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Date: Sun, 30 Aug 2009 23:24:50 -0300
From: Mauro Carvalho Chehab <mchehab@...hat.com>
To: Brian Johnson <brijohn@...il.com>
Cc: Joe Perches <joe@...ches.com>,
Jean-Francois Moine <moinejf@...e.fr>,
linux-media@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sn9c20x: Reduce data usage, make functions static
Hi Brian,
Any news about the patch? It is always a good idea to try to reduce the kernel
size footprint.
Cheers,
Mauro.
Em Thu, 20 Aug 2009 19:08:58 -0700
Joe Perches <joe@...ches.com> escreveu:
> Compiled, not tested, no hardware
>
> Reduces size of object
>
> Use s16 instead of int where possible.
> Use struct instead of arrays
>
> Before:
> $ size drivers/media/video/gspca/sn9c20x.o
> text data bss dec hex filename
> 29346 1124 4128 34598 8726 drivers/media/video/gspca/sn9c20x.o
>
> After:
> $ size drivers/media/video/gspca/sn9c20x.o
> text data bss dec hex filename
> 25042 1124 4112 30278 7646 drivers/media/video/gspca/sn9c20x.o
>
> Signed-off-by: Joe Perches <joe@...ches.com>
> ---
> drivers/media/video/gspca/sn9c20x.c | 101 +++++++++++++++++++---------------
> 1 files changed, 56 insertions(+), 45 deletions(-)
>
> diff --git a/drivers/media/video/gspca/sn9c20x.c b/drivers/media/video/gspca/sn9c20x.c
> index fcfbbd3..8ddf738 100644
> --- a/drivers/media/video/gspca/sn9c20x.c
> +++ b/drivers/media/video/gspca/sn9c20x.c
> @@ -403,7 +403,7 @@ static const struct v4l2_pix_format sxga_mode[] = {
> .priv = 3 | MODE_RAW | MODE_SXGA},
> };
>
> -static const int hsv_red_x[] = {
> +static const s16 hsv_red_x[] = {
> 41, 44, 46, 48, 50, 52, 54, 56,
> 58, 60, 62, 64, 66, 68, 70, 72,
> 74, 76, 78, 80, 81, 83, 85, 87,
> @@ -451,7 +451,7 @@ static const int hsv_red_x[] = {
> 24, 26, 28, 30, 33, 35, 37, 39, 41
> };
>
> -static const int hsv_red_y[] = {
> +static const s16 hsv_red_y[] = {
> 82, 80, 78, 76, 74, 73, 71, 69,
> 67, 65, 63, 61, 58, 56, 54, 52,
> 50, 48, 46, 44, 41, 39, 37, 35,
> @@ -499,7 +499,7 @@ static const int hsv_red_y[] = {
> 96, 94, 92, 91, 89, 87, 85, 84, 82
> };
>
> -static const int hsv_green_x[] = {
> +static const s16 hsv_green_x[] = {
> -124, -124, -125, -125, -125, -125, -125, -125,
> -125, -126, -126, -125, -125, -125, -125, -125,
> -125, -124, -124, -124, -123, -123, -122, -122,
> @@ -547,7 +547,7 @@ static const int hsv_green_x[] = {
> -120, -120, -121, -122, -122, -123, -123, -124, -124
> };
>
> -static const int hsv_green_y[] = {
> +static const s16 hsv_green_y[] = {
> -100, -99, -98, -97, -95, -94, -93, -91,
> -90, -89, -87, -86, -84, -83, -81, -80,
> -78, -76, -75, -73, -71, -70, -68, -66,
> @@ -595,7 +595,7 @@ static const int hsv_green_y[] = {
