Merge branch 'master' into for-next

37 files changed, 1159 insertions, 688 deletions

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index e21175be25d..7cfcc629a7f 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -1121,5 +1121,13 @@ config DEVPORT
 
 source "drivers/s390/char/Kconfig"
 
+config RAMOOPS
+	tristate "Log panic/oops to a RAM buffer"
+	depends on HAS_IOMEM
+	default n
+	help
+	  This enables panic and oops messages to be logged to a circular
+	  buffer in RAM where it can be read back at some later point.
+
 endmenu
 
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index d39be4cf1f5..88d6eac6975 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -108,6 +108,7 @@ obj-$(CONFIG_HANGCHECK_TIMER)	+= hangcheck-timer.o
 obj-$(CONFIG_TCG_TPM)		+= tpm/
 
 obj-$(CONFIG_PS3_FLASH)		+= ps3flash.o
+obj-$(CONFIG_RAMOOPS)		+= ramoops.o
 
 obj-$(CONFIG_JS_RTC)		+= js-rtc.o
 js-rtc-y = rtc.o
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index 67ea3a60de7..70312da4c96 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -384,7 +384,7 @@ static int __devinit uli_agp_init(struct pci_dev *pdev)
 {
 	u32 httfea,baseaddr,enuscr;
 	struct pci_dev *dev1;
-	int i;
+	int i, ret;
 	unsigned size = amd64_fetch_size();
 
 	dev_info(&pdev->dev, "setting up ULi AGP\n");
@@ -400,15 +400,18 @@ static int __devinit uli_agp_init(struct pci_dev *pdev)
 
 	if (i == ARRAY_SIZE(uli_sizes)) {
 		dev_info(&pdev->dev, "no ULi size found for %d\n", size);
-		return -ENODEV;
+		ret = -ENODEV;
+		goto put;
 	}
 
 	/* shadow x86-64 registers into ULi registers */
 	pci_read_config_dword (k8_northbridges[0], AMD64_GARTAPERTUREBASE, &httfea);
 
 	/* if x86-64 aperture base is beyond 4G, exit here */
-	if ((httfea & 0x7fff) >> (32 - 25))
-		return -ENODEV;
+	if ((httfea & 0x7fff) >> (32 - 25)) {
+		ret = -ENODEV;
+		goto put;
+	}
 
 	httfea = (httfea& 0x7fff) << 25;
 
@@ -420,9 +423,10 @@ static int __devinit uli_agp_init(struct pci_dev *pdev)
 	enuscr= httfea+ (size * 1024 * 1024) - 1;
 	pci_write_config_dword(dev1, ULI_X86_64_HTT_FEA_REG, httfea);
 	pci_write_config_dword(dev1, ULI_X86_64_ENU_SCR_REG, enuscr);
-
+	ret = 0;
+put:
 	pci_dev_put(dev1);
-	return 0;
+	return ret;
 }
 
 
@@ -441,7 +445,7 @@ static int nforce3_agp_init(struct pci_dev *pdev)
 {
 	u32 tmp, apbase, apbar, aplimit;
 	struct pci_dev *dev1;
-	int i;
+	int i, ret;
 	unsigned size = amd64_fetch_size();
 
 	dev_info(&pdev->dev, "setting up Nforce3 AGP\n");
@@ -458,7 +462,8 @@ static int nforce3_agp_init(struct pci_dev *pdev)
 
 	if (i == ARRAY_SIZE(nforce3_sizes)) {
 		dev_info(&pdev->dev, "no NForce3 size found for %d\n", size);
-		return -ENODEV;
+		ret = -ENODEV;
+		goto put;
 	}
 
 	pci_read_config_dword(dev1, NVIDIA_X86_64_1_APSIZE, &tmp);
@@ -472,7 +477,8 @@ static int nforce3_agp_init(struct pci_dev *pdev)
 	/* if x86-64 aperture base is beyond 4G, exit here */
 	if ( (apbase & 0x7fff) >> (32 - 25) ) {
 		dev_info(&pdev->dev, "aperture base > 4G\n");
-		return -ENODEV;
+		ret = -ENODEV;
+		goto put;
 	}
 
 	apbase = (apbase & 0x7fff) << 25;
@@ -488,9 +494,11 @@ static int nforce3_agp_init(struct pci_dev *pdev)
 	pci_write_config_dword(dev1, NVIDIA_X86_64_1_APBASE2, apbase);
 	pci_write_config_dword(dev1, NVIDIA_X86_64_1_APLIMIT2, aplimit);
 
