Merge branch 'net-some-build-fixes-and-other-improvements'

Jakub Kicinski says:

====================
net: some build fixes and other improvements

A few unrelated improvements here, mostly trying to make random
configs build and W=1 produce a little less warnings under net/
and drivers net/.

First two patches fix set but not used warnings with W=1.

Next patch fixes 64bit division in sch_taprio.c.

Last two patches are getting rid of some (almost) unused asserts
in skbuff.h.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cortina/gemini.c

@@ -1235,8 +1235,6 @@ static int gmac_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 	int txq_num, nfrags;
 	union dma_rwptr rw;
 
-	SKB_FRAG_ASSERT(skb);
-
 	if (skb->len >= 0x10000)
 		goto out_drop_free;
 

drivers/net/sb1000.c

@@ -316,7 +316,7 @@ static int
 card_send_command(const int ioaddr[], const char* name,
 	const unsigned char out[], unsigned char in[])
 {
-	int status, x;
+	int status;
 
 	if ((status = card_wait_for_busy_clear(ioaddr, name)))
 		return status;
@@ -345,9 +345,7 @@ card_send_command(const int ioaddr[], const char* name,
 				out[0], out[1], out[2], out[3], out[4], out[5]);
 	}
 
-	if (out[1] == 0x1b) {
-		x = (out[2] == 0x02);
-	} else {
+	if (out[1] != 0x1b) {
 		if (out[0] >= 0x80 && in[0] != (out[1] | 0x80))
 			return -EIO;
 	}
@@ -490,14 +488,13 @@ sb1000_check_CRC(const int ioaddr[], const char* name)
 	static const unsigned char Command0[6] = {0x80, 0x1f, 0x00, 0x00, 0x00, 0x00};
 
 	unsigned char st[7];
-	int crc, status;
+	int status;
 
 	/* check CRC */
 	if ((status = card_send_command(ioaddr, name, Command0, st)))
 		return status;
 	if (st[1] != st[3] || st[2] != st[4])
 		return -EIO;
-	crc = st[1] << 8 | st[2];
 	return 0;
 }
 

include/linux/skbuff.h

@@ -2100,8 +2100,6 @@ void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page, int off,
 void skb_coalesce_rx_frag(struct sk_buff *skb, int i, int size,
 			  unsigned int truesize);
 
-#define SKB_PAGE_ASSERT(skb) 	BUG_ON(skb_shinfo(skb)->nr_frags)
-#define SKB_FRAG_ASSERT(skb) 	BUG_ON(skb_has_frag_list(skb))
 #define SKB_LINEAR_ASSERT(skb)  BUG_ON(skb_is_nonlinear(skb))
 
 #ifdef NET_SKBUFF_DATA_USES_OFFSET

net/l2tp/l2tp_ppp.c

@@ -1070,7 +1070,6 @@ static int pppol2tp_ioctl(struct socket *sock, unsigned int cmd,
 {
 	struct pppol2tp_ioc_stats stats;
 	struct l2tp_session *session;
-	int val;
 
 	switch (cmd) {
 	case PPPIOCGMRU:
@@ -1097,7 +1096,7 @@ static int pppol2tp_ioctl(struct socket *sock, unsigned int cmd,
 		if (!session->session_id && !session->peer_session_id)
 			return -ENOSYS;
 
-		if (get_user(val, (int __user *)arg))
+		if (!access_ok((int __user *)arg, sizeof(int)))
 			return -EFAULT;
 		break;
 

net/sched/sch_taprio.c

@@ -13,6 +13,7 @@
 #include <linux/list.h>
 #include <linux/errno.h>
 #include <linux/skbuff.h>
+#include <linux/math64.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
 #include <net/netlink.h>
@@ -121,7 +122,14 @@ static struct sk_buff *taprio_peek(struct Qdisc *sch)
 
 static inline int length_to_duration(struct taprio_sched *q, int len)
 {
-	return (len * atomic64_read(&q->picos_per_byte)) / 1000;
+	return div_u64(len * atomic64_read(&q->picos_per_byte), 1000);
+}
+
+static void taprio_set_budget(struct taprio_sched *q, struct sched_entry *entry)
+{
+	atomic_set(&entry->budget,
+		   div64_u64((u64)entry->interval * 1000,
+			     atomic64_read(&q->picos_per_byte)));
 }
 
 static struct sk_buff *taprio_dequeue(struct Qdisc *sch)
@@ -241,8 +249,7 @@ static enum hrtimer_restart advance_sched(struct hrtimer *timer)
 	close_time = ktime_add_ns(entry->close_time, next->interval);
 
 	next->close_time = close_time;
-	atomic_set(&next->budget,
-		   (next->interval * 1000) / atomic64_read(&q->picos_per_byte));
+	taprio_set_budget(q, next);
 
 first_run:
 	rcu_assign_pointer(q->current_entry, next);
@@ -575,9 +582,7 @@ static void taprio_start_sched(struct Qdisc *sch, ktime_t start)
 				 list);
 
 	first->close_time = ktime_add_ns(start, first->interval);
-	atomic_set(&first->budget,
-		   (first->interval * 1000) /
-		   atomic64_read(&q->picos_per_byte));
+	taprio_set_budget(q, first);
 	rcu_assign_pointer(q->current_entry, NULL);
 
 	spin_unlock_irqrestore(&q->current_entry_lock, flags);