Merge with temp tree to get David's gdb inferior calls patch

26 files changed, 366 insertions, 641 deletions

diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 9a23df1..c529218 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -244,6 +244,7 @@ config KERNEL_HALF_GIGS
 
 config HIGHMEM
 	bool "Highmem support"
+	depends on !64BIT
 
 config KERNEL_STACK_ORDER
 	int "Kernel stack size order"
diff --git a/arch/um/Kconfig_i386 b/arch/um/Kconfig_i386
index 203c242..e41f374 100644
--- a/arch/um/Kconfig_i386
+++ b/arch/um/Kconfig_i386
@@ -1,4 +1,8 @@
-config 64_BIT
+config UML_X86
+	bool
+	default y
+
+config 64BIT
 	bool
 	default n
 
diff --git a/arch/um/Kconfig_x86_64 b/arch/um/Kconfig_x86_64
index 768dc66..fd8d7e8 100644
--- a/arch/um/Kconfig_x86_64
+++ b/arch/um/Kconfig_x86_64
@@ -1,4 +1,8 @@
-config 64_BIT
+config UML_X86
+	bool
+	default y
+
+config 64BIT
 	bool
 	default y
 
diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386
index 97b223b..f9e3c0f 100644
--- a/arch/um/Makefile-i386
+++ b/arch/um/Makefile-i386
@@ -1,4 +1,4 @@
-SUBARCH_CORE := arch/um/sys-i386/
+SUBARCH_CORE := arch/um/sys-i386/ arch/i386/crypto/
 
 TOP_ADDR := $(CONFIG_TOP_ADDR)
 
diff --git a/arch/um/defconfig b/arch/um/defconfig
index fc3075c..4067c3a 100644
--- a/arch/um/defconfig
+++ b/arch/um/defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.12-rc1-bk1
-# Sun Mar 20 16:53:00 2005
+# Linux kernel version: 2.6.12-rc3-skas3-v9-pre2
+# Sun Apr 24 19:46:10 2005
 #
 CONFIG_GENERIC_HARDIRQS=y
 CONFIG_UML=y
@@ -15,7 +15,8 @@ CONFIG_GENERIC_CALIBRATE_DELAY=y
 #
 CONFIG_MODE_TT=y
 CONFIG_MODE_SKAS=y
-# CONFIG_64_BIT is not set
+CONFIG_UML_X86=y
+# CONFIG_64BIT is not set
 CONFIG_TOP_ADDR=0xc0000000
 # CONFIG_3_LEVEL_PGTABLES is not set
 CONFIG_ARCH_HAS_SC_SIGNALS=y
@@ -41,6 +42,7 @@ CONFIG_UML_REAL_TIME_CLOCK=y
 CONFIG_EXPERIMENTAL=y
 CONFIG_CLEAN_COMPILE=y
 CONFIG_BROKEN_ON_SMP=y
+CONFIG_INIT_ENV_ARG_LIMIT=32
 
 #
 # General setup
@@ -158,7 +160,6 @@ CONFIG_UML_NET_SLIRP=y
 #
 CONFIG_PACKET=y
 CONFIG_PACKET_MMAP=y
-# CONFIG_NETLINK_DEV is not set
 CONFIG_UNIX=y
 # CONFIG_NET_KEY is not set
 CONFIG_INET=y
@@ -412,6 +413,5 @@ CONFIG_DEBUG_INFO=y
 # CONFIG_DEBUG_FS is not set
 CONFIG_FRAME_POINTER=y
 CONFIG_PT_PROXY=y
-# CONFIG_GPROF is not set
 # CONFIG_GCOV is not set
 # CONFIG_SYSCALL_DEBUG is not set
diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c
index 1f77deb..0150038 100644
--- a/arch/um/drivers/chan_kern.c
+++ b/arch/um/drivers/chan_kern.c
@@ -22,7 +22,7 @@
 #ifdef CONFIG_NOCONFIG_CHAN
 static void *not_configged_init(char *str, int device, struct chan_opts *opts)
 {
-	printk(KERN_ERR "Using a channel type which is configured out of "
+	printf(KERN_ERR "Using a channel type which is configured out of "
 	       "UML\n");
 	return(NULL);
 }
@@ -30,27 +30,27 @@ static void *not_configged_init(char *str, int device, struct chan_opts *opts)
 static int not_configged_open(int input, int output, int primary, void *data,
 			      char **dev_out)
 {
-	printk(KERN_ERR "Using a channel type which is configured out of "
+	printf(KERN_ERR "Using a channel type which is configured out of "
 	       "UML\n");
 	return(-ENODEV);
 }
 
 static void not_configged_close(int fd, void *data)
 {
-	printk(KERN_ERR "Using a channel type which is configured out of "
+	printf(KERN_ERR "Using a channel type which is configured out of "
 	       "UML\n");
 }
 
 static int not_configged_read(int fd, char *c_out, void *data)
 {
-	printk(KERN_ERR "Using a channel type which is configured out of "
+	printf(KERN_ERR "Using a channel type which is configured out of "
 	       "UML\n");
 	return(-EIO);
 }
 
 static int not_configged_write(int fd, const char *buf, int len, void *data)
 {
-	printk(KERN_ERR "Using a channel type which is configured out of "
+	printf(KERN_ERR "Using a channel type which is configured out of "
 	       "UML\n");
 	return(-EIO);
 }
@@ -58,7 +58,7 @@ static int not_configged_write(int fd, const char *buf, int len, void *data)
 static int not_configged_console_write(int fd, const char *buf, int len,
 				       void *data)
 {
-	printk(KERN_ERR "Using a channel type which is configured out of "
+	printf(KERN_ERR "Using a channel type which is configured out of "
 	       "UML\n");
 	return(-EIO);
 }
@@ -66,14 +66,14 @@ static int not_configged_console_write(int fd, const char *buf, int len,
 static int not_configged_window_size(int fd, void *data, unsigned short *rows,
 				     unsigned short *cols)
 {
-	printk(KERN_ERR "Using a channel type which is configured out of "
+	printf(KERN_ERR "Using a channel type which is configured out of "
 	       "UML\n");
 	return(-ENODEV);
 }
 
 static void not_configged_free(void *data)
 {
-	printk(KERN_ERR "Using a channel type which is configured out of "
+	printf(KERN_ERR "Using a channel type which is configured out of "
 	       "UML\n");
 }
 
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 6924f27..d0f9712 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -39,19 +39,69 @@ static void line_timer_cb(void *arg)
 	line_interrupt(line->driver->read_irq, arg, NULL);
 }
 
-static int write_room(struct line *dev)
+/* Returns the free space inside the ring buffer of this line.
+ *
+ * Should be called while holding line->lock (this does not modify datas).
+ */
+static int write_room(struct line *line)
 {
 	int n;
 
-	if (dev->buffer == NULL)
-		return (LINE_BUFSIZE - 1);
+	if (line->buffer == NULL)
+		return LINE_BUFSIZE - 1;
+
+	/* This is for the case where the buffer is wrapped! */
+	n = line->head - line->tail;
 
-	n = dev->head - dev->tail;
 	if (n <= 0)
-		n = LINE_BUFSIZE + n;
-	return (n - 1);
+		n = LINE_BUFSIZE + n; /* The other case */
+	return n - 1;
+}
+
+int line_write_room(struct tty_struct *tty)
+{
+	struct line *line = tty->driver_data;
+	unsigned long flags;
+	int room;
+
+	if (tty->stopped)
+		return 0;
+
+	spin_lock_irqsave(&line->lock, flags);
+	room = write_room(line);
+	spin_unlock_irqrestore(&line->lock, flags);
+
+	/*XXX: Warning to remove */
+	if (0 == room)
+		printk(KERN_DEBUG "%s: %s: no room left in buffer\n",
+		       __FUNCTION__,tty->name);
+	return room;
 }
 
+int line_chars_in_buffer(struct tty_struct *tty)
+{
+	struct line *line = tty->driver_data;
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&line->lock, flags);
+
+	/*write_room subtracts 1 for the needed NULL, so we readd it.*/
+	ret = LINE_BUFSIZE - (write_room(line) + 1);
+	spin_unlock_irqrestore(&line->lock, flags);
+
+	return ret;
+}
+
+/*
+ * This copies the content of buf into the circular buffer associated with
+ * this line.
+ * The return value is the number of characters actually copied, i.e. the ones
+ * for which there was space: this function is not supposed to ever flush out
+ * the circular buffer.
+ *
+ * Must be called while holding line->lock!
+ */
 static int buffer_data(struct line *line, const char *buf, int len)
 {
 	int end, room;
@@ -70,48 +120,95 @@ static int buffer_data(struct line *line, const char *buf, int len)
 	len = (len > room) ? room : len;
 
 	end = line->buffer + LINE_BUFSIZE - line->tail;
-	if(len < end){
+
+	if (len < end){
 		memcpy(line->tail, buf, len);
 		line->tail += len;
-	}
-	else {
+	} else {
+		/* The circular buffer is wrapping */
 		memcpy(line->tail, buf, end);
 		buf += end;
 		memcpy(line->buffer, buf, len - end);
 		line->tail = line->buffer + len - end;
 	}
 
