1 files changed, 27 insertions, 30 deletions

diff --git a/arch/um/include/line.h b/arch/um/include/line.h
index 5f232ae89fbb..1223f2c844b4 100644
--- a/arch/um/include/line.h
+++ b/arch/um/include/line.h
@@ -11,36 +11,37 @@
 #include "linux/tty.h"
 #include "linux/interrupt.h"
 #include "linux/spinlock.h"
+#include "linux/mutex.h"
 #include "chan_user.h"
 #include "mconsole_kern.h"
 
+/* There's only one modifiable field in this - .mc.list */
 struct line_driver {
-	char *name;
-	char *device_name;
-	short major;
-	short minor_start;
-	short type;
-	short subtype;
-	int read_irq;
-	char *read_irq_name;
-	int write_irq;
-	char *write_irq_name;
-	char *symlink_from;
-	char *symlink_to;
+	const char *name;
+	const char *device_name;
+	const short major;
+	const short minor_start;
+	const short type;
+	const short subtype;
+	const int read_irq;
+	const char *read_irq_name;
+	const int write_irq;
+	const char *write_irq_name;
 	struct mc_device mc;
 };
 
 struct line {
 	struct tty_struct *tty;
+	spinlock_t count_lock;
+	int valid;
+
 	char *init_str;
 	int init_pri;
 	struct list_head chan_list;
-	int valid;
-	int count;
-	int throttled;
+
 	/*This lock is actually, mostly, local to*/
 	spinlock_t lock;
-
+	int throttled;
 	/* Yes, this is a real circular buffer.
 	 * XXX: And this should become a struct kfifo!
 	 *
@@ -57,22 +58,17 @@ struct line {
 };
 
 #define LINE_INIT(str, d) \
-	{ .init_str =	str, \
+	{ .count_lock =	SPIN_LOCK_UNLOCKED, \
+	  .init_str =	str,	\
 	  .init_pri =	INIT_STATIC, \
 	  .valid =	1, \
 	  .lock =	SPIN_LOCK_UNLOCKED, \
 	  .driver =	d }
 
-struct lines {
-	int num;
-};
-
-#define LINES_INIT(n) {  .num =	n }
-
 extern void line_close(struct tty_struct *tty, struct file * filp);
 extern int line_open(struct line *lines, struct tty_struct *tty);
 extern int line_setup(struct line *lines, unsigned int sizeof_lines,
-		      char *init);
+		      char *init, char **error_out);
 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);
@@ -90,17 +86,18 @@ extern char *add_xterm_umid(char *base);
 extern int line_setup_irq(int fd, int input, int output, struct line *line,
 			  void *data);
 extern void line_close_chan(struct line *line);
-extern struct tty_driver * line_register_devfs(struct lines *set,
-					       struct line_driver *line_driver,
-					       const struct tty_operations *driver,
-					       struct line *lines, int nlines);
+extern struct tty_driver *register_lines(struct line_driver *line_driver,
+					 const struct tty_operations *driver,
+					 struct line *lines, int nlines);
 extern void lines_init(struct line *lines, int nlines, struct chan_opts *opts);
 extern void close_lines(struct line *lines, int nlines);
 
 extern int line_config(struct line *lines, unsigned int sizeof_lines,
-		       char *str, const struct chan_opts *opts);
+		       char *str, const struct chan_opts *opts,
+		       char **error_out);
 extern int line_id(char **str, int *start_out, int *end_out);
-extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n);
+extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n,
+		       char **error_out);
 extern int line_get_config(char *dev, struct line *lines,
 			   unsigned int sizeof_lines, char *str,
 			   int size, char **error_out);