starovoitov <alexei.starovoi...@gmail.com>
Signed-off-by: Cong Wang <cong.w...@bytedance.com>
---
 net/core/lwt_bpf.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/core/lwt_bpf.c b/net/core/lwt_bpf.c
index 4f3cb7c15ddf..2f7940bcf715 100644
--- a/net/core/lwt_bpf.c
+++ b/net/core/lwt_bpf.c
@@ -39,10 +39,10 @@ static int run_lwt_bpf(struct sk_buff *skb, struct 
bpf_lwt_prog *lwt,
 {
        int ret;
 
-       /* Preempt disable and BH disable are needed to protect per-cpu
+       /* Migration disable and BH disable are needed to protect per-cpu
         * redirect_info between BPF prog and skb_do_redirect().
         */
-       preempt_disable();
+       migrate_disable();
        local_bh_disable();
        bpf_compute_data_pointers(skb);
        ret = bpf_prog_run_save_cb(lwt->prog, skb);
@@ -78,7 +78,7 @@ static int run_lwt_bpf(struct sk_buff *skb, struct 
bpf_lwt_prog *lwt,
        }
 
        local_bh_enable();
-       preempt_enable();
+       migrate_enable();
 
        return ret;
 }
-- 
2.25.1