-	return(len);
+	return len;
 }
 
+/*
+ * Flushes the ring buffer to the output channels. That is, write_chan is
+ * called, passing it line->head as buffer, and an appropriate count.
+ *
+ * On exit, returns 1 when the buffer is empty,
+ * 0 when the buffer is not empty on exit,
+ * and -errno when an error occurred.
+ *
+ * Must be called while holding line->lock!*/
 static int flush_buffer(struct line *line)
 {
 	int n, count;
 
 	if ((line->buffer == NULL) || (line->head == line->tail))
-		return(1);
+		return 1;
 
 	if (line->tail < line->head) {
+		/* line->buffer + LINE_BUFSIZE is the end of the buffer! */
 		count = line->buffer + LINE_BUFSIZE - line->head;
+
 		n = write_chan(&line->chan_list, line->head, count,
 			       line->driver->write_irq);
 		if (n < 0)
-			return(n);
-		if (n == count)
+			return n;
+		if (n == count) {
+			/* We have flushed from ->head to buffer end, now we
+			 * must flush only from the beginning to ->tail.*/
 			line->head = line->buffer;
-		else {
+		} else {
 			line->head += n;
-			return(0);
+			return 0;
 		}
 	}
 
 	count = line->tail - line->head;
 	n = write_chan(&line->chan_list, line->head, count, 
 		       line->driver->write_irq);
-	if(n < 0) return(n);
+
+	if(n < 0)
+		return n;
 
 	line->head += n;
-	return(line->head == line->tail);
+	return line->head == line->tail;
+}
+
+void line_flush_buffer(struct tty_struct *tty)
+{
+	struct line *line = tty->driver_data;
+	unsigned long flags;
+	int err;
+
+	/*XXX: copied from line_write, verify if it is correct!*/
+	if(tty->stopped)
+		return;
+		//return 0;
+
+	spin_lock_irqsave(&line->lock, flags);
+	err = flush_buffer(line);
+	/*if (err == 1)
+		err = 0;*/
+	spin_unlock_irqrestore(&line->lock, flags);
+	//return err;
+}
+
+/* We map both ->flush_chars and ->put_char (which go in pair) onto ->flush_buffer
+ * and ->write. Hope it's not that bad.*/
+void line_flush_chars(struct tty_struct *tty)
+{
+	line_flush_buffer(tty);
+}
+
+void line_put_char(struct tty_struct *tty, unsigned char ch)
+{
+	line_write(tty, &ch, sizeof(ch));
 }
 
 int line_write(struct tty_struct *tty, const unsigned char *buf, int len)
@@ -120,38 +217,31 @@ int line_write(struct tty_struct *tty, const unsigned char *buf, int len)
 	unsigned long flags;
 	int n, err, ret = 0;
 
-	if(tty->stopped) return 0;
+	if(tty->stopped)
+		return 0;
 
-	down(&line->sem);
-	if(line->head != line->tail){
-		local_irq_save(flags);
+	spin_lock_irqsave(&line->lock, flags);
+	if (line->head != line->tail) {
 		ret = buffer_data(line, buf, len);
 		err = flush_buffer(line);
-		local_irq_restore(flags);
-		if(err <= 0 && (err != -EAGAIN || !ret))
+		if (err <= 0 && (err != -EAGAIN || !ret))
 			ret = err;
-	}
-	else {
+	} else {
 		n = write_chan(&line->chan_list, buf, len, 
 			       line->driver->write_irq);
-		if(n < 0){
+		if (n < 0) {
 			ret = n;
 			goto out_up;
 		}
 
 		len -= n;
 		ret += n;
-		if(len > 0)
+		if (len > 0)
 			ret += buffer_data(line, buf + n, len);
 	}
- out_up:
-	up(&line->sem);
-	return(ret);
-}
-
-void line_put_char(struct tty_struct *tty, unsigned char ch)
-{
-	line_write(tty, &ch, sizeof(ch));
+out_up:
+	spin_unlock_irqrestore(&line->lock, flags);
+	return ret;
 }
 
 void line_set_termios(struct tty_struct *tty, struct termios * old)
@@ -159,11 +249,6 @@ void line_set_termios(struct tty_struct *tty, struct termios * old)
 	/* nothing */
 }
 
-int line_chars_in_buffer(struct tty_struct *tty)
-{
-	return 0;
-}
-
 static struct {
 	int  cmd;
 	char *level;
@@ -250,7 +335,7 @@ int line_ioctl(struct tty_struct *tty, struct file * file,
 		ret = -ENOIOCTLCMD;
 		break;
 	}
-	return(ret);
+	return ret;
 }
 
 static irqreturn_t line_write_interrupt(int irq, void *data,
@@ -260,18 +345,23 @@ static irqreturn_t line_write_interrupt(int irq, void *data,
 	struct line *line = tty->driver_data;
 	int err;
 
+	/* Interrupts are enabled here because we registered the interrupt with
+	 * SA_INTERRUPT (see line_setup_irq).*/
+
+	spin_lock_irq(&line->lock);
 	err = flush_buffer(line);
-	if(err == 0)
-		return(IRQ_NONE);
-	else if(err < 0){
+	if (err == 0) {
+		return IRQ_NONE;
+	} else if(err < 0) {
 		line->head = line->buffer;
 		line->tail = line->buffer;
 	}
+	spin_unlock_irq(&line->lock);
 
 	if(tty == NULL)
-		return(IRQ_NONE);
+		return IRQ_NONE;
 
-	if(test_bit(TTY_DO_WRITE_WAKEUP, &tty->flags) &&
+	if (test_bit(TTY_DO_WRITE_WAKEUP, &tty->flags) &&
 	   (tty->ldisc.write_wakeup != NULL))
 		(tty->ldisc.write_wakeup)(tty);
 	
@@ -281,9 +371,9 @@ static irqreturn_t line_write_interrupt(int irq, void *data,
 	 * writes.
 	 */
 
-	if(waitqueue_active(&tty->write_wait))
+	if (waitqueue_active(&tty->write_wait))
 		wake_up_interruptible(&tty->write_wait);
-	return(IRQ_HANDLED);
+	return IRQ_HANDLED;
 }
 
 int line_setup_irq(int fd, int input, int output, struct tty_struct *tty)
@@ -292,15 +382,18 @@ int line_setup_irq(int fd, int input, int output, struct tty_struct *tty)
 	struct line_driver *driver = line->driver;
 	int err = 0, flags = SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM;
 
-	if(input) err = um_request_irq(driver->read_irq, fd, IRQ_READ, 
+	if (input)
+		err = um_request_irq(driver->read_irq, fd, IRQ_READ,
 				       line_interrupt, flags, 
 				       driver->read_irq_name, tty);
-	if(err) return(err);
-	if(output) err = um_request_irq(driver->write_irq, fd, IRQ_WRITE, 
+	if (err)
+		return err;
+	if (output)
+		err = um_request_irq(driver->write_irq, fd, IRQ_WRITE,
 					line_write_interrupt, flags, 
 					driver->write_irq_name, tty);
 	line->have_irq = 1;
-	return(err);
+	return err;
 }
 
 void line_disable(struct tty_struct *tty, int current_irq)
@@ -336,7 +429,9 @@ int line_open(struct line *lines, struct tty_struct *tty,
 	line = &lines[tty->index];
 	tty->driver_data = line;
 
-	down(&line->sem);
+	/* The IRQ which takes this lock is not yet enabled and won't be run
+	 * before the end, so we don't need to use spin_lock_irq.*/
+	spin_lock(&line->lock);
 	if (tty->count == 1) {
 		if (!line->valid) {
 			err = -ENODEV;
@@ -349,6 +444,7 @@ int line_open(struct line *lines, struct tty_struct *tty,
 			err = open_chan(&line->chan_list);
 			if(err) goto out;
 		}
+		/* Here the interrupt is registered.*/
 		enable_chan(&line->chan_list, tty);
 		INIT_WORK(&line->task, line_timer_cb, tty);
 	}
@@ -362,21 +458,27 @@ int line_open(struct line *lines, struct tty_struct *tty,
 	line->count++;
 
 out:
-	up(&line->sem);
-	return(err);
+	spin_unlock(&line->lock);
+	return err;
 }
 
 void line_close(struct tty_struct *tty, struct file * filp)
 {
 	struct line *line = tty->driver_data;
 
-	down(&line->sem);
+	/* XXX: I assume this should be called in process context, not with interrupt
+	 * disabled!*/
+	spin_lock_irq(&line->lock);
+
+	/* We ignore the error anyway! */
+	flush_buffer(line);
+
 	line->count--;
 	if (tty->count == 1) {
 		line_disable(tty, -1);
 		tty->driver_data = NULL;
 	}
-	up(&line->sem);
+	spin_unlock_irq(&line->lock);
 }
 
 void close_lines(struct line *lines, int nlines)
@@ -387,31 +489,41 @@ void close_lines(struct line *lines, int nlines)
 		close_chan(&lines[i].chan_list);
 }
 
-int line_setup(struct line *lines, int num, char *init, int all_allowed)
+/* Common setup code for both startup command line and mconsole initialization.
+ * @lines contains the the array (of size @num) to modify;
+ * @init is the setup string;
+ * @all_allowed is a boolean saying if we can setup the whole @lines
+ * at once. For instance, it will be usually true for startup init. (where we
+ * can use con=xterm) and false for mconsole.*/
+
+int line_setup(struct line *lines, unsigned int num, char *init, int all_allowed)
 {
 	int i, n;
 	char *end;
 
-	if(*init == '=') n = -1;
-	else {
+	if(*init == '=') {
+		/* We said con=/ssl= instead of con#=, so we are configuring all
+		 * consoles at once.*/
+		n = -1;
+	} else {
 		n = simple_strtoul(init, &end, 0);
 		if(*end != '='){
 			printk(KERN_ERR "line_setup failed to parse \"%s\"\n", 
 			       init);
-			return(0);
+			return 0;
 		}
 		init = end;
 	}
 	init++;
-	if((n >= 0) && (n >= num)){
+
+	if (n >= (signed int) num) {
 		printk("line_setup - %d out of range ((0 ... %d) allowed)\n",
 		       n, num - 1);
-		return(0);
-	}
-	else if (n >= 0){
+		return 0;
+	} else if (n >= 0){
 		if (lines[n].count > 0) {
 			printk("line_setup - device %d is open\n", n);
-			return(0);
+			return 0;
 		}
 		if (lines[n].init_pri <= INIT_ONE){
 			lines[n].init_pri = INIT_ONE;
@@ -422,13 +534,11 @@ int line_setup(struct line *lines, int num, char *init, int all_allowed)
 				lines[n].valid = 1;
 			}	
 		}
-	}
-	else if(!all_allowed){
+	} else if(!all_allowed){
 		printk("line_setup - can't configure all devices from "
 		       "mconsole\n");
-		return(0);
-	}
-	else {
+		return 0;
+	} else {
 		for(i = 0; i < num; i++){
 			if(lines[i].init_pri <= INIT_ALL){
 				lines[i].init_pri = INIT_ALL;
@@ -440,21 +550,21 @@ int line_setup(struct line *lines, int num, char *init, int all_allowed)
 			}
 		}
 	}
-	return(1);
+	return 1;
 }
 
-int line_config(struct line *lines, int num, char *str)
+int line_config(struct line *lines, unsigned int num, char *str)
 {
 	char *new = uml_strdup(str);
 
 	if(new == NULL){
 		printk("line_config - uml_strdup failed\n");
-		return(-ENOMEM);
+		return -ENOMEM;
 	}
-	return(!line_setup(lines, num, new, 0));
+	return !line_setup(lines, num, new, 0);
 }
 
-int line_get_config(char *name, struct line *lines, int num, char *str, 
+int line_get_config(char *name, struct line *lines, unsigned int num, char *str,
 		    int size, char **error_out)
 {
 	struct line *line;
@@ -464,47 +574,33 @@ int line_get_config(char *name, struct line *lines, int num, char *str,
 	dev = simple_strtoul(name, &end, 0);
 	if((*end != '\0') || (end == name)){
 		*error_out = "line_get_config failed to parse device number";
-		return(0);
+		return 0;
 	}
 
 	if((dev < 0) || (dev >= num)){
-		*error_out = "device number of of range";
-		return(0);
+		*error_out = "device number out of range";
+		return 0;
 	}
 
 	line = &lines[dev];
 
-	down(&line->sem);
+	spin_lock(&line->lock);
 	if(!line->valid)
 		CONFIG_CHUNK(str, size, n, "none", 1);
 	else if(line->count == 0)
 		CONFIG_CHUNK(str, size, n, line->init_str, 1);
 	else n = chan_config_string(&line->chan_list, str, size, error_out);
-	up(&line->sem);
+	spin_unlock(&line->lock);
 
-	return(n);
+	return n;
 }
 
-int line_remove(struct line *lines, int num, char *str)
+int line_remove(struct line *lines, unsigned int num, char *str)
 {
 	char config[sizeof("conxxxx=none\0")];
 
 	sprintf(config, "%s=none", str);
-	return(!line_setup(lines, num, config, 0));
-}
-
-int line_write_room(struct tty_struct *tty)
-{
-	struct line *dev = tty->driver_data;
-	int room;
-
-	if (tty->stopped)
-		return 0;
-	room = write_room(dev);
-	if (0 == room)
-		printk(KERN_DEBUG "%s: %s: no room left in buffer\n",
-		       __FUNCTION__,tty->name);
-	return room;
+	return !line_setup(lines, num, config, 0);
 }
 
 struct tty_driver *line_register_devfs(struct lines *set,
@@ -553,7 +649,7 @@ void lines_init(struct line *lines, int nlines)
 	for(i = 0; i < nlines; i++){
 		line = &lines[i];
 		INIT_LIST_HEAD(&line->chan_list);
-		sema_init(&line->sem, 1);
+		spin_lock_init(&line->lock);
 		if(line->init_str != NULL){
 			line->init_str = uml_strdup(line->init_str);
 			if(line->init_str == NULL)
@@ -587,7 +683,7 @@ irqreturn_t winch_interrupt(int irq, void *data, struct pt_regs *unused)
 				       "errno = %d\n", -err);
 				printk("fd %d is losing SIGWINCH support\n",
 				       winch->tty_fd);
-				return(IRQ_HANDLED);
+				return IRQ_HANDLED;
 			}
 			goto out;
 		}
@@ -603,7 +699,7 @@ irqreturn_t winch_interrupt(int irq, void *data, struct pt_regs *unused)
  out:
 	if(winch->fd != -1)
 		reactivate_fd(winch->fd, WINCH_IRQ);
-	return(IRQ_HANDLED);
+	return IRQ_HANDLED;
 }
 
 DECLARE_MUTEX(winch_handler_sem);
@@ -625,7 +721,7 @@ void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty)
 				   .pid  	= pid,
 				   .tty 	= tty });
 	list_add(&winch->list, &winch_handlers);
-	if(um_request_irq(WINCH_IRQ, fd, IRQ_READ, winch_interrupt, 
+	if(um_request_irq(WINCH_IRQ, fd, IRQ_READ, winch_interrupt,
 			  SA_INTERRUPT | SA_SHIRQ | SA_SAMPLE_RANDOM, 
 			  "winch", winch) < 0)
 		printk("register_winch_irq - failed to register IRQ\n");
@@ -656,26 +752,16 @@ char *add_xterm_umid(char *base)
 	int len;
 
 	umid = get_umid(1);
-	if(umid == NULL) return(base);
+	if(umid == NULL)
+		return base;
 	
 	len = strlen(base) + strlen(" ()") + strlen(umid) + 1;
 	title = kmalloc(len, GFP_KERNEL);
 	if(title == NULL){
 		printk("Failed to allocate buffer for xterm title\n");
-		return(base);
+		return base;
 	}
 
 	snprintf(title, len, "%s (%s)", base, umid);
-	return(title);
+	return title;
 }
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/drivers/ssl.c b/arch/um/drivers/ssl.c
index c5839c3..a2bac42 100644
--- a/arch/um/drivers/ssl.c
+++ b/arch/um/drivers/ssl.c
@@ -107,11 +107,6 @@ int ssl_open(struct tty_struct *tty, struct file *filp)
 }
 
 #if 0
-static int ssl_chars_in_buffer(struct tty_struct *tty)
-{
-	return(0);
-}
-
 static void ssl_flush_buffer(struct tty_struct *tty)
 {
 	return;
@@ -149,11 +144,11 @@ static struct tty_operations ssl_ops = {
 	.put_char 		= line_put_char,
 	.write_room		= line_write_room,
 	.chars_in_buffer 	= line_chars_in_buffer,
+	.flush_buffer 		= line_flush_buffer,
+	.flush_chars 		= line_flush_chars,
 	.set_termios 		= line_set_termios,
 	.ioctl 	 		= line_ioctl,
 #if 0
-	.flush_chars 		= ssl_flush_chars,
-	.flush_buffer 		= ssl_flush_buffer,
 	.throttle 		= ssl_throttle,
 	.unthrottle 		= ssl_unthrottle,
 	.stop 	 		= ssl_stop,
@@ -171,10 +166,11 @@ static void ssl_console_write(struct console *c, const char *string,
 			      unsigned len)
 {
 	struct line *line = &serial_lines[c->index];
+	unsigned long flags;
 
-	down(&line->sem);
+	spin_lock_irqsave(&line->lock, flags);
 	console_write_chan(&line->chan_list, string, len);
-	up(&line->sem);
+	spin_unlock_irqrestore(&line->lock, flags);
 }
 
 static struct tty_driver *ssl_console_device(struct console *c, int *index)
@@ -238,14 +234,3 @@ static int ssl_chan_setup(char *str)
 
 __setup("ssl", ssl_chan_setup);
 __channel_help(ssl_chan_setup, "ssl");
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/drivers/stdio_console.c b/arch/um/drivers/stdio_console.c
index e604d7c..361d0be 100644
--- a/arch/um/drivers/stdio_console.c
+++ b/arch/um/drivers/stdio_console.c
@@ -116,8 +116,11 @@ static struct tty_operations console_ops = {
 	.open 	 		= con_open,
 	.close 	 		= line_close,
 	.write 	 		= line_write,
+	.put_char 		= line_put_char,
  	.write_room		= line_write_room,
 	.chars_in_buffer 	= line_chars_in_buffer,
+	.flush_buffer 		= line_flush_buffer,
+	.flush_chars 		= line_flush_chars,
 	.set_termios 		= line_set_termios,
 	.ioctl 	 		= line_ioctl,
 };
@@ -126,10 +129,11 @@ static void uml_console_write(struct console *console, const char *string,
 			  unsigned len)
 {
 	struct line *line = &vts[console->index];
+	unsigned long flags;
 
-	down(&line->sem);
+	spin_lock_irqsave(&line->lock, flags);
 	console_write_chan(&line->chan_list, string, len);
-	up(&line->sem);
+	spin_unlock_irqrestore(&line->lock, flags);
 }
 
 static struct tty_driver *uml_console_device(struct console *c, int *index)
@@ -192,14 +196,3 @@ static int console_chan_setup(char *str)
 }
 __setup("con", console_chan_setup);
 __channel_help(console_chan_setup, "con");
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 4d8b165..9a56ff9 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -156,6 +156,7 @@ static struct gendisk *fake_gendisk[MAX_DEV];
 static struct openflags global_openflags = OPEN_FLAGS;
 
 struct cow {
+	/* This is the backing file, actually */
 	char *file;
 	int fd;
 	unsigned long *bitmap;
@@ -927,10 +928,14 @@ static int ubd_open(struct inode *inode, struct file *filp)
 		}
 	}
 	dev->count++;
-	if((filp->f_mode & FMODE_WRITE) && !dev->openflags.w){
+	set_disk_ro(disk, !dev->openflags.w);
+
+	/* This should no more be needed. And it didn't work anyway to exclude
+	 * read-write remounting of filesystems.*/
+	/*if((filp->f_mode & FMODE_WRITE) && !dev->openflags.w){
 	        if(--dev->count == 0) ubd_close(dev);
 	        err = -EROFS;
-	}
+	}*/
  out:
 	return(err);
 }
@@ -1096,6 +1101,7 @@ static int prepare_request(struct request *req, struct io_thread_req *io_req)
 
 	if(req->rq_status == RQ_INACTIVE) return(1);
 