+	ret = 0;
+put:
 	pci_dev_put(dev1);
 
-	return 0;
+	return ret;
 }
 
 static int __devinit agp_amd64_probe(struct pci_dev *pdev,
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index e8ea6825822..9344216183a 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -1059,7 +1059,7 @@ static void intel_i9xx_setup_flush(void)
 	}
 }
 
-static int intel_i915_configure(void)
+static int intel_i9xx_configure(void)
 {
 	struct aper_size_info_fixed *current_size;
 	u32 temp;
@@ -1207,6 +1207,38 @@ static int intel_i9xx_fetch_size(void)
 	return 0;
 }
 
+static int intel_i915_get_gtt_size(void)
+{
+	int size;
+
+	if (IS_G33) {
+		u16 gmch_ctrl;
+
+		/* G33's GTT size defined in gmch_ctrl */
+		pci_read_config_word(agp_bridge->dev, I830_GMCH_CTRL, &gmch_ctrl);
+		switch (gmch_ctrl & G33_PGETBL_SIZE_MASK) {
+		case G33_PGETBL_SIZE_1M:
+			size = 1024;
+			break;
+		case G33_PGETBL_SIZE_2M:
+			size = 2048;
+			break;
+		default:
+			dev_info(&agp_bridge->dev->dev,
+				 "unknown page table size 0x%x, assuming 512KB\n",
+				(gmch_ctrl & G33_PGETBL_SIZE_MASK));
+			size = 512;
+		}
+	} else {
+		/* On previous hardware, the GTT size was just what was
+		 * required to map the aperture.
+		 */
+		size = agp_bridge->driver->fetch_size();
+	}
+
+	return KB(size);
+}
+
 /* The intel i915 automatically initializes the agp aperture during POST.
  * Use the memory already set aside for in the GTT.
  */
@@ -1216,7 +1248,7 @@ static int intel_i915_create_gatt_table(struct agp_bridge_data *bridge)
 	struct aper_size_info_fixed *size;
 	int num_entries;
 	u32 temp, temp2;
-	int gtt_map_size = 256 * 1024;
+	int gtt_map_size;
 
 	size = agp_bridge->current_size;
 	page_order = size->page_order;
@@ -1226,8 +1258,8 @@ static int intel_i915_create_gatt_table(struct agp_bridge_data *bridge)
 	pci_read_config_dword(intel_private.pcidev, I915_MMADDR, &temp);
 	pci_read_config_dword(intel_private.pcidev, I915_PTEADDR, &temp2);
 
-	if (IS_G33)
-	    gtt_map_size = 1024 * 1024; /* 1M on G33 */
+	gtt_map_size = intel_i915_get_gtt_size();
+
 	intel_private.gtt = ioremap(temp2, gtt_map_size);
 	if (!intel_private.gtt)
 		return -ENOMEM;
@@ -1422,7 +1454,7 @@ static const struct agp_bridge_driver intel_915_driver = {
 	.size_type		= FIXED_APER_SIZE,
 	.num_aperture_sizes	= 4,
 	.needs_scratch_page	= true,
-	.configure		= intel_i915_configure,
+	.configure		= intel_i9xx_configure,
 	.fetch_size		= intel_i9xx_fetch_size,
 	.cleanup		= intel_i915_cleanup,
 	.mask_memory		= intel_i810_mask_memory,
@@ -1455,7 +1487,7 @@ static const struct agp_bridge_driver intel_i965_driver = {
 	.size_type		= FIXED_APER_SIZE,
 	.num_aperture_sizes	= 4,
 	.needs_scratch_page	= true,
-	.configure		= intel_i915_configure,
+	.configure		= intel_i9xx_configure,
 	.fetch_size		= intel_i9xx_fetch_size,
 	.cleanup		= intel_i915_cleanup,
 	.mask_memory		= intel_i965_mask_memory,
@@ -1488,7 +1520,7 @@ static const struct agp_bridge_driver intel_g33_driver = {
 	.size_type		= FIXED_APER_SIZE,
 	.num_aperture_sizes	= 4,
 	.needs_scratch_page	= true,
-	.configure		= intel_i915_configure,
+	.configure		= intel_i9xx_configure,
 	.fetch_size		= intel_i9xx_fetch_size,
 	.cleanup		= intel_i915_cleanup,
 	.mask_memory		= intel_i965_mask_memory,
diff --git a/drivers/char/agp/uninorth-agp.c b/drivers/char/agp/uninorth-agp.c
index 95db71360d2..f845a8f718b 100644
--- a/drivers/char/agp/uninorth-agp.c
+++ b/drivers/char/agp/uninorth-agp.c
@@ -415,7 +415,7 @@ static int uninorth_create_gatt_table(struct agp_bridge_data *bridge)
 	bridge->gatt_table_real = (u32 *) table;
 	/* Need to clear out any dirty data still sitting in caches */
 	flush_dcache_range((unsigned long)table,
-			   (unsigned long)(table_end + PAGE_SIZE));
+			   (unsigned long)table_end + 1);
 	bridge->gatt_table = vmap(pages, (1 << page_order), 0, PAGE_KERNEL_NCG);
 
