Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 71 insertions, 424 deletions

diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index 65447c5f91d..ede2ef18d2f 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -130,7 +130,7 @@ static void vt_event_wait(struct vt_event_wait *vw)
 	list_add(&vw->list, &vt_events);
 	spin_unlock_irqrestore(&vt_event_lock, flags);
 	/* Wait for it to pass */
-	wait_event_interruptible_tty(vt_event_waitqueue, vw->done);
+	wait_event_interruptible(vt_event_waitqueue, vw->done);
 	/* Dequeue it */
 	spin_lock_irqsave(&vt_event_lock, flags);
 	list_del(&vw->list);
@@ -195,232 +195,7 @@ int vt_waitactive(int n)
 #define GPLAST 0x3df
 #define GPNUM (GPLAST - GPFIRST + 1)
 
-#define i (tmp.kb_index)
-#define s (tmp.kb_table)
-#define v (tmp.kb_value)
-static inline int
-do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm, struct kbd_struct *kbd)
-{
-	struct kbentry tmp;
-	ushort *key_map, val, ov;
-
-	if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
-		return -EFAULT;
 
-	if (!capable(CAP_SYS_TTY_CONFIG))
-		perm = 0;
-
-	switch (cmd) {
-	case KDGKBENT:
-		key_map = key_maps[s];
-		if (key_map) {
-		    val = U(key_map[i]);
-		    if (kbd->kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES)
-			val = K_HOLE;
-		} else
-		    val = (i ? K_HOLE : K_NOSUCHMAP);
-		return put_user(val, &user_kbe->kb_value);
-	case KDSKBENT:
-		if (!perm)
-			return -EPERM;
-		if (!i && v == K_NOSUCHMAP) {
-			/* deallocate map */
-			key_map = key_maps[s];
-			if (s && key_map) {
-			    key_maps[s] = NULL;
-			    if (key_map[0] == U(K_ALLOCATED)) {
-					kfree(key_map);
-					keymap_count--;
-			    }
-			}
-			break;
-		}
-
-		if (KTYP(v) < NR_TYPES) {
-		    if (KVAL(v) > max_vals[KTYP(v)])
-				return -EINVAL;
-		} else
-		    if (kbd->kbdmode != VC_UNICODE)
-				return -EINVAL;
-
-		/* ++Geert: non-PC keyboards may generate keycode zero */
-#if !defined(__mc68000__) && !defined(__powerpc__)
-		/* assignment to entry 0 only tests validity of args */
-		if (!i)
-			break;
-#endif
-
-		if (!(key_map = key_maps[s])) {
-			int j;
-
-			if (keymap_count >= MAX_NR_OF_USER_KEYMAPS &&
-			    !capable(CAP_SYS_RESOURCE))
-				return -EPERM;
-
-			key_map = kmalloc(sizeof(plain_map),
-						     GFP_KERNEL);
-			if (!key_map)
-				return -ENOMEM;
-			key_maps[s] = key_map;
-			key_map[0] = U(K_ALLOCATED);
-			for (j = 1; j < NR_KEYS; j++)
-				key_map[j] = U(K_HOLE);
-			keymap_count++;
-		}
-		ov = U(key_map[i]);
-		if (v == ov)
-			break;	/* nothing to do */
-		/*
-		 * Attention Key.
-		 */
-		if (((ov == K_SAK) || (v == K_SAK)) && !capable(CAP_SYS_ADMIN))
-			return -EPERM;
-		key_map[i] = U(v);
-		if (!s && (KTYP(ov) == KT_SHIFT || KTYP(v) == KT_SHIFT))
-			compute_shiftstate();
-		break;
-	}
-	return 0;
-}
-#undef i
-#undef s
-#undef v
-
-static inline int 
-do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc, int perm)
-{
-	struct kbkeycode tmp;
-	int kc = 0;
-
-	if (copy_from_user(&tmp, user_kbkc, sizeof(struct kbkeycode)))