+	/* This should be impossible now */
 	if((rq_data_dir(req) == WRITE) && !dev->openflags.w){
 		printk("Write attempted on readonly ubd device %s\n", 
 		       disk->disk_name);
@@ -1243,6 +1249,7 @@ static int ubd_check_remapped(int fd, unsigned long address, int is_write,
 
 		/* It's a write to a ubd device */
 
+		/* This should be impossible now */
 		if(!dev->openflags.w){
 			/* It's a write access on a read-only device - probably
 			 * shouldn't happen.  If the kernel is trying to change
@@ -1605,8 +1612,7 @@ void do_io(struct io_thread_req *req)
 				}
 			} while((n < len) && (n != 0));
 			if (n < len) memset(&buf[n], 0, len - n);
-		}
-		else {
+		} else {
 			n = os_write_file(req->fds[bit], buf, len);
 			if(n != len){
 				printk("do_io - write failed err = %d "
diff --git a/arch/um/include/line.h b/arch/um/include/line.h
index 6d81ecc..4c5e92c 100644
--- a/arch/um/include/line.h
+++ b/arch/um/include/line.h
@@ -10,7 +10,7 @@
 #include "linux/workqueue.h"
 #include "linux/tty.h"
 #include "linux/interrupt.h"
-#include "asm/semaphore.h"
+#include "linux/spinlock.h"
 #include "chan_user.h"
 #include "mconsole_kern.h"
 
@@ -37,10 +37,18 @@ struct line {
 	struct list_head chan_list;
 	int valid;
 	int count;
-	struct semaphore sem;
+	/*This lock is actually, mostly, local to*/
+	spinlock_t lock;
+
+	/* Yes, this is a real circular buffer.
+	 * XXX: And this should become a struct kfifo!
+	 *
+	 * buffer points to a buffer allocated on demand, of length
+	 * LINE_BUFSIZE, head to the start of the ring, tail to the end.*/
 	char *buffer;
 	char *head;
 	char *tail;
+
 	int sigio;
 	struct work_struct task;
 	struct line_driver *driver;
@@ -52,7 +60,6 @@ struct line {
 	  init_pri :	INIT_STATIC, \
 	  chan_list : 	{ }, \
 	  valid :	1, \
-	  sem : 	{ }, \
 	  buffer :	NULL, \
 	  head :	NULL, \
 	  tail :	NULL, \
@@ -69,15 +76,18 @@ struct lines {
 extern void line_close(struct tty_struct *tty, struct file * filp);
 extern int line_open(struct line *lines, struct tty_struct *tty, 
 		     struct chan_opts *opts);
-extern int line_setup(struct line *lines, int num, char *init, 
+extern int line_setup(struct line *lines, unsigned int sizeof_lines, char *init,
 		      int all_allowed);
 extern int line_write(struct tty_struct *tty, const unsigned char *buf, int len);
 extern void line_put_char(struct tty_struct *tty, unsigned char ch);
 extern void line_set_termios(struct tty_struct *tty, struct termios * old);
 extern int line_chars_in_buffer(struct tty_struct *tty);
+extern void line_flush_buffer(struct tty_struct *tty);
+extern void line_flush_chars(struct tty_struct *tty);
 extern int line_write_room(struct tty_struct *tty);
 extern int line_ioctl(struct tty_struct *tty, struct file * file,
 		      unsigned int cmd, unsigned long arg);
+
 extern char *add_xterm_umid(char *base);
 extern int line_setup_irq(int fd, int input, int output, struct tty_struct *tty);
 extern void line_close_chan(struct line *line);
@@ -89,20 +99,10 @@ extern struct tty_driver * line_register_devfs(struct lines *set,
 				int nlines);
 extern void lines_init(struct line *lines, int nlines);
 extern void close_lines(struct line *lines, int nlines);
-extern int line_config(struct line *lines, int num, char *str);
-extern int line_remove(struct line *lines, int num, char *str);
-extern int line_get_config(char *dev, struct line *lines, int num, char *str, 
+
+extern int line_config(struct line *lines, unsigned int sizeof_lines, char *str);
+extern int line_remove(struct line *lines, unsigned int sizeof_lines, char *str);
+extern int line_get_config(char *dev, struct line *lines, unsigned int sizeof_lines, char *str,
 			   int size, char **error_out);
 
 #endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/include/sysdep-i386/syscalls.h b/arch/um/include/sysdep-i386/syscalls.h
index 5db81ec..be0a3e3 100644
--- a/arch/um/include/sysdep-i386/syscalls.h
+++ b/arch/um/include/sysdep-i386/syscalls.h
@@ -22,102 +22,3 @@ extern syscall_handler_t old_mmap_i386;
 extern long sys_mmap2(unsigned long addr, unsigned long len,
 		      unsigned long prot, unsigned long flags,
 		      unsigned long fd, unsigned long pgoff);
-
-/* On i386 they choose a meaningless naming.*/
-#define __NR_kexec_load __NR_sys_kexec_load
-
-#define ARCH_SYSCALLS \
-	[ __NR_waitpid ] = (syscall_handler_t *) sys_waitpid, \
-	[ __NR_break ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_oldstat ] = (syscall_handler_t *) sys_stat, \
-	[ __NR_umount ] = (syscall_handler_t *) sys_oldumount, \
-	[ __NR_stime ] = um_stime, \
-	[ __NR_oldfstat ] = (syscall_handler_t *) sys_fstat, \
-	[ __NR_stty ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_gtty ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_nice ] = (syscall_handler_t *) sys_nice, \
-	[ __NR_ftime ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_prof ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_signal ] = (syscall_handler_t *) sys_signal, \
-	[ __NR_lock ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_mpx ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_ulimit ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_oldolduname ] = (syscall_handler_t *) sys_olduname, \
-	[ __NR_sigaction ] = (syscall_handler_t *) sys_sigaction, \
-	[ __NR_sgetmask ] = (syscall_handler_t *) sys_sgetmask, \
-	[ __NR_ssetmask ] = (syscall_handler_t *) sys_ssetmask, \
-	[ __NR_sigsuspend ] = (syscall_handler_t *) sys_sigsuspend, \
-	[ __NR_sigpending ] = (syscall_handler_t *) sys_sigpending, \
-	[ __NR_oldlstat ] = (syscall_handler_t *) sys_lstat, \
-	[ __NR_readdir ] = old_readdir, \
-	[ __NR_profil ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_socketcall ] = (syscall_handler_t *) sys_socketcall, \
-	[ __NR_olduname ] = (syscall_handler_t *) sys_uname, \
-	[ __NR_iopl ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_idle ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_ipc ] = (syscall_handler_t *) sys_ipc, \
-	[ __NR_sigreturn ] = (syscall_handler_t *) sys_sigreturn, \
-	[ __NR_sigprocmask ] = (syscall_handler_t *) sys_sigprocmask, \
-	[ __NR_bdflush ] = (syscall_handler_t *) sys_bdflush, \
-	[ __NR__llseek ] = (syscall_handler_t *) sys_llseek, \
-	[ __NR__newselect ] = (syscall_handler_t *) sys_select, \
-	[ __NR_vm86 ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_mmap ] = (syscall_handler_t *) old_mmap_i386, \
-	[ __NR_ugetrlimit ] = (syscall_handler_t *) sys_getrlimit, \
-	[ __NR_mmap2 ] = (syscall_handler_t *) sys_mmap2, \
-	[ __NR_truncate64 ] = (syscall_handler_t *) sys_truncate64, \
-	[ __NR_ftruncate64 ] = (syscall_handler_t *) sys_ftruncate64, \
-	[ __NR_stat64 ] = (syscall_handler_t *) sys_stat64, \
-	[ __NR_lstat64 ] = (syscall_handler_t *) sys_lstat64, \
-	[ __NR_fstat64 ] = (syscall_handler_t *) sys_fstat64, \
-	[ __NR_fcntl64 ] = (syscall_handler_t *) sys_fcntl64, \
-	[ __NR_sendfile64 ] = (syscall_handler_t *) sys_sendfile64, \
-	[ __NR_statfs64 ] = (syscall_handler_t *) sys_statfs64, \
-	[ __NR_fstatfs64 ] = (syscall_handler_t *) sys_fstatfs64, \
-	[ __NR_fadvise64_64 ] = (syscall_handler_t *) sys_fadvise64_64, \
-	[ __NR_select ] = (syscall_handler_t *) old_select, \
-	[ __NR_vm86old ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_modify_ldt ] = (syscall_handler_t *) sys_modify_ldt, \
-	[ __NR_lchown32 ] = (syscall_handler_t *) sys_lchown, \
-	[ __NR_getuid32 ] = (syscall_handler_t *) sys_getuid, \
-	[ __NR_getgid32 ] = (syscall_handler_t *) sys_getgid, \
-	[ __NR_geteuid32 ] = (syscall_handler_t *) sys_geteuid, \
-	[ __NR_getegid32 ] = (syscall_handler_t *) sys_getegid, \
-	[ __NR_setreuid32 ] = (syscall_handler_t *) sys_setreuid, \
-	[ __NR_setregid32 ] = (syscall_handler_t *) sys_setregid, \
-	[ __NR_getgroups32 ] = (syscall_handler_t *) sys_getgroups, \
-	[ __NR_setgroups32 ] = (syscall_handler_t *) sys_setgroups, \
-	[ __NR_fchown32 ] = (syscall_handler_t *) sys_fchown, \
-	[ __NR_setresuid32 ] = (syscall_handler_t *) sys_setresuid, \
-	[ __NR_getresuid32 ] = (syscall_handler_t *) sys_getresuid, \
-	[ __NR_setresgid32 ] = (syscall_handler_t *) sys_setresgid, \
-	[ __NR_getresgid32 ] = (syscall_handler_t *) sys_getresgid, \
-	[ __NR_chown32 ] = (syscall_handler_t *) sys_chown, \
-	[ __NR_setuid32 ] = (syscall_handler_t *) sys_setuid, \
-	[ __NR_setgid32 ] = (syscall_handler_t *) sys_setgid, \
-	[ __NR_setfsuid32 ] = (syscall_handler_t *) sys_setfsuid, \
-	[ __NR_setfsgid32 ] = (syscall_handler_t *) sys_setfsgid, \
-	[ __NR_pivot_root ] = (syscall_handler_t *) sys_pivot_root, \
-	[ __NR_mincore ] = (syscall_handler_t *) sys_mincore, \
-	[ __NR_madvise ] = (syscall_handler_t *) sys_madvise, \
-	[ 222 ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ 223 ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_set_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_get_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ 251 ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ 285 ] = (syscall_handler_t *) sys_ni_syscall,
-
-/* 222 doesn't yet have a name in include/asm-i386/unistd.h */
-
-#define LAST_ARCH_SYSCALL 285
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/include/sysdep-x86_64/syscalls.h b/arch/um/include/sysdep-x86_64/syscalls.h
index b187a41..67923cc 100644
--- a/arch/um/include/sysdep-x86_64/syscalls.h
+++ b/arch/um/include/sysdep-x86_64/syscalls.h
@@ -26,66 +26,9 @@ extern syscall_handler_t *ia32_sys_call_table[];
 extern long old_mmap(unsigned long addr, unsigned long len,
 		     unsigned long prot, unsigned long flags,
 		     unsigned long fd, unsigned long pgoff);
-extern syscall_handler_t wrap_sys_shmat;
 extern syscall_handler_t sys_modify_ldt;
 extern syscall_handler_t sys_arch_prctl;
 
