Merge branch 'linux-2.6' into for-2.6.22

5 files changed, 45 insertions, 90 deletions

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index f5c160caf9f..5f066963f17 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -248,7 +248,7 @@ static unsigned long get_unmapped_area_mem(struct file *file,
 {
 	if (!valid_mmap_phys_addr_range(pgoff, len))
 		return (unsigned long) -EINVAL;
-	return pgoff;
+	return pgoff << PAGE_SHIFT;
 }
 
 /* can't do an in-place private mapping if there's no MMU */
diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index a61fb6da5d0..80a01150b86 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -1338,43 +1338,23 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int c
 		 *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
 		 * Caller should use TIOCGICOUNT to see which one it was
 		 */
-	case TIOCMIWAIT: {
-			DECLARE_WAITQUEUE(wait, current);
-			int ret;
+	case TIOCMIWAIT:
+		spin_lock_irqsave(&info->slock, flags);
+		cnow = info->icount;	/* note the counters on entry */
+		spin_unlock_irqrestore(&info->slock, flags);
+
+		wait_event_interruptible(info->delta_msr_wait, ({
+			cprev = cnow;
 			spin_lock_irqsave(&info->slock, flags);
-			cprev = info->icount;	/* note the counters on entry */
+			cnow = info->icount;	/* atomic copy */
 			spin_unlock_irqrestore(&info->slock, flags);
 
-			add_wait_queue(&info->delta_msr_wait, &wait);
-			while (1) {
-				spin_lock_irqsave(&info->slock, flags);
-				cnow = info->icount;	/* atomic copy */
-				spin_unlock_irqrestore(&info->slock, flags);
-
-				set_current_state(TASK_INTERRUPTIBLE);
-				if (((arg & TIOCM_RNG) &&
-						(cnow.rng != cprev.rng)) ||
-						((arg & TIOCM_DSR) &&
-						(cnow.dsr != cprev.dsr)) ||
-						((arg & TIOCM_CD) &&
-						(cnow.dcd != cprev.dcd)) ||
-						((arg & TIOCM_CTS) &&
-						(cnow.cts != cprev.cts))) {
-					ret = 0;
-					break;
-				}
-				/* see if a signal did it */
-				if (signal_pending(current)) {
-					ret = -ERESTARTSYS;
-					break;
-				}
-				cprev = cnow;
-			}
-			current->state = TASK_RUNNING;
-			remove_wait_queue(&info->delta_msr_wait, &wait);
-			break;
-		}
-		/* NOTREACHED */
+			((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
+			((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
+			((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
+			((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
+		}));
+		break;
 		/*
 		 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
 		 * Return: write counters to the user passed counter struct
diff --git a/drivers/char/mxser_new.c b/drivers/char/mxser_new.c
index 9af07e4999d..f7603b6aeb8 100644
--- a/drivers/char/mxser_new.c
+++ b/drivers/char/mxser_new.c
@@ -1758,43 +1758,23 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
 		 *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
 		 * Caller should use TIOCGICOUNT to see which one it was
 		 */
-	case TIOCMIWAIT: {
-		DECLARE_WAITQUEUE(wait, current);
-		int ret;
+	case TIOCMIWAIT:
 		spin_lock_irqsave(&info->slock, flags);
-		cprev = info->icount;	/* note the counters on entry */
+		cnow = info->icount;	/* note the counters on entry */
 		spin_unlock_irqrestore(&info->slock, flags);
 
-		add_wait_queue(&info->delta_msr_wait, &wait);
-		while (1) {
+		wait_event_interruptible(info->delta_msr_wait, ({
+			cprev = cnow;
 			spin_lock_irqsave(&info->slock, flags);
 			cnow = info->icount;	/* atomic copy */
 			spin_unlock_irqrestore(&info->slock, flags);
 
-			set_current_state(TASK_INTERRUPTIBLE);
-			if (((arg & TIOCM_RNG) &&
-					(cnow.rng != cprev.rng)) ||
-					((arg & TIOCM_DSR) &&
-					(cnow.dsr != cprev.dsr)) ||
-					((arg & TIOCM_CD) &&
-					(cnow.dcd != cprev.dcd)) ||
-					((arg & TIOCM_CTS) &&
-					(cnow.cts != cprev.cts))) {
-				ret = 0;
-				break;
-			}
-			/* see if a signal did it */
-			if (signal_pending(current)) {
-				ret = -ERESTARTSYS;
-				break;
-			}
-			cprev = cnow;
-		}
-		current->state = TASK_RUNNING;
-		remove_wait_queue(&info->delta_msr_wait, &wait);
+			((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
+			((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
+			((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
+			((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
+		}));
 		break;
-	}
-	/* NOTREACHED */
 	/*
 	 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
 	 * Return: write counters to the user passed counter struct
@@ -2230,7 +2210,14 @@ end_intr:
 	port->mon_data.rxcnt += cnt;
 	port->mon_data.up_rxcnt += cnt;
 
+	/*
+	 * We are called from an interrupt context with &port->slock
+	 * being held. Drop it temporarily in order to prevent
+	 * recursive locking.
+	 */
+	spin_unlock(&port->slock);
 	tty_flip_buffer_push(tty);
+	spin_lock(&port->slock);
 }
 
 static void mxser_transmit_chars(struct mxser_port *port)
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 8d025e9b5bc..157b1d09ab5 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -4169,7 +4169,7 @@ static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
 	netif_stop_queue(dev);
 
