drivers/video/fbdev/dnfb.c:159:16: sparse: sparse: cast removes address space '__iomem' of expression

From: kernel test robot
Date: Thu Jul 23 2020 - 21:19:24 EST

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tree: config: m68k-randconfig-s032-20200723 compiler: m68k-linux-gcc (GCC) reproduce:
wget # apt-get install sparse
# sparse version: v0.6.2-93- git checkout 670d0a4b1070466 # save the attached COMPILER_INSTALL_PATH=$HOME/0day
If you fix the issue, kindly Reported-by: kernel test robot

sparse warnings: (new ones
>> drivers/video/fbdev/dnfb.c:159:16: >> drivers/video/fbdev/dnfb.c:243:27: >> drivers/video/fbdev/dnfb.c:243:27: drivers/video/fbdev/dnfb.c:243:27: sparse: drivers/video/fbdev/dnfb.c:283:12: --
drivers/w1/slaves/w1_ds28e04.c:342:13: drivers/w1/slaves/w1_ds28e04.c:342:13: drivers/w1/slaves/w1_ds28e04.c:342:13: >> drivers/w1/slaves/w1_ds2 >> drivers/w1/slaves/w1_ds2 drivers/w1/slaves/w1_ds28e04.c:342:13: drivers/w1/slaves/w1_ds28e04.c:356:13: drivers/w1/slaves/w1_ds28e04.c:356:13: drivers/w1/slaves/w1_ds28e04.c:356:13: >> drivers/w1/slaves/w1_ds2 >> drivers/w1/slaves/w1_ds2 drivers/w1/slaves/w1_ds28e04.c:356:13:
vim +/__iomem +159 drivers/video/fbd
^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c 48c68c4f1b54244 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c 6b04e9f2564a609 drivers/video/fbdev/dnfb.c 6b04e9f2564a609 drivers/video/fbdev/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c 6b04e9f2564a609 drivers/video/fbdev/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c 3ae5eaec1d2d9c0 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c 6b04e9f2564a609 drivers/video/fbdev/dnfb.c 6b04e9f2564a609 drivers/video/fbdev/dnfb.c 6b04e9f2564a609 drivers/video/fbdev/dnfb.c 6b04e9f2564a609 drivers/video/fbdev/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c
:::::: The code at line 159 :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
:::::: TO: Linus Torvalds <torval :::::: CC: Linus Torvalds <torval
---
0-DAY CI Kernel Test Service, Description: application/gzip Chao Yu: "Re: [f2fs-dev] [PATCH] f2fs: fix use-after-free issue" Yue Hu: "[PATCH] panic: make print_oops_end_marker() static" by: [ date ] [ thread ] [ subject ] [ author ] href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
02fd90fe7ac7
sparse: use identifiers to define address spaces
(attached as .config)
9.3.0
href="https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross">https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
g4c6cbe55-dirty
7765f7d18f7592993d02783aa
.config to linux build tree
COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=m68k
add following tag as appropriate
<lkp@xxxxxxxxx>
prefixed by >>)
sparse: sparse: cast removes address space '__iomem' of expression
sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __iomem *screen_base @@ got unsigned char [usertype] * @@
sparse: expected char [noderef] __iomem *screen_base
got unsigned char [usertype] *
sparse: sparse: symbol 'dnfb_init' was not declared. Should it be static?
sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user * @@ got char *buf @@
sparse: expected void const volatile [noderef] __user *
sparse: got char *buf
8e04.c:342:13: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __user *__pu_ptr @@ got char *buf @@
8e04.c:342:13: sparse: expected void const [noderef] __user *__pu_ptr
sparse: got char *buf
sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user * @@ got char const *buf @@
sparse: expected void const volatile [noderef] __user *
sparse: got char const *buf
8e04.c:356:13: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __user *__gu_ptr @@ got char const *buf @@
8e04.c:356:13: sparse: expected void const [noderef] __user *__gu_ptr
sparse: got char const *buf
ev/dnfb.c
Linus Torvalds 2005-04-16 151
Linus Torvalds 2005-04-16 152 int incr, y_delta, pre_read = 0, x_end, x_word_count;
Linus Torvalds 2005-04-16 153 uint start_mask, end_mask, dest;
Linus Torvalds 2005-04-16 154 ushort *src, dummy;
Linus Torvalds 2005-04-16 155 short i, j;
Linus Torvalds 2005-04-16 156
Linus Torvalds 2005-04-16 157 incr = (area->dy <= area->sy) ? 1 : -1;
Linus Torvalds 2005-04-16 158
Linus Torvalds 2005-04-16 @159 src = (ushort *)(info->screen_base + area->sy * info->fix.line_length +
Linus Torvalds 2005-04-16 160 (area->sx >> 4));
Linus Torvalds 2005-04-16 161 dest = area->dy * (info->fix.line_length >> 1) + (area->dx >> 4);
Linus Torvalds 2005-04-16 162
Linus Torvalds 2005-04-16 163 if (incr > 0) {
Linus Torvalds 2005-04-16 164 y_delta = (info->fix.line_length * 8) - area->sx - area->width;
Linus Torvalds 2005-04-16 165 x_end = area->dx + area->width - 1;
Linus Torvalds 2005-04-16 166 x_word_count = (x_end >> 4) - (area->dx >> 4) + 1;
Linus Torvalds 2005-04-16 167 start_mask = 0xffff0000 >> (area->dx & 0xf);
Linus Torvalds 2005-04-16 168 end_mask = 0x7ffff >> (x_end & 0xf);
Linus Torvalds 2005-04-16 169 out_8(AP_CONTROL_0,
Linus Torvalds 2005-04-16 170 (((area->dx & 0xf) - (area->sx & 0xf)) % 16) | (0x4 << 5));
Linus Torvalds 2005-04-16 171 if ((area->dx & 0xf) < (area->sx & 0xf))
Linus Torvalds 2005-04-16 172 pre_read = 1;
Linus Torvalds 2005-04-16 173 } else {
Linus Torvalds 2005-04-16 174 y_delta = -((info->fix.line_length * 8) - area->sx - area->width);
Linus Torvalds 2005-04-16 175 x_end = area->dx - area->width + 1;
Linus Torvalds 2005-04-16 176 x_word_count = (area->dx >> 4) - (x_end >> 4) + 1;
Linus Torvalds 2005-04-16 177 start_mask = 0x7ffff >> (area->dx & 0xf);
Linus Torvalds 2005-04-16 178 end_mask = 0xffff0000 >> (x_end & 0xf);
Linus Torvalds 2005-04-16 179 out_8(AP_CONTROL_0,
Linus Torvalds 2005-04-16 180 ((-((area->sx & 0xf) - (area->dx & 0xf))) % 16) |
Linus Torvalds 2005-04-16 181 (0x4 << 5));
Linus Torvalds 2005-04-16 182 if ((area->dx & 0xf) > (area->sx & 0xf))
Linus Torvalds 2005-04-16 183 pre_read = 1;
Linus Torvalds 2005-04-16 184 }
Linus Torvalds 2005-04-16 185
Linus Torvalds 2005-04-16 186 for (i = 0; i < area->height; i++) {
Linus Torvalds 2005-04-16 187
Linus Torvalds 2005-04-16 188 out_8(AP_CONTROL_3A, 0xc | (dest >> 16));
Linus Torvalds 2005-04-16 189
Linus Torvalds 2005-04-16 190 if (pre_read) {
Linus Torvalds 2005-04-16 191 dummy = *src;
Linus Torvalds 2005-04-16 192 src += incr;
Linus Torvalds 2005-04-16 193 }
Linus Torvalds 2005-04-16 194
Linus Torvalds 2005-04-16 195 if (x_word_count) {
Linus Torvalds 2005-04-16 196 out_8(AP_WRITE_ENABLE, start_mask);
Linus Torvalds 2005-04-16 197 *src = dest;
Linus Torvalds 2005-04-16 198 src += incr;
Linus Torvalds 2005-04-16 199 dest += incr;
Linus Torvalds 2005-04-16 200 out_8(AP_WRITE_ENABLE, 0);
Linus Torvalds 2005-04-16 201
Linus Torvalds 2005-04-16 202 for (j = 1; j < (x_word_count - 1); j++) {
