[PATCH net-next] net/netif_receive_skb_core: Use migrate_disable()

The preempt disable around do_xdp_generic() has been introduced in
commit
   bbbe211c295ff ("net: rcu lock and preempt disable missing around generic xdp")

For BPF it is enough to use migrate_disable() and the code was updated
as it can be seen in commit
   3c58482a382ba ("bpf: Provide bpf_prog_run_pin_on_cpu() helper")

This is a leftover which was not converted.

Use migrate_disable() before invoking do_xdp_generic().

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 net/core/dev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 50531a2d0b20d..e597371281638 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c

@@ -5277,9 +5277,9 @@ static int __netif_receive_skb_core(struct sk_buff **pskb, bool pfmemalloc,
 	if (static_branch_unlikely(&generic_xdp_needed_key)) {
 		int ret2;
 
-		preempt_disable();
+		migrate_disable();
 		ret2 = do_xdp_generic(rcu_dereference(skb->dev->xdp_prog), skb);
-		preempt_enable();
+		migrate_enable();
 
 		if (ret2 != XDP_PASS) {
 			ret = NET_RX_DROP;

-- 
2.32.0

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Thu, 17 Jun 2021 09:38:17 +0200 you wrote:

The preempt disable around do_xdp_generic() has been introduced in
commit
   bbbe211c295ff ("net: rcu lock and preempt disable missing around generic xdp")

For BPF it is enough to use migrate_disable() and the code was updated
as it can be seen in commit
   3c58482a382ba ("bpf: Provide bpf_prog_run_pin_on_cpu() helper")

[...]

Here is the summary with links:
  - [net-next] net/netif_receive_skb_core: Use migrate_disable()
    https://git.kernel.org/netdev/net/c/2b4cd14fd995

You are awesome, thank you!
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