11 files changed, 86 insertions, 44 deletions

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index ad59b4e0a9b5..49502bc5360a 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -523,7 +523,7 @@ config RAW_DRIVER
           with the O_DIRECT flag.
 
 config MAX_RAW_DEVS
-	int "Maximum number of RAW devices to support (1-8192)"
+	int "Maximum number of RAW devices to support (1-65536)"
 	depends on RAW_DRIVER
 	default "256"
 	help
diff --git a/drivers/char/apm-emulation.c b/drivers/char/apm-emulation.c
index 45b987c9889e..548708c4b2b8 100644
--- a/drivers/char/apm-emulation.c
+++ b/drivers/char/apm-emulation.c
@@ -126,7 +126,6 @@ struct apm_user {
 /*
  * Local variables
  */
-static DEFINE_MUTEX(apm_mutex);
 static atomic_t suspend_acks_pending = ATOMIC_INIT(0);
 static atomic_t userspace_notification_inhibit = ATOMIC_INIT(0);
 static int apm_disabled;
@@ -275,7 +274,6 @@ apm_ioctl(struct file *filp, u_int cmd, u_long arg)
 	if (!as->suser || !as->writer)
 		return -EPERM;
 
-	mutex_lock(&apm_mutex);
 	switch (cmd) {
 	case APM_IOC_SUSPEND:
 		mutex_lock(&state_lock);
@@ -336,7 +334,6 @@ apm_ioctl(struct file *filp, u_int cmd, u_long arg)
 		mutex_unlock(&state_lock);
 		break;
 	}
-	mutex_unlock(&apm_mutex);
 
 	return err;
 }
@@ -371,7 +368,6 @@ static int apm_open(struct inode * inode, struct file * filp)
 {
 	struct apm_user *as;
 
-	mutex_lock(&apm_mutex);
 	as = kzalloc(sizeof(*as), GFP_KERNEL);
 	if (as) {
 		/*
@@ -391,7 +387,6 @@ static int apm_open(struct inode * inode, struct file * filp)
 
 		filp->private_data = as;
 	}
-	mutex_unlock(&apm_mutex);
 
 	return as ? 0 : -ENOMEM;
 }
diff --git a/drivers/char/bsr.c b/drivers/char/bsr.c
index a4a6c2f044b5..cf39bc08ce08 100644
--- a/drivers/char/bsr.c
+++ b/drivers/char/bsr.c
@@ -295,7 +295,7 @@ static int bsr_create_devs(struct device_node *bn)
 static int __init bsr_init(void)
 {
 	struct device_node *np;
-	dev_t bsr_dev = MKDEV(bsr_major, 0);
+	dev_t bsr_dev;
 	int ret = -ENODEV;
 	int result;
 
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index 7066e801b9d3..051474c65b78 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -84,8 +84,6 @@ static struct clocksource clocksource_hpet = {
 	.rating		= 250,
 	.read		= read_hpet,
 	.mask		= CLOCKSOURCE_MASK(64),
-	.mult		= 0,		/* to be calculated */
-	.shift		= 10,
 	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
 };
 static struct clocksource *hpet_clocksource;
@@ -934,9 +932,7 @@ int hpet_alloc(struct hpet_data *hdp)
 	if (!hpet_clocksource) {
 		hpet_mctr = (void __iomem *)&hpetp->hp_hpet->hpet_mc;
 		CLKSRC_FSYS_MMIO_SET(clocksource_hpet.fsys_mmio, hpet_mctr);
-		clocksource_hpet.mult = clocksource_hz2mult(hpetp->hp_tick_freq,
-						clocksource_hpet.shift);
-		clocksource_register(&clocksource_hpet);
+		clocksource_register_hz(&clocksource_hpet, hpetp->hp_tick_freq);
 		hpetp->hp_clocksource = &clocksource_hpet;
 		hpet_clocksource = &clocksource_hpet;
 	}
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index beecd1cf9b99..a60043b3e409 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -49,7 +49,7 @@ config HW_RANDOM_INTEL
 
 config HW_RANDOM_AMD
 	tristate "AMD HW Random Number Generator support"
-	depends on HW_RANDOM && X86 && PCI
+	depends on HW_RANDOM && (X86 || PPC_MAPLE) && PCI
 	default HW_RANDOM
 	---help---
 	  This driver provides kernel-side support for the Random Number
diff --git a/drivers/char/hw_random/amd-rng.c b/drivers/char/hw_random/amd-rng.c
index 0d8c5788b8e4..c6af038682f1 100644
--- a/drivers/char/hw_random/amd-rng.c
+++ b/drivers/char/hw_random/amd-rng.c
@@ -133,6 +133,12 @@ found:
 	pmbase &= 0x0000FF00;
 	if (pmbase == 0)
 		goto out;
+	if (!request_region(pmbase + 0xF0, 8, "AMD HWRNG")) {
+		dev_err(&pdev->dev, "AMD HWRNG region 0x%x already in use!\n",
+			pmbase + 0xF0);
+		err = -EBUSY;
+		goto out;
+	}
 	amd_rng.priv = (unsigned long)pmbase;
 	amd_pdev = pdev;
 