 	/* copy data to device buffers */
-	memcpy(info->tx_buf, skb->data, skb->len);
+	skb_copy_from_linear_data(skb, info->tx_buf, skb->len);
 	info->tx_get = 0;
 	info->tx_put = info->tx_count = skb->len;
 
diff --git a/drivers/char/random.c b/drivers/char/random.c
index b9dc7aa1dfb..46c1b97748b 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -881,15 +881,15 @@ EXPORT_SYMBOL(get_random_bytes);
  */
 static void init_std_data(struct entropy_store *r)
 {
-	struct timeval tv;
+	ktime_t now;
 	unsigned long flags;
 
 	spin_lock_irqsave(&r->lock, flags);
 	r->entropy_count = 0;
 	spin_unlock_irqrestore(&r->lock, flags);
 
-	do_gettimeofday(&tv);
-	add_entropy_words(r, (__u32 *)&tv, sizeof(tv)/4);
+	now = ktime_get_real();
+	add_entropy_words(r, (__u32 *)&now, sizeof(now)/4);
 	add_entropy_words(r, (__u32 *)utsname(),
 			  sizeof(*(utsname()))/4);
 }
@@ -911,14 +911,12 @@ void rand_initialize_irq(int irq)
 		return;
 
 	/*
-	 * If kmalloc returns null, we just won't use that entropy
+	 * If kzalloc returns null, we just won't use that entropy
 	 * source.
 	 */
-	state = kmalloc(sizeof(struct timer_rand_state), GFP_KERNEL);
-	if (state) {
-		memset(state, 0, sizeof(struct timer_rand_state));
+	state = kzalloc(sizeof(struct timer_rand_state), GFP_KERNEL);
+	if (state)
 		irq_timer_state[irq] = state;
-	}
 }
 
 #ifdef CONFIG_BLOCK
@@ -927,14 +925,12 @@ void rand_initialize_disk(struct gendisk *disk)
 	struct timer_rand_state *state;
 
 	/*
-	 * If kmalloc returns null, we just won't use that entropy
+	 * If kzalloc returns null, we just won't use that entropy
 	 * source.
 	 */
-	state = kmalloc(sizeof(struct timer_rand_state), GFP_KERNEL);
-	if (state) {
-		memset(state, 0, sizeof(struct timer_rand_state));
+	state = kzalloc(sizeof(struct timer_rand_state), GFP_KERNEL);
+	if (state)
 		disk->random = state;
-	}
 }
 #endif
 
@@ -1469,7 +1465,6 @@ late_initcall(seqgen_init);
 __u32 secure_tcpv6_sequence_number(__be32 *saddr, __be32 *daddr,
 				   __be16 sport, __be16 dport)
 {
-	struct timeval tv;
 	__u32 seq;
 	__u32 hash[12];
 	struct keydata *keyptr = get_keyptr();
@@ -1485,8 +1480,7 @@ __u32 secure_tcpv6_sequence_number(__be32 *saddr, __be32 *daddr,
 	seq = twothirdsMD4Transform((const __u32 *)daddr, hash) & HASH_MASK;
 	seq += keyptr->count;
 
-	do_gettimeofday(&tv);
-	seq += tv.tv_usec + tv.tv_sec * 1000000;
+	seq += ktime_get_real().tv64;
 
 	return seq;
 }
@@ -1521,7 +1515,6 @@ __u32 secure_ip_id(__be32 daddr)
 __u32 secure_tcp_sequence_number(__be32 saddr, __be32 daddr,
 				 __be16 sport, __be16 dport)
 {
-	struct timeval tv;
 	__u32 seq;
 	__u32 hash[4];
 	struct keydata *keyptr = get_keyptr();
@@ -1543,12 +1536,11 @@ __u32 secure_tcp_sequence_number(__be32 saddr, __be32 daddr,
 	 *	As close as possible to RFC 793, which
 	 *	suggests using a 250 kHz clock.
 	 *	Further reading shows this assumes 2 Mb/s networks.
-	 *	For 10 Mb/s Ethernet, a 1 MHz clock is appropriate.
+	 *	For 10 Gb/s Ethernet, a 1 GHz clock is appropriate.
 	 *	That's funny, Linux has one built in!  Use it!
 	 *	(Networks are faster now - should this be increased?)
 	 */
-	do_gettimeofday(&tv);
-	seq += tv.tv_usec + tv.tv_sec * 1000000;
+	seq += ktime_get_real().tv64;
 #if 0
 	printk("init_seq(%lx, %lx, %d, %d) = %d\n",
 	       saddr, daddr, sport, dport, seq);
@@ -1556,8 +1548,6 @@ __u32 secure_tcp_sequence_number(__be32 saddr, __be32 daddr,
 	return seq;
 }
 
-EXPORT_SYMBOL(secure_tcp_sequence_number);
-
 /* Generate secure starting point for ephemeral IPV4 transport port search */
 u32 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport)
 {
@@ -1598,7 +1588,6 @@ u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr, __be16
 u64 secure_dccp_sequence_number(__be32 saddr, __be32 daddr,
 				__be16 sport, __be16 dport)
 {
-	struct timeval tv;
 	u64 seq;
 	__u32 hash[4];
 	struct keydata *keyptr = get_keyptr();
@@ -1611,8 +1600,7 @@ u64 secure_dccp_sequence_number(__be32 saddr, __be32 daddr,
 	seq = half_md4_transform(hash, keyptr->secret);
 	seq |= ((u64)keyptr->count) << (32 - HASH_BITS);
 
-	do_gettimeofday(&tv);
-	seq += tv.tv_usec + tv.tv_sec * 1000000;
+	seq += ktime_get_real().tv64;
 	seq &= (1ull << 48) - 1;
 #if 0
 	printk("dccp init_seq(%lx, %lx, %d, %d) = %d\n",