vt,console,kdb: implement atomic console enter/leave functions

[sfrench/cifs-2.6.git] / include / linux / console.h

diff --git a/include/linux/console.h b/include/linux/console.h
index dcca5339ceb3c65711d9fce57d27bec70153029f..f76fc297322dcb0395dad79c04cdd32aac80815f 100644 (file)
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -55,6 +55,16 @@ struct consw {
        void    (*con_invert_region)(struct vc_data *, u16 *, int);
        u16    *(*con_screen_pos)(struct vc_data *, int);
        unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *);
+       /*
+        * Prepare the console for the debugger.  This includes, but is not
+        * limited to, unblanking the console, loading an appropriate
+        * palette, and allowing debugger generated output.
+        */
+       int     (*con_debug_enter)(struct vc_data *);
+       /*
+        * Restore the console to its pre-debug state as closely as possible.
+        */
+       int     (*con_debug_leave)(struct vc_data *);
 };
 
 extern const struct consw *conswitchp;
@@ -69,6 +79,9 @@ int register_con_driver(const struct consw *csw, int first, int last);
 int unregister_con_driver(const struct consw *csw);
 int take_over_console(const struct consw *sw, int first, int last, int deflt);
 void give_up_console(const struct consw *sw);
+int con_debug_enter(struct vc_data *vc);
+int con_debug_leave(void);
+
 /* scroll */
 #define SM_UP       (1)
 #define SM_DOWN     (2)