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Diffstat (limited to 'arch/um/include/line.h')
-rw-r--r--arch/um/include/line.h57
1 files changed, 27 insertions, 30 deletions
diff --git a/arch/um/include/line.h b/arch/um/include/line.h
index 5f232ae89fb..1223f2c844b 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);