 	if (bridge->gatt_table == NULL)
diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index 56b27671adc..4f8d60c25a9 100644
--- a/drivers/char/amiserial.c
+++ b/drivers/char/amiserial.c
@@ -84,6 +84,7 @@ static char *serial_version = "4.30";
 #include <linux/smp_lock.h>
 #include <linux/init.h>
 #include <linux/bitops.h>
+#include <linux/platform_device.h>
 
 #include <asm/setup.h>
 
@@ -1954,29 +1955,16 @@ static const struct tty_operations serial_ops = {
 /*
  * The serial driver boot-time initialization code!
  */
-static int __init rs_init(void)
+static int __init amiga_serial_probe(struct platform_device *pdev)
 {
 	unsigned long flags;
 	struct serial_state * state;
 	int error;
 
-	if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(AMI_SERIAL))
-		return -ENODEV;
-
 	serial_driver = alloc_tty_driver(1);
 	if (!serial_driver)
 		return -ENOMEM;
 
-	/*
-	 *  We request SERDAT and SERPER only, because the serial registers are
-	 *  too spreaded over the custom register space
-	 */
-	if (!request_mem_region(CUSTOM_PHYSADDR+0x30, 4,
-				"amiserial [Paula]")) {
-		error = -EBUSY;
-		goto fail_put_tty_driver;
-	}
-
 	IRQ_ports = NULL;
 
 	show_serial_version();
@@ -1998,7 +1986,7 @@ static int __init rs_init(void)
 
 	error = tty_register_driver(serial_driver);
 	if (error)
-		goto fail_release_mem_region;
+		goto fail_put_tty_driver;
 
 	state = rs_table;
 	state->magic = SSTATE_MAGIC;
@@ -2050,23 +2038,24 @@ static int __init rs_init(void)
 	ciab.ddra |= (SER_DTR | SER_RTS);   /* outputs */
 	ciab.ddra &= ~(SER_DCD | SER_CTS | SER_DSR);  /* inputs */
 
+	platform_set_drvdata(pdev, state);
+
 	return 0;
 
 fail_free_irq:
 	free_irq(IRQ_AMIGA_TBE, state);
 fail_unregister:
 	tty_unregister_driver(serial_driver);
-fail_release_mem_region:
-	release_mem_region(CUSTOM_PHYSADDR+0x30, 4);
 fail_put_tty_driver:
 	put_tty_driver(serial_driver);
 	return error;
 }
 
-static __exit void rs_exit(void) 
+static int __exit amiga_serial_remove(struct platform_device *pdev)
 {
 	int error;
-	struct async_struct *info = rs_table[0].info;
+	struct serial_state *state = platform_get_drvdata(pdev);
+	struct async_struct *info = state->info;
 
 	/* printk("Unloading %s: version %s\n", serial_name, serial_version); */
 	tasklet_kill(&info->tlet);
@@ -2075,19 +2064,38 @@ static __exit void rs_exit(void)
 		       error);
 	put_tty_driver(serial_driver);
 
