--- zzzz-none-000/linux-3.10.107/drivers/video/console/vgacon.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/video/console/vgacon.c	2021-02-04 17:41:59.000000000 +0000
@@ -42,6 +42,7 @@
 #include <linux/kd.h>
 #include <linux/slab.h>
 #include <linux/vt_kern.h>
+#include <linux/sched.h>
 #include <linux/selection.h>
 #include <linux/spinlock.h>
 #include <linux/ioport.h>
@@ -55,7 +56,7 @@
 static int cursor_size_lastto;
 static u32 vgacon_xres;
 static u32 vgacon_yres;
-static struct vgastate state;
+static struct vgastate vgastate;
 
 #define BLANK 0x0020
 
@@ -86,7 +87,8 @@
 static int vgacon_scroll(struct vc_data *c, int t, int b, int dir,
 			 int lines);
 static void vgacon_invert_region(struct vc_data *c, u16 * p, int count);
-static unsigned long vgacon_uni_pagedir[2];
+static struct uni_pagedir *vgacon_uni_pagedir;
+static int vgacon_refcount;
 
 /* Description of the hardware situation */
 static int		vga_init_done		__read_mostly;
@@ -398,7 +400,7 @@
 
 	vga_video_num_lines = screen_info.orig_video_lines;
 	vga_video_num_columns = screen_info.orig_video_cols;
-	state.vgabase = NULL;
+	vgastate.vgabase = NULL;
 
 	if (screen_info.orig_video_mode == 7) {
 		/* Monochrome display */
@@ -552,7 +554,7 @@
 
 static void vgacon_init(struct vc_data *c, int init)
 {
-	unsigned long p;
+	struct uni_pagedir *p;
 
 	/*
 	 * We cannot be loaded as a module, therefore init is always 1,
@@ -574,12 +576,12 @@
 	if (vga_512_chars)
 		c->vc_hi_font_mask = 0x0800;
 	p = *c->vc_uni_pagedir_loc;
-	if (c->vc_uni_pagedir_loc == &c->vc_uni_pagedir ||
-	    !--c->vc_uni_pagedir_loc[1])
+	if (c->vc_uni_pagedir_loc != &vgacon_uni_pagedir) {
 		con_free_unimap(c);
-	c->vc_uni_pagedir_loc = vgacon_uni_pagedir;
-	vgacon_uni_pagedir[1]++;
-	if (!vgacon_uni_pagedir[0] && p)
+		c->vc_uni_pagedir_loc = &vgacon_uni_pagedir;
+		vgacon_refcount++;
+	}
+	if (!vgacon_uni_pagedir && p)
 		con_set_default_unimap(c);
 
 	/* Only set the default if the user didn't deliberately override it */
@@ -596,7 +598,7 @@
 		vga_set_mem_top(c);
 	}
 
-	if (!--vgacon_uni_pagedir[1])
+	if (!--vgacon_refcount)
 		con_free_unimap(c);
 	c->vc_uni_pagedir_loc = &c->vc_uni_pagedir;
 	con_set_default_unimap(c);
@@ -849,12 +851,12 @@
 {
 	int i, j;
 
-	vga_w(state.vgabase, VGA_PEL_MSK, 0xff);
+	vga_w(vgastate.vgabase, VGA_PEL_MSK, 0xff);
 	for (i = j = 0; i < 16; i++) {
-		vga_w(state.vgabase, VGA_PEL_IW, table[i]);
-		vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2);
-		vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2);
-		vga_w(state.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2);
+		vga_w(vgastate.vgabase, VGA_PEL_IW, table[i]);
+		vga_w(vgastate.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2);
+		vga_w(vgastate.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2);
+		vga_w(vgastate.vgabase, VGA_PEL_D, vc->vc_palette[j++] >> 2);
 	}
 }
 
@@ -1006,7 +1008,7 @@
 	switch (blank) {
 	case 0:		/* Unblank */
 		if (vga_vesa_blanked) {
-			vga_vesa_unblank(&state);
+			vga_vesa_unblank(&vgastate);
 			vga_vesa_blanked = 0;
 		}
 		if (vga_palette_blanked) {
@@ -1020,7 +1022,7 @@
 	case 1:		/* Normal blanking */
 	case -1:	/* Obsolete */
 		if (!mode_switch && vga_video_type == VIDEO_TYPE_VGAC) {
-			vga_pal_blank(&state);
+			vga_pal_blank(&vgastate);
 			vga_palette_blanked = 1;
 			return 0;
 		}
@@ -1032,7 +1034,7 @@
 		return 1;
 	default:		/* VESA blanking */
 		if (vga_video_type == VIDEO_TYPE_VGAC) {
-			vga_vesa_blank(&state, blank - 1);
+			vga_vesa_blank(&vgastate, blank - 1);
 			vga_vesa_blanked = blank;
 		}
 		return 0;
@@ -1124,11 +1126,15 @@
 
 	if (arg) {
 		if (set)
-			for (i = 0; i < cmapsz; i++)
+			for (i = 0; i < cmapsz; i++) {
 				vga_writeb(arg[i], charmap + i);
+				cond_resched();
+			}
 		else
-			for (i = 0; i < cmapsz; i++)
+			for (i = 0; i < cmapsz; i++) {
 				arg[i] = vga_readb(charmap + i);
+				cond_resched();
+			}
 
 		/*
 		 * In 512-character mode, the character map is not contiguous if
@@ -1139,11 +1145,15 @@
 			charmap += 2 * cmapsz;
 			arg += cmapsz;
 			if (set)
-				for (i = 0; i < cmapsz; i++)
+				for (i = 0; i < cmapsz; i++) {
 					vga_writeb(arg[i], charmap + i);
+					cond_resched();
+				}
 			else
-				for (i = 0; i < cmapsz; i++)
+				for (i = 0; i < cmapsz; i++) {
 					arg[i] = vga_readb(charmap + i);
+					cond_resched();
+				}
 		}
 	}
 
@@ -1270,7 +1280,7 @@
 	    (charcount != 256 && charcount != 512))
 		return -EINVAL;
 
-	rc = vgacon_do_font_op(&state, font->data, 1, charcount == 512);
+	rc = vgacon_do_font_op(&vgastate, font->data, 1, charcount == 512);
 	if (rc)
 		return rc;
 
@@ -1289,7 +1299,7 @@
 	font->charcount = vga_512_chars ? 512 : 256;
 	if (!font->data)
 		return 0;
-	return vgacon_do_font_op(&state, font->data, 0, vga_512_chars);
+	return vgacon_do_font_op(&vgastate, font->data, 0, vga_512_chars);
 }
 
 #else
@@ -1431,5 +1441,6 @@
 	.con_build_attr = vgacon_build_attr,
 	.con_invert_region = vgacon_invert_region,
 };
+EXPORT_SYMBOL(vga_con);
 
 MODULE_LICENSE("GPL");