diff --git a/arch/parisc/hpux/fs.c b/arch/parisc/hpux/fs.c
index 2d58b92b57e368094635d1d4431bdcb782ed6d40..4204cd1f3cf9c2f3fce7769b51e606278055635e 100644
--- a/arch/parisc/hpux/fs.c
+++ b/arch/parisc/hpux/fs.c
@@ -73,7 +73,7 @@ struct getdents_callback {
 #define ROUND_UP(x) (((x)+sizeof(long)-1) & ~(sizeof(long)-1))
 
 static int filldir(void * __buf, const char * name, int namlen, loff_t offset,
-		ino_t ino, unsigned d_type)
+		u64 ino, unsigned d_type)
 {
 	struct hpux_dirent * dirent;
 	struct getdents_callback * buf = (struct getdents_callback *) __buf;
diff --git a/arch/parisc/kernel/drivers.c b/arch/parisc/kernel/drivers.c
index 3d569a485a1a6540735f282eb87879705fd4574c..2b257e4f17df28da51a9495d4beeaf9efcf72885 100644
--- a/arch/parisc/kernel/drivers.c
+++ b/arch/parisc/kernel/drivers.c
@@ -424,7 +424,10 @@ struct parisc_device * create_tree_node(char id, struct device *parent)
 	/* make the generic dma mask a pointer to the parisc one */
 	dev->dev.dma_mask = &dev->dma_mask;
 	dev->dev.coherent_dma_mask = dev->dma_mask;
-	device_register(&dev->dev);
+	if (!device_register(&dev->dev)) {
+		kfree(dev);
+		return NULL;
+	}
 
 	return dev;
 }
@@ -850,8 +853,10 @@ static void print_parisc_device(struct parisc_device *dev)
  */
 void init_parisc_bus(void)
 {
-	bus_register(&parisc_bus_type);
-	device_register(&root);
+	if (!bus_register(&parisc_bus_type))
+		panic("Could not register PA-RISC bus type\n");
+	if (!device_register(&root))
+		panic("Could not register PA-RISC root device\n");
 	get_device(&root);
 }
 
diff --git a/arch/parisc/kernel/pci.c b/arch/parisc/kernel/pci.c
index d3b8fc52dfc1e130a2c9a6e621116c62ed8a74f7..199887a61c765dea150132dc9d870b9c14a0e9f6 100644
--- a/arch/parisc/kernel/pci.c
+++ b/arch/parisc/kernel/pci.c
@@ -290,7 +290,7 @@ EXPORT_SYMBOL(pcibios_bus_to_resource);
 void pcibios_align_resource(void *data, struct resource *res,
 				resource_size_t size, resource_size_t alignment)
 {
-	unsigned long mask, align;
+	resource_size_t mask, align;
 
 	DBG_RES("pcibios_align_resource(%s, (%p) [%lx,%lx]/%x, 0x%lx, 0x%lx)\n",
 		pci_name(((struct pci_dev *) data)),
diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
index 1db5588ceacf7474ebba8d947b6b7c31da09a906..512642d8f707ce7208a99b5c0e2136c02c065c5e 100644
--- a/arch/parisc/kernel/sys_parisc.c
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -266,30 +266,17 @@ long parisc_personality(unsigned long personality)
 	return err;
 }
 
-static inline int override_machine(char __user *mach) {
-#ifdef CONFIG_COMPAT
-	if (personality(current->personality) == PER_LINUX32) {
-		if (__put_user(0, mach + 6) ||
-		    __put_user(0, mach + 7))
-			return -EFAULT;
-	}
-
-	return 0;
-#else /*!CONFIG_COMPAT*/
-	return 0;
-#endif /*CONFIG_COMPAT*/
-}
-
-long parisc_newuname(struct new_utsname __user *utsname)
+long parisc_newuname(struct new_utsname __user *name)
 {
-	int err = 0;
+	int err = sys_newuname(name);
 
