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tty: vt, consw->con_set_palette cleanup

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* allow NULL consw->con_set_palette (some consoles define an empty
  hook)
* => remove empty hooks now
* return value of consw->con_set_palette is never checked => make the
  function void
* document consw->con_set_palette a bit

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Cc: linux-usb@vger.kernel.org
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-fbdev@vger.kernel.org
Cc: linux-parisc@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby
2016-06-23 13:34:27 +02:00
committed by Greg Kroah-Hartman
parent 97293de977
commit 709280da62
9 changed files with 15 additions and 38 deletions
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4
include/linux/console.h
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@@ -31,6 +31,7 @@ struct tty_struct;
/**
* struct consw - callbacks for consoles
*
* @con_set_palette: sets the palette of the console to @table (optional)
* @con_scrolldelta: the contents of the console should be scrolled by @lines.
* Invoked by user. (optional)
*/
@@ -53,7 +54,8 @@ struct consw {
int (*con_font_copy)(struct vc_data *, int);
int (*con_resize)(struct vc_data *, unsigned int, unsigned int,
unsigned int);
int (*con_set_palette)(struct vc_data *, const unsigned char *);
void (*con_set_palette)(struct vc_data *,
const unsigned char *table);
void (*con_scrolldelta)(struct vc_data *, int lines);
int (*con_set_origin)(struct vc_data *);
void (*con_save_screen)(struct vc_data *);