-		return -EFAULT;
-	switch (cmd) {
-	case KDGETKEYCODE:
-		kc = getkeycode(tmp.scancode);
-		if (kc >= 0)
-			kc = put_user(kc, &user_kbkc->keycode);
-		break;
-	case KDSETKEYCODE:
-		if (!perm)
-			return -EPERM;
-		kc = setkeycode(tmp.scancode, tmp.keycode);
-		break;
-	}
-	return kc;
-}
-
-static inline int
-do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm)
-{
-	struct kbsentry *kbs;
-	char *p;
-	u_char *q;
-	u_char __user *up;
-	int sz;
-	int delta;
-	char *first_free, *fj, *fnw;
-	int i, j, k;
-	int ret;
-
-	if (!capable(CAP_SYS_TTY_CONFIG))
-		perm = 0;
-
-	kbs = kmalloc(sizeof(*kbs), GFP_KERNEL);
-	if (!kbs) {
-		ret = -ENOMEM;
-		goto reterr;
-	}
-
-	/* we mostly copy too much here (512bytes), but who cares ;) */
-	if (copy_from_user(kbs, user_kdgkb, sizeof(struct kbsentry))) {
-		ret = -EFAULT;
-		goto reterr;
-	}
-	kbs->kb_string[sizeof(kbs->kb_string)-1] = '\0';
-	i = kbs->kb_func;
-
-	switch (cmd) {
-	case KDGKBSENT:
-		sz = sizeof(kbs->kb_string) - 1; /* sz should have been
-						  a struct member */
-		up = user_kdgkb->kb_string;
-		p = func_table[i];
-		if(p)
-			for ( ; *p && sz; p++, sz--)
-				if (put_user(*p, up++)) {
-					ret = -EFAULT;
-					goto reterr;
-				}
-		if (put_user('\0', up)) {
-			ret = -EFAULT;
-			goto reterr;
-		}
-		kfree(kbs);
-		return ((p && *p) ? -EOVERFLOW : 0);
-	case KDSKBSENT:
-		if (!perm) {
-			ret = -EPERM;
-			goto reterr;
-		}
-
-		q = func_table[i];
-		first_free = funcbufptr + (funcbufsize - funcbufleft);
-		for (j = i+1; j < MAX_NR_FUNC && !func_table[j]; j++) 
-			;
-		if (j < MAX_NR_FUNC)
-			fj = func_table[j];
-		else
-			fj = first_free;
-
-		delta = (q ? -strlen(q) : 1) + strlen(kbs->kb_string);
-		if (delta <= funcbufleft) { 	/* it fits in current buf */
-		    if (j < MAX_NR_FUNC) {
-			memmove(fj + delta, fj, first_free - fj);
-			for (k = j; k < MAX_NR_FUNC; k++)
-			    if (func_table[k])
-				func_table[k] += delta;
-		    }
-		    if (!q)
-		      func_table[i] = fj;
-		    funcbufleft -= delta;
-		} else {			/* allocate a larger buffer */
-		    sz = 256;
-		    while (sz < funcbufsize - funcbufleft + delta)
-		      sz <<= 1;
-		    fnw = kmalloc(sz, GFP_KERNEL);
-		    if(!fnw) {
-		      ret = -ENOMEM;
-		      goto reterr;
-		    }
-
-		    if (!q)
-		      func_table[i] = fj;
-		    if (fj > funcbufptr)
-			memmove(fnw, funcbufptr, fj - funcbufptr);
-		    for (k = 0; k < j; k++)
-		      if (func_table[k])
-			func_table[k] = fnw + (func_table[k] - funcbufptr);
-
-		    if (first_free > fj) {
-			memmove(fnw + (fj - funcbufptr) + delta, fj, first_free - fj);
-			for (k = j; k < MAX_NR_FUNC; k++)
-			  if (func_table[k])
-			    func_table[k] = fnw + (func_table[k] - funcbufptr) + delta;
-		    }
-		    if (funcbufptr != func_buf)
-		      kfree(funcbufptr);
-		    funcbufptr = fnw;
-		    funcbufleft = funcbufleft - delta + sz - funcbufsize;
-		    funcbufsize = sz;
-		}
-		strcpy(func_table[i], kbs->kb_string);
-		break;
-	}
-	ret = 0;
-reterr:
-	kfree(kbs);
-	return ret;
-}
 
