vt: selection, introduce vc_is_sel

commit dce05aa6eec977f1472abed95ccd71276b9a3864 upstream.

Avoid global variables (namely sel_cons) by introducing vc_is_sel. It
checks whether the parameter is the current selection console. This will
help putting sel_cons to a struct later.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20200219073951.16151-1-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c
index d7d2e4b..7556139 100644 (file)
--- a/drivers/tty/vt/selection.c
+++ b/drivers/tty/vt/selection.c
@@ -88,6 +88,11 @@ void clear_selection(void)
 }
 EXPORT_SYMBOL_GPL(clear_selection);
 
+bool vc_is_sel(struct vc_data *vc)
+{
+       return vc == sel_cons;
+}
+
 /*
  * User settable table: what characters are to be considered alphabetic?
  * 128 bits. Locked by the console lock.

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index e9e27ba..7d89e06 100644 (file)
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -890,8 +890,9 @@ static void hide_softcursor(struct vc_data *vc)
 
 static void hide_cursor(struct vc_data *vc)
 {
-       if (vc == sel_cons)
+       if (vc_is_sel(vc))
                clear_selection();
+
        vc->vc_sw->con_cursor(vc, CM_ERASE);
        hide_softcursor(vc);
 }
@@ -901,7 +902,7 @@ static void set_cursor(struct vc_data *vc)
        if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS)
                return;
        if (vc->vc_deccm) {
-               if (vc == sel_cons)
+               if (vc_is_sel(vc))
                        clear_selection();
                add_softcursor(vc);
                if ((vc->vc_cursor_type & 0x0f) != 1)
@@ -1207,7 +1208,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
                }
        }
 
-       if (vc == sel_cons)
+       if (vc_is_sel(vc))
                clear_selection();
 
        old_rows = vc->vc_rows;

diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index ee6c91e..bf4daa0 100644 (file)
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -43,7 +43,7 @@ char vt_dont_switch;
 extern struct tty_driver *console_driver;
 
 #define VT_IS_IN_USE(i)        (console_driver->ttys[i] && console_driver->ttys[i]->count)
-#define VT_BUSY(i)     (VT_IS_IN_USE(i) || i == fg_console || vc_cons[i].d == sel_cons)
+#define VT_BUSY(i)     (VT_IS_IN_USE(i) || i == fg_console || vc_is_sel(vc_cons[i].d))
 
 /*
  * Console (vt and kd) routines, as defined by USL SVR4 manual, and by

diff --git a/include/linux/selection.h b/include/linux/selection.h
index e2c1f96..5b890ef 100644 (file)
--- a/include/linux/selection.h
+++ b/include/linux/selection.h
@@ -11,8 +11,8 @@
 #include <linux/tiocl.h>
 #include <linux/vt_buffer.h>
 
-extern struct vc_data *sel_cons;
 struct tty_struct;
+struct vc_data;
 
 extern void clear_selection(void);
 extern int set_selection_user(const struct tiocl_selection __user *sel,
@@ -24,6 +24,8 @@ extern int sel_loadlut(char __user *p);
 extern int mouse_reporting(void);
 extern void mouse_report(struct tty_struct * tty, int butt, int mrx, int mry);
 
+bool vc_is_sel(struct vc_data *vc);
+
 extern int console_blanked;
 
 extern const unsigned char color_table[];