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tty: vt: remove vc_uniscr_debug_check()

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VC_UNI_SCREEN_DEBUG is always defined as 0, so this code is never
executed. Drop it along with VC_UNI_SCREEN_DEBUG.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230112080136.4929-1-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby (SUSE) 2023-01-12 09:01:26 +01:00 committed by Greg Kroah-Hartman
parent 885692ae3c
commit 3831c2a454
1 changed files with 0 additions and 40 deletions
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40
drivers/tty/vt/vt.c
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@ -323,8 +323,6 @@ void schedule_console_callback(void)
#define get_vc_uniscr(vc) vc->vc_uni_screen
#endif
#define VC_UNI_SCREEN_DEBUG 0
typedef uint32_t char32_t;
/*
@ -580,43 +578,6 @@ void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed,
}
}
/* this is for validation and debugging only */
static void vc_uniscr_debug_check(struct vc_data *vc)
{
struct uni_screen *uniscr = get_vc_uniscr(vc);
unsigned short *p;
int x, y, mask;
if (!VC_UNI_SCREEN_DEBUG || !uniscr)
return;
WARN_CONSOLE_UNLOCKED();
/*
* Make sure our unicode screen translates into the same glyphs
* as the actual screen. This is brutal indeed.
*/
p = (unsigned short *)vc->vc_origin;
mask = vc->vc_hi_font_mask | 0xff;
for (y = 0; y < vc->vc_rows; y++) {
char32_t *line = uniscr->lines[y];
for (x = 0; x < vc->vc_cols; x++) {
u16 glyph = scr_readw(p++) & mask;
char32_t uc = line[x];
int tc = conv_uni_to_pc(vc, uc);
if (tc == -4)
tc = conv_uni_to_pc(vc, 0xfffd);
if (tc == -4)
tc = conv_uni_to_pc(vc, '?');
if (tc != glyph)
pr_err_ratelimited(
"%s: mismatch at %d,%d: glyph=%#x tc=%#x\n",
__func__, x, y, glyph, tc);
}
}
}
static void con_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
enum con_scroll dir, unsigned int nr)
{
@ -2959,7 +2920,6 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
goto rescan_last_byte;
}
con_flush(vc, &draw);
vc_uniscr_debug_check(vc);
console_conditional_schedule();
notify_update(vc);
console_unlock();