Linus Torvalds 2005-04-16 203 *src = dest;
Linus Torvalds 2005-04-16 204 src += incr;
Linus Torvalds 2005-04-16 205 dest += incr;
Linus Torvalds 2005-04-16 206 }
Linus Torvalds 2005-04-16 207
Linus Torvalds 2005-04-16 208 out_8(AP_WRITE_ENABLE, start_mask);
Linus Torvalds 2005-04-16 209 *src = dest;
Linus Torvalds 2005-04-16 210 dest += incr;
Linus Torvalds 2005-04-16 211 src += incr;
Linus Torvalds 2005-04-16 212 } else {
Linus Torvalds 2005-04-16 213 out_8(AP_WRITE_ENABLE, start_mask | end_mask);
Linus Torvalds 2005-04-16 214 *src = dest;
Linus Torvalds 2005-04-16 215 dest += incr;
Linus Torvalds 2005-04-16 216 src += incr;
Linus Torvalds 2005-04-16 217 }
Linus Torvalds 2005-04-16 218 src += (y_delta / 16);
Linus Torvalds 2005-04-16 219 dest += (y_delta / 16);
Linus Torvalds 2005-04-16 220 }
Linus Torvalds 2005-04-16 221 out_8(AP_CONTROL_0, NORMAL_MODE);
Linus Torvalds 2005-04-16 222 }
Linus Torvalds 2005-04-16 223
Linus Torvalds 2005-04-16 224 /*
Linus Torvalds 2005-04-16 225 * Initialization
Linus Torvalds 2005-04-16 226 */
Linus Torvalds 2005-04-16 227
Greg Kroah-Hartman 2012-12-21 228 static int dnfb_probe(struct platform_device *dev)
Linus Torvalds 2005-04-16 229 {
Linus Torvalds 2005-04-16 230 struct fb_info *info;
Linus Torvalds 2005-04-16 231 int err = 0;
Linus Torvalds 2005-04-16 232
Linus Torvalds 2005-04-16 233 info = framebuffer_alloc(0, &dev->dev);
Linus Torvalds 2005-04-16 234 if (!info)
Linus Torvalds 2005-04-16 235 return -ENOMEM;
Linus Torvalds 2005-04-16 236
Linus Torvalds 2005-04-16 237 info->fbops = &dn_fb_ops;
Linus Torvalds 2005-04-16 238 info->fix = dnfb_fix;
Linus Torvalds 2005-04-16 239 info->var = dnfb_var;
Linus Torvalds 2005-04-16 240 info->var.red.length = 1;
Linus Torvalds 2005-04-16 241 info->var.red.offset = 0;
Linus Torvalds 2005-04-16 242 info->var.green = info->var.blue = info->var.red;
Linus Torvalds 2005-04-16 @243 info->screen_base = (u_char *) info->fix.smem_start;
Linus Torvalds 2005-04-16 244
Linus Torvalds 2005-04-16 245 err = fb_alloc_cmap(&info->cmap, 2, 0);
Markus Elfring 2017-11-09 246 if (err < 0)
Markus Elfring 2017-11-09 247 goto release_framebuffer;
Linus Torvalds 2005-04-16 248
Linus Torvalds 2005-04-16 249 err = register_framebuffer(info);
Linus Torvalds 2005-04-16 250 if (err < 0) {
Linus Torvalds 2005-04-16 251 fb_dealloc_cmap(&info->cmap);
Markus Elfring 2017-11-09 252 goto release_framebuffer;
Linus Torvalds 2005-04-16 253 }
Russell King 2005-11-09 254 platform_set_drvdata(dev, info);
Linus Torvalds 2005-04-16 255
Linus Torvalds 2005-04-16 256 /* now we have registered we can safely setup the hardware */
Linus Torvalds 2005-04-16 257 out_8(AP_CONTROL_3A, RESET_CREG);
Linus Torvalds 2005-04-16 258 out_be16(AP_WRITE_ENABLE, 0x0);
Linus Torvalds 2005-04-16 259 out_8(AP_CONTROL_0, NORMAL_MODE);
Linus Torvalds 2005-04-16 260 out_8(AP_CONTROL_1, (AD_BLT | DST_EQ_SRC | NORM_CREG1));
Linus Torvalds 2005-04-16 261 out_8(AP_CONTROL_2, S_DATA_PLN);
Linus Torvalds 2005-04-16 262 out_be16(AP_ROP_1, SWAP(0x3));
Linus Torvalds 2005-04-16 263
Linus Torvalds 2005-04-16 264 printk("apollo frame buffer alive and kicking !\n");
Linus Torvalds 2005-04-16 265 return err;
Markus Elfring 2017-11-09 266
Markus Elfring 2017-11-09 267 release_framebuffer:
Markus Elfring 2017-11-09 268 framebuffer_release(info);
Markus Elfring 2017-11-09 269 return err;
Linus Torvalds 2005-04-16 270 }
Linus Torvalds 2005-04-16 271
was first introduced by commit
Linux-2.6.12-rc2
ds@xxxxxxxxxxxxxxx>
ds@xxxxxxxxxxxxxxx>
Intel Corporation
ts.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx">https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
>.config.gz

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