-#define ARCH_SYSCALLS \
-	[ __NR_mmap ] = (syscall_handler_t *) old_mmap, \
-	[ __NR_select ] = (syscall_handler_t *) sys_select, \
-	[ __NR_mincore ] = (syscall_handler_t *) sys_mincore, \
-	[ __NR_madvise ] = (syscall_handler_t *) sys_madvise, \
-	[ __NR_shmget ] = (syscall_handler_t *) sys_shmget, \
-	[ __NR_shmat ] = (syscall_handler_t *) wrap_sys_shmat, \
-	[ __NR_shmctl ] = (syscall_handler_t *) sys_shmctl, \
-	[ __NR_semop ] = (syscall_handler_t *) sys_semop, \
-	[ __NR_semget ] = (syscall_handler_t *) sys_semget, \
-	[ __NR_semctl ] = (syscall_handler_t *) sys_semctl, \
-	[ __NR_shmdt ] = (syscall_handler_t *) sys_shmdt, \
-	[ __NR_msgget ] = (syscall_handler_t *) sys_msgget, \
-	[ __NR_msgsnd ] = (syscall_handler_t *) sys_msgsnd, \
-	[ __NR_msgrcv ] = (syscall_handler_t *) sys_msgrcv, \
-	[ __NR_msgctl ] = (syscall_handler_t *) sys_msgctl, \
-	[ __NR_pivot_root ] = (syscall_handler_t *) sys_pivot_root, \
-	[ __NR_tuxcall ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_security ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_epoll_ctl_old ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_epoll_wait_old ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_modify_ldt ] = (syscall_handler_t *) sys_modify_ldt, \
-	[ __NR_arch_prctl ] = (syscall_handler_t *) sys_arch_prctl, \
-	[ __NR_socket ] = (syscall_handler_t *) sys_socket, \
-	[ __NR_connect ] = (syscall_handler_t *) sys_connect, \
-	[ __NR_accept ] = (syscall_handler_t *) sys_accept, \
-	[ __NR_recvfrom ] = (syscall_handler_t *) sys_recvfrom, \
-	[ __NR_recvmsg ] = (syscall_handler_t *) sys_recvmsg, \
-	[ __NR_sendmsg ] = (syscall_handler_t *) sys_sendmsg, \
-	[ __NR_bind ] = (syscall_handler_t *) sys_bind, \
-	[ __NR_listen ] = (syscall_handler_t *) sys_listen, \
-	[ __NR_getsockname ] = (syscall_handler_t *) sys_getsockname, \
-	[ __NR_getpeername ] = (syscall_handler_t *) sys_getpeername, \
-	[ __NR_socketpair ] = (syscall_handler_t *) sys_socketpair, \
-	[ __NR_sendto ] = (syscall_handler_t *) sys_sendto, \
-	[ __NR_shutdown ] = (syscall_handler_t *) sys_shutdown, \
-	[ __NR_setsockopt ] = (syscall_handler_t *) sys_setsockopt, \
-	[ __NR_getsockopt ] = (syscall_handler_t *) sys_getsockopt, \
-	[ __NR_iopl ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_set_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_get_thread_area ] = (syscall_handler_t *) sys_ni_syscall, \
-	[ __NR_semtimedop ] = (syscall_handler_t *) sys_semtimedop, \
-	[ 251 ] = (syscall_handler_t *) sys_ni_syscall,
-
-#define LAST_ARCH_SYSCALL 251
-#define NR_syscalls 1024
+#define NR_syscalls (__NR_syscall_max + 1)
 
 #endif
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index dc796c1..246f0e7 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -10,7 +10,7 @@ obj-y = checksum.o config.o exec_kern.o exitcode.o \
 	helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o mem_user.o \
 	physmem.o process.o process_kern.o ptrace.o reboot.o resource.o \
 	sigio_user.o sigio_kern.o signal_kern.o signal_user.o smp.o \
-	syscall_kern.o sysrq.o sys_call_table.o tempfile.o time.o time_kern.o \
+	syscall_kern.o sysrq.o tempfile.o time.o time_kern.o \
 	tlb.o trap_kern.o trap_user.o uaccess_user.o um_arch.o umid.o \
 	user_util.o
 
@@ -53,6 +53,7 @@ quiet_cmd_quote2 = QUOTE   $@
       cmd_quote2 = sed -e '/CONFIG/{'          \
 		  -e 's/"CONFIG"\;/""/'        \
 		  -e 'r $(obj)/config.tmp'     \
-		  -e 'a""\;'                   \
+		  -e 'a \'                     \
+		  -e '""\;'                    \
 		  -e '}'                       \
 		  $< > $@
diff --git a/arch/um/kernel/process_kern.c b/arch/um/kernel/process_kern.c
index 1d719d5..7a94369 100644
--- a/arch/um/kernel/process_kern.c
+++ b/arch/um/kernel/process_kern.c
@@ -161,10 +161,6 @@ void *get_current(void)
 	return(current);
 }
 
-void prepare_to_copy(struct task_struct *tsk)
-{
-}
-
 int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
 		unsigned long stack_top, struct task_struct * p, 
 		struct pt_regs *regs)
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index 3a99ee6..e50e60f 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -143,7 +143,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
 	case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
 	case PTRACE_CONT: { /* restart after signal. */
 		ret = -EIO;
-		if ((unsigned long) data > _NSIG)
+		if (!valid_signal(data))
 			break;
 
 		child->ptrace &= ~PT_DTRACE;
@@ -179,7 +179,7 @@ long sys_ptrace(long request, long pid, long addr, long data)
 
 	case PTRACE_SINGLESTEP: {  /* set the trap flag. */
 		ret = -EIO;
-		if ((unsigned long) data > _NSIG)
+		if (!valid_signal(data))
 			break;
 		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 		child->ptrace |= PT_DTRACE;
diff --git a/arch/um/kernel/skas/include/uaccess-skas.h b/arch/um/kernel/skas/include/uaccess-skas.h
index 11986c9..c356203 100644
--- a/arch/um/kernel/skas/include/uaccess-skas.h
+++ b/arch/um/kernel/skas/include/uaccess-skas.h
@@ -18,7 +18,7 @@
 	  ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \
 	  ((unsigned long) (addr) + (size) >= (unsigned long)(addr))))
 
-static inline int verify_area_skas(int type, const void * addr,
+static inline int __deprecated verify_area_skas(int type, const void * addr,
 				   unsigned long size)
 {
 	return(access_ok_skas(type, addr, size) ? 0 : -EFAULT);
diff --git a/arch/um/kernel/skas/uaccess.c b/arch/um/kernel/skas/uaccess.c
index 7575ec4..f7da9d0 100644
--- a/arch/um/kernel/skas/uaccess.c
+++ b/arch/um/kernel/skas/uaccess.c
@@ -3,6 +3,7 @@
  * Licensed under the GPL
  */
 
+#include "linux/compiler.h"
 #include "linux/stddef.h"
 #include "linux/kernel.h"
 #include "linux/string.h"
@@ -61,8 +62,7 @@ static void do_buffer_op(void *jmpbuf, void *arg_ptr)
 	void *arg;
 	int *res;
 
