Merge branch 'linus' into x86/irqtip-x86-irq-2008-06-16_09.27_Mon

15 files changed, 96 insertions, 59 deletions

diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c
index 025764089ac8..cfeb3f4a44af 100644
--- a/arch/um/drivers/chan_user.c
+++ b/arch/um/drivers/chan_user.c
@@ -11,6 +11,7 @@
 #include <termios.h>
 #include <sys/ioctl.h>
 #include "chan_user.h"
+#include "kern_constants.h"
 #include "os.h"
 #include "um_malloc.h"
 #include "user.h"
diff --git a/arch/um/drivers/cow_sys.h b/arch/um/drivers/cow_sys.h
index ca8c9e11a39b..f5701fd2ef90 100644
--- a/arch/um/drivers/cow_sys.h
+++ b/arch/um/drivers/cow_sys.h
@@ -8,7 +8,7 @@
 
 static inline void *cow_malloc(int size)
 {
-	return kmalloc(size, UM_GFP_KERNEL);
+	return uml_kmalloc(size, UM_GFP_KERNEL);
 }
 
 static inline void cow_free(void *ptr)
diff --git a/arch/um/drivers/daemon_user.c b/arch/um/drivers/daemon_user.c
index f23c109a055c..f8e85e0bdace 100644
--- a/arch/um/drivers/daemon_user.c
+++ b/arch/um/drivers/daemon_user.c
@@ -34,7 +34,7 @@ static struct sockaddr_un *new_addr(void *name, int len)
 {
 	struct sockaddr_un *sun;
 
-	sun = kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
+	sun = uml_kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
 	if (sun == NULL) {
 		printk(UM_KERN_ERR "new_addr: allocation of sockaddr_un "
 		       "failed\n");
@@ -83,7 +83,7 @@ static int connect_to_switch(struct daemon_data *pri)
 		goto out_close;
 	}
 
-	sun = kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
+	sun = uml_kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
 	if (sun == NULL) {
 		printk(UM_KERN_ERR "new_addr: allocation of sockaddr_un "
 		       "failed\n");
diff --git a/arch/um/drivers/fd.c b/arch/um/drivers/fd.c
index 0a2bb5b64b82..f5a981a16240 100644
--- a/arch/um/drivers/fd.c
+++ b/arch/um/drivers/fd.c
@@ -40,7 +40,7 @@ static void *fd_init(char *str, int device, const struct chan_opts *opts)
 		return NULL;
 	}
 
-	data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
+	data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
 	if (data == NULL)
 		return NULL;
 
diff --git a/arch/um/drivers/hostaudio_kern.c b/arch/um/drivers/hostaudio_kern.c
index ff1b22b69e9c..368219cc2366 100644
--- a/arch/um/drivers/hostaudio_kern.c
+++ b/arch/um/drivers/hostaudio_kern.c
@@ -154,7 +154,7 @@ static int hostaudio_ioctl(struct inode *inode, struct file *file,
 	case SNDCTL_DSP_SUBDIVIDE:
 	case SNDCTL_DSP_SETFRAGMENT:
 		if (get_user(data, (int __user *) arg))
-			return EFAULT;
+			return -EFAULT;
 		break;
 	default:
 		break;
diff --git a/arch/um/drivers/mcast_user.c b/arch/um/drivers/mcast_user.c
index 5f647d7a7292..ee19e91568a2 100644
--- a/arch/um/drivers/mcast_user.c
+++ b/arch/um/drivers/mcast_user.c
@@ -15,6 +15,7 @@
 #include <unistd.h>
 #include <errno.h>
 #include <netinet/in.h>
+#include "kern_constants.h"
 #include "mcast.h"
 #include "net_user.h"
 #include "um_malloc.h"
@@ -24,7 +25,7 @@ static struct sockaddr_in *new_addr(char *addr, unsigned short port)
 {
 	struct sockaddr_in *sin;
 
-	sin = kmalloc(sizeof(struct sockaddr_in), UM_GFP_KERNEL);
+	sin = uml_kmalloc(sizeof(struct sockaddr_in), UM_GFP_KERNEL);
 	if (sin == NULL) {
 		printk(UM_KERN_ERR "new_addr: allocation of sockaddr_in "
 		       "failed\n");
diff --git a/arch/um/drivers/net_user.c b/arch/um/drivers/net_user.c
index abf2653f5517..9415dd9e63ef 100644
--- a/arch/um/drivers/net_user.c
+++ b/arch/um/drivers/net_user.c
@@ -222,7 +222,7 @@ static void change(char *dev, char *what, unsigned char *addr,
 		netmask[2], netmask[3]);
 
 	output_len = UM_KERN_PAGE_SIZE;
-	output = kmalloc(output_len, UM_GFP_KERNEL);
+	output = uml_kmalloc(output_len, UM_GFP_KERNEL);
 	if (output == NULL)
 		printk(UM_KERN_ERR "change : failed to allocate output "
 		       "buffer\n");
diff --git a/arch/um/drivers/pcap_user.c b/arch/um/drivers/pcap_user.c
index e9809356c530..5f903587d69e 100644
--- a/arch/um/drivers/pcap_user.c
+++ b/arch/um/drivers/pcap_user.c
@@ -50,7 +50,7 @@ static int pcap_open(void *data)
 			return -EIO;
 		}
 