> -109, -108, -107, -106, -105, -104, -103, -102, -100
> };
>
> -static const int hsv_blue_x[] = {
> +static const s16 hsv_blue_x[] = {
> 112, 113, 114, 114, 115, 116, 117, 117,
> 118, 118, 119, 119, 120, 120, 120, 121,
> 121, 121, 122, 122, 122, 122, 122, 122,
> @@ -643,7 +643,7 @@ static const int hsv_blue_x[] = {
> 104, 105, 106, 107, 108, 109, 110, 111, 112
> };
>
> -static const int hsv_blue_y[] = {
> +static const s16 hsv_blue_y[] = {
> -11, -13, -15, -17, -19, -21, -23, -25,
> -27, -29, -31, -33, -35, -37, -39, -41,
> -43, -45, -46, -48, -50, -52, -54, -55,
> @@ -792,7 +792,17 @@ static u8 hv7131r_gain[] = {
> 0x78 /* 8x */
> };
>
> -static u8 soi968_init[][2] = {
> +struct i2c_reg_u8 {
> + u8 reg;
> + u8 val;
> +};
> +
> +struct i2c_reg_u16 {
> + u8 reg;
> + u16 val;
> +};
> +
> +static struct i2c_reg_u8 soi968_init[] = {
> {0x12, 0x80}, {0x0c, 0x00}, {0x0f, 0x1f},
> {0x11, 0x80}, {0x38, 0x52}, {0x1e, 0x00},
> {0x33, 0x08}, {0x35, 0x8c}, {0x36, 0x0c},
> @@ -806,7 +816,7 @@ static u8 soi968_init[][2] = {
> {0x00, 0x00}, {0x01, 0x80}, {0x02, 0x80},
> };
>
> -static u8 ov7660_init[][2] = {
> +static struct i2c_reg_u8 ov7660_init[] = {
> {0x0e, 0x80}, {0x0d, 0x08}, {0x0f, 0xc3},
> {0x04, 0xc3}, {0x10, 0x40}, {0x11, 0x40},
> {0x12, 0x05}, {0x13, 0xba}, {0x14, 0x2a},
> @@ -815,7 +825,7 @@ static u8 ov7660_init[][2] = {
> {0x2e, 0x0b}, {0x01, 0x78}, {0x02, 0x50},
> };
>
> -static u8 ov7670_init[][2] = {
> +static struct i2c_reg_u8 ov7670_init[] = {
> {0x12, 0x80}, {0x11, 0x80}, {0x3a, 0x04}, {0x12, 0x01},
> {0x32, 0xb6}, {0x03, 0x0a}, {0x0c, 0x00}, {0x3e, 0x00},
> {0x70, 0x3a}, {0x71, 0x35}, {0x72, 0x11}, {0x73, 0xf0},
> @@ -872,7 +882,7 @@ static u8 ov7670_init[][2] = {
> {0x93, 0x00},
> };
>
> -static u8 ov9650_init[][2] = {
> +static struct i2c_reg_u8 ov9650_init[] = {
> {0x12, 0x80}, {0x00, 0x00}, {0x01, 0x78},
> {0x02, 0x78}, {0x03, 0x36}, {0x04, 0x03},
> {0x05, 0x00}, {0x06, 0x00}, {0x08, 0x00},
> @@ -902,7 +912,7 @@ static u8 ov9650_init[][2] = {
> {0xaa, 0x92}, {0xab, 0x0a},
> };
>
> -static u8 ov9655_init[][2] = {
> +static struct i2c_reg_u8 ov9655_init[] = {
> {0x12, 0x80}, {0x12, 0x01}, {0x0d, 0x00}, {0x0e, 0x61},
> {0x11, 0x80}, {0x13, 0xba}, {0x14, 0x2e}, {0x16, 0x24},
> {0x1e, 0x04}, {0x1e, 0x04}, {0x1e, 0x04}, {0x27, 0x08},
> @@ -939,7 +949,7 @@ static u8 ov9655_init[][2] = {
> {0x00, 0x03}, {0x00, 0x0a}, {0x00, 0x10}, {0x00, 0x13},
> };
>
> -static u16 mt9v112_init[][2] = {
> +static struct i2c_reg_u16 mt9v112_init[] = {
> {0xf0, 0x0000}, {0x0d, 0x0021}, {0x0d, 0x0020},
> {0x34, 0xc019}, {0x0a, 0x0011}, {0x0b, 0x000b},
> {0x20, 0x0703}, {0x35, 0x2022}, {0xf0, 0x0001},