-	/* Some old gccs recognize __va_copy, but not va_copy */
-	__va_copy(args, *(va_list *)arg_ptr);
+	va_copy(args, *(va_list *)arg_ptr);
 	addr = va_arg(args, unsigned long);
 	len = va_arg(args, int);
 	is_write = va_arg(args, int);
diff --git a/arch/um/kernel/sys_call_table.c b/arch/um/kernel/sys_call_table.c
deleted file mode 100644
index 7fc06c8..0000000
--- a/arch/um/kernel/sys_call_table.c
+++ /dev/null
@@ -1,276 +0,0 @@
-/* 
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
- * Copyright 2003 PathScale, Inc.
- * Licensed under the GPL
- */
-
-#include "linux/config.h"
-#include "linux/unistd.h"
-#include "linux/sys.h"
-#include "linux/swap.h"
-#include "linux/syscalls.h"
-#include "linux/sysctl.h"
-#include "asm/signal.h"
-#include "sysdep/syscalls.h"
-#include "kern_util.h"
-
-#ifdef CONFIG_NFSD
-#define NFSSERVCTL sys_nfsservctl
-#else
-#define NFSSERVCTL sys_ni_syscall
-#endif
-
-#define LAST_GENERIC_SYSCALL __NR_keyctl
-
-#if LAST_GENERIC_SYSCALL > LAST_ARCH_SYSCALL
-#define LAST_SYSCALL LAST_GENERIC_SYSCALL
-#else
-#define LAST_SYSCALL LAST_ARCH_SYSCALL
-#endif
-
-extern syscall_handler_t sys_fork;
-extern syscall_handler_t sys_execve;
-extern syscall_handler_t um_time;
-extern syscall_handler_t um_stime;
-extern syscall_handler_t sys_pipe;
-extern syscall_handler_t sys_olduname;
-extern syscall_handler_t sys_sigaction;
-extern syscall_handler_t sys_sigsuspend;
-extern syscall_handler_t old_readdir;
-extern syscall_handler_t sys_uname;
-extern syscall_handler_t sys_ipc;
-extern syscall_handler_t sys_sigreturn;
-extern syscall_handler_t sys_clone;
-extern syscall_handler_t sys_rt_sigreturn;
-extern syscall_handler_t sys_sigaltstack;
-extern syscall_handler_t sys_vfork;
-extern syscall_handler_t old_select;
-extern syscall_handler_t sys_modify_ldt;
-extern syscall_handler_t sys_rt_sigsuspend;
-extern syscall_handler_t sys_mbind;
-extern syscall_handler_t sys_get_mempolicy;
-extern syscall_handler_t sys_set_mempolicy;
-extern syscall_handler_t sys_sys_setaltroot;
-
-syscall_handler_t *sys_call_table[] = {
-	[ __NR_restart_syscall ] = (syscall_handler_t *) sys_restart_syscall,
-	[ __NR_exit ] = (syscall_handler_t *) sys_exit,
-	[ __NR_fork ] = (syscall_handler_t *) sys_fork,
-	[ __NR_read ] = (syscall_handler_t *) sys_read,
-	[ __NR_write ] = (syscall_handler_t *) sys_write,
-
-	/* These three are declared differently in asm/unistd.h */
-	[ __NR_open ] = (syscall_handler_t *) sys_open,
-	[ __NR_close ] = (syscall_handler_t *) sys_close,
-	[ __NR_creat ] = (syscall_handler_t *) sys_creat,
-	[ __NR_link ] = (syscall_handler_t *) sys_link,
-	[ __NR_unlink ] = (syscall_handler_t *) sys_unlink,
-	[ __NR_execve ] = (syscall_handler_t *) sys_execve,
-
-	/* declared differently in kern_util.h */
-	[ __NR_chdir ] = (syscall_handler_t *) sys_chdir,
-	[ __NR_time ] = um_time,
-	[ __NR_mknod ] = (syscall_handler_t *) sys_mknod,
-	[ __NR_chmod ] = (syscall_handler_t *) sys_chmod,
-	[ __NR_lchown ] = (syscall_handler_t *) sys_lchown16,
-	[ __NR_lseek ] = (syscall_handler_t *) sys_lseek,
-	[ __NR_getpid ] = (syscall_handler_t *) sys_getpid,
-	[ __NR_mount ] = (syscall_handler_t *) sys_mount,
-	[ __NR_setuid ] = (syscall_handler_t *) sys_setuid16,
-	[ __NR_getuid ] = (syscall_handler_t *) sys_getuid16,
- 	[ __NR_ptrace ] = (syscall_handler_t *) sys_ptrace,
-	[ __NR_alarm ] = (syscall_handler_t *) sys_alarm,
-	[ __NR_pause ] = (syscall_handler_t *) sys_pause,
-	[ __NR_utime ] = (syscall_handler_t *) sys_utime,
-	[ __NR_access ] = (syscall_handler_t *) sys_access,
-	[ __NR_sync ] = (syscall_handler_t *) sys_sync,
-	[ __NR_kill ] = (syscall_handler_t *) sys_kill,
-	[ __NR_rename ] = (syscall_handler_t *) sys_rename,
-	[ __NR_mkdir ] = (syscall_handler_t *) sys_mkdir,
-	[ __NR_rmdir ] = (syscall_handler_t *) sys_rmdir,
-
-	/* Declared differently in asm/unistd.h */
-	[ __NR_dup ] = (syscall_handler_t *) sys_dup,
-	[ __NR_pipe ] = (syscall_handler_t *) sys_pipe,
-	[ __NR_times ] = (syscall_handler_t *) sys_times,
-	[ __NR_brk ] = (syscall_handler_t *) sys_brk,
-	[ __NR_setgid ] = (syscall_handler_t *) sys_setgid16,
-	[ __NR_getgid ] = (syscall_handler_t *) sys_getgid16,
-	[ __NR_geteuid ] = (syscall_handler_t *) sys_geteuid16,
-	[ __NR_getegid ] = (syscall_handler_t *) sys_getegid16,
-	[ __NR_acct ] = (syscall_handler_t *) sys_acct,
-	[ __NR_umount2 ] = (syscall_handler_t *) sys_umount,
-	[ __NR_ioctl ] = (syscall_handler_t *) sys_ioctl,
-	[ __NR_fcntl ] = (syscall_handler_t *) sys_fcntl,
-	[ __NR_setpgid ] = (syscall_handler_t *) sys_setpgid,
-	[ __NR_umask ] = (syscall_handler_t *) sys_umask,
-	[ __NR_chroot ] = (syscall_handler_t *) sys_chroot,
-	[ __NR_ustat ] = (syscall_handler_t *) sys_ustat,
-	[ __NR_dup2 ] = (syscall_handler_t *) sys_dup2,
-	[ __NR_getppid ] = (syscall_handler_t *) sys_getppid,
-	[ __NR_getpgrp ] = (syscall_handler_t *) sys_getpgrp,
-	[ __NR_setsid ] = (syscall_handler_t *) sys_setsid,
-	[ __NR_setreuid ] = (syscall_handler_t *) sys_setreuid16,
-	[ __NR_setregid ] = (syscall_handler_t *) sys_setregid16,
-	[ __NR_sethostname ] = (syscall_handler_t *) sys_sethostname,
-	[ __NR_setrlimit ] = (syscall_handler_t *) sys_setrlimit,
-	[ __NR_getrlimit ] = (syscall_handler_t *) sys_old_getrlimit,
-	[ __NR_getrusage ] = (syscall_handler_t *) sys_getrusage,
-	[ __NR_gettimeofday ] = (syscall_handler_t *) sys_gettimeofday,
-	[ __NR_settimeofday ] = (syscall_handler_t *) sys_settimeofday,
-	[ __NR_getgroups ] = (syscall_handler_t *) sys_getgroups16,
-	[ __NR_setgroups ] = (syscall_handler_t *) sys_setgroups16,
-	[ __NR_symlink ] = (syscall_handler_t *) sys_symlink,
-	[ __NR_readlink ] = (syscall_handler_t *) sys_readlink,
-	[ __NR_uselib ] = (syscall_handler_t *) sys_uselib,
-	[ __NR_swapon ] = (syscall_handler_t *) sys_swapon,
-	[ __NR_reboot ] = (syscall_handler_t *) sys_reboot,
-	[ __NR_munmap ] = (syscall_handler_t *) sys_munmap,
-	[ __NR_truncate ] = (syscall_handler_t *) sys_truncate,
-	[ __NR_ftruncate ] = (syscall_handler_t *) sys_ftruncate,
-	[ __NR_fchmod ] = (syscall_handler_t *) sys_fchmod,
-	[ __NR_fchown ] = (syscall_handler_t *) sys_fchown16,
-	[ __NR_getpriority ] = (syscall_handler_t *) sys_getpriority,
-	[ __NR_setpriority ] = (syscall_handler_t *) sys_setpriority,
-	[ __NR_statfs ] = (syscall_handler_t *) sys_statfs,
-	[ __NR_fstatfs ] = (syscall_handler_t *) sys_fstatfs,
-	[ __NR_ioperm ] = (syscall_handler_t *) sys_ni_syscall,
-	[ __NR_syslog ] = (syscall_handler_t *) sys_syslog,
-	[ __NR_setitimer ] = (syscall_handler_t *) sys_setitimer,
-	[ __NR_getitimer ] = (syscall_handler_t *) sys_getitimer,
-	[ __NR_stat ] = (syscall_handler_t *) sys_newstat,
-	[ __NR_lstat ] = (syscall_handler_t *) sys_newlstat,
-	[ __NR_fstat ] = (syscall_handler_t *) sys_newfstat,
-	[ __NR_vhangup ] = (syscall_handler_t *) sys_vhangup,
-	[ __NR_wait4 ] = (syscall_handler_t *) sys_wait4,
-	[ __NR_swapoff ] = (syscall_handler_t *) sys_swapoff,
-	[ __NR_sysinfo ] = (syscall_handler_t *) sys_sysinfo,
-	[ __NR_fsync ] = (syscall_handler_t *) sys_fsync,
-	[ __NR_clone ] = (syscall_handler_t *) sys_clone,
-	[ __NR_setdomainname ] = (syscall_handler_t *) sys_setdomainname,
-	[ __NR_uname ] = (syscall_handler_t *) sys_newuname,
-	[ __NR_adjtimex ] = (syscall_handler_t *) sys_adjtimex,
-	[ __NR_mprotect ] = (syscall_handler_t *) sys_mprotect,
-	[ __NR_create_module ] = (syscall_handler_t *) sys_ni_syscall,
-	[ __NR_init_module ] = (syscall_handler_t *) sys_init_module,
-	[ __NR_delete_module ] = (syscall_handler_t *) sys_delete_module,
-	[ __NR_get_kernel_syms ] = (syscall_handler_t *) sys_ni_syscall,