-	down_read(&uts_sem);
-	if (copy_to_user(utsname, &system_utsname, sizeof(*utsname)))
-		err = -EFAULT;
-	up_read(&uts_sem);
-
-	err = override_machine(utsname->machine);
+#ifdef CONFIG_COMPAT
+	if (!err && personality(current->personality) == PER_LINUX32) {
+		if (__put_user(0, name->machine + 6) ||
+		    __put_user(0, name->machine + 7))
+			err = -EFAULT;
+	}
+#endif
 
-	return (long)err;
+	return err;
 }
diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c
index e3b30bc36453a0d05b830c3d9967de27112ab0c3..29be4377aca6c0fb1e2cebd00d4fba4556efdc01 100644
--- a/arch/parisc/kernel/sys_parisc32.c
+++ b/arch/parisc/kernel/sys_parisc32.c
@@ -111,13 +111,14 @@ struct __sysctl_args32 {
 
 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
 {
+#ifndef CONFIG_SYSCTL_SYSCALL
+	return -ENOSYS;
+#else
 	struct __sysctl_args32 tmp;
 	int error;
 	unsigned int oldlen32;
-	size_t oldlen, *oldlenp = NULL;
+	size_t oldlen, __user *oldlenp = NULL;
 	unsigned long addr = (((long __force)&args->__unused[0]) + 7) & ~7;
-	extern int do_sysctl(int *name, int nlen, void *oldval, size_t *oldlenp,
-	       void *newval, size_t newlen);
 
 	DBG(("sysctl32(%p)\n", args));
 
@@ -144,8 +145,9 @@ asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
 	}
 
 	lock_kernel();
-	error = do_sysctl((int *)(u64)tmp.name, tmp.nlen, (void *)(u64)tmp.oldval,
-			  oldlenp, (void *)(u64)tmp.newval, tmp.newlen);
+	error = do_sysctl((int __user *)(u64)tmp.name, tmp.nlen,
+			  (void __user *)(u64)tmp.oldval, oldlenp,
+			  (void __user *)(u64)tmp.newval, tmp.newlen);
 	unlock_kernel();
 	if (oldlenp) {
 		if (!error) {
@@ -157,10 +159,11 @@ asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
 					error = -EFAULT;
 			}
 		}
-		if (copy_to_user(&args->__unused[0], tmp.__unused, sizeof(tmp.__unused)))
+		if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
 			error = -EFAULT;
 	}
 	return error;
+#endif
 }
 
 #endif /* CONFIG_SYSCTL */
@@ -310,9 +313,8 @@ struct readdir32_callback {
 
 #define ROUND_UP(x,a)	((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1)))
 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
-static int
-filldir32 (void *__buf, const char *name, int namlen, loff_t offset, ino_t ino,
-	   unsigned int d_type)
+static int filldir32 (void *__buf, const char *name, int namlen,
+			loff_t offset, u64 ino, unsigned int d_type)
 {
 	struct linux32_dirent __user * dirent;
 	struct getdents32_callback * buf = (struct getdents32_callback *) __buf;
@@ -374,9 +376,8 @@ sys32_getdents (unsigned int fd, void __user * dirent, unsigned int count)
 	return error;
 }
 
-static int
-fillonedir32 (void * __buf, const char * name, int namlen, loff_t offset, ino_t ino,
-	      unsigned int d_type)
+static int fillonedir32(void * __buf, const char * name, int namlen,
+			loff_t offset, u64 ino, unsigned int d_type)
 {
 	struct readdir32_callback * buf = (struct readdir32_callback *) __buf;
 	struct old_linux32_dirent __user * dirent;
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index b3496b592a2d7db687793899388a4db9ce73f064..1d58ce0e37ad7b6b24daabe182913fe3b101ee29 100644
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -38,11 +38,28 @@ static unsigned long clocktick __read_mostly;	/* timer cycles per tick */
 extern void smp_do_timer(struct pt_regs *regs);
 #endif
 