> @@ -958,7 +968,7 @@ static u16 mt9v112_init[][2] = {
> {0x2c, 0x00ae}, {0x2d, 0x00ae}, {0x2e, 0x00ae},
> };
>
> -static u16 mt9v111_init[][2] = {
> +static struct i2c_reg_u16 mt9v111_init[] = {
> {0x01, 0x0004}, {0x0d, 0x0001}, {0x0d, 0x0000},
> {0x01, 0x0001}, {0x02, 0x0016}, {0x03, 0x01e1},
> {0x04, 0x0281}, {0x05, 0x0004}, {0x07, 0x3002},
> @@ -985,7 +995,7 @@ static u16 mt9v111_init[][2] = {
> {0x0e, 0x0008}, {0x06, 0x002d}, {0x05, 0x0004},
> };
>
> -static u16 mt9v011_init[][2] = {
> +static struct i2c_reg_u16 mt9v011_init[] = {
> {0x07, 0x0002}, {0x0d, 0x0001}, {0x0d, 0x0000},
> {0x01, 0x0008}, {0x02, 0x0016}, {0x03, 0x01e1},
> {0x04, 0x0281}, {0x05, 0x0083}, {0x06, 0x0006},
> @@ -1012,7 +1022,7 @@ static u16 mt9v011_init[][2] = {
> {0x06, 0x0029}, {0x05, 0x0009},
> };
>
> -static u16 mt9m001_init[][2] = {
> +static struct i2c_reg_u16 mt9m001_init[] = {
> {0x0d, 0x0001}, {0x0d, 0x0000}, {0x01, 0x000e},
> {0x02, 0x0014}, {0x03, 0x03c1}, {0x04, 0x0501},
> {0x05, 0x0083}, {0x06, 0x0006}, {0x0d, 0x0002},
> @@ -1025,14 +1035,14 @@ static u16 mt9m001_init[][2] = {
> {0x2e, 0x0029}, {0x07, 0x0002},
> };
>
> -static u16 mt9m111_init[][2] = {
> +static struct i2c_reg_u16 mt9m111_init[] = {
> {0xf0, 0x0000}, {0x0d, 0x0008}, {0x0d, 0x0009},
> {0x0d, 0x0008}, {0xf0, 0x0001}, {0x3a, 0x4300},
> {0x9b, 0x4300}, {0xa1, 0x0280}, {0xa4, 0x0200},
> {0x06, 0x308e}, {0xf0, 0x0000},
> };
>
> -static u8 hv7131r_init[][2] = {
> +static struct i2c_reg_u8 hv7131r_init[] = {
> {0x02, 0x08}, {0x02, 0x00}, {0x01, 0x08},
> {0x02, 0x00}, {0x20, 0x00}, {0x21, 0xd0},
> {0x22, 0x00}, {0x23, 0x09}, {0x01, 0x08},
> @@ -1043,7 +1053,7 @@ static u8 hv7131r_init[][2] = {
> {0x23, 0x09}, {0x01, 0x08},
> };
>
> -int reg_r(struct gspca_dev *gspca_dev, u16 reg, u16 length)
> +static int reg_r(struct gspca_dev *gspca_dev, u16 reg, u16 length)
> {
> struct usb_device *dev = gspca_dev->dev;
> int result;
> @@ -1062,7 +1072,8 @@ int reg_r(struct gspca_dev *gspca_dev, u16 reg, u16 length)
> return 0;
> }
>
> -int reg_w(struct gspca_dev *gspca_dev, u16 reg, const u8 *buffer, int length)
> +static int reg_w(struct gspca_dev *gspca_dev, u16 reg,
> + const u8 *buffer, int length)
> {
> struct usb_device *dev = gspca_dev->dev;
> int result;
> @@ -1082,13 +1093,13 @@ int reg_w(struct gspca_dev *gspca_dev, u16 reg, const u8 *buffer, int length)
> return 0;
> }
>
> -int reg_w1(struct gspca_dev *gspca_dev, u16 reg, const u8 value)
> +static int reg_w1(struct gspca_dev *gspca_dev, u16 reg, const u8 value)
> {
> u8 data[1] = {value};
> return reg_w(gspca_dev, reg, data, 1);
> }
>
> -int i2c_w(struct gspca_dev *gspca_dev, const u8 *buffer)