-		pri->compiled = kmalloc(sizeof(struct bpf_program),
+		pri->compiled = uml_kmalloc(sizeof(struct bpf_program),
 					UM_GFP_KERNEL);
 		if (pri->compiled == NULL) {
 			printk(UM_KERN_ERR "pcap_open : kmalloc failed\n");
diff --git a/arch/um/drivers/port_user.c b/arch/um/drivers/port_user.c
index d269ca387f10..b49bf56a56aa 100644
--- a/arch/um/drivers/port_user.c
+++ b/arch/um/drivers/port_user.c
@@ -47,7 +47,7 @@ static void *port_init(char *str, int device, const struct chan_opts *opts)
 	if (kern_data == NULL)
 		return NULL;
 
-	data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
+	data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
 	if (data == NULL)
 		goto err;
 
diff --git a/arch/um/drivers/pty.c b/arch/um/drivers/pty.c
index 49c79dda6046..1113911dcb2b 100644
--- a/arch/um/drivers/pty.c
+++ b/arch/um/drivers/pty.c
@@ -29,7 +29,7 @@ static void *pty_chan_init(char *str, int device, const struct chan_opts *opts)
 {
 	struct pty_chan *data;
 
-	data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
+	data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
 	if (data == NULL)
 		return NULL;
 
diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c
index 71f0959c1535..4949044773ba 100644
--- a/arch/um/drivers/random.c
+++ b/arch/um/drivers/random.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 2005 Jeff Dike <jdike@addtoit.com> */
+/* Copyright (C) 2005 - 2008 Jeff Dike <jdike@{linux.intel,addtoit}.com> */
+
 /* Much of this ripped from drivers/char/hw_random.c, see there for other
  * copyright.
  *
@@ -8,16 +9,18 @@
 #include <linux/sched.h>
 #include <linux/module.h>
 #include <linux/fs.h>
+#include <linux/interrupt.h>
 #include <linux/miscdevice.h>
 #include <linux/delay.h>
 #include <asm/uaccess.h>
+#include "irq_kern.h"
 #include "os.h"
 
 /*
  * core module and version information
  */
 #define RNG_VERSION "1.0.0"
-#define RNG_MODULE_NAME "random"
+#define RNG_MODULE_NAME "hw_random"
 
 #define RNG_MISCDEV_MINOR		183 /* official */
 
@@ -26,47 +29,67 @@
  * protects against a module being loaded twice at the same time.
  */
 static int random_fd = -1;
+static DECLARE_WAIT_QUEUE_HEAD(host_read_wait);
 
 static int rng_dev_open (struct inode *inode, struct file *filp)
 {
 	/* enforce read-only access to this chrdev */
 	if ((filp->f_mode & FMODE_READ) == 0)
 		return -EINVAL;
-	if (filp->f_mode & FMODE_WRITE)
+	if ((filp->f_mode & FMODE_WRITE) != 0)
 		return -EINVAL;
 
 	return 0;
 }
 
+static atomic_t host_sleep_count = ATOMIC_INIT(0);
+
 static ssize_t rng_dev_read (struct file *filp, char __user *buf, size_t size,
-                             loff_t * offp)
+			     loff_t *offp)
 {
-        u32 data;
-        int n, ret = 0, have_data;
-
-        while(size){
-                n = os_read_file(random_fd, &data, sizeof(data));
-                if(n > 0){
-                        have_data = n;
-                        while (have_data && size) {
-                                if (put_user((u8)data, buf++)) {
-                                        ret = ret ? : -EFAULT;
-                                        break;
-                                }
-                                size--;
-                                ret++;
-                                have_data--;
-                                data>>=8;
-                        }
-                }
-                else if(n == -EAGAIN){
-                        if (filp->f_flags & O_NONBLOCK)
-                                return ret ? : -EAGAIN;
-
-                        if(need_resched())
-                                schedule_timeout_interruptible(1);
-                }
-                else return n;
+	u32 data;
+	int n, ret = 0, have_data;
+
+	while (size) {
+		n = os_read_file(random_fd, &data, sizeof(data));
+		if (n > 0) {
+			have_data = n;
+			while (have_data && size) {
+				if (put_user((u8) data, buf++)) {
+					ret = ret ? : -EFAULT;
+					break;
+				}
+				size--;
+				ret++;
+				have_data--;
+				data >>= 8;
+			}
+		}
+		else if (n == -EAGAIN) {
+			DECLARE_WAITQUEUE(wait, current);
+
+			if (filp->f_flags & O_NONBLOCK)
+				return ret ? : -EAGAIN;
+
+			atomic_inc(&host_sleep_count);
+			reactivate_fd(random_fd, RANDOM_IRQ);
+			add_sigio_fd(random_fd);
+
+			add_wait_queue(&host_read_wait, &wait);
+			set_task_state(current, TASK_INTERRUPTIBLE);
+
+			schedule();
+			set_task_state(current, TASK_RUNNING);
+			remove_wait_queue(&host_read_wait, &wait);
+
+			if (atomic_dec_and_test(&host_sleep_count)) {
+				ignore_sigio_fd(random_fd);
+				deactivate_fd(random_fd, RANDOM_IRQ);
+			}
+		}
+		else
+			return n;
+
 		if (signal_pending (current))
 			return ret ? : -ERESTARTSYS;
 	}
@@ -86,6 +109,13 @@ static struct miscdevice rng_miscdev = {
 	&rng_chrdev_ops,
 };
 
