Merge branch 'sched/urgent' into sched/core

Merge reason: Merge dependent fix, update to latest -rc.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

15 files changed, 83 insertions, 60 deletions

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 31be3ac2e21..e023682be2c 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -669,7 +669,7 @@ config VIRTIO_CONSOLE
 
 config HVCS
 	tristate "IBM Hypervisor Virtual Console Server support"
-	depends on PPC_PSERIES
+	depends on PPC_PSERIES && HVC_CONSOLE
 	help
 	  Partitionable IBM Power5 ppc64 machines allow hosting of
 	  firmware virtual consoles from one Linux partition by
diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index 2fb2e6cc322..34cf04e2179 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -728,6 +728,7 @@ int __init agp_amd64_init(void)
 
 	if (agp_off)
 		return -EINVAL;
+
 	err = pci_register_driver(&agp_amd64_pci_driver);
 	if (err < 0)
 		return err;
@@ -764,19 +765,25 @@ int __init agp_amd64_init(void)
 	return err;
 }
 
+static int __init agp_amd64_mod_init(void)
+{
+	if (gart_iommu_aperture)
+		return agp_bridges_found ? 0 : -ENODEV;
+
+	return agp_amd64_init();
+}
+
 static void __exit agp_amd64_cleanup(void)
 {
+	if (gart_iommu_aperture)
+		return;
 	if (aperture_resource)
 		release_resource(aperture_resource);
 	pci_unregister_driver(&agp_amd64_pci_driver);
 }
 
-/* On AMD64 the PCI driver needs to initialize this driver early
-   for the IOMMU, so it has to be called via a backdoor. */
-#ifndef CONFIG_GART_IOMMU
-module_init(agp_amd64_init);
+module_init(agp_amd64_mod_init);
 module_exit(agp_amd64_cleanup);
-#endif
 
 MODULE_AUTHOR("Dave Jones <davej@redhat.com>, Andi Kleen");
 module_param(agp_try_unsupported, bool, 0);
diff --git a/drivers/char/agp/backend.c b/drivers/char/agp/backend.c
index a56ca080e10..c3ab46da51a 100644
--- a/drivers/char/agp/backend.c
+++ b/drivers/char/agp/backend.c
@@ -285,18 +285,22 @@ int agp_add_bridge(struct agp_bridge_data *bridge)
 {
 	int error;
 
-	if (agp_off)
-		return -ENODEV;
+	if (agp_off) {
+		error = -ENODEV;
+		goto err_put_bridge;
+	}
 
 	if (!bridge->dev) {
 		printk (KERN_DEBUG PFX "Erk, registering with no pci_dev!\n");
-		return -EINVAL;
+		error = -EINVAL;
+		goto err_put_bridge;
 	}
 
 	/* Grab reference on the chipset driver. */
 	if (!try_module_get(bridge->driver->owner)) {
 		dev_info(&bridge->dev->dev, "can't lock chipset driver\n");
-		return -EINVAL;
+		error = -EINVAL;
+		goto err_put_bridge;
 	}
 
 	error = agp_backend_initialize(bridge);
@@ -326,6 +330,7 @@ frontend_err:
 	agp_backend_cleanup(bridge);
 err_out:
 	module_put(bridge->driver->owner);
+err_put_bridge:
 	agp_put_bridge(bridge);
 	return error;
 }
diff --git a/drivers/char/agp/hp-agp.c b/drivers/char/agp/hp-agp.c
index 9047b271465..58752b70efe 100644
--- a/drivers/char/agp/hp-agp.c
+++ b/drivers/char/agp/hp-agp.c
@@ -488,9 +488,8 @@ zx1_gart_probe (acpi_handle obj, u32 depth, void *context, void **ret)
 	handle = obj;
 	do {
 		status = acpi_get_object_info(handle, &info);
-		if (ACPI_SUCCESS(status)) {
+		if (ACPI_SUCCESS(status) && (info->valid & ACPI_VALID_HID)) {
 			/* TBD check _CID also */
-			info->hardware_id.string[sizeof(info->hardware_id.length)-1] = '\0';
 			match = (strcmp(info->hardware_id.string, "HWP0001") == 0);
 			kfree(info);
 			if (match) {
@@ -509,6 +508,9 @@ zx1_gart_probe (acpi_handle obj, u32 depth, void *context, void **ret)
 		handle = parent;
 	} while (ACPI_SUCCESS(status));
 
+	if (ACPI_FAILURE(status))
+		return AE_OK;	/* found no enclosing IOC */
+
 	if (hp_zx1_setup(sba_hpa + HP_ZX1_IOC_OFFSET, lba_hpa))
 		return AE_OK;
 