-	if (info) {
-	  rs_table[0].info = NULL;
-	  kfree(info);
-	}
+	rs_table[0].info = NULL;
+	kfree(info);
 
 	free_irq(IRQ_AMIGA_TBE, rs_table);
 	free_irq(IRQ_AMIGA_RBF, rs_table);
 
-	release_mem_region(CUSTOM_PHYSADDR+0x30, 4);
+	platform_set_drvdata(pdev, NULL);
+
+	return error;
+}
+
+static struct platform_driver amiga_serial_driver = {
+	.remove = __exit_p(amiga_serial_remove),
+	.driver   = {
+		.name	= "amiga-serial",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init amiga_serial_init(void)
+{
+	return platform_driver_probe(&amiga_serial_driver, amiga_serial_probe);
+}
+
+module_init(amiga_serial_init);
+
+static void __exit amiga_serial_exit(void)
+{
+	platform_driver_unregister(&amiga_serial_driver);
 }
 
-module_init(rs_init)
-module_exit(rs_exit)
+module_exit(amiga_serial_exit);
 
 
 #if defined(CONFIG_SERIAL_CONSOLE) && !defined(MODULE)
@@ -2154,3 +2162,4 @@ console_initcall(amiserial_console_init);
 #endif /* CONFIG_SERIAL_CONSOLE && !MODULE */
 
 MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:amiga-serial");
diff --git a/drivers/char/apm-emulation.c b/drivers/char/apm-emulation.c
index 4f568cb9af3..033e1505fca 100644
--- a/drivers/char/apm-emulation.c
+++ b/drivers/char/apm-emulation.c
@@ -265,8 +265,8 @@ static unsigned int apm_poll(struct file *fp, poll_table * wait)
  *   Only when everyone who has opened /dev/apm_bios with write permission
  *   has acknowledge does the actual suspend happen.
  */
-static int
-apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg)
+static long
+apm_ioctl(struct file *filp, u_int cmd, u_long arg)
 {
 	struct apm_user *as = filp->private_data;
 	int err = -EINVAL;
@@ -274,6 +274,7 @@ apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg)
 	if (!as->suser || !as->writer)
 		return -EPERM;
 
+	lock_kernel();
 	switch (cmd) {
 	case APM_IOC_SUSPEND:
 		mutex_lock(&state_lock);
@@ -334,6 +335,7 @@ apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg)
 		mutex_unlock(&state_lock);
 		break;
 	}
+	unlock_kernel();
 
 	return err;
 }
@@ -397,7 +399,7 @@ static const struct file_operations apm_bios_fops = {
 	.owner		= THIS_MODULE,
 	.read		= apm_read,
 	.poll		= apm_poll,
-	.ioctl		= apm_ioctl,
+	.unlocked_ioctl	= apm_ioctl,
 	.open		= apm_open,
 	.release	= apm_release,
 };
diff --git a/drivers/char/applicom.c b/drivers/char/applicom.c
index a7424bf7eac..f4ae0e0fb63 100644
--- a/drivers/char/applicom.c
+++ b/drivers/char/applicom.c
@@ -26,6 +26,7 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/errno.h>
+#include <linux/smp_lock.h>
 #include <linux/miscdevice.h>
 #include <linux/pci.h>
 #include <linux/wait.h>
@@ -106,8 +107,7 @@ static unsigned int DeviceErrorCount;	/* number of device error     */
 
 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
-static int ac_ioctl(struct inode *, struct file *, unsigned int,
-		    unsigned long);
+static long ac_ioctl(struct file *, unsigned int, unsigned long);
 static irqreturn_t ac_interrupt(int, void *);
 
 static const struct file_operations ac_fops = {
@@ -115,7 +115,7 @@ static const struct file_operations ac_fops = {
 	.llseek = no_llseek,
 	.read = ac_read,
 	.write = ac_write,
-	.ioctl = ac_ioctl,
+	.unlocked_ioctl = ac_ioctl,
 };
 
 static struct miscdevice ac_miscdev = {
@@ -689,7 +689,7 @@ static irqreturn_t ac_interrupt(int vec, void *dev_instance)
 
