diff --git a/drivers/staging/xgifb/vb_setmode.c b/drivers/staging/xgifb/vb_setmode.c
index fb14f8d3479e..76d3fe1cb57a 100644
--- a/drivers/staging/xgifb/vb_setmode.c
+++ b/drivers/staging/xgifb/vb_setmode.c
@@ -3929,7 +3929,7 @@ static void XGI_SetGroup2(unsigned short ModeNo, unsigned short ModeIdIndex,
 {
 	unsigned short i, j, tempax, tempbx, tempcx, temp, push1, push2,
 			modeflag, resinfo, crt2crtc;
-	unsigned char *TimingPoint;
+	unsigned char const *TimingPoint;
 
 	unsigned long longtemp, tempeax, tempebx, temp2, tempecx;
 
@@ -4649,7 +4649,7 @@ static void XGI_SetGroup3(unsigned short ModeNo, unsigned short ModeIdIndex,
 		struct vb_device_info *pVBInfo)
 {
 	unsigned short i;
-	unsigned char *tempdi;
+	unsigned char const *tempdi;
 	unsigned short modeflag;
 
 	/* si+Ext_ResInfo */
diff --git a/drivers/staging/xgifb/vb_table.h b/drivers/staging/xgifb/vb_table.h
index fd623f0cb1f2..4f45d03bdbf8 100644
--- a/drivers/staging/xgifb/vb_table.h
+++ b/drivers/staging/xgifb/vb_table.h
@@ -1013,7 +1013,7 @@ static const struct SiS_TVData XGI_StYPbPr750pData[] = {
 	{1, 1, 1650, 750, 1280, 480,  0, 0, 760},
 };
 
-static unsigned char XGI330_NTSCTiming[] = {
+static const unsigned char XGI330_NTSCTiming[] = {
 	0x17, 0x1d, 0x03, 0x09, 0x05, 0x06, 0x0c, 0x0c,
 	0x94, 0x49, 0x01, 0x0a, 0x06, 0x0d, 0x04, 0x0a,
 	0x06, 0x14, 0x0d, 0x04, 0x0a, 0x00, 0x85, 0x1b,
@@ -1024,7 +1024,7 @@ static unsigned char XGI330_NTSCTiming[] = {
 	0x00, 0x40, 0x44, 0x00, 0xdb, 0x02, 0x3b, 0x00
 };
 
-static unsigned char XGI330_PALTiming[] = {
+static const unsigned char XGI330_PALTiming[] = {
 	0x21, 0x5A, 0x35, 0x6e, 0x04, 0x38, 0x3d, 0x70,
 	0x94, 0x49, 0x01, 0x12, 0x06, 0x3e, 0x35, 0x6d,
 	0x06, 0x14, 0x3e, 0x35, 0x6d, 0x00, 0x45, 0x2b,
@@ -1035,7 +1035,7 @@ static unsigned char XGI330_PALTiming[] = {
 	0x00, 0x40, 0x3e, 0x00, 0xe1, 0x02, 0x28, 0x00
 };
 
-static unsigned char XGI330_HiTVExtTiming[] = {
+static const unsigned char XGI330_HiTVExtTiming[] = {
 	0x2D, 0x60, 0x2C, 0x5F, 0x08, 0x31, 0x3A, 0x64,
 	0x28, 0x02, 0x01, 0x3D, 0x06, 0x3E, 0x35, 0x6D,
 	0x06, 0x14, 0x3E, 0x35, 0x6D, 0x00, 0xC5, 0x3F,
@@ -1047,7 +1047,7 @@ static unsigned char XGI330_HiTVExtTiming[] = {
 	0x27, 0x00, 0xfc, 0xff, 0x6a, 0x00
 };
 
-static unsigned char XGI330_HiTVSt1Timing[] = {
+static const unsigned char XGI330_HiTVSt1Timing[] = {
 	0x32, 0x65, 0x2C, 0x5F, 0x08, 0x31, 0x3A, 0x65,
 	0x28, 0x02, 0x01, 0x3D, 0x06, 0x3E, 0x35, 0x6D,
 	0x06, 0x14, 0x3E, 0x35, 0x6D, 0x00, 0xC5, 0x3F,
@@ -1059,7 +1059,7 @@ static unsigned char XGI330_HiTVSt1Timing[] = {
 	0x0E, 0x00, 0xfc, 0xff, 0x2d, 0x00
 };
 
-static unsigned char XGI330_HiTVSt2Timing[] = {
+static const unsigned char XGI330_HiTVSt2Timing[] = {
 	0x32, 0x65, 0x2C, 0x5F, 0x08, 0x31, 0x3A, 0x64,
 	0x28, 0x02, 0x01, 0x3D, 0x06, 0x3E, 0x35, 0x6D,
 	0x06, 0x14, 0x3E, 0x35, 0x6D, 0x00, 0xC5, 0x3F,
@@ -1071,7 +1071,7 @@ static unsigned char XGI330_HiTVSt2Timing[] = {
 	0x27, 0x00, 0xFC, 0xff, 0x6a, 0x00
 };
 
-static unsigned char XGI330_HiTVTextTiming[] = {
+static const unsigned char XGI330_HiTVTextTiming[] = {
 	0x32, 0x65, 0x2C, 0x5F, 0x08, 0x31, 0x3A, 0x65,
 	0x28, 0x02, 0x01, 0x3D, 0x06, 0x3E, 0x35, 0x6D,
 	0x06, 0x14, 0x3E, 0x35, 0x6D, 0x00, 0xC5, 0x3F,
@@ -1083,7 +1083,7 @@ static unsigned char XGI330_HiTVTextTiming[] = {
 	0x11, 0x00, 0xFC, 0xFF, 0x32, 0x00
 };
 