 static inline int 
 do_fontx_ioctl(int cmd, struct consolefontdesc __user *user_cfd, int perm, struct console_font_op *op)
@@ -497,7 +272,6 @@ int vt_ioctl(struct tty_struct *tty,
 {
 	struct vc_data *vc = tty->driver_data;
 	struct console_font_op op;	/* used in multiple places here */
-	struct kbd_struct * kbd;
 	unsigned int console;
 	unsigned char ucval;
 	unsigned int uival;
@@ -507,7 +281,6 @@ int vt_ioctl(struct tty_struct *tty,
 
 	console = vc->vc_num;
 
-	tty_lock();
 
 	if (!vc_cons_allocated(console)) { 	/* impossible? */
 		ret = -ENOIOCTLCMD;
@@ -523,19 +296,18 @@ int vt_ioctl(struct tty_struct *tty,
 	if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG))
 		perm = 1;
  
-	kbd = kbd_table + console;
 	switch (cmd) {
 	case TIOCLINUX:
 		ret = tioclinux(tty, arg);
 		break;
 	case KIOCSOUND:
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 		/*
 		 * The use of PIT_TICK_RATE is historic, it used to be
 		 * the platform-dependent CLOCK_TICK_RATE between 2.6.12
 		 * and 2.6.36, which was a minor but unfortunate ABI
-		 * change.
+		 * change. kd_mksound is locked by the input layer.
 		 */
 		if (arg)
 			arg = PIT_TICK_RATE / arg;
@@ -544,7 +316,7 @@ int vt_ioctl(struct tty_struct *tty,
 
 	case KDMKTONE:
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 	{
 		unsigned int ticks, count;
 		
@@ -562,10 +334,11 @@ int vt_ioctl(struct tty_struct *tty,
 
 	case KDGKBTYPE:
 		/*
-		 * this is naive.
+		 * this is naïve.
 		 */
 		ucval = KB_101;
-		goto setchar;
+		ret = put_user(ucval, (char __user *)arg);
+		break;
 
 		/*
 		 * These cannot be implemented on any machine that implements
@@ -579,6 +352,8 @@ int vt_ioctl(struct tty_struct *tty,
 		/*
 		 * KDADDIO and KDDELIO may be able to add ports beyond what
 		 * we reject here, but to be safe...
+		 *
+		 * These are locked internally via sys_ioperm
 		 */
 		if (arg < GPFIRST || arg > GPLAST) {
 			ret = -EINVAL;
@@ -601,7 +376,7 @@ int vt_ioctl(struct tty_struct *tty,
 		struct kbd_repeat kbrep;
 		
 		if (!capable(CAP_SYS_TTY_CONFIG))
-			goto eperm;
+			return -EPERM;
 
 		if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat))) {
 			ret =  -EFAULT;
@@ -625,7 +400,7 @@ int vt_ioctl(struct tty_struct *tty,
 		 * need to restore their engine state. --BenH
 		 */
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 		switch (arg) {
 		case KD_GRAPHICS:
 			break;
@@ -638,6 +413,7 @@ int vt_ioctl(struct tty_struct *tty,
 			ret = -EINVAL;
 			goto out;
 		}
+		/* FIXME: this needs the console lock extending */
 		if (vc->vc_mode == (unsigned char) arg)
 			break;
 		vc->vc_mode = (unsigned char) arg;
@@ -669,69 +445,26 @@ int vt_ioctl(struct tty_struct *tty,
 