 
 
-static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
      
 {				/* @ ADG ou ATO selon le cas */
 	int i;
@@ -703,15 +703,11 @@ static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, un
 	/* In general, the device is only openable by root anyway, so we're not
 	   particularly concerned that bogus ioctls can flood the console. */
 
-	adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
-	if (!adgl)
-		return -ENOMEM;
+	adgl = memdup_user(argp, sizeof(struct st_ram_io));
+	if (IS_ERR(adgl))
+		return PTR_ERR(adgl);
 
-	if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
-		kfree(adgl);
-		return -EFAULT;
-	}
-	
+	lock_kernel();	
 	IndexCard = adgl->num_card-1;
 	 
 	if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
@@ -721,6 +717,7 @@ static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, un
 			warncount--;
 		}
 		kfree(adgl);
+		unlock_kernel();
 		return -EINVAL;
 	}
 
@@ -838,6 +835,7 @@ static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, un
 	}
 	Dummy = readb(apbs[IndexCard].RamIO + VERS);
 	kfree(adgl);
+	unlock_kernel();
 	return 0;
 }
 
diff --git a/drivers/char/ds1620.c b/drivers/char/ds1620.c
index 61f0146e215..dbee8688f75 100644
--- a/drivers/char/ds1620.c
+++ b/drivers/char/ds1620.c
@@ -232,7 +232,7 @@ ds1620_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
 }
 
 static int
-ds1620_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+ds1620_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	struct therm therm;
 	union {
@@ -316,6 +316,18 @@ ds1620_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned
 	return 0;
 }
 
+static long
+ds1620_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	int ret;
+
+	lock_kernel();
+	ret = ds1620_ioctl(file, cmd, arg);
+	unlock_kernel();
+
+	return ret;
+}
+
 #ifdef THERM_USE_PROC
 static int
 proc_therm_ds1620_read(char *buf, char **start, off_t offset,
@@ -344,7 +356,7 @@ static const struct file_operations ds1620_fops = {
 	.owner		= THIS_MODULE,
 	.open		= ds1620_open,
 	.read		= ds1620_read,
-	.ioctl		= ds1620_ioctl,
+	.unlocked_ioctl	= ds1620_unlocked_ioctl,
 };
 
 static struct miscdevice ds1620_miscdev = {
diff --git a/drivers/char/dtlk.c b/drivers/char/dtlk.c
index 045c930e632..e3859d4eaea 100644
--- a/drivers/char/dtlk.c
+++ b/drivers/char/dtlk.c
@@ -93,8 +93,8 @@ static ssize_t dtlk_write(struct file *, const char __user *,
 static unsigned int dtlk_poll(struct file *, poll_table *);
 static int dtlk_open(struct inode *, struct file *);
 static int dtlk_release(struct inode *, struct file *);
-static int dtlk_ioctl(struct inode *inode, struct file *file,
-		      unsigned int cmd, unsigned long arg);
+static long dtlk_ioctl(struct file *file,
+		       unsigned int cmd, unsigned long arg);
 
 static const struct file_operations dtlk_fops =
 {
@@ -102,7 +102,7 @@ static const struct file_operations dtlk_fops =
 	.read		= dtlk_read,
 	.write		= dtlk_write,
 	.poll		= dtlk_poll,
-	.ioctl		= dtlk_ioctl,
+	.unlocked_ioctl	= dtlk_ioctl,
 	.open		= dtlk_open,
 	.release	= dtlk_release,
 };
@@ -263,10 +263,9 @@ static void dtlk_timer_tick(unsigned long data)
 	wake_up_interruptible(&dtlk_process_list);
 }
 