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index 30c36ac2cd0..3999a5f25f3 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -2460,10 +2460,14 @@ static int __devinit agp_intel_probe(struct pci_dev *pdev,
 				&bridge->mode);
 	}
 
-	if (bridge->driver->mask_memory == intel_i965_mask_memory)
+	if (bridge->driver->mask_memory == intel_i965_mask_memory) {
 		if (pci_set_dma_mask(intel_private.pcidev, DMA_BIT_MASK(36)))
 			dev_err(&intel_private.pcidev->dev,
 				"set gfx device dma mask 36bit failed!\n");
+		else
+			pci_set_consistent_dma_mask(intel_private.pcidev,
+						    DMA_BIT_MASK(36));
+	}
 
 	pci_set_drvdata(pdev, bridge);
 	return agp_add_bridge(bridge);
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index e989f67bb61..3d9c61e5acb 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -158,10 +158,11 @@ static ssize_t rng_dev_read(struct file *filp, char __user *buf,
 			goto out;
 		}
 	}
-out_unlock:
-	mutex_unlock(&rng_mutex);
 out:
 	return ret ? : err;
+out_unlock:
+	mutex_unlock(&rng_mutex);
+	goto out;
 }
 
 
diff --git a/drivers/char/hw_random/virtio-rng.c b/drivers/char/hw_random/virtio-rng.c
index bdaef8e9402..64fe0a793ef 100644
--- a/drivers/char/hw_random/virtio-rng.c
+++ b/drivers/char/hw_random/virtio-rng.c
@@ -114,7 +114,7 @@ static struct virtio_device_id id_table[] = {
 	{ 0 },
 };
 
-static struct virtio_driver virtio_rng = {
+static struct virtio_driver virtio_rng_driver = {
 	.driver.name =	KBUILD_MODNAME,
 	.driver.owner =	THIS_MODULE,
 	.id_table =	id_table,
@@ -124,12 +124,12 @@ static struct virtio_driver virtio_rng = {
 
 static int __init init(void)
 {
-	return register_virtio_driver(&virtio_rng);
+	return register_virtio_driver(&virtio_rng_driver);
 }
 
 static void __exit fini(void)
 {
-	unregister_virtio_driver(&virtio_rng);
+	unregister_virtio_driver(&virtio_rng_driver);
 }
 module_init(init);
 module_exit(fini);
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 679cd08b80b..176f1751237 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -3204,7 +3204,7 @@ static __devinit int init_ipmi_si(void)
 #ifdef CONFIG_ACPI
 	spmi_find_bmc();
 #endif
-#ifdef CONFIG_PNP
+#ifdef CONFIG_ACPI
 	pnp_register_driver(&ipmi_pnp_driver);
 #endif
 
@@ -3330,7 +3330,7 @@ static __exit void cleanup_ipmi_si(void)
 #ifdef CONFIG_PCI
 	pci_unregister_driver(&ipmi_pci_driver);
 #endif
-#ifdef CONFIG_PNP
+#ifdef CONFIG_ACPI
 	pnp_unregister_driver(&ipmi_pnp_driver);
 #endif
 
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index be832b6f827..48788db4e28 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -395,6 +395,7 @@ static ssize_t read_kmem(struct file *file, char __user *buf,
 	unsigned long p = *ppos;
 	ssize_t low_count, read, sz;
 	char * kbuf; /* k-addr because vread() takes vmlist_lock rwlock */
+	int err = 0;
 
 	read = 0;
 	if (p < (unsigned long) high_memory) {
@@ -441,12 +442,16 @@ static ssize_t read_kmem(struct file *file, char __user *buf,
 			return -ENOMEM;
 		while (count > 0) {
 			sz = size_inside_page(p, count);
+			if (!is_vmalloc_or_module_addr((void *)p)) {
+				err = -ENXIO;
+				break;
+			}
 			sz = vread(kbuf, (char *)p, sz);
 			if (!sz)
 				break;
 			if (copy_to_user(buf, kbuf, sz)) {
-				free_page((unsigned long)kbuf);
-				return -EFAULT;
+				err = -EFAULT;
+				break;
 			}
 			count -= sz;
 			buf += sz;
@@ -455,8 +460,8 @@ static ssize_t read_kmem(struct file *file, char __user *buf,
 		}
 		free_page((unsigned long)kbuf);
 	}
- 	*ppos = p;
- 	return read;
+	*ppos = p;
+	return read ? read : err;
 }
 