> +static int i2c_w(struct gspca_dev *gspca_dev, const u8 *buffer)
> {
> int i;
> reg_w(gspca_dev, 0x10c0, buffer, 8);
> @@ -1104,7 +1115,7 @@ int i2c_w(struct gspca_dev *gspca_dev, const u8 *buffer)
> return -1;
> }
>
> -int i2c_w1(struct gspca_dev *gspca_dev, u8 reg, u8 val)
> +static int i2c_w1(struct gspca_dev *gspca_dev, u8 reg, u8 val)
> {
> struct sd *sd = (struct sd *) gspca_dev;
>
> @@ -1126,7 +1137,7 @@ int i2c_w1(struct gspca_dev *gspca_dev, u8 reg, u8 val)
> return i2c_w(gspca_dev, row);
> }
>
> -int i2c_w2(struct gspca_dev *gspca_dev, u8 reg, u16 val)
> +static int i2c_w2(struct gspca_dev *gspca_dev, u8 reg, u16 val)
> {
> struct sd *sd = (struct sd *) gspca_dev;
> u8 row[8];
> @@ -1201,8 +1212,8 @@ static int ov9650_init_sensor(struct gspca_dev *gspca_dev)
> struct sd *sd = (struct sd *) gspca_dev;
>
> for (i = 0; i < ARRAY_SIZE(ov9650_init); i++) {
> - if (i2c_w1(gspca_dev, ov9650_init[i][0],
> - ov9650_init[i][1]) < 0) {
> + if (i2c_w1(gspca_dev, ov9650_init[i].reg,
> + ov9650_init[i].val) < 0) {
> err("OV9650 sensor initialization failed");
> return -ENODEV;
> }
> @@ -1218,8 +1229,8 @@ static int ov9655_init_sensor(struct gspca_dev *gspca_dev)
> struct sd *sd = (struct sd *) gspca_dev;
>
> for (i = 0; i < ARRAY_SIZE(ov9655_init); i++) {
> - if (i2c_w1(gspca_dev, ov9655_init[i][0],
> - ov9655_init[i][1]) < 0) {
> + if (i2c_w1(gspca_dev, ov9655_init[i].reg,
> + ov9655_init[i].val) < 0) {
> err("OV9655 sensor initialization failed");
> return -ENODEV;
> }
> @@ -1237,8 +1248,8 @@ static int soi968_init_sensor(struct gspca_dev *gspca_dev)
> struct sd *sd = (struct sd *) gspca_dev;
>
> for (i = 0; i < ARRAY_SIZE(soi968_init); i++) {
> - if (i2c_w1(gspca_dev, soi968_init[i][0],
> - soi968_init[i][1]) < 0) {
> + if (i2c_w1(gspca_dev, soi968_init[i].reg,
> + soi968_init[i].val) < 0) {
> err("SOI968 sensor initialization failed");
> return -ENODEV;
> }
> @@ -1256,8 +1267,8 @@ static int ov7660_init_sensor(struct gspca_dev *gspca_dev)
> struct sd *sd = (struct sd *) gspca_dev;
>
> for (i = 0; i < ARRAY_SIZE(ov7660_init); i++) {
> - if (i2c_w1(gspca_dev, ov7660_init[i][0],
> - ov7660_init[i][1]) < 0) {
> + if (i2c_w1(gspca_dev, ov7660_init[i].reg,
> + ov7660_init[i].val) < 0) {
> err("OV7660 sensor initialization failed");
> return -ENODEV;
> }
> @@ -1275,8 +1286,8 @@ static int ov7670_init_sensor(struct gspca_dev *gspca_dev)
> struct sd *sd = (struct sd *) gspca_dev;
>
> for (i = 0; i < ARRAY_SIZE(ov7670_init); i++) {
> - if (i2c_w1(gspca_dev, ov7670_init[i][0],
> - ov7670_init[i][1]) < 0) {
> + if (i2c_w1(gspca_dev, ov7670_init[i].reg,
> + ov7670_init[i].val) < 0) {
> err("OV7670 sensor initialization failed");