-static int dtlk_ioctl(struct inode *inode,
-		      struct file *file,
-		      unsigned int cmd,
-		      unsigned long arg)
+static long dtlk_ioctl(struct file *file,
+		       unsigned int cmd,
+		       unsigned long arg)
 {
 	char __user *argp = (char __user *)arg;
 	struct dtlk_settings *sp;
@@ -276,7 +275,9 @@ static int dtlk_ioctl(struct inode *inode,
 	switch (cmd) {
 
 	case DTLK_INTERROGATE:
+		lock_kernel();
 		sp = dtlk_interrogate();
+		unlock_kernel();
 		if (copy_to_user(argp, sp, sizeof(struct dtlk_settings)))
 			return -EINVAL;
 		return 0;
diff --git a/drivers/char/generic_nvram.c b/drivers/char/generic_nvram.c
index fda4181b5e6..82b5a88a82d 100644
--- a/drivers/char/generic_nvram.c
+++ b/drivers/char/generic_nvram.c
@@ -19,6 +19,7 @@
 #include <linux/miscdevice.h>
 #include <linux/fcntl.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/nvram.h>
 #ifdef CONFIG_PPC_PMAC
@@ -84,8 +85,7 @@ static ssize_t write_nvram(struct file *file, const char __user *buf,
 	return p - buf;
 }
 
-static int nvram_ioctl(struct inode *inode, struct file *file,
-	unsigned int cmd, unsigned long arg)
+static int nvram_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	switch(cmd) {
 #ifdef CONFIG_PPC_PMAC
@@ -116,12 +116,23 @@ static int nvram_ioctl(struct inode *inode, struct file *file,
 	return 0;
 }
 
+static long nvram_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	int ret;
+
+	lock_kernel();
+	ret = nvram_ioctl(file, cmd, arg);
+	unlock_kernel();
+
+	return ret;
+}
+
 const struct file_operations nvram_fops = {
 	.owner		= THIS_MODULE,
 	.llseek		= nvram_llseek,
 	.read		= read_nvram,
 	.write		= write_nvram,
-	.ioctl		= nvram_ioctl,
+	.unlocked_ioctl	= nvram_unlocked_ioctl,
 };
 
 static struct miscdevice nvram_dev = {
diff --git a/drivers/char/genrtc.c b/drivers/char/genrtc.c
index 31e7c91c2d9..b6c2cc167c1 100644
--- a/drivers/char/genrtc.c
+++ b/drivers/char/genrtc.c
@@ -262,7 +262,7 @@ static inline int gen_set_rtc_irq_bit(unsigned char bit)
 #endif
 }
 
-static int gen_rtc_ioctl(struct inode *inode, struct file *file,
+static int gen_rtc_ioctl(struct file *file,
 			 unsigned int cmd, unsigned long arg)
 {
 	struct rtc_time wtime;
@@ -332,6 +332,18 @@ static int gen_rtc_ioctl(struct inode *inode, struct file *file,
 	return -EINVAL;
 }
 
+static long gen_rtc_unlocked_ioctl(struct file *file, unsigned int cmd,
+				   unsigned long arg)
+{
+	int ret;
+
+	lock_kernel();
+	ret = gen_rtc_ioctl(file, cmd, arg);
+	unlock_kernel();
+
+	return ret;
+}
+
 /*
  *	We enforce only one user at a time here with the open/close.
  *	Also clear the previous interrupt data on an open, and clean
@@ -482,7 +494,7 @@ static const struct file_operations gen_rtc_fops = {
 	.read		= gen_rtc_read,
 	.poll		= gen_rtc_poll,
 #endif
-	.ioctl		= gen_rtc_ioctl,
+	.unlocked_ioctl	= gen_rtc_unlocked_ioctl,
 	.open		= gen_rtc_open,
 	.release	= gen_rtc_release,
 };
diff --git a/drivers/char/hangcheck-timer.c b/drivers/char/hangcheck-timer.c
index 712d9f271aa..e0249722d25 100644
--- a/drivers/char/hangcheck-timer.c
+++ b/drivers/char/hangcheck-timer.c
@@ -49,8 +49,9 @@
 #include <asm/uaccess.h>
 #include <linux/sysrq.h>
 #include <linux/timer.h>
+#include <linux/time.h>
 
-#define VERSION_STR "0.9.0"
+#define VERSION_STR "0.9.1"
 
