Make console charset translation optional

By turning off the new CONSOLE_TRANSLATIONS option and dropping the
associated code and tables from the kernel, we can save about 7KiB.

Taken from linux-tiny project by Tim Bird and mangled further by dwmw2.

Signed-off-by: Tim Bird <tim.bird@am.sony.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

3 files changed, 11 insertions, 3 deletions

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 595a925c62a9..b7f7371dee73 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -36,6 +36,14 @@ config VT
           If unsure, say Y, or else you won't be able to do much with your new
           shiny Linux system :-)
 
+config CONSOLE_TRANSLATIONS
+        depends on VT
+        default y
+        bool "Enable character translations in console" if EMBEDDED
+        ---help---
+          This enables support for font mapping and Unicode translation
+          on virtual consoles.
+
 config VT_CONSOLE
         bool "Support for console on virtual terminal" if EMBEDDED
         depends on VT
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 4c1c584e9eb6..6ef173cab144 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -12,8 +12,8 @@ obj-y	 += mem.o random.o tty_io.o n_tty.o tty_ioctl.o
 obj-$(CONFIG_LEGACY_PTYS)       += pty.o
 obj-$(CONFIG_UNIX98_PTYS)       += pty.o
 obj-y                           += misc.o
-obj-$(CONFIG_VT)                += vt_ioctl.o vc_screen.o consolemap.o \
-                                   consolemap_deftbl.o selection.o keyboard.o
+obj-$(CONFIG_VT)                += vt_ioctl.o vc_screen.o selection.o keyboard.o
+obj-$(CONFIG_CONSOLE_TRANSLATIONS) += consolemap.o consolemap_deftbl.o
 obj-$(CONFIG_HW_CONSOLE)        += vt.o defkeymap.o
 obj-$(CONFIG_AUDIT)             += tty_audit.o
 obj-$(CONFIG_MAGIC_SYSRQ)       += sysrq.o
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index fa1ffbf2c621..18b7fb06dace 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -2208,7 +2208,7 @@ rescan_last_byte:
                         c = 0xfffd;
                     tc = c;
                 } else {        /* no utf or alternate charset mode */
-                    tc = vc->vc_translate[vc->vc_toggle_meta ? (c | 0x80) : c];
+                    tc = vc_translate(vc, c);
                 }
 
                 param.c = tc;