> return -ENODEV;
> }
> @@ -1299,8 +1310,8 @@ static int mt9v_init_sensor(struct gspca_dev *gspca_dev)
> ret = i2c_r2(gspca_dev, 0xff, &value);
> if ((ret == 0) && (value == 0x8243)) {
> for (i = 0; i < ARRAY_SIZE(mt9v011_init); i++) {
> - if (i2c_w2(gspca_dev, mt9v011_init[i][0],
> - mt9v011_init[i][1]) < 0) {
> + if (i2c_w2(gspca_dev, mt9v011_init[i].reg,
> + mt9v011_init[i].val) < 0) {
> err("MT9V011 sensor initialization failed");
> return -ENODEV;
> }
> @@ -1317,8 +1328,8 @@ static int mt9v_init_sensor(struct gspca_dev *gspca_dev)
> ret = i2c_r2(gspca_dev, 0xff, &value);
> if ((ret == 0) && (value == 0x823a)) {
> for (i = 0; i < ARRAY_SIZE(mt9v111_init); i++) {
> - if (i2c_w2(gspca_dev, mt9v111_init[i][0],
> - mt9v111_init[i][1]) < 0) {
> + if (i2c_w2(gspca_dev, mt9v111_init[i].reg,
> + mt9v111_init[i].val) < 0) {
> err("MT9V111 sensor initialization failed");
> return -ENODEV;
> }
> @@ -1339,8 +1350,8 @@ static int mt9v_init_sensor(struct gspca_dev *gspca_dev)
> ret = i2c_r2(gspca_dev, 0x00, &value);
> if ((ret == 0) && (value == 0x1229)) {
> for (i = 0; i < ARRAY_SIZE(mt9v112_init); i++) {
> - if (i2c_w2(gspca_dev, mt9v112_init[i][0],
> - mt9v112_init[i][1]) < 0) {
> + if (i2c_w2(gspca_dev, mt9v112_init[i].reg,
> + mt9v112_init[i].val) < 0) {
> err("MT9V112 sensor initialization failed");
> return -ENODEV;
> }
> @@ -1360,8 +1371,8 @@ static int mt9m111_init_sensor(struct gspca_dev *gspca_dev)
> struct sd *sd = (struct sd *) gspca_dev;
> int i;
> for (i = 0; i < ARRAY_SIZE(mt9m111_init); i++) {
> - if (i2c_w2(gspca_dev, mt9m111_init[i][0],
> - mt9m111_init[i][1]) < 0) {
> + if (i2c_w2(gspca_dev, mt9m111_init[i].reg,
> + mt9m111_init[i].val) < 0) {
> err("MT9M111 sensor initialization failed");
> return -ENODEV;
> }
> @@ -1376,8 +1387,8 @@ static int mt9m001_init_sensor(struct gspca_dev *gspca_dev)
> struct sd *sd = (struct sd *) gspca_dev;
> int i;
> for (i = 0; i < ARRAY_SIZE(mt9m001_init); i++) {
> - if (i2c_w2(gspca_dev, mt9m001_init[i][0],
> - mt9m001_init[i][1]) < 0) {
> + if (i2c_w2(gspca_dev, mt9m001_init[i].reg,
> + mt9m001_init[i].val) < 0) {
> err("MT9M001 sensor initialization failed");
> return -ENODEV;
> }
> @@ -1395,8 +1406,8 @@ static int hv7131r_init_sensor(struct gspca_dev *gspca_dev)
> struct sd *sd = (struct sd *) gspca_dev;
>
> for (i = 0; i < ARRAY_SIZE(hv7131r_init); i++) {
> - if (i2c_w1(gspca_dev, hv7131r_init[i][0],
> - hv7131r_init[i][1]) < 0) {
> + if (i2c_w1(gspca_dev, hv7131r_init[i].reg,
> + hv7131r_init[i].val) < 0) {
> err("HV7131R Sensor initialization failed");
> return -ENODEV;
> }
--
Cheers,
Mauro
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