-	[ __NR_quotactl ] = (syscall_handler_t *) sys_quotactl,
-	[ __NR_getpgid ] = (syscall_handler_t *) sys_getpgid,
-	[ __NR_fchdir ] = (syscall_handler_t *) sys_fchdir,
-	[ __NR_sysfs ] = (syscall_handler_t *) sys_sysfs,
-	[ __NR_personality ] = (syscall_handler_t *) sys_personality,
-	[ __NR_afs_syscall ] = (syscall_handler_t *) sys_ni_syscall,
-	[ __NR_setfsuid ] = (syscall_handler_t *) sys_setfsuid16,
-	[ __NR_setfsgid ] = (syscall_handler_t *) sys_setfsgid16,
-	[ __NR_getdents ] = (syscall_handler_t *) sys_getdents,
-	[ __NR_flock ] = (syscall_handler_t *) sys_flock,
-	[ __NR_msync ] = (syscall_handler_t *) sys_msync,
-	[ __NR_readv ] = (syscall_handler_t *) sys_readv,
-	[ __NR_writev ] = (syscall_handler_t *) sys_writev,
-	[ __NR_getsid ] = (syscall_handler_t *) sys_getsid,
-	[ __NR_fdatasync ] = (syscall_handler_t *) sys_fdatasync,
-	[ __NR__sysctl ] = (syscall_handler_t *) sys_sysctl,
-	[ __NR_mlock ] = (syscall_handler_t *) sys_mlock,
-	[ __NR_munlock ] = (syscall_handler_t *) sys_munlock,
-	[ __NR_mlockall ] = (syscall_handler_t *) sys_mlockall,
-	[ __NR_munlockall ] = (syscall_handler_t *) sys_munlockall,
-	[ __NR_sched_setparam ] = (syscall_handler_t *) sys_sched_setparam,
-	[ __NR_sched_getparam ] = (syscall_handler_t *) sys_sched_getparam,
-	[ __NR_sched_setscheduler ] = (syscall_handler_t *) sys_sched_setscheduler,
-	[ __NR_sched_getscheduler ] = (syscall_handler_t *) sys_sched_getscheduler,
-	[ __NR_sched_yield ] = (syscall_handler_t *) yield,
-	[ __NR_sched_get_priority_max ] = (syscall_handler_t *) sys_sched_get_priority_max,
-	[ __NR_sched_get_priority_min ] = (syscall_handler_t *) sys_sched_get_priority_min,
-	[ __NR_sched_rr_get_interval ] = (syscall_handler_t *) sys_sched_rr_get_interval,
-	[ __NR_nanosleep ] = (syscall_handler_t *) sys_nanosleep,
-	[ __NR_mremap ] = (syscall_handler_t *) sys_mremap,
-	[ __NR_setresuid ] = (syscall_handler_t *) sys_setresuid16,
-	[ __NR_getresuid ] = (syscall_handler_t *) sys_getresuid16,
-	[ __NR_query_module ] = (syscall_handler_t *) sys_ni_syscall,
-	[ __NR_poll ] = (syscall_handler_t *) sys_poll,
-	[ __NR_nfsservctl ] = (syscall_handler_t *) NFSSERVCTL,
-	[ __NR_setresgid ] = (syscall_handler_t *) sys_setresgid16,
-	[ __NR_getresgid ] = (syscall_handler_t *) sys_getresgid16,
-	[ __NR_prctl ] = (syscall_handler_t *) sys_prctl,
-	[ __NR_rt_sigreturn ] = (syscall_handler_t *) sys_rt_sigreturn,
-	[ __NR_rt_sigaction ] = (syscall_handler_t *) sys_rt_sigaction,
-	[ __NR_rt_sigprocmask ] = (syscall_handler_t *) sys_rt_sigprocmask,
-	[ __NR_rt_sigpending ] = (syscall_handler_t *) sys_rt_sigpending,
-	[ __NR_rt_sigtimedwait ] = (syscall_handler_t *) sys_rt_sigtimedwait,
-	[ __NR_rt_sigqueueinfo ] = (syscall_handler_t *) sys_rt_sigqueueinfo,
-	[ __NR_rt_sigsuspend ] = (syscall_handler_t *) sys_rt_sigsuspend,
-	[ __NR_pread64 ] = (syscall_handler_t *) sys_pread64,
-	[ __NR_pwrite64 ] = (syscall_handler_t *) sys_pwrite64,
-	[ __NR_chown ] = (syscall_handler_t *) sys_chown16,
-	[ __NR_getcwd ] = (syscall_handler_t *) sys_getcwd,
-	[ __NR_capget ] = (syscall_handler_t *) sys_capget,
-	[ __NR_capset ] = (syscall_handler_t *) sys_capset,
-	[ __NR_sigaltstack ] = (syscall_handler_t *) sys_sigaltstack,
-	[ __NR_sendfile ] = (syscall_handler_t *) sys_sendfile,
-	[ __NR_getpmsg ] = (syscall_handler_t *) sys_ni_syscall,
-	[ __NR_putpmsg ] = (syscall_handler_t *) sys_ni_syscall,
-	[ __NR_vfork ] = (syscall_handler_t *) sys_vfork,
-	[ __NR_getdents64 ] = (syscall_handler_t *) sys_getdents64,
-	[ __NR_gettid ] = (syscall_handler_t *) sys_gettid,
-	[ __NR_readahead ] = (syscall_handler_t *) sys_readahead,
-	[ __NR_setxattr ] = (syscall_handler_t *) sys_setxattr,
-	[ __NR_lsetxattr ] = (syscall_handler_t *) sys_lsetxattr,
-	[ __NR_fsetxattr ] = (syscall_handler_t *) sys_fsetxattr,
-	[ __NR_getxattr ] = (syscall_handler_t *) sys_getxattr,
-	[ __NR_lgetxattr ] = (syscall_handler_t *) sys_lgetxattr,
-	[ __NR_fgetxattr ] = (syscall_handler_t *) sys_fgetxattr,
-	[ __NR_listxattr ] = (syscall_handler_t *) sys_listxattr,
-	[ __NR_llistxattr ] = (syscall_handler_t *) sys_llistxattr,
-	[ __NR_flistxattr ] = (syscall_handler_t *) sys_flistxattr,
-	[ __NR_removexattr ] = (syscall_handler_t *) sys_removexattr,
-	[ __NR_lremovexattr ] = (syscall_handler_t *) sys_lremovexattr,
-	[ __NR_fremovexattr ] = (syscall_handler_t *) sys_fremovexattr,
-	[ __NR_tkill ] = (syscall_handler_t *) sys_tkill,
-	[ __NR_futex ] = (syscall_handler_t *) sys_futex,
-	[ __NR_sched_setaffinity ] = (syscall_handler_t *) sys_sched_setaffinity,
-	[ __NR_sched_getaffinity ] = (syscall_handler_t *) sys_sched_getaffinity,
-	[ __NR_io_setup ] = (syscall_handler_t *) sys_io_setup,
-	[ __NR_io_destroy ] = (syscall_handler_t *) sys_io_destroy,
-	[ __NR_io_getevents ] = (syscall_handler_t *) sys_io_getevents,
-	[ __NR_io_submit ] = (syscall_handler_t *) sys_io_submit,
-	[ __NR_io_cancel ] = (syscall_handler_t *) sys_io_cancel,
-	[ __NR_exit_group ] = (syscall_handler_t *) sys_exit_group,
-	[ __NR_lookup_dcookie ] = (syscall_handler_t *) sys_lookup_dcookie,
-	[ __NR_epoll_create ] = (syscall_handler_t *) sys_epoll_create,
-	[ __NR_epoll_ctl ] = (syscall_handler_t *) sys_epoll_ctl,
-	[ __NR_epoll_wait ] = (syscall_handler_t *) sys_epoll_wait,
-	[ __NR_remap_file_pages ] = (syscall_handler_t *) sys_remap_file_pages,
-	[ __NR_set_tid_address ] = (syscall_handler_t *) sys_set_tid_address,
-	[ __NR_timer_create ] = (syscall_handler_t *) sys_timer_create,
-	[ __NR_timer_settime ] = (syscall_handler_t *) sys_timer_settime,
-	[ __NR_timer_gettime ] = (syscall_handler_t *) sys_timer_gettime,
-	[ __NR_timer_getoverrun ] = (syscall_handler_t *) sys_timer_getoverrun,
-	[ __NR_timer_delete ] = (syscall_handler_t *) sys_timer_delete,
-	[ __NR_clock_settime ] = (syscall_handler_t *) sys_clock_settime,
-	[ __NR_clock_gettime ] = (syscall_handler_t *) sys_clock_gettime,
-	[ __NR_clock_getres ] = (syscall_handler_t *) sys_clock_getres,
-	[ __NR_clock_nanosleep ] = (syscall_handler_t *) sys_clock_nanosleep,
-	[ __NR_tgkill ] = (syscall_handler_t *) sys_tgkill,
-	[ __NR_utimes ] = (syscall_handler_t *) sys_utimes,
-	[ __NR_fadvise64 ] = (syscall_handler_t *) sys_fadvise64,
-	[ __NR_vserver ] = (syscall_handler_t *) sys_ni_syscall,
-	[ __NR_mbind ] = (syscall_handler_t *) sys_mbind,
-	[ __NR_get_mempolicy ] = (syscall_handler_t *) sys_get_mempolicy,
-	[ __NR_set_mempolicy ] = (syscall_handler_t *) sys_set_mempolicy,
-	[ __NR_mq_open ] = (syscall_handler_t *) sys_mq_open,
-	[ __NR_mq_unlink ] = (syscall_handler_t *) sys_mq_unlink,
-	[ __NR_mq_timedsend ] = (syscall_handler_t *) sys_mq_timedsend,
-	[ __NR_mq_timedreceive ] = (syscall_handler_t *) sys_mq_timedreceive,
-	[ __NR_mq_notify ] = (syscall_handler_t *) sys_mq_notify,
-	[ __NR_mq_getsetattr ] = (syscall_handler_t *) sys_mq_getsetattr,
-	[ __NR_kexec_load ] = (syscall_handler_t *) sys_ni_syscall,
-	[ __NR_waitid ] = (syscall_handler_t *) sys_waitid,
-	[ __NR_add_key ] = (syscall_handler_t *) sys_add_key,
-	[ __NR_request_key ] = (syscall_handler_t *) sys_request_key,
-	[ __NR_keyctl ] = (syscall_handler_t *) sys_keyctl,
-
-	ARCH_SYSCALLS
-	[ LAST_SYSCALL + 1 ... NR_syscalls ] = 
-		(syscall_handler_t *) sys_ni_syscall
-};
diff --git a/arch/um/kernel/tt/include/uaccess-tt.h b/arch/um/kernel/tt/include/uaccess-tt.h
index f0bad01..bb69d6b 100644
--- a/arch/um/kernel/tt/include/uaccess-tt.h
+++ b/arch/um/kernel/tt/include/uaccess-tt.h
@@ -33,7 +33,7 @@ extern unsigned long uml_physmem;
          (((unsigned long) (addr) <= ((unsigned long) (addr) + (size))) && \
           (under_task_size(addr, size) || is_stack(addr, size))))
 
