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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-05-20 15:36:52 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-05-20 15:36:52 +1000
commit880102e78547c1db158a17e36cf0cdd98e7ad710 (patch)
tree3fff9cc54c44dafe275cfabefb96c589e08d971d /drivers/char
parent3d07f0e83d4323d2cd45cc583f7cf1957aca3cac (diff)
parent39ab05c8e0b519ff0a04a869f065746e6e8c3d95 (diff)
downloadop-kernel-dev-880102e78547c1db158a17e36cf0cdd98e7ad710.zip
op-kernel-dev-880102e78547c1db158a17e36cf0cdd98e7ad710.tar.gz
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>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/Kconfig2
-rw-r--r--drivers/char/hpet.c6
-rw-r--r--drivers/char/mem.c42
-rw-r--r--drivers/char/raw.c34
4 files changed, 56 insertions, 28 deletions
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index ad59b4e..49502bc 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 7066e80..051474c 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 436a990..8fc04b4 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 b4b9d5a..b33e8ea 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);
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