 	case KDSKBMODE:
 		if (!perm)
-			goto eperm;
-		switch(arg) {
-		  case K_RAW:
-			kbd->kbdmode = VC_RAW;
-			break;
-		  case K_MEDIUMRAW:
-			kbd->kbdmode = VC_MEDIUMRAW;
-			break;
-		  case K_XLATE:
-			kbd->kbdmode = VC_XLATE;
-			compute_shiftstate();
-			break;
-		  case K_UNICODE:
-			kbd->kbdmode = VC_UNICODE;
-			compute_shiftstate();
-			break;
-		  case K_OFF:
-			kbd->kbdmode = VC_OFF;
-			break;
-		  default:
-			ret = -EINVAL;
-			goto out;
-		}
-		tty_ldisc_flush(tty);
+			return -EPERM;
+		ret = vt_do_kdskbmode(console, arg);
+		if (ret == 0)
+			tty_ldisc_flush(tty);
 		break;
 
 	case KDGKBMODE:
-		switch (kbd->kbdmode) {
-		case VC_RAW:
-			uival = K_RAW;
-			break;
-		case VC_MEDIUMRAW:
-			uival = K_MEDIUMRAW;
-			break;
-		case VC_UNICODE:
-			uival = K_UNICODE;
-			break;
-		case VC_OFF:
-			uival = K_OFF;
-			break;
-		default:
-			uival = K_XLATE;
-			break;
-		}
-		goto setint;
+		uival = vt_do_kdgkbmode(console);
+		ret = put_user(uival, (int __user *)arg);
+		break;
 
 	/* this could be folded into KDSKBMODE, but for compatibility
 	   reasons it is not so easy to fold KDGKBMETA into KDGKBMODE */
 	case KDSKBMETA:
-		switch(arg) {
-		  case K_METABIT:
-			clr_vc_kbd_mode(kbd, VC_META);
-			break;
-		  case K_ESCPREFIX:
-			set_vc_kbd_mode(kbd, VC_META);
-			break;
-		  default:
-			ret = -EINVAL;
-		}
+		ret = vt_do_kdskbmeta(console, arg);
 		break;
 
 	case KDGKBMETA:
-		uival = (vc_kbd_mode(kbd, VC_META) ? K_ESCPREFIX : K_METABIT);
+		/* FIXME: should review whether this is worth locking */
+		uival = vt_do_kdgkbmeta(console);
 	setint:
 		ret = put_user(uival, (int __user *)arg);
 		break;
@@ -740,133 +473,35 @@ int vt_ioctl(struct tty_struct *tty,
 	case KDSETKEYCODE:
 		if(!capable(CAP_SYS_TTY_CONFIG))
 			perm = 0;
-		ret = do_kbkeycode_ioctl(cmd, up, perm);
+		ret = vt_do_kbkeycode_ioctl(cmd, up, perm);
 		break;
 
 	case KDGKBENT:
 	case KDSKBENT:
-		ret = do_kdsk_ioctl(cmd, up, perm, kbd);
+		ret = vt_do_kdsk_ioctl(cmd, up, perm, console);
 		break;
 
 	case KDGKBSENT:
 	case KDSKBSENT:
-		ret = do_kdgkb_ioctl(cmd, up, perm);
+		ret = vt_do_kdgkb_ioctl(cmd, up, perm);
 		break;
 
