tty/vt: consolemap: make parameters of inverse_translate() saner

- int use_unicode -> bool: it's used as bool at some places already, so
make it explicit.
- int glyph -> u16: every caller passes a u16 in. So make it explicit
too. And remove a negative check from inverse_translate() as it never
could be negative.

Reviewed-by: Ilpo Järvinen <[e-mail]>
Signed-off-by: Jiri Slaby <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/accessibility/braille/braille_console.c

···
 	for (i = 0; i < WIDTH; i++) {
 		u16 glyph = screen_glyph(vc,
 				2 * (vc_x + i) + vc_y * vc->vc_size_row);
-		buf[i] = inverse_translate(vc, glyph, 1);
+		buf[i] = inverse_translate(vc, glyph, true);
 	}
 	braille_write(buf);
 }

drivers/accessibility/speakup/main.c

···
 			c |= 0x100;
 		}
 
-		ch = inverse_translate(vc, c, 1);
+		ch = inverse_translate(vc, c, true);
 		*attribs = (w & 0xff00) >> 8;
 	}
 	return ch;

drivers/tty/vt/consolemap.c

···
  *    was active.
  * Still, it is now possible to a certain extent to cut and paste non-ASCII.
  */
-u16 inverse_translate(const struct vc_data *conp, int glyph, int use_unicode)
+u16 inverse_translate(const struct vc_data *conp, u16 glyph, bool use_unicode)
 {
 	struct uni_pagedict *p;
 	int m;
 
-	if (glyph < 0 || glyph >= MAX_GLYPH)
+	if (glyph >= MAX_GLYPH)
 		return 0;
 
 	p = *conp->vc_uni_pagedir_loc;

drivers/tty/vt/selection.c

···
 {
 	if (unicode)
 		return screen_glyph_unicode(vc_sel.cons, n / 2);
-	return inverse_translate(vc_sel.cons, screen_glyph(vc_sel.cons, n), 0);
+	return inverse_translate(vc_sel.cons, screen_glyph(vc_sel.cons, n),
+			false);
 }
 
 /**

drivers/tty/vt/vt.c

···
 
 	if (uniscr)
 		return uniscr->lines[n / vc->vc_cols][n % vc->vc_cols];
-	return inverse_translate(vc, screen_glyph(vc, n * 2), 1);
+	return inverse_translate(vc, screen_glyph(vc, n * 2), true);
 }
 EXPORT_SYMBOL_GPL(screen_glyph_unicode);
 

include/linux/consolemap.h

···
 struct vc_data;
 
 #ifdef CONFIG_CONSOLE_TRANSLATIONS
-u16 inverse_translate(const struct vc_data *conp, int glyph, int use_unicode);
+u16 inverse_translate(const struct vc_data *conp, u16 glyph, bool use_unicode);
 unsigned short *set_translate(int m, struct vc_data *vc);
 int conv_uni_to_pc(struct vc_data *conp, long ucs);
 u32 conv_8bit_to_uni(unsigned char c);
 int conv_uni_to_8bit(u32 uni);
 void console_map_init(void);
 #else
-static inline u16 inverse_translate(const struct vc_data *conp, int glyph,
-		int use_unicode)
+static inline u16 inverse_translate(const struct vc_data *conp, u16 glyph,
+		bool use_unicode)
 {
 	return glyph;
 }