Merge remote branch 'origin/master' into merge

Manual merge of arch/powerpc/kernel/smp.c and add missing scheduler_ipi()
call to arch/powerpc/platforms/cell/interrupt.c

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

4 files changed, 56 insertions, 28 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/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/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);