net: ipv4: Add scaffolding to change completion function signature

This patch adds temporary scaffolding so that the Crypto API
completion function can take a void * instead of crypto_async_request.
Once affected users have been converted this can be removed.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

net/ipv4/ah4.c

@@ -117,11 +117,11 @@ static int ip_clear_mutable_options(const struct iphdr *iph, __be32 *daddr)
 	return 0;
 }
 
-static void ah_output_done(struct crypto_async_request *base, int err)
+static void ah_output_done(crypto_completion_data_t *data, int err)
 {
 	u8 *icv;
 	struct iphdr *iph;
-	struct sk_buff *skb = base->data;
+	struct sk_buff *skb = crypto_get_completion_data(data);
 	struct xfrm_state *x = skb_dst(skb)->xfrm;
 	struct ah_data *ahp = x->data;
 	struct iphdr *top_iph = ip_hdr(skb);
@@ -262,12 +262,12 @@ static int ah_output(struct xfrm_state *x, struct sk_buff *skb)
 	return err;
 }
 
-static void ah_input_done(struct crypto_async_request *base, int err)
+static void ah_input_done(crypto_completion_data_t *data, int err)
 {
 	u8 *auth_data;
 	u8 *icv;
 	struct iphdr *work_iph;
-	struct sk_buff *skb = base->data;
+	struct sk_buff *skb = crypto_get_completion_data(data);
 	struct xfrm_state *x = xfrm_input_state(skb);
 	struct ah_data *ahp = x->data;
 	struct ip_auth_hdr *ah = ip_auth_hdr(skb);

net/ipv4/esp4.c

@@ -244,9 +244,9 @@ static int esp_output_tail_tcp(struct xfrm_state *x, struct sk_buff *skb)
 }
 #endif
 
-static void esp_output_done(struct crypto_async_request *base, int err)
+static void esp_output_done(crypto_completion_data_t *data, int err)
 {
-	struct sk_buff *skb = base->data;
+	struct sk_buff *skb = crypto_get_completion_data(data);
 	struct xfrm_offload *xo = xfrm_offload(skb);
 	void *tmp;
 	struct xfrm_state *x;
@@ -332,12 +332,12 @@ static struct ip_esp_hdr *esp_output_set_extra(struct sk_buff *skb,
 	return esph;
 }
 
-static void esp_output_done_esn(struct crypto_async_request *base, int err)
+static void esp_output_done_esn(crypto_completion_data_t *data, int err)
 {
-	struct sk_buff *skb = base->data;
+	struct sk_buff *skb = crypto_get_completion_data(data);
 
 	esp_output_restore_header(skb);
-	esp_output_done(base, err);
+	esp_output_done(data, err);
 }
 
 static struct ip_esp_hdr *esp_output_udp_encap(struct sk_buff *skb,
@@ -830,9 +830,9 @@ int esp_input_done2(struct sk_buff *skb, int err)
 }
 EXPORT_SYMBOL_GPL(esp_input_done2);
 
-static void esp_input_done(struct crypto_async_request *base, int err)
+static void esp_input_done(crypto_completion_data_t *data, int err)
 {
-	struct sk_buff *skb = base->data;
+	struct sk_buff *skb = crypto_get_completion_data(data);
 
 	xfrm_input_resume(skb, esp_input_done2(skb, err));
 }
@@ -860,12 +860,12 @@ static void esp_input_set_header(struct sk_buff *skb, __be32 *seqhi)
 	}
 }
 
-static void esp_input_done_esn(struct crypto_async_request *base, int err)
+static void esp_input_done_esn(crypto_completion_data_t *data, int err)
 {
-	struct sk_buff *skb = base->data;
+	struct sk_buff *skb = crypto_get_completion_data(data);
 
 	esp_input_restore_header(skb);
-	esp_input_done(base, err);
+	esp_input_done(data, err);
 }
 
 /*