 
@@ -520,6 +525,7 @@ static ssize_t write_kmem(struct file * file, const char __user * buf,
 	ssize_t wrote = 0;
 	ssize_t virtr = 0;
 	char * kbuf; /* k-addr because vwrite() takes vmlist_lock rwlock */
+	int err = 0;
 
 	if (p < (unsigned long) high_memory) {
 		unsigned long to_write = min_t(unsigned long, count,
@@ -540,14 +546,16 @@ static ssize_t write_kmem(struct file * file, const char __user * buf,
 			unsigned long sz = size_inside_page(p, count);
 			unsigned long n;
 
+			if (!is_vmalloc_or_module_addr((void *)p)) {
+				err = -ENXIO;
+				break;
+			}
 			n = copy_from_user(kbuf, buf, sz);
 			if (n) {
-				if (wrote + virtr)
-					break;
-				free_page((unsigned long)kbuf);
-				return -EFAULT;
+				err = -EFAULT;
+				break;
 			}
-			sz = vwrite(kbuf, (char *)p, sz);
+			vwrite(kbuf, (char *)p, sz);
 			count -= sz;
 			buf += sz;
 			virtr += sz;
@@ -556,8 +564,8 @@ static ssize_t write_kmem(struct file * file, const char __user * buf,
 		free_page((unsigned long)kbuf);
 	}
 
- 	*ppos = p;
- 	return virtr + wrote;
+	*ppos = p;
+	return virtr + wrote ? : err;
 }
 #endif
 
diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c
index 7d73cd43034..2ad7d37afbd 100644
--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -1651,10 +1651,10 @@ static void ntty_close(struct tty_struct *tty, struct file *file)
 
 	dc->open_ttys--;
 	port->count--;
-	tty_port_tty_set(port, NULL);
 
 	if (port->count == 0) {
 		DBG1("close: %d", nport->token_dl);
+		tty_port_tty_set(port, NULL);
 		spin_lock_irqsave(&dc->spin_mutex, flags);
 		dc->last_ier &= ~(nport->token_dl);
 		writew(dc->last_ier, dc->reg_ier);
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 8258982b49e..2849713d223 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1051,12 +1051,6 @@ random_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
 				/* like a named pipe */
 	}
 
-	/*
-	 * If we gave the user some bytes, update the access time.
-	 */
-	if (count)
-		file_accessed(file);
-
 	return (count ? count : retval);
 }
 
@@ -1107,7 +1101,6 @@ static ssize_t random_write(struct file *file, const char __user *buffer,
 			    size_t count, loff_t *ppos)
 {
 	size_t ret;
-	struct inode *inode = file->f_path.dentry->d_inode;
 
 	ret = write_pool(&blocking_pool, buffer, count);
 	if (ret)
@@ -1116,8 +1109,6 @@ static ssize_t random_write(struct file *file, const char __user *buffer,
 	if (ret)
 		return ret;
 
-	inode->i_mtime = current_fs_time(inode->i_sb);
-	mark_inode_dirty(inode);
 	return (ssize_t)count;
 }
 
diff --git a/drivers/char/sonypi.c b/drivers/char/sonypi.c
index 0798754a607..bba727c3807 100644
--- a/drivers/char/sonypi.c
+++ b/drivers/char/sonypi.c
@@ -50,7 +50,6 @@
 #include <linux/err.h>
 #include <linux/kfifo.h>
 #include <linux/platform_device.h>
-#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
@@ -905,14 +904,13 @@ static int sonypi_misc_release(struct inode *inode, struct file *file)
 
 static int sonypi_misc_open(struct inode *inode, struct file *file)
 {
-	lock_kernel();
 	mutex_lock(&sonypi_device.lock);
 	/* Flush input queue on first open */
 	if (!sonypi_device.open_count)
 		kfifo_reset(&sonypi_device.fifo);
 	sonypi_device.open_count++;
 	mutex_unlock(&sonypi_device.lock);
-	unlock_kernel();
+
 	return 0;
 }
 
@@ -955,10 +953,10 @@ static unsigned int sonypi_misc_poll(struct file *file, poll_table *wait)
 	return 0;
 }
 
