s/schedule_timeout(0)/yield/ in cdu31a, sonycd535, sb1000, and sis900 drivers

drivers/cdrom/cdu31a.c

@@ -386,8 +386,7 @@ static inline void sony_sleep(void)
 	unsigned long flags;
 
 	if (cdu31a_irq <= 0) {
-		current->state = TASK_INTERRUPTIBLE;
-		schedule_timeout(0);
+		yield();
 	} else {		/* Interrupt driven */
 
 		save_flags(flags);

drivers/cdrom/sonycd535.c

@@ -344,8 +344,7 @@ static inline void
 sony_sleep(void)
 {
 	if (sony535_irq_used <= 0) {	/* poll */
-		current->state = TASK_INTERRUPTIBLE;
-		schedule_timeout(0);
+		yield();
 	} else {	/* Interrupt driven */
 		cli();
 		enable_interrupts();

drivers/net/sb1000.c

@@ -295,8 +295,8 @@ card_wait_for_busy_clear(const int ioaddr[], const char* name)
 	timeout = jiffies + TimeOutJiffies;
 	while (a & 0x80 || a & 0x40) {
 		/* a little sleep */
-		current->state = TASK_INTERRUPTIBLE;
-		schedule_timeout(0);
+		yield();
+
 		a = inb(ioaddr[0] + 7);
 		if (jiffies >= timeout) {
 			printk(KERN_WARNING "%s: card_wait_for_busy_clear timeout\n",
@@ -319,8 +319,8 @@ card_wait_for_ready(const int ioaddr[], const char* name, unsigned char in[])
 	timeout = jiffies + TimeOutJiffies;
 	while (a & 0x80 || !(a & 0x40)) {
 		/* a little sleep */
-		current->state = TASK_INTERRUPTIBLE;
-		schedule_timeout(0);
+		yield();
+
 		a = inb(ioaddr[1] + 6);
 		if (jiffies >= timeout) {
 			printk(KERN_WARNING "%s: card_wait_for_ready timeout\n",

drivers/net/sis900.c

@@ -573,8 +573,8 @@ static int __init sis900_mii_probe (struct net_device * net_dev)
 
 	if(status & MII_STAT_LINK){
 		while (poll_bit) {
-			current->state = TASK_INTERRUPTIBLE;
-			schedule_timeout(0);
+			yield();
+
 			poll_bit ^= (mdio_read(net_dev, sis_priv->cur_phy, MII_STATUS) & poll_bit);
 			if (jiffies >= timeout) {
 				printk(KERN_WARNING "%s: reset phy and link down now\n", net_dev->name);