+static irqreturn_t random_interrupt(int irq, void *data)
+{
+	wake_up(&host_read_wait);
+
+	return IRQ_HANDLED;
+}
+
 /*
  * rng_init - initialize RNG module
  */
@@ -93,28 +123,33 @@ static int __init rng_init (void)
 {
 	int err;
 
-        err = os_open_file("/dev/random", of_read(OPENFLAGS()), 0);
-        if(err < 0)
-                goto out;
+	err = os_open_file("/dev/random", of_read(OPENFLAGS()), 0);
+	if (err < 0)
+		goto out;
 
-        random_fd = err;
+	random_fd = err;
 
-        err = os_set_fd_block(random_fd, 0);
-        if(err)
+	err = um_request_irq(RANDOM_IRQ, random_fd, IRQ_READ, random_interrupt,
+			     IRQF_DISABLED | IRQF_SAMPLE_RANDOM, "random",
+			     NULL);
+	if (err)
 		goto err_out_cleanup_hw;
 
+	sigio_broken(random_fd, 1);
+
 	err = misc_register (&rng_miscdev);
 	if (err) {
-		printk (KERN_ERR RNG_MODULE_NAME ": misc device register failed\n");
+		printk (KERN_ERR RNG_MODULE_NAME ": misc device register "
+			"failed\n");
 		goto err_out_cleanup_hw;
 	}
+out:
+	return err;
 
- out:
-        return err;
-
- err_out_cleanup_hw:
-        random_fd = -1;
-        goto out;
+err_out_cleanup_hw:
+	os_close_file(random_fd);
+	random_fd = -1;
+	goto out;
 }
 
 /*
@@ -122,6 +157,7 @@ static int __init rng_init (void)
  */
 static void __exit rng_cleanup (void)
 {
+	os_close_file(random_fd);
 	misc_deregister (&rng_miscdev);
 }
 
diff --git a/arch/um/drivers/slip_user.c b/arch/um/drivers/slip_user.c
index 8b80505a3fb0..a1c2d2c98a94 100644
--- a/arch/um/drivers/slip_user.c
+++ b/arch/um/drivers/slip_user.c
@@ -96,7 +96,7 @@ static int slip_tramp(char **argv, int fd)
 	pid = err;
 
 	output_len = UM_KERN_PAGE_SIZE;
-	output = kmalloc(output_len, UM_GFP_KERNEL);
+	output = uml_kmalloc(output_len, UM_GFP_KERNEL);
 	if (output == NULL) {
 		printk(UM_KERN_ERR "slip_tramp : failed to allocate output "
 		       "buffer\n");
diff --git a/arch/um/drivers/tty.c b/arch/um/drivers/tty.c
index c930fedc5172..495858a090e4 100644
--- a/arch/um/drivers/tty.c
+++ b/arch/um/drivers/tty.c
@@ -29,7 +29,7 @@ static void *tty_chan_init(char *str, int device, const struct chan_opts *opts)
 	}
 	str++;
 
-	data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
+	data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
 	if (data == NULL)
 		return NULL;
 	*data = ((struct tty_chan) { .dev 	= str,
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 5e45e39a8a8d..b58fb8941d8d 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -49,7 +49,6 @@
 #include "irq_user.h"
 #include "irq_kern.h"
 #include "ubd_user.h"
-#include "kern_util.h"
 #include "os.h"
 #include "mem.h"
 #include "mem_kern.h"
@@ -1178,8 +1177,8 @@ static void cowify_bitmap(__u64 io_offset, int length, unsigned long *cow_mask,
 	 * by one word.  Thanks to Lynn Kerby for the fix and James McMechan
 	 * for the original diagnosis.
 	 */
-	if(*cow_offset == ((bitmap_len + sizeof(unsigned long) - 1) /
-			   sizeof(unsigned long) - 1))
+	if (*cow_offset == (DIV_ROUND_UP(bitmap_len,
+					 sizeof(unsigned long)) - 1))
 		(*cow_offset)--;
 
 	bitmap_words[0] = bitmap[*cow_offset];
diff --git a/arch/um/drivers/xterm.c b/arch/um/drivers/xterm.c
index 8a1c18a9b240..da2caa5a21ef 100644
--- a/arch/um/drivers/xterm.c
+++ b/arch/um/drivers/xterm.c
@@ -30,7 +30,7 @@ static void *xterm_init(char *str, int device, const struct chan_opts *opts)
 {
 	struct xterm_chan *data;
 
-	data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
+	data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
 	if (data == NULL)
 		return NULL;
 	*data = ((struct xterm_chan) { .pid 		= -1,