+/*
+ * We keep time on PA-RISC Linux by using the Interval Timer which is
+ * a pair of registers; one is read-only and one is write-only; both
+ * accessed through CR16.  The read-only register is 32 or 64 bits wide,
+ * and increments by 1 every CPU clock tick.  The architecture only
+ * guarantees us a rate between 0.5 and 2, but all implementations use a
+ * rate of 1.  The write-only register is 32-bits wide.  When the lowest
+ * 32 bits of the read-only register compare equal to the write-only
+ * register, it raises a maskable external interrupt.  Each processor has
+ * an Interval Timer of its own and they are not synchronised.  
+ *
+ * We want to generate an interrupt every 1/HZ seconds.  So we program
+ * CR16 to interrupt every @clocktick cycles.  The it_value in cpu_data
+ * is programmed with the intended time of the next tick.  We can be
+ * held off for an arbitrarily long period of time by interrupts being
+ * disabled, so we may miss one or more ticks.
+ */
 irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 {
 	unsigned long now;
 	unsigned long next_tick;
-	unsigned long cycles_elapsed;
+	unsigned long cycles_elapsed, ticks_elapsed;
 	unsigned long cycles_remainder;
 	unsigned int cpu = smp_processor_id();
 
@@ -67,11 +84,14 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 		 * of the more expensive div/mul method
 		 */
 		cycles_remainder = cycles_elapsed;
+		ticks_elapsed = 1;
 		while (cycles_remainder > cpt) {
 			cycles_remainder -= cpt;
+			ticks_elapsed++;
 		}
 	} else {
 		cycles_remainder = cycles_elapsed % cpt;
+		ticks_elapsed = 1 + cycles_elapsed / cpt;
 	}
 
 	/* Can we differentiate between "early CR16" (aka Scenario 1) and
@@ -81,18 +101,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 	 * cycles after the IT fires. But it's arbitrary how much time passes
 	 * before we call it "late". I've picked one second.
 	 */
-/* aproximate HZ with shifts. Intended math is "(elapsed/clocktick) > HZ" */
-#if HZ == 1000
-	if (cycles_elapsed > (cpt << 10) )
-#elif HZ == 250
-	if (cycles_elapsed > (cpt << 8) )
-#elif HZ == 100
-	if (cycles_elapsed > (cpt << 7) )
-#else
-#warn WTF is HZ set to anyway?
-	if (cycles_elapsed > (HZ * cpt) )
-#endif
-	{
+	if (ticks_elapsed > HZ) {
 		/* Scenario 3: very long delay?  bad in any case */
 		printk (KERN_CRIT "timer_interrupt(CPU %d): delayed!"
 			" cycles %lX rem %lX "
@@ -136,7 +145,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 #endif
 	if (cpu == 0) {
 		write_seqlock(&xtime_lock);
-		do_timer(regs);
+		do_timer(ticks_elapsed);
 		write_sequnlock(&xtime_lock);
 	}
 
diff --git a/drivers/parisc/sba_iommu.c b/drivers/parisc/sba_iommu.c
index 294c1117098d69d6a0a9c13e26cd9f4727fbf528..f1e7ccd5475bb413888272112e1937d67e4d5f36 100644
--- a/drivers/parisc/sba_iommu.c
+++ b/drivers/parisc/sba_iommu.c
@@ -1320,12 +1320,12 @@ sba_ioc_init_pluto(struct parisc_device *sba, struct ioc *ioc, int ioc_num)
 	** the GART code to handshake on.
 	*/
 	klist_iter_init(&sba->dev.klist_children, &i);
-	while (dev = next_device(&i)) {
+	while ((dev = next_device(&i))) {
 		struct parisc_device *lba = to_parisc_device(dev);
 		if (IS_QUICKSILVER(lba))
 			agp_found = 1;
 	}
-	klist_iter_exit(&sba->dev.klist_children, &i);
+	klist_iter_exit(&i);
 
 	if (agp_found && sba_reserve_agpgart) {
 		printk(KERN_INFO "%s: reserving %dMb of IOVA space for agpgart\n",