uml: fix FP register corruption

[safe/jmp/linux-2.6] / arch / um / include / line.h

diff --git a/arch/um/include/line.h b/arch/um/include/line.h
index 315788c..1223f2c 100644 (file)
--- a/arch/um/include/line.h
+++ b/arch/um/include/line.h
@@ -11,35 +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;
-       char *devfs_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;
+
        /*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!
         *
@@ -50,62 +52,52 @@ struct line {
        char *tail;
 
        int sigio;
-       struct work_struct task;
-       struct line_driver *driver;
+       struct delayed_work task;
+       const struct line_driver *driver;
        int have_irq;
 };
 
 #define LINE_INIT(str, d) \
-       { init_str :    str, \
-         init_pri :    INIT_STATIC, \
-         chan_list :   { }, \
-         valid :       1, \
-         buffer :      NULL, \
-         head :        NULL, \
-         tail :        NULL, \
-         sigio :       0, \
-         driver :      d, \
-         have_irq :    0 }
-
-struct lines {
-       int num;
-};
-
-#define LINES_INIT(n) {  num :         n }
+       { .count_lock = SPIN_LOCK_UNLOCKED, \
+         .init_str =   str,    \
+         .init_pri =   INIT_STATIC, \
+         .valid =      1, \
+         .lock =       SPIN_LOCK_UNLOCKED, \
+         .driver =     d }
 
 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, unsigned int sizeof_lines, char *init,
-                     int all_allowed);
+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 **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);
-extern void line_set_termios(struct tty_struct *tty, struct termios * old);
+extern void line_set_termios(struct tty_struct *tty, struct ktermios * 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 void line_throttle(struct tty_struct *tty);
+extern void line_unthrottle(struct tty_struct *tty);
 
 extern char *add_xterm_umid(char *base);
-extern int line_setup_irq(int fd, int input, int output,
-                         struct tty_struct *tty);
+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 void line_disable(struct tty_struct *tty, int current_irq);
-extern struct tty_driver * line_register_devfs(struct lines *set,
-                               struct line_driver *line_driver,
-                               struct tty_operations *driver,
-                               struct line *lines,
-                               int nlines);
-extern void lines_init(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);
+                      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);