-static int sonypi_misc_ioctl(struct inode *ip, struct file *fp,
+static long sonypi_misc_ioctl(struct file *fp,
 			     unsigned int cmd, unsigned long arg)
 {
-	int ret = 0;
+	long ret = 0;
 	void __user *argp = (void __user *)arg;
 	u8 val8;
 	u16 val16;
@@ -1074,7 +1072,8 @@ static const struct file_operations sonypi_misc_fops = {
 	.open		= sonypi_misc_open,
 	.release	= sonypi_misc_release,
 	.fasync		= sonypi_misc_fasync,
-	.ioctl		= sonypi_misc_ioctl,
+	.unlocked_ioctl	= sonypi_misc_ioctl,
+	.llseek		= no_llseek,
 };
 
 static struct miscdevice sonypi_misc_device = {
diff --git a/drivers/char/toshiba.c b/drivers/char/toshiba.c
index 663cd15d7c7..f8bc79f6de3 100644
--- a/drivers/char/toshiba.c
+++ b/drivers/char/toshiba.c
@@ -68,7 +68,7 @@
 #include <linux/stat.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
-
+#include <linux/smp_lock.h>
 #include <linux/toshiba.h>
 
 #define TOSH_MINOR_DEV 181
@@ -88,13 +88,13 @@ static int tosh_date;
 static int tosh_sci;
 static int tosh_fan;
 
-static int tosh_ioctl(struct inode *, struct file *, unsigned int,
+static long tosh_ioctl(struct file *, unsigned int,
 	unsigned long);
 
 
 static const struct file_operations tosh_fops = {
 	.owner		= THIS_MODULE,
-	.ioctl		= tosh_ioctl,
+	.unlocked_ioctl	= tosh_ioctl,
 };
 
 static struct miscdevice tosh_device = {
@@ -252,8 +252,7 @@ int tosh_smm(SMMRegisters *regs)
 EXPORT_SYMBOL(tosh_smm);
 
 
-static int tosh_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
-	unsigned long arg)
+static long tosh_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
 {
 	SMMRegisters regs;
 	SMMRegisters __user *argp = (SMMRegisters __user *)arg;
@@ -275,13 +274,16 @@ static int tosh_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
 				return -EINVAL;
 
 			/* do we need to emulate the fan ? */
+			lock_kernel();
 			if (tosh_fan==1) {
 				if (((ax==0xf300) || (ax==0xf400)) && (bx==0x0004)) {
 					err = tosh_emulate_fan(&regs);
+					unlock_kernel();
 					break;
 				}
 			}
 			err = tosh_smm(&regs);
+			unlock_kernel();
 			break;
 		default:
 			return -EINVAL;
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index f15df40bc31..c6f3b48be9d 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -1951,8 +1951,8 @@ static int tty_fasync(int fd, struct file *filp, int on)
 			pid = task_pid(current);
 			type = PIDTYPE_PID;
 		}
-		spin_unlock_irqrestore(&tty->ctrl_lock, flags);
 		retval = __f_setown(filp, pid, type, 0);
+		spin_unlock_irqrestore(&tty->ctrl_lock, flags);
 		if (retval)
 			goto out;
 	} else {
diff --git a/drivers/char/uv_mmtimer.c b/drivers/char/uv_mmtimer.c
index 867b67be9f0..c7072ba14f4 100644
--- a/drivers/char/uv_mmtimer.c
+++ b/drivers/char/uv_mmtimer.c
@@ -89,13 +89,17 @@ static long uv_mmtimer_ioctl(struct file *file, unsigned int cmd,
 	switch (cmd) {
 	case MMTIMER_GETOFFSET:	/* offset of the counter */
 		/*
-		 * UV RTC register is on its own page
+		 * Starting with HUB rev 2.0, the UV RTC register is
+		 * replicated across all cachelines of it's own page.
+		 * This allows faster simultaneous reads from a given socket.
+		 *
+		 * The offset returned is in 64 bit units.
 		 */
-		if (PAGE_SIZE <= (1 << 16))
-			ret = ((UV_LOCAL_MMR_BASE | UVH_RTC) & (PAGE_SIZE-1))
-				/ 8;
+		if (uv_get_min_hub_revision_id() == 1)
+			ret = 0;
 		else
-			ret = -ENOSYS;
+			ret = ((uv_blade_processor_id() * L1_CACHE_BYTES) %
+					PAGE_SIZE) / 8;
 		break;
 
 	case MMTIMER_GETRES: /* resolution of the clock in 10^-15 s */
@@ -115,8 +119,8 @@ static long uv_mmtimer_ioctl(struct file *file, unsigned int cmd,
 		ret = hweight64(UVH_RTC_REAL_TIME_CLOCK_MASK);
 		break;
 
-	case MMTIMER_MMAPAVAIL: /* can we mmap the clock into userspace? */
-		ret = (PAGE_SIZE <= (1 << 16)) ? 1 : 0;
+	case MMTIMER_MMAPAVAIL:
+		ret = 1;
 		break;
 
 	case MMTIMER_GETCOUNTER: