[NET]: fix-up schedule_timeout() usage

Use schedule_timeout_{,un}interruptible() instead of
set_current_state()/schedule_timeout() to reduce kernel size.  Also use
human-time conversion functions instead of hard-coded division to avoid
rounding issues.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/pktgen.c

@@ -1452,8 +1452,7 @@ static int proc_thread_write(struct file *file, const char __user *user_buffer,
 		thread_lock();
 		t->control |= T_REMDEV;
 		thread_unlock();
-		current->state = TASK_INTERRUPTIBLE;
-		schedule_timeout(HZ/8);  /* Propagate thread->control  */
+		schedule_timeout_interruptible(msecs_to_jiffies(125));  /* Propagate thread->control  */
 		ret = count;
                 sprintf(pg_result, "OK: rem_device_all");
 		goto out;
@@ -1716,10 +1715,9 @@ static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
 	printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
 	while (now < spin_until_us) {
 		/* TODO: optimise sleeping behavior */
-		if (spin_until_us - now > (1000000/HZ)+1) {
-			current->state = TASK_INTERRUPTIBLE;
-			schedule_timeout(1);
-		} else if (spin_until_us - now > 100) {
+		if (spin_until_us - now > jiffies_to_usecs(1)+1)
+			schedule_timeout_interruptible(1);
+		else if (spin_until_us - now > 100) {
 			do_softirq();
 			if (!pkt_dev->running)
 				return;
@@ -2449,8 +2447,7 @@ static void pktgen_run_all_threads(void)
 	}
 	thread_unlock();
 
-	current->state = TASK_INTERRUPTIBLE;
-	schedule_timeout(HZ/8);  /* Propagate thread->control  */
+	schedule_timeout_interruptible(msecs_to_jiffies(125));  /* Propagate thread->control  */
 
 	pktgen_wait_all_threads_run();
 }

net/ipv4/ipconfig.c

@@ -1103,10 +1103,8 @@ static int __init ic_dynamic(void)
 #endif
 
 		jiff = jiffies + (d->next ? CONF_INTER_TIMEOUT : timeout);
-		while (time_before(jiffies, jiff) && !ic_got_reply) {
-			set_current_state(TASK_UNINTERRUPTIBLE);
-			schedule_timeout(1);
-		}
+		while (time_before(jiffies, jiff) && !ic_got_reply)
+			schedule_timeout_uninterruptible(1);
 #ifdef IPCONFIG_DHCP
 		/* DHCP isn't done until we get a DHCPACK. */
 		if ((ic_got_reply & IC_BOOTP)

net/irda/ircomm/ircomm_tty.c

@@ -567,10 +567,8 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp)
 	self->tty = NULL;
 
 	if (self->blocked_open) {
-		if (self->close_delay) {
-			current->state = TASK_INTERRUPTIBLE;
-			schedule_timeout(self->close_delay);
-		}
+		if (self->close_delay)
+			schedule_timeout_interruptible(self->close_delay);
 		wake_up_interruptible(&self->open_wait);
 	}
 
@@ -863,8 +861,7 @@ static void ircomm_tty_wait_until_sent(struct tty_struct *tty, int timeout)
 	spin_lock_irqsave(&self->spinlock, flags);
 	while (self->tx_skb && self->tx_skb->len) {
 		spin_unlock_irqrestore(&self->spinlock, flags);
-		current->state = TASK_INTERRUPTIBLE;
-		schedule_timeout(poll_time);
+		schedule_timeout_interruptible(poll_time);
 		spin_lock_irqsave(&self->spinlock, flags);
 		if (signal_pending(current))
 			break;

net/sunrpc/svcsock.c

@@ -1170,8 +1170,7 @@ svc_recv(struct svc_serv *serv, struct svc_rqst *rqstp, long timeout)
 	while (rqstp->rq_arghi < pages) {
 		struct page *p = alloc_page(GFP_KERNEL);
 		if (!p) {
-			set_current_state(TASK_UNINTERRUPTIBLE);
-			schedule_timeout(HZ/2);
+			schedule_timeout_uninterruptible(msecs_to_jiffies(500));
 			continue;
 		}
 		rqstp->rq_argpages[rqstp->rq_arghi++] = p;