+	/* Diacritical processing. Handled in keyboard.c as it has
+	   to operate on the keyboard locks and structures */
 	case KDGKBDIACR:
-	{
-		struct kbdiacrs __user *a = up;
-		struct kbdiacr diacr;
-		int i;
-
-		if (put_user(accent_table_size, &a->kb_cnt)) {
-			ret = -EFAULT;
-			break;
-		}
-		for (i = 0; i < accent_table_size; i++) {
-			diacr.diacr = conv_uni_to_8bit(accent_table[i].diacr);
-			diacr.base = conv_uni_to_8bit(accent_table[i].base);
-			diacr.result = conv_uni_to_8bit(accent_table[i].result);
-			if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr))) {
-				ret = -EFAULT;
-				break;
-			}
-		}
-		break;
-	}
 	case KDGKBDIACRUC:
-	{
-		struct kbdiacrsuc __user *a = up;
-
-		if (put_user(accent_table_size, &a->kb_cnt))
-			ret = -EFAULT;
-		else if (copy_to_user(a->kbdiacruc, accent_table,
-				accent_table_size*sizeof(struct kbdiacruc)))
-			ret = -EFAULT;
-		break;
-	}
-
 	case KDSKBDIACR:
-	{
-		struct kbdiacrs __user *a = up;
-		struct kbdiacr diacr;
-		unsigned int ct;
-		int i;
-
-		if (!perm)
-			goto eperm;
-		if (get_user(ct,&a->kb_cnt)) {
-			ret = -EFAULT;
-			break;
-		}
-		if (ct >= MAX_DIACR) {
-			ret = -EINVAL;
-			break;
-		}
-		accent_table_size = ct;
-		for (i = 0; i < ct; i++) {
-			if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr))) {
-				ret = -EFAULT;
-				break;
-			}
-			accent_table[i].diacr = conv_8bit_to_uni(diacr.diacr);
-			accent_table[i].base = conv_8bit_to_uni(diacr.base);
-			accent_table[i].result = conv_8bit_to_uni(diacr.result);
-		}
-		break;
-	}
-
 	case KDSKBDIACRUC:
-	{
-		struct kbdiacrsuc __user *a = up;
-		unsigned int ct;
-
-		if (!perm)
-			goto eperm;
-		if (get_user(ct,&a->kb_cnt)) {
-			ret = -EFAULT;
-			break;
-		}
-		if (ct >= MAX_DIACR) {
-			ret = -EINVAL;
-			break;
-		}
-		accent_table_size = ct;
-		if (copy_from_user(accent_table, a->kbdiacruc, ct*sizeof(struct kbdiacruc)))
-			ret = -EFAULT;
+		ret = vt_do_diacrit(cmd, up, perm);
 		break;
-	}
 
 	/* the ioctls below read/set the flags usually shown in the leds */
 	/* don't use them - they will go away without warning */
 	case KDGKBLED:
-		ucval = kbd->ledflagstate | (kbd->default_ledflagstate << 4);
-		goto setchar;
-
 	case KDSKBLED:
-		if (!perm)
-			goto eperm;
-		if (arg & ~0x77) {
-			ret = -EINVAL;
-			break;
-		}
-		kbd->ledflagstate = (arg & 7);
-		kbd->default_ledflagstate = ((arg >> 4) & 7);
-		set_leds();
-		break;
-
-	/* the ioctls below only set the lights, not the functions */
-	/* for those, see KDGKBLED and KDSKBLED above */
 	case KDGETLED:
-		ucval = getledstate();
-	setchar:
-		ret = put_user(ucval, (char __user *)arg);
-		break;
-
 	case KDSETLED:
-		if (!perm)
-			goto eperm;
-		setledstate(kbd, arg);
+		ret = vt_do_kdskled(console, cmd, arg, perm);
 		break;
 
 	/*
@@ -879,7 +514,7 @@ int vt_ioctl(struct tty_struct *tty,
 	case KDSIGACCEPT:
 	{
 		if (!perm || !capable(CAP_KILL))
-			goto eperm;
+			return -EPERM;
 		if (!valid_signal(arg) || arg < 1 || arg == SIGKILL)
 			ret = -EINVAL;
 		else {
@@ -897,7 +532,7 @@ int vt_ioctl(struct tty_struct *tty,
 		struct vt_mode tmp;
 
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 		if (copy_from_user(&tmp, up, sizeof(struct vt_mode))) {
 			ret = -EFAULT;
 			goto out;
@@ -943,6 +578,7 @@ int vt_ioctl(struct tty_struct *tty,
 		struct vt_stat __user *vtstat = up;
 		unsigned short state, mask;
 