 #define DEFAULT_IOFENCE_MARGIN 60	/* Default fudge factor, in seconds */
 #define DEFAULT_IOFENCE_TICK 180	/* Default timer timeout, in seconds */
@@ -119,10 +120,8 @@ __setup("hcheck_dump_tasks", hangcheck_parse_dump_tasks);
 #if defined(CONFIG_S390)
 # define HAVE_MONOTONIC
 # define TIMER_FREQ 1000000000ULL
-#elif defined(CONFIG_IA64)
-# define TIMER_FREQ ((unsigned long long)local_cpu_data->itc_freq)
 #else
-# define TIMER_FREQ (HZ*loops_per_jiffy)
+# define TIMER_FREQ 1000000000ULL
 #endif
 
 #ifdef HAVE_MONOTONIC
@@ -130,7 +129,9 @@ extern unsigned long long monotonic_clock(void);
 #else
 static inline unsigned long long monotonic_clock(void)
 {
-	return get_cycles();
+	struct timespec ts;
+	getrawmonotonic(&ts);
+	return timespec_to_ns(&ts);
 }
 #endif  /* HAVE_MONOTONIC */
 
@@ -168,6 +169,13 @@ static void hangcheck_fire(unsigned long data)
 			printk(KERN_CRIT "Hangcheck: hangcheck value past margin!\n");
 		}
 	}
+#if 0
+	/*
+	 * Enable to investigate delays in detail
+	 */
+	printk("Hangcheck: called %Ld ns since last time (%Ld ns overshoot)\n",
+			tsc_diff, tsc_diff - hangcheck_tick*TIMER_FREQ);
+#endif
 	mod_timer(&hangcheck_ticktock, jiffies + (hangcheck_tick*HZ));
 	hangcheck_tsc = monotonic_clock();
 }
@@ -180,7 +188,7 @@ static int __init hangcheck_init(void)
 #if defined (HAVE_MONOTONIC)
 	printk("Hangcheck: Using monotonic_clock().\n");
 #else
-	printk("Hangcheck: Using get_cycles().\n");
+	printk("Hangcheck: Using getrawmonotonic().\n");
 #endif  /* HAVE_MONOTONIC */
 	hangcheck_tsc_margin =
 		(unsigned long long)(hangcheck_margin + hangcheck_tick);
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index 9ded667625a..a0a1829d319 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -431,14 +431,18 @@ static int hpet_release(struct inode *inode, struct file *file)
 
 static int hpet_ioctl_common(struct hpet_dev *, int, unsigned long, int);
 
-static int
-hpet_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
-	   unsigned long arg)
+static long hpet_ioctl(struct file *file, unsigned int cmd,
+			unsigned long arg)
 {
 	struct hpet_dev *devp;
+	int ret;
 
 	devp = file->private_data;
-	return hpet_ioctl_common(devp, cmd, arg, 0);
+	lock_kernel();
+	ret = hpet_ioctl_common(devp, cmd, arg, 0);
+	unlock_kernel();
+
+	return ret;
 }
 
 static int hpet_ioctl_ieon(struct hpet_dev *devp)
@@ -654,7 +658,7 @@ static const struct file_operations hpet_fops = {
 	.llseek = no_llseek,
 	.read = hpet_read,
 	.poll = hpet_poll,
-	.ioctl = hpet_ioctl,
+	.unlocked_ioctl = hpet_ioctl,
 	.open = hpet_open,
 	.release = hpet_release,
 	.fasync = hpet_fasync,
diff --git a/drivers/char/hvsi.c b/drivers/char/hvsi.c
index 793b236c926..d4b14ff1c4c 100644
--- a/drivers/char/hvsi.c
+++ b/drivers/char/hvsi.c
@@ -194,10 +194,8 @@ static inline void print_state(struct hvsi_struct *hp)
 		"HVSI_WAIT_FOR_MCTRL_RESPONSE",
 		"HVSI_FSP_DIED",
 	};
-	const char *name = state_names[hp->state];
-
-	if (hp->state > ARRAY_SIZE(state_names))
-		name = "UNKNOWN";
+	const char *name = (hp->state < ARRAY_SIZE(state_names))
+		? state_names[hp->state] : "UNKNOWN";
 
 	pr_debug("hvsi%i: state = %s\n", hp->index, name);
 #endif /* DEBUG */
diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c
index 10f868eefaa..0f9cbf1aaf1 100644
--- a/drivers/char/hw_random/n2-drv.c
+++ b/drivers/char/hw_random/n2-drv.c
@@ -660,7 +660,7 @@ static