-static unsigned char XGI330_YPbPr750pTiming[] = {
+static const unsigned char XGI330_YPbPr750pTiming[] = {
 	0x30, 0x1d, 0xe8, 0x09, 0x09, 0xed, 0x0c, 0x0c,
 	0x98, 0x0a, 0x01, 0x0c, 0x06, 0x0d, 0x04, 0x0a,
 	0x06, 0x14, 0x0d, 0x04, 0x0a, 0x00, 0x85, 0x3f,
@@ -1095,7 +1095,7 @@ static unsigned char XGI330_YPbPr750pTiming[] = {
 	0x11, 0x00, 0xfc, 0xff, 0x32, 0x00
 };
 
-static unsigned char XGI330_YPbPr525pTiming[] = {
+static const unsigned char XGI330_YPbPr525pTiming[] = {
 	0x3E, 0x11, 0x06, 0x09, 0x0b, 0x0c, 0x0c, 0x0c,
 	0x98, 0x0a, 0x01, 0x0d, 0x06, 0x0d, 0x04, 0x0a,
 	0x06, 0x14, 0x0d, 0x04, 0x0a, 0x00, 0x85, 0x3f,
@@ -1107,7 +1107,7 @@ static unsigned char XGI330_YPbPr525pTiming[] = {
 	0x11, 0x00, 0xFC, 0xFF, 0x32, 0x00
 };
 
-static unsigned char XGI330_YPbPr525iTiming[] = {
+static const unsigned char XGI330_YPbPr525iTiming[] = {
 	0x1B, 0x21, 0x03, 0x09, 0x05, 0x06, 0x0C, 0x0C,
 	0x94, 0x49, 0x01, 0x0A, 0x06, 0x0D, 0x04, 0x0A,
 	0x06, 0x14, 0x0D, 0x04, 0x0A, 0x00, 0x85, 0x1B,
@@ -1119,7 +1119,7 @@ static unsigned char XGI330_YPbPr525iTiming[] = {
 	0x44, 0x00, 0xDB, 0x02, 0x3B, 0x00
 };
 
-static unsigned char XGI330_HiTVGroup3Data[] = {
+static const unsigned char XGI330_HiTVGroup3Data[] = {
 	0x00, 0x1A, 0x22, 0x63, 0x62, 0x22, 0x08, 0x5F,
 	0x05, 0x21, 0xB2, 0xB2, 0x55, 0x77, 0x2A, 0xA6,
 	0x25, 0x2F, 0x47, 0xFA, 0xC8, 0xFF, 0x8E, 0x20,
@@ -1130,7 +1130,7 @@ static unsigned char XGI330_HiTVGroup3Data[] = {
 	0x18, 0x05, 0x18, 0x05, 0x4C, 0xA8, 0x01
 };
 
-static unsigned char XGI330_HiTVGroup3Simu[] = {
+static const unsigned char XGI330_HiTVGroup3Simu[] = {
 	0x00, 0x1A, 0x22, 0x63, 0x62, 0x22, 0x08, 0x95,
 	0xDB, 0x20, 0xB8, 0xB8, 0x55, 0x47, 0x2A, 0xA6,
 	0x25, 0x2F, 0x47, 0xFA, 0xC8, 0xFF, 0x8E, 0x20,
@@ -1141,7 +1141,7 @@ static unsigned char XGI330_HiTVGroup3Simu[] = {
 	0x18, 0x05, 0x18, 0x05, 0x4C, 0xA8, 0x01
 };
 
-static unsigned char XGI330_HiTVGroup3Text[] = {
+static const unsigned char XGI330_HiTVGroup3Text[] = {
 	0x00, 0x1A, 0x22, 0x63, 0x62, 0x22, 0x08, 0xA7,
 	0xF5, 0x20, 0xCE, 0xCE, 0x55, 0x47, 0x2A, 0xA6,
 	0x25, 0x2F, 0x47, 0xFA, 0xC8, 0xFF, 0x8E, 0x20,
@@ -1152,7 +1152,7 @@ static unsigned char XGI330_HiTVGroup3Text[] = {
 	0x18, 0x05, 0x18, 0x05, 0x4C, 0xA8, 0x01
 };
 
-static unsigned char XGI330_Ren525pGroup3[] = {
+static const unsigned char XGI330_Ren525pGroup3[] = {
 	0x00, 0x14, 0x15, 0x25, 0x55, 0x15, 0x0b, 0x13,
 	0xB1, 0x41, 0x62, 0x62, 0xFF, 0xF4, 0x45, 0xa6,
 	0x25, 0x2F, 0x67, 0xF6, 0xbf, 0xFF, 0x8E, 0x20,
@@ -1163,7 +1163,7 @@ static unsigned char XGI330_Ren525pGroup3[] = {
 	0x1a, 0x1F, 0x25, 0x2a, 0x4C, 0xAA, 0x01
 };
 
-static unsigned char XGI330_Ren750pGroup3[] = {
+static const unsigned char XGI330_Ren750pGroup3[] = {
 	0x00, 0x14, 0x15, 0x25, 0x55, 0x15, 0x0b, 0x7a,
 	0x54, 0x41, 0xE7, 0xE7, 0xFF, 0xF4, 0x45, 0xa6,
 	0x25, 0x2F, 0x67, 0xF6, 0xbf, 0xFF, 0x8E, 0x20,