Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6

[mv-sheeva.git] / drivers / char / vt.c

diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 1e3d728dbf7e15a9c15664562c1057a376f33434..50faa1fb0f06f57f419e96f5e9c974d6a7d08b70 100644 (file)
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -164,6 +164,9 @@ module_param(default_utf8, int, S_IRUGO | S_IWUSR);
 int global_cursor_default = -1;
 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
 
+static int cur_default = CUR_DEFAULT;
+module_param(cur_default, int, S_IRUGO | S_IWUSR);
+
 /*
  * ignore_poke: don't unblank the screen when things are typed.  This is
  * mainly for the privacy of braille terminal users.
@@ -184,12 +187,10 @@ static DECLARE_WORK(console_work, console_callback);
  * fg_console is the current virtual console,
  * last_console is the last used one,
  * want_console is the console we want to switch to,
- * kmsg_redirect is the console for kernel messages,
  */
 int fg_console;
 int last_console;
 int want_console = -1;
-int kmsg_redirect;
 
 /*
  * For each existing display, we have a pointer to console currently visible
@@ -1638,7 +1639,7 @@ static void reset_terminal(struct vc_data *vc, int do_clear)
        /* do not do set_leds here because this causes an endless tasklet loop
           when the keyboard hasn't been initialized yet */
 
-       vc->vc_cursor_type = CUR_DEFAULT;
+       vc->vc_cursor_type = cur_default;
        vc->vc_complement_mask = vc->vc_s_complement_mask;
 
        default_attr(vc);
@@ -1840,7 +1841,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
                                if (vc->vc_par[0])
                                        vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
                                else
-                                       vc->vc_cursor_type = CUR_DEFAULT;
+                                       vc->vc_cursor_type = cur_default;
                                return;
                        }
                        break;
@@ -2434,6 +2435,37 @@ struct tty_driver *console_driver;
 
 #ifdef CONFIG_VT_CONSOLE
 
+/**
+ * vt_kmsg_redirect() - Sets/gets the kernel message console
+ * @new:       The new virtual terminal number or -1 if the console should stay
+ *             unchanged
+ *
+ * By default, the kernel messages are always printed on the current virtual
+ * console. However, the user may modify that default with the
+ * TIOCL_SETKMSGREDIRECT ioctl call.
+ *
+ * This function sets the kernel message console to be @new. It returns the old
+ * virtual console number. The virtual terminal number 0 (both as parameter and
+ * return value) means no redirection (i.e. always printed on the currently
+ * active console).
+ *
+ * The parameter -1 means that only the current console is returned, but the
+ * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
+ * case to make the code more understandable.
+ *
+ * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
+ * the parameter and always returns 0.
+ */
+int vt_kmsg_redirect(int new)
+{
+       static int kmsg_con;
+
+       if (new != -1)
+               return xchg(&kmsg_con, new);
+       else
+               return kmsg_con;
+}
+
 /*
  *     Console on virtual terminal
  *
@@ -2448,6 +2480,7 @@ static void vt_console_print(struct console *co, const char *b, unsigned count)
        const ushort *start;
        ushort cnt = 0;
        ushort myx;
+       int kmsg_console;
 
        /* console busy or not yet initialized */
        if (!printable)
@@ -2455,8 +2488,9 @@ static void vt_console_print(struct console *co, const char *b, unsigned count)
        if (!spin_trylock(&printing_lock))
                return;
 
-       if (kmsg_redirect && vc_cons_allocated(kmsg_redirect - 1))
-               vc = vc_cons[kmsg_redirect - 1].d;
+       kmsg_console = vt_get_kmsg_redirect();
+       if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
+               vc = vc_cons[kmsg_console - 1].d;
 
        /* read `x' only after setting currcons properly (otherwise
           the `x' macro will read the x of the foreground console). */
@@ -2613,7 +2647,7 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
                        ret = set_vesa_blanking(p);
                        break;
                case TIOCL_GETKMSGREDIRECT:
-                       data = kmsg_redirect;
+                       data = vt_get_kmsg_redirect();
                        ret = __put_user(data, p);
                        break;
                case TIOCL_SETKMSGREDIRECT:
@@ -2623,7 +2657,7 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
                                if (get_user(data, p+1))
                                        ret = -EFAULT;
                                else
-                                       kmsg_redirect = data;
+                                       vt_kmsg_redirect(data);
                        }
                        break;
                case TIOCL_GETFGCONSOLE: