vt:tackle kbd_table

Keyboard struct lifetime is easy, but the locking is not and is completely
ignored by the existing code. Tackle this one head on

- Make the kbd_table private so we can run down all direct users
- Hoick the relevant ioctl handlers into the keyboard layer
- Lock them with the keyboard lock so they don't change mid keypress
- Add helpers for things like console stop/start so we isolate the poking
  around properly
- Tweak the braille console so it still builds

There are a couple of FIXME locking cases left for ioctls that are so hideous
they should be addressed in a later patch. After this patch the kbd_table is
private and all the keyboard jiggery pokery is in one place.

This update fixes speakup and also a memory leak in the original.

Signed-off-by: Alan Cox <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

drivers/accessibility/braille/braille_console.c

@@ -244,16 +244,13 @@ static int keyboard_notifier_call(struct notifier_block *blk,
 
 			switch (val) {
 			case KVAL(K_CAPS):
-				on_off = vc_kbd_led(kbd_table + fg_console,
-						VC_CAPSLOCK);
+				on_off = vt_get_leds(fg_console, VC_CAPSLOCK);
 				break;
 			case KVAL(K_NUM):
-				on_off = vc_kbd_led(kbd_table + fg_console,
-						VC_NUMLOCK);
+				on_off = vt_get_leds(fg_console, VC_NUMLOCK);
 				break;
 			case KVAL(K_HOLD):
-				on_off = vc_kbd_led(kbd_table + fg_console,
-						VC_SCROLLOCK);
+				on_off = vt_get_leds(fg_console, VC_SCROLLOCK);
 				break;
 			}
 			if (on_off == 1)

drivers/staging/speakup/main.c

@@ -1731,15 +1731,15 @@ static void do_handle_spec(struct vc_data *vc, u_char value, char up_flag)
 	switch (value) {
 	case KVAL(K_CAPS):
 		label = msg_get(MSG_KEYNAME_CAPSLOCK);
-		on_off = (vc_kbd_led(kbd_table + vc->vc_num, VC_CAPSLOCK));
+		on_off = vt_get_leds(fg_console, VC_CAPSLOCK);
 		break;
 	case KVAL(K_NUM):
 		label = msg_get(MSG_KEYNAME_NUMLOCK);
-		on_off = (vc_kbd_led(kbd_table + vc->vc_num, VC_NUMLOCK));
+		on_off = vt_get_leds(fg_console, VC_NUMLOCK);
 		break;
 	case KVAL(K_HOLD):
 		label = msg_get(MSG_KEYNAME_SCROLLLOCK);
-		on_off = (vc_kbd_led(kbd_table + vc->vc_num, VC_SCROLLOCK));
+		on_off = vt_get_leds(fg_console, VC_SCROLLOCK);
 		if (speakup_console[vc->vc_num])
 			speakup_console[vc->vc_num]->tty_stopped = on_off;
 		break;
@@ -2020,7 +2020,7 @@ speakup_key(struct vc_data *vc, int shift_state, int keycode, u_short keysym,
 	if (type >= 0xf0)
 		type -= 0xf0;
 	if (type == KT_PAD
-		&& (vc_kbd_led(kbd_table + fg_console, VC_NUMLOCK))) {
+		&& (vt_get_leds(fg_console, VC_NUMLOCK))) {
 		if (up_flag) {
 			spk_keydown = 0;
 			goto out;

drivers/tty/sysrq.c

@@ -110,11 +110,9 @@ static struct sysrq_key_op sysrq_SAK_op = {
 #ifdef CONFIG_VT
 static void sysrq_handle_unraw(int key)
 {
-	struct kbd_struct *kbd = &kbd_table[fg_console];
-
-	if (kbd)
-		kbd->kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
+	vt_reset_unicode(fg_console);
 }
+
 static struct sysrq_key_op sysrq_unraw_op = {
 	.handler	= sysrq_handle_unraw,
 	.help_msg	= "unRaw",