[PATCH] uml: console locking commentary and code cleanup

Remove the last vestiges of devfs from console registration.  Change the name
of the function, plus remove a couple of unused fields from the line_driver
structure.

struct lines is no longer needed, all traces of it are gone.

The only way that I can see to mark a structure as being almost-const is to
individually const the fields.  This is the case for the line_driver
structure, which has only one modifiable field - a list_head in a
sub-structure.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 14 insertions, 22 deletions

diff --git a/arch/um/include/line.h b/arch/um/include/line.h
index a2486b4..3477a85 100644
--- a/arch/um/include/line.h
+++ b/arch/um/include/line.h
@@ -15,19 +15,18 @@
 #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;
 };
 
@@ -67,12 +66,6 @@ struct line {
 	  .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,
@@ -94,10 +87,9 @@ 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);