-static inline int verify_area_tt(int type, const void * addr,
+static inline int __deprecated verify_area_tt(int type, const void * addr,
 				 unsigned long size)
 {
 	return(access_ok_tt(type, addr, size) ? 0 : -EFAULT);
diff --git a/arch/um/os-Linux/sys-i386/registers.c b/arch/um/os-Linux/sys-i386/registers.c
index 148645b..9a0ad09 100644
--- a/arch/um/os-Linux/sys-i386/registers.c
+++ b/arch/um/os-Linux/sys-i386/registers.c
@@ -105,14 +105,15 @@ void init_registers(int pid)
 		panic("check_ptrace : PTRACE_GETREGS failed, errno = %d",
 		      err);
 
+	errno = 0;
 	err = ptrace(PTRACE_GETFPXREGS, pid, 0, exec_fpx_regs);
 	if(!err)
 		return;
+	if(errno != EIO)
+		panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
+		      errno);
 
 	have_fpx_regs = 0;
-	if(err != EIO)
-		panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
-		      err);
 
 	err = ptrace(PTRACE_GETFPREGS, pid, 0, exec_fp_regs);
 	if(err)
diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile
index 71b47e6..950781e 100644
--- a/arch/um/sys-i386/Makefile
+++ b/arch/um/sys-i386/Makefile
@@ -1,5 +1,6 @@
 obj-y = bitops.o bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \
-	ptrace_user.o semaphore.o signal.o sigcontext.o syscalls.o sysrq.o
+	ptrace_user.o semaphore.o signal.o sigcontext.o syscalls.o sysrq.o \
+	sys_call_table.o
 
 obj-$(CONFIG_HIGHMEM) += highmem.o
 obj-$(CONFIG_MODULES) += module.o
diff --git a/arch/um/sys-i386/sys_call_table.S b/arch/um/sys-i386/sys_call_table.S
new file mode 100644
index 0000000..ad75c27
--- /dev/null
+++ b/arch/um/sys-i386/sys_call_table.S
@@ -0,0 +1,16 @@
+#include <linux/linkage.h>
+/* Steal i386 syscall table for our purposes, but with some slight changes.*/
+
+#define sys_iopl sys_ni_syscall
+#define sys_ioperm sys_ni_syscall
+
+#define sys_vm86old sys_ni_syscall
+#define sys_vm86 sys_ni_syscall
+#define sys_set_thread_area sys_ni_syscall
+#define sys_get_thread_area sys_ni_syscall
+
+#define sys_stime um_stime
+#define sys_time um_time
+#define old_mmap old_mmap_i386
+
+#include "../../i386/kernel/syscall_table.S"
diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile
index 2129e31..d7ed2f7 100644
--- a/arch/um/sys-x86_64/Makefile
+++ b/arch/um/sys-x86_64/Makefile
@@ -6,7 +6,7 @@
 
 lib-y = bitops.o bugs.o csum-partial.o delay.o fault.o mem.o memcpy.o \
 	ptrace.o ptrace_user.o semaphore.o sigcontext.o signal.o \
-	syscalls.o sysrq.o thunk.o
+	syscalls.o sysrq.o thunk.o syscall_table.o
 
 USER_OBJS := ptrace_user.o sigcontext.o
 
diff --git a/arch/um/sys-x86_64/syscall_table.c b/arch/um/sys-x86_64/syscall_table.c
new file mode 100644
index 0000000..34b2e84
--- /dev/null
+++ b/arch/um/sys-x86_64/syscall_table.c
@@ -0,0 +1,59 @@
+/* System call table for UML/x86-64, copied from arch/x86_64/kernel/syscall.c
+ * with some changes for UML. */
+
+#include <linux/linkage.h>
+#include <linux/sys.h>
+#include <linux/cache.h>
+#include <linux/config.h>
+
+#define __NO_STUBS
+
+/* Below you can see, in terms of #define's, the differences between the x86-64
+ * and the UML syscall table. */
+
+/* Not going to be implemented by UML, since we have no hardware. */
+#define stub_iopl sys_ni_syscall
+#define sys_ioperm sys_ni_syscall
+
+/* The UML TLS problem. Note that x86_64 does not implement this, so the below
+ * is needed only for the ia32 compatibility. */
+/*#define sys_set_thread_area sys_ni_syscall
+#define sys_get_thread_area sys_ni_syscall*/
+
+/* For __NR_time. The x86-64 name hopefully will change from sys_time64 to
+ * sys_time (since the current situation is bogus). I've sent a patch to cleanup
+ * this. Remove below the obsoleted line. */
+#define sys_time64 um_time
+#define sys_time um_time
+
+/* On UML we call it this way ("old" means it's not mmap2) */
+#define sys_mmap old_mmap
+/* On x86-64 sys_uname is actually sys_newuname plus a compatibility trick.
+ * See arch/x86_64/kernel/sys_x86_64.c */
+#define sys_uname sys_uname64
+
+#define stub_clone sys_clone
+#define stub_fork sys_fork
+#define stub_vfork sys_vfork
+#define stub_execve sys_execve
+#define stub_rt_sigsuspend sys_rt_sigsuspend
+#define stub_sigaltstack sys_sigaltstack
+#define stub_rt_sigreturn sys_rt_sigreturn
+
+#define __SYSCALL(nr, sym) extern asmlinkage void sym(void) ;
+#undef _ASM_X86_64_UNISTD_H_
+#include <asm-x86_64/unistd.h>
+
+#undef __SYSCALL
+#define __SYSCALL(nr, sym) [ nr ] = sym,
+#undef _ASM_X86_64_UNISTD_H_
+
+typedef void (*sys_call_ptr_t)(void);
+
+extern void sys_ni_syscall(void);
+
+sys_call_ptr_t sys_call_table[__NR_syscall_max+1] __cacheline_aligned = {
+	/* Smells like a like a compiler bug -- it doesn't work when the & below is removed. */
+	[0 ... __NR_syscall_max] = &sys_ni_syscall,
+#include <asm-x86_64/unistd.h>
+};
diff --git a/arch/um/sys-x86_64/syscalls.c b/arch/um/sys-x86_64/syscalls.c
index 68205a0..ab4b0ab 100644
--- a/arch/um/sys-x86_64/syscalls.c
+++ b/arch/um/sys-x86_64/syscalls.c
@@ -14,11 +14,15 @@
 #include "asm/prctl.h" /* XXX This should get the constants from libc */
 #include "choose-mode.h"
 
-asmlinkage long wrap_sys_shmat(int shmid, char __user *shmaddr, int shmflg)
+asmlinkage long sys_uname64(struct new_utsname __user * name)
 {
-	unsigned long raddr;
-
-	return do_shmat(shmid, shmaddr, shmflg, &raddr) ?: (long) raddr;
+	int err;
+	down_read(&uts_sem);
+	err = copy_to_user(name, &system_utsname, sizeof (*name));
+	up_read(&uts_sem);
+	if (personality(current->personality) == PER_LINUX32)
+		err |= copy_to_user(&name->machine, "i686", 5);
+	return err ? -EFAULT : 0;
 }
 
 #ifdef CONFIG_MODE_TT