+		/* Review: FIXME: Console lock ? */
 		if (put_user(fg_console + 1, &vtstat->v_active))
 			ret = -EFAULT;
 		else {
@@ -960,6 +596,7 @@ int vt_ioctl(struct tty_struct *tty,
 	 * Returns the first available (non-opened) console.
 	 */
 	case VT_OPENQRY:
+		/* FIXME: locking ? - but then this is a stupid API */
 		for (i = 0; i < MAX_NR_CONSOLES; ++i)
 			if (! VT_IS_IN_USE(i))
 				break;
@@ -973,7 +610,7 @@ int vt_ioctl(struct tty_struct *tty,
 	 */
 	case VT_ACTIVATE:
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 		if (arg == 0 || arg > MAX_NR_CONSOLES)
 			ret =  -ENXIO;
 		else {
@@ -992,7 +629,7 @@ int vt_ioctl(struct tty_struct *tty,
 		struct vt_setactivate vsa;
 
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 
 		if (copy_from_user(&vsa, (struct vt_setactivate __user *)arg,
 					sizeof(struct vt_setactivate))) {
@@ -1020,6 +657,7 @@ int vt_ioctl(struct tty_struct *tty,
 			if (ret)
 				break;
 			/* Commence switch and lock */
+			/* Review set_console locks */
 			set_console(vsa.console);
 		}
 		break;
@@ -1030,7 +668,7 @@ int vt_ioctl(struct tty_struct *tty,
 	 */
 	case VT_WAITACTIVE:
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 		if (arg == 0 || arg > MAX_NR_CONSOLES)
 			ret = -ENXIO;
 		else
@@ -1049,16 +687,17 @@ int vt_ioctl(struct tty_struct *tty,
 	 */
 	case VT_RELDISP:
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 
+		console_lock();
 		if (vc->vt_mode.mode != VT_PROCESS) {
+			console_unlock();
 			ret = -EINVAL;
 			break;
 		}
 		/*
 		 * Switching-from response
 		 */
-		console_lock();
 		if (vc->vt_newvt >= 0) {
 			if (arg == 0)
 				/*
@@ -1135,7 +774,7 @@ int vt_ioctl(struct tty_struct *tty,
 
 		ushort ll,cc;
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 		if (get_user(ll, &vtsizes->v_rows) ||
 		    get_user(cc, &vtsizes->v_cols))
 			ret = -EFAULT;
@@ -1146,6 +785,7 @@ int vt_ioctl(struct tty_struct *tty,
 
 				if (vc) {
 					vc->vc_resize_user = 1;
+					/* FIXME: review v tty lock */
 					vc_resize(vc_cons[i].d, cc, ll);
 				}
 			}
@@ -1159,7 +799,7 @@ int vt_ioctl(struct tty_struct *tty,
 		struct vt_consize __user *vtconsize = up;
 		ushort ll,cc,vlin,clin,vcol,ccol;
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 		if (!access_ok(VERIFY_READ, vtconsize,
 				sizeof(struct vt_consize))) {
 			ret = -EFAULT;
@@ -1215,7 +855,7 @@ int vt_ioctl(struct tty_struct *tty,
 
 	case PIO_FONT: {
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 		op.op = KD_FONT_OP_SET;
 		op.flags = KD_FONT_FLAG_OLD | KD_FONT_FLAG_DONT_RECALC;	/* Compatibility */
 		op.width = 8;
@@ -1256,7 +896,7 @@ int vt_ioctl(struct tty_struct *tty,
 	case PIO_FONTRESET:
 	{
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 
 #ifdef BROKEN_GRAPHICS_PROGRAMS
 		/* With BROKEN_GRAPHICS_PROGRAMS defined, the default
@@ -1282,7 +922,7 @@ int vt_ioctl(struct tty_struct *tty,
 			break;
 		}
 		if (!perm && op.op != KD_FONT_OP_GET)
-			goto eperm;
+			return -EPERM;
 		ret = con_font_op(vc, &op);
 		if (ret)
 			break;
@@ -1294,50 +934,65 @@ int vt_ioctl(struct tty_struct *tty,
 	case PIO_SCRNMAP:
 		if (!perm)
 			ret = -EPERM;
-		else
+		else {
+			tty_lock();
 			ret = con_set_trans_old(up);
+			tty_unlock();
+		}
 		break;
 