@@ -141,6 +147,7 @@ found:
 	if (err) {
 		printk(KERN_ERR PFX "RNG registering failed (%d)\n",
 		       err);
+		release_region(pmbase + 0xF0, 8);
 		goto out;
 	}
 out:
@@ -149,6 +156,8 @@ out:
 
 static void __exit mod_exit(void)
 {
+	u32 pmbase = (unsigned long)amd_rng.priv;
+	release_region(pmbase + 0xF0, 8);
 	hwrng_unregister(&amd_rng);
 }
 
diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c
index 43ac61978d8b..ac6739e085e3 100644
--- a/drivers/char/hw_random/n2-drv.c
+++ b/drivers/char/hw_random/n2-drv.c
@@ -619,15 +619,18 @@ static void __devinit n2rng_driver_version(void)
 		pr_info("%s", version);
 }
 
+static const struct of_device_id n2rng_match[];
 static int __devinit n2rng_probe(struct platform_device *op)
 {
+	const struct of_device_id *match;
 	int victoria_falls;
 	int err = -ENOMEM;
 	struct n2rng *np;
 
-	if (!op->dev.of_match)
+	match = of_match_device(n2rng_match, &op->dev);
+	if (!match)
 		return -EINVAL;
-	victoria_falls = (op->dev.of_match->data != NULL);
+	victoria_falls = (match->data != NULL);
 
 	n2rng_driver_version();
 	np = kzalloc(sizeof(*np), GFP_KERNEL);
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index cc6c9b2546a3..64c6b8530615 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -2554,9 +2554,11 @@ static struct pci_driver ipmi_pci_driver = {
 };
 #endif /* CONFIG_PCI */
 
+static struct of_device_id ipmi_match[];
 static int __devinit ipmi_probe(struct platform_device *dev)
 {
 #ifdef CONFIG_OF
+	const struct of_device_id *match;
 	struct smi_info *info;
 	struct resource resource;
 	const __be32 *regsize, *regspacing, *regshift;
@@ -2566,7 +2568,8 @@ static int __devinit ipmi_probe(struct platform_device *dev)
 
 	dev_info(&dev->dev, "probing via device tree\n");
 
-	if (!dev->dev.of_match)
+	match = of_match_device(ipmi_match, &dev->dev);
+	if (!match)
 		return -EINVAL;
 
 	ret = of_address_to_resource(np, 0, &resource);
@@ -2601,7 +2604,7 @@ static int __devinit ipmi_probe(struct platform_device *dev)
 		return -ENOMEM;
 	}
 
-	info->si_type		= (enum si_type) dev->dev.of_match->data;
+	info->si_type		= (enum si_type) match->data;
 	info->addr_source	= SI_DEVICETREE;
 	info->irq_setup		= std_irq_setup;
 
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 436a99017998..8fc04b4f311f 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -806,29 +806,41 @@ static const struct file_operations oldmem_fops = {
 };
 #endif
 
-static ssize_t kmsg_write(struct file *file, const char __user *buf,
-			  size_t count, loff_t *ppos)
+static ssize_t kmsg_writev(struct kiocb *iocb, const struct iovec *iv,
+			   unsigned long count, loff_t pos)
 {
-	char *tmp;
-	ssize_t ret;
+	char *line, *p;
+	int i;
+	ssize_t ret = -EFAULT;
+	size_t len = iov_length(iv, count);
 
-	tmp = kmalloc(count + 1, GFP_KERNEL);
-	if (tmp == NULL)
+	line = kmalloc(len + 1, GFP_KERNEL);
+	if (line == NULL)
 		return -ENOMEM;
-	ret = -EFAULT;
-	if (!copy_from_user(tmp, buf, count)) {
-		tmp[count] = 0;
-		ret = printk("%s", tmp);
-		if (ret > count)
-			/* printk can add a prefix */
-			ret = count;
+
+	/*
+	 * copy all vectors into a single string, to ensure we do
+	 * not interleave our log line with other printk calls
+	 */
+	p = line;
+	for (i = 0; i < count; i++) {
+		if (copy_from_user(p, iv[i].iov_base, iv[i].iov_len))
+			goto out;
+		p += iv[i].iov_len;
 	}
-	kfree(tmp);
+	p[0] = '\0';
+
+	ret = printk("%s", line);
+	/* printk can add a prefix */
+	if (ret > len)
+		ret = len;
+out:
+	kfree(line);
 	return ret;
 }
 
 static const struct file_operations kmsg_fops = {
-	.write = kmsg_write,
+	.aio_write = kmsg_writev,
 	.llseek = noop_llseek,
 };
 
diff --git a/drivers/char/raw.c b/drivers/char/raw.c
index b4b9d5a47885..b33e8ea314ed 100644
--- a/drivers/char/raw.c
+++ b/drivers/char/raw.c
@@ -21,6 +21,7 @@
 #include <linux/mutex.h>
 #include <linux/gfp.h>
 #include <linux/compat.h>
+#include <linux/vmalloc.h>
 
 #include <asm/uaccess.h>
 
@@ -30,10 +31,15 @@ struct raw_device_data {
 };
 
 static struct class *raw_class;
-static struct raw_device_data raw_devices[MAX_RAW_MINORS];
+static struct raw_device_data *raw_devices;
 static DEFINE_MUTEX(raw_mutex);
 static const struct file_operations raw_ctl_fops; /* forward declaration */
 
+static int max_raw_minors = MAX_RAW_MINORS;
+
+module_param(max_raw_minors, int, 0);
+MODULE_PARM_DESC(max_raw_minors, "Maximum number of raw devices (1-65536)");
+
 /*
  * Open/close code for raw IO.
  *
@@ -125,7 +131,7 @@ static int bind_set(int number, u64 major, u64 minor)
 	struct raw_device_data *rawdev;
 	int err = 0;
 
-	if (number <= 0 || number >= MAX_RAW_MINORS)
+	if (number <= 0 || number >= max_raw_minors)
 		return -EINVAL;
 
 	if (MAJOR(dev) != major || MINOR(dev) != minor)
@@ -312,14 +318,27 @@ static int __init raw_init(void)
 	dev_t dev = MKDEV(RAW_MAJOR, 0);
 	int ret;
 
-	ret = register_chrdev_region(dev, MAX_RAW_MINORS, "raw");
+	if (max_raw_minors < 1 || max_raw_minors > 65536) {
+		printk(KERN_WARNING "raw: invalid max_raw_minors (must be"
+			" between 1 and 65536), using %d\n", MAX_RAW_MINORS);
+		max_raw_minors = MAX_RAW_MINORS;
+	}
+
+	raw_devices = vmalloc(sizeof(struct raw_device_data) * max_raw_minors);
+	if (!raw_devices) {
+		printk(KERN_ERR "Not enough memory for raw device structures\n");
+		ret = -ENOMEM;
+		goto error;
+	}
+	memset(raw_devices, 0, sizeof(struct raw_device_data) * max_raw_minors);
+
+	ret = register_chrdev_region(dev, max_raw_minors, "raw");
 	if (ret)
 		goto error;
 
 	cdev_init(&raw_cdev, &raw_fops);
-	ret = cdev_add(&raw_cdev, dev, MAX_RAW_MINORS);
+	ret = cdev_add(&raw_cdev, dev, max_raw_minors);
 	if (ret) {
-		kobject_put(&raw_cdev.kobj);
 		goto error_region;
 	}
 
@@ -336,8 +355,9 @@ static int __init raw_init(void)
 	return 0;
 
 error_region:
-	unregister_chrdev_region(dev, MAX_RAW_MINORS);
+	unregister_chrdev_region(dev, max_raw_minors);
 error:
+	vfree(raw_devices);
 	return ret;
 }
 
@@ -346,7 +366,7 @@ static void __exit raw_exit(void)
 	device_destroy(raw_class, MKDEV(RAW_MAJOR, 0));
 	class_destroy(raw_class);
 	cdev_del(&raw_cdev);
-	unregister_chrdev_region(MKDEV(RAW_MAJOR, 0), MAX_RAW_MINORS);
+	unregister_chrdev_region(MKDEV(RAW_MAJOR, 0), max_raw_minors);
 }
 
 module_init(raw_init);
diff --git a/drivers/char/xilinx_hwicap/xilinx_hwicap.c b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
index d6412c16385f..39ccdeada791 100644
--- a/drivers/char/xilinx_hwicap/xilinx_hwicap.c
+++ b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
@@ -715,13 +715,13 @@ static int __devexit hwicap_remove(struct device *dev)
 }
 
 #ifdef CONFIG_OF
-static int __devinit hwicap_of_probe(struct platform_device *op)
+static int __devinit hwicap_of_probe(struct platform_device *op,
+				     const struct hwicap_driver_config *config)
 {
 	struct resource res;
 	const unsigned int *id;
 	const char *family;
 	int rc;
-	const struct hwicap_driver_config *config = op->dev.of_match->data;
 	const struct config_registers *regs;
 
 
@@ -751,20 +751,24 @@ static int __devinit hwicap_of_probe(struct platform_device *op)
 			regs);
 }
 #else
-static inline int hwicap_of_probe(struct platform_device *op)
+static inline int hwicap_of_probe(struct platform_device *op,
+				  const struct hwicap_driver_config *config)
 {
 	return -EINVAL;
 }
 #endif /* CONFIG_OF */
 
+static const struct of_device_id __devinitconst hwicap_of_match[];
 static int __devinit hwicap_drv_probe(struct platform_device *pdev)
 {
+	const struct of_device_id *match;
 	struct resource *res;
 	const struct config_registers *regs;
 	const char *family;
 
-	if (pdev->dev.of_match)
-		return hwicap_of_probe(pdev);
+	match = of_match_device(hwicap_of_match, &pdev->dev);
+	if (match)
+		return hwicap_of_probe(pdev, match->data);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res)