netfilter: nft_set_pipapo: prefer gfp_kernel allocation

No need to use GFP_ATOMIC here.

Fixes: f6c383b8 ("netfilter: nf_tables: adapt set backend to use GC transaction API")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nft_set_pipapo.c

@@ -1597,7 +1597,7 @@ static void pipapo_gc(struct nft_set *set, struct nft_pipapo_match *m)
 		if (nft_set_elem_expired(&e->ext)) {
 			priv->dirty = true;
 
-			gc = nft_trans_gc_queue_sync(gc, GFP_ATOMIC);
+			gc = nft_trans_gc_queue_sync(gc, GFP_KERNEL);
 			if (!gc)
 				return;