[NET]: Transform skb_queue_len() binary tests into skb_queue_empty()

This is part of the grand scheme to eliminate the qlen
member of skb_queue_head, and subsequently remove the
'list' member of sk_buff.

Most users of skb_queue_len() want to know if the queue is
empty or not, and that's trivially done with skb_queue_empty()
which doesn't use the skb_queue_head->qlen member and instead
uses the queue list emptyness as the test.

Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 16 insertions, 14 deletions

diff --git a/drivers/isdn/hisax/isdnl1.c b/drivers/isdn/hisax/isdnl1.c
index ac899503a74f..bab356886483 100644
--- a/drivers/isdn/hisax/isdnl1.c
+++ b/drivers/isdn/hisax/isdnl1.c
@@ -279,7 +279,8 @@ BChannel_proc_xmt(struct BCState *bcs)
         if (test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags))
                 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
         if (!test_bit(BC_FLG_ACTIV, &bcs->Flag)) {
-                if (!test_bit(BC_FLG_BUSY, &bcs->Flag) && (!skb_queue_len(&bcs->squeue))) {
+                if (!test_bit(BC_FLG_BUSY, &bcs->Flag) &&
+                    skb_queue_empty(&bcs->squeue)) {
                         st->l2.l2l1(st, PH_DEACTIVATE | CONFIRM, NULL);
                 }
         }
diff --git a/drivers/isdn/hisax/isdnl2.c b/drivers/isdn/hisax/isdnl2.c
index 9022583fd6a0..1615c1a76ab8 100644
--- a/drivers/isdn/hisax/isdnl2.c
+++ b/drivers/isdn/hisax/isdnl2.c
@@ -108,7 +108,8 @@ static int l2addrsize(struct Layer2 *l2);
 static void
 set_peer_busy(struct Layer2 *l2) {
         test_and_set_bit(FLG_PEER_BUSY, &l2->flag);
-        if (skb_queue_len(&l2->i_queue) || skb_queue_len(&l2->ui_queue))
+        if (!skb_queue_empty(&l2->i_queue) ||
+            !skb_queue_empty(&l2->ui_queue))
                 test_and_set_bit(FLG_L2BLOCK, &l2->flag);
 }
 
@@ -754,7 +755,7 @@ l2_restart_multi(struct FsmInst *fi, int event, void *arg)
                 st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL);
 
         if ((ST_L2_7==state) || (ST_L2_8 == state))
-                if (skb_queue_len(&st->l2.i_queue) && cansend(st))
+                if (!skb_queue_empty(&st->l2.i_queue) && cansend(st))
                         st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
 }
 
@@ -810,7 +811,7 @@ l2_connected(struct FsmInst *fi, int event, void *arg)
         if (pr != -1)
                 st->l2.l2l3(st, pr, NULL);
 
-        if (skb_queue_len(&st->l2.i_queue) && cansend(st))
+        if (!skb_queue_empty(&st->l2.i_queue) && cansend(st))
                 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
 }
 
@@ -1014,7 +1015,7 @@ l2_st7_got_super(struct FsmInst *fi, int event, void *arg)
                         if(typ != RR) FsmDelTimer(&st->l2.t203, 9);
                         restart_t200(st, 12);
                 }
-                if (skb_queue_len(&st->l2.i_queue) && (typ == RR))
+                if (!skb_queue_empty(&st->l2.i_queue) && (typ == RR))
                         st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
         } else
                 nrerrorrecovery(fi);
@@ -1120,7 +1121,7 @@ l2_got_iframe(struct FsmInst *fi, int event, void *arg)
                 return;
         }
 
-        if (skb_queue_len(&st->l2.i_queue) && (fi->state == ST_L2_7))
+        if (!skb_queue_empty(&st->l2.i_queue) && (fi->state == ST_L2_7))
                 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
         if (test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag))
                 enquiry_cr(st, RR, RSP, 0);
@@ -1138,7 +1139,7 @@ l2_got_tei(struct FsmInst *fi, int event, void *arg)
                 test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
         } else
                 FsmChangeState(fi, ST_L2_4);
-        if (skb_queue_len(&st->l2.ui_queue))
+        if (!skb_queue_empty(&st->l2.ui_queue))
                 tx_ui(st);
 }
 
@@ -1301,7 +1302,7 @@ l2_pull_iqueue(struct FsmInst *fi, int event, void *arg)
                 FsmDelTimer(&st->l2.t203, 13);
                 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 11);
         }
-        if (skb_queue_len(&l2->i_queue) && cansend(st))
+        if (!skb_queue_empty(&l2->i_queue) && cansend(st))
                 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
 }
 
@@ -1347,7 +1348,7 @@ l2_st8_got_super(struct FsmInst *fi, int event, void *arg)
                         }
                         invoke_retransmission(st, nr);
                         FsmChangeState(fi, ST_L2_7);
-                        if (skb_queue_len(&l2->i_queue) && cansend(st))
+                        if (!skb_queue_empty(&l2->i_queue) && cansend(st))
                                 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
                 } else
                         nrerrorrecovery(fi);
diff --git a/drivers/isdn/hisax/isdnl3.c b/drivers/isdn/hisax/isdnl3.c
index abcc9530eb34..c9917cd2132b 100644
--- a/drivers/isdn/hisax/isdnl3.c
+++ b/drivers/isdn/hisax/isdnl3.c
@@ -302,7 +302,7 @@ release_l3_process(struct l3_process *p)
                                 !test_bit(FLG_PTP, &p->st->l2.flag)) {
                                 if (p->debug)
                                         l3_debug(p->st, "release_l3_process: last process");
-                                if (!skb_queue_len(&p->st->l3.squeue)) {
+                                if (skb_queue_empty(&p->st->l3.squeue)) {
                                         if (p->debug)
                                                 l3_debug(p->st, "release_l3_process: release link");
                                         if (p->st->protocol != ISDN_PTYPE_NI1)
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index ad5aa38fb5a6..b37ef1f06b3d 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -1223,7 +1223,7 @@ isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
                 total += c;
         }
         atomic_dec(&info->xmit_lock);
-        if ((info->xmit_count) || (skb_queue_len(&info->xmit_queue))) {
+        if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
                 if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
                         isdn_tty_senddown(info);
                         isdn_tty_tint(info);
@@ -1284,7 +1284,7 @@ isdn_tty_flush_chars(struct tty_struct *tty)
 
         if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
                 return;
-        if ((info->xmit_count) || (skb_queue_len(&info->xmit_queue)))
+        if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
                 isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
 }
 
diff --git a/drivers/isdn/icn/icn.c b/drivers/isdn/icn/icn.c
index 9fc0c1e03732..e0d1b01cc74c 100644
--- a/drivers/isdn/icn/icn.c
+++ b/drivers/isdn/icn/icn.c
@@ -304,12 +304,12 @@ icn_pollbchan_send(int channel, icn_card * card)
         isdn_ctrl cmd;
 
         if (!(card->sndcount[channel] || card->xskb[channel] ||
-              skb_queue_len(&card->spqueue[channel])))
+              !skb_queue_empty(&card->spqueue[channel])))
                 return;
         if (icn_trymaplock_channel(card, mch)) {
                 while (sbfree && 
                        (card->sndcount[channel] ||
-                        skb_queue_len(&card->spqueue[channel]) ||
+                        !skb_queue_empty(&card->spqueue[channel]) ||
                         card->xskb[channel])) {
                         spin_lock_irqsave(&card->lock, flags);
                         if (card->xmit_lock[channel]) {