Merge branch 'net-Use-FIELD_SIZEOF-directly-instead-of-reimplementing-its-function'

zhong jiang says:

====================
net: Use FIELD_SIZEOF directly instead of reimplementing its function

The issue is detected with the help of Coccinelle.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qede/qede.h

@@ -440,7 +440,7 @@ struct qede_fastpath {
 	struct qede_tx_queue	*txq;
 	struct qede_tx_queue	*xdp_tx;
 
-#define VEC_NAME_SIZE	(sizeof(((struct net_device *)0)->name) + 8)
+#define VEC_NAME_SIZE  (FIELD_SIZEOF(struct net_device, name) + 8)
 	char	name[VEC_NAME_SIZE];
 };
 

drivers/net/ethernet/ti/cpsw.c

@@ -484,13 +484,13 @@ enum {
 };
 
 #define CPSW_STAT(m)		CPSW_STATS,				\
-				sizeof(((struct cpsw_hw_stats *)0)->m), \
+				FIELD_SIZEOF(struct cpsw_hw_stats, m), \
 				offsetof(struct cpsw_hw_stats, m)
 #define CPDMA_RX_STAT(m)	CPDMA_RX_STATS,				   \
-				sizeof(((struct cpdma_chan_stats *)0)->m), \
+				FIELD_SIZEOF(struct cpdma_chan_stats, m), \
 				offsetof(struct cpdma_chan_stats, m)
 #define CPDMA_TX_STAT(m)	CPDMA_TX_STATS,				   \
-				sizeof(((struct cpdma_chan_stats *)0)->m), \
+				FIELD_SIZEOF(struct cpdma_chan_stats, m), \
 				offsetof(struct cpdma_chan_stats, m)
 
 static const struct cpsw_stats cpsw_gstrings_stats[] = {

net/core/flow_dissector.c

@@ -382,8 +382,8 @@ __skb_flow_dissect_gre(const struct sk_buff *skb,
 	offset += sizeof(struct gre_base_hdr);
 
 	if (hdr->flags & GRE_CSUM)
-		offset += sizeof(((struct gre_full_hdr *) 0)->csum) +
-			  sizeof(((struct gre_full_hdr *) 0)->reserved1);
+		offset += FIELD_SIZEOF(struct gre_full_hdr, csum) +
+			  FIELD_SIZEOF(struct gre_full_hdr, reserved1);
 
 	if (hdr->flags & GRE_KEY) {
 		const __be32 *keyid;
@@ -405,11 +405,11 @@ __skb_flow_dissect_gre(const struct sk_buff *skb,
 			else
 				key_keyid->keyid = *keyid & GRE_PPTP_KEY_MASK;
 		}
-		offset += sizeof(((struct gre_full_hdr *) 0)->key);
+		offset += FIELD_SIZEOF(struct gre_full_hdr, key);
 	}
 
 	if (hdr->flags & GRE_SEQ)
-		offset += sizeof(((struct pptp_gre_header *) 0)->seq);
+		offset += FIELD_SIZEOF(struct pptp_gre_header, seq);
 
 	if (gre_ver == 0) {
 		if (*p_proto == htons(ETH_P_TEB)) {
@@ -436,7 +436,7 @@ __skb_flow_dissect_gre(const struct sk_buff *skb,
 		u8 *ppp_hdr;
 
 		if (hdr->flags & GRE_ACK)
-			offset += sizeof(((struct pptp_gre_header *) 0)->ack);
+			offset += FIELD_SIZEOF(struct pptp_gre_header, ack);
 
 		ppp_hdr = __skb_header_pointer(skb, *p_nhoff + offset,
 					       sizeof(_ppp_hdr),

net/iucv/af_iucv.c

@@ -48,7 +48,7 @@ static struct iucv_interface *pr_iucv;
 static const u8 iprm_shutdown[8] =
 	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01};
 
-#define TRGCLS_SIZE	(sizeof(((struct iucv_message *)0)->class))
+#define TRGCLS_SIZE	FIELD_SIZEOF(struct iucv_message, class)
 
 #define __iucv_sock_wait(sk, condition, timeo, ret)			\
 do {									\

net/sched/cls_flower.c

@@ -993,7 +993,7 @@ static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
 }
 
 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
-#define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
+#define FL_KEY_MEMBER_SIZE(member) FIELD_SIZEOF(struct fl_flow_key, member)
 
 #define FL_KEY_IS_MASKED(mask, member)						\
 	memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),		\