 	case GIO_SCRNMAP:
+		tty_lock();
 		ret = con_get_trans_old(up);
+		tty_unlock();
 		break;
 
 	case PIO_UNISCRNMAP:
 		if (!perm)
 			ret = -EPERM;
-		else
+		else {
+			tty_lock();
 			ret = con_set_trans_new(up);
+			tty_unlock();
+		}
 		break;
 
 	case GIO_UNISCRNMAP:
+		tty_lock();
 		ret = con_get_trans_new(up);
+		tty_unlock();
 		break;
 
 	case PIO_UNIMAPCLR:
 	      { struct unimapinit ui;
 		if (!perm)
-			goto eperm;
+			return -EPERM;
 		ret = copy_from_user(&ui, up, sizeof(struct unimapinit));
 		if (ret)
 			ret = -EFAULT;
-		else
+		else {
+			tty_lock();
 			con_clear_unimap(vc, &ui);
+			tty_unlock();
+		}
 		break;
 	      }
 
 	case PIO_UNIMAP:
 	case GIO_UNIMAP:
+		tty_lock();
 		ret = do_unimap_ioctl(cmd, up, perm, vc);
+		tty_unlock();
 		break;
 
 	case VT_LOCKSWITCH:
 		if (!capable(CAP_SYS_TTY_CONFIG))
-			goto eperm;
+			return -EPERM;
 		vt_dont_switch = 1;
 		break;
 	case VT_UNLOCKSWITCH:
 		if (!capable(CAP_SYS_TTY_CONFIG))
-			goto eperm;
+			return -EPERM;
 		vt_dont_switch = 0;
 		break;
 	case VT_GETHIFONTMASK:
@@ -1351,17 +1006,13 @@ int vt_ioctl(struct tty_struct *tty,
 		ret = -ENOIOCTLCMD;
 	}
 out:
-	tty_unlock();
 	return ret;
-eperm:
-	ret = -EPERM;
-	goto out;
 }
 
 void reset_vc(struct vc_data *vc)
 {
 	vc->vc_mode = KD_TEXT;
-	kbd_table[vc->vc_num].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
+	vt_reset_unicode(vc->vc_num);
 	vc->vt_mode.mode = VT_AUTO;
 	vc->vt_mode.waitv = 0;
 	vc->vt_mode.relsig = 0;
@@ -1384,6 +1035,7 @@ void vc_SAK(struct work_struct *work)
 	console_lock();
 	vc = vc_con->d;
 	if (vc) {
+		/* FIXME: review tty ref counting */
 		tty = vc->port.tty;
 		/*
 		 * SAK should also work in all raw modes and reset
@@ -1516,8 +1168,6 @@ long vt_compat_ioctl(struct tty_struct *tty,
 
 	console = vc->vc_num;
 
-	tty_lock();
-
 	if (!vc_cons_allocated(console)) { 	/* impossible? */
 		ret = -ENOIOCTLCMD;
 		goto out;
@@ -1546,7 +1196,9 @@ long vt_compat_ioctl(struct tty_struct *tty,
 
 	case PIO_UNIMAP:
 	case GIO_UNIMAP:
+		tty_lock();
 		ret = compat_unimap_ioctl(cmd, up, perm, vc);
+		tty_unlock();
 		break;
 
 	/*
@@ -1583,11 +1235,9 @@ long vt_compat_ioctl(struct tty_struct *tty,
 		goto fallback;
 	}
 out:
-	tty_unlock();
 	return ret;
 
 fallback:
-	tty_unlock();
 	return vt_ioctl(tty, cmd, arg);
 }
 
@@ -1773,13 +1423,10 @@ int vt_move_to_console(unsigned int vt, int alloc)
 		return -EIO;
 	}
 	console_unlock();
-	tty_lock();
 	if (vt_waitactive(vt + 1)) {
 		pr_debug("Suspend: Can't switch VCs.");
-		tty_unlock();
 		return -EINTR;
 	}
-	tty_unlock();
 	return prev;
 }