[driver-core:kobject-const 25/27] arch/mips/sgi-ip22/ip22-gio.c:388:22: error: initialization of 'int (*)(const struct device *, struct kobj_uevent_env *)' from incompatible pointer type 'int (*)(struct device *, struct kobj_uevent_env *)'

From: kernel test robot
Date: Tue Oct 25 2022 - 22:15:59 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git kobject-const
head: f14cb4b015ec0dd52034a4c66fcb581538e51095
commit: d9fe66b89e04a5adc6d116321f79dcb73e4181a7 [25/27] driver core: make struct bus_type.uevent() take a const *
config: mips-buildonly-randconfig-r002-20221024 (attached as .config)
compiler: mips64-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git/commit/?id=d9fe66b89e04a5adc6d116321f79dcb73e4181a7
git remote add driver-core https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git
git fetch --no-tags driver-core kobject-const
git checkout d9fe66b89e04a5adc6d116321f79dcb73e4181a7
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash arch/mips/sgi-ip22/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

arch/mips/sgi-ip22/ip22-gio.c:249:6: warning: no previous prototype for 'ip22_gio_set_64bit' [-Wmissing-prototypes]
249 | void ip22_gio_set_64bit(int slotno)
| ^~~~~~~~~~~~~~~~~~
>> arch/mips/sgi-ip22/ip22-gio.c:388:22: error: initialization of 'int (*)(const struct device *, struct kobj_uevent_env *)' from incompatible pointer type 'int (*)(struct device *, struct kobj_uevent_env *)' [-Werror=incompatible-pointer-types]
388 | .uevent = gio_device_uevent,
| ^~~~~~~~~~~~~~~~~
arch/mips/sgi-ip22/ip22-gio.c:388:22: note: (near initialization for 'gio_bus_type.uevent')
arch/mips/sgi-ip22/ip22-gio.c:398:12: warning: no previous prototype for 'ip22_gio_init' [-Wmissing-prototypes]
398 | int __init ip22_gio_init(void)
| ^~~~~~~~~~~~~
cc1: some warnings being treated as errors


vim +388 arch/mips/sgi-ip22/ip22-gio.c

e84de0c6190503 Thomas Bogendoerfer 2011-11-22 248
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 @249 void ip22_gio_set_64bit(int slotno)
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 250 {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 251 u32 tmp = sgimc->giopar;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 252
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 253 switch (slotno) {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 254 case 0:
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 255 tmp |= SGIMC_GIOPAR_GFX64;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 256 break;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 257 case 1:
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 258 tmp |= SGIMC_GIOPAR_EXP064;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 259 break;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 260 case 2:
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 261 tmp |= SGIMC_GIOPAR_EXP164;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 262 break;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 263 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 264 sgimc->giopar = tmp;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 265 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 266
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 267 static int ip22_gio_id(unsigned long addr, u32 *res)
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 268 {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 269 u8 tmp8;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 270 u8 tmp16;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 271 u32 tmp32;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 272 u8 *ptr8;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 273 u16 *ptr16;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 274 u32 *ptr32;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 275
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 276 ptr32 = (void *)CKSEG1ADDR(addr);
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 277 if (!get_dbe(tmp32, ptr32)) {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 278 /*
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 279 * We got no DBE, but this doesn't mean anything.
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 280 * If GIO is pipelined (which can't be disabled
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 281 * for GFX slot) we don't get a DBE, but we see
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 282 * the transfer size as data. So we do an 8bit
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 283 * and a 16bit access and check whether the common
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 284 * data matches
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 285 */
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 286 ptr8 = (void *)CKSEG1ADDR(addr + 3);
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 287 if (get_dbe(tmp8, ptr8)) {
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 288 /*
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 289 * 32bit access worked, but 8bit doesn't
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 290 * so we don't see phantom reads on
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 291 * a pipelined bus, but a real card which
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 292 * doesn't support 8 bit reads
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 293 */
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 294 *res = tmp32;
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 295 return 1;
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 296 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 297 ptr16 = (void *)CKSEG1ADDR(addr + 2);
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 298 get_dbe(tmp16, ptr16);
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 299 if (tmp8 == (tmp16 & 0xff) &&
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 300 tmp8 == (tmp32 & 0xff) &&
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 301 tmp16 == (tmp32 & 0xffff)) {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 302 *res = tmp32;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 303 return 1;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 304 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 305 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 306 return 0; /* nothing here */
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 307 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 308
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 309 #define HQ2_MYSTERY_OFFS 0x6A07C
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 310 #define NEWPORT_USTATUS_OFFS 0xF133C
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 311
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 312 static int ip22_is_gr2(unsigned long addr)
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 313 {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 314 u32 tmp;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 315 u32 *ptr;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 316
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 317 /* HQ2 only allows 32bit accesses */
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 318 ptr = (void *)CKSEG1ADDR(addr + HQ2_MYSTERY_OFFS);
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 319 if (!get_dbe(tmp, ptr)) {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 320 if (tmp == 0xdeadbeef)
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 321 return 1;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 322 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 323 return 0;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 324 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 325
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 326
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 327 static void ip22_check_gio(int slotno, unsigned long addr, int irq)
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 328 {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 329 const char *name = "Unknown";
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 330 struct gio_device *gio_dev;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 331 u32 tmp;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 332 __u8 id;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 333 int i;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 334
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 335 /* first look for GR2/GR3 by checking mystery register */
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 336 if (ip22_is_gr2(addr))
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 337 tmp = 0x7f;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 338 else {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 339 if (!ip22_gio_id(addr, &tmp)) {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 340 /*
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 341 * no GIO signature at start address of slot
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 342 * since Newport doesn't have one, we check if
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 343 * user status register is readable
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 344 */
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 345 if (ip22_gio_id(addr + NEWPORT_USTATUS_OFFS, &tmp))
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 346 tmp = 0x7e;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 347 else
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 348 tmp = 0;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 349 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 350 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 351 if (tmp) {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 352 id = GIO_ID(tmp);
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 353 if (tmp & GIO_32BIT_ID) {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 354 if (tmp & GIO_64BIT_IFACE)
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 355 ip22_gio_set_64bit(slotno);
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 356 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 357 for (i = 0; i < ARRAY_SIZE(gio_name_table); i++) {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 358 if (id == gio_name_table[i].id) {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 359 name = gio_name_table[i].name;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 360 break;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 361 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 362 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 363 printk(KERN_INFO "GIO: slot %d : %s (id %x)\n",
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 364 slotno, name, id);
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 365 gio_dev = kzalloc(sizeof *gio_dev, GFP_KERNEL);
f93e2a100ee73a Xiaoke Wang 2022-03-25 366 if (!gio_dev)
f93e2a100ee73a Xiaoke Wang 2022-03-25 367 return;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 368 gio_dev->name = name;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 369 gio_dev->slotno = slotno;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 370 gio_dev->id.id = id;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 371 gio_dev->resource.start = addr;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 372 gio_dev->resource.end = addr + 0x3fffff;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 373 gio_dev->resource.flags = IORESOURCE_MEM;
1d421ca9d7edba Thomas Bogendoerfer 2014-06-04 374 gio_dev->irq = irq;
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 375 dev_set_name(&gio_dev->dev, "%d", slotno);
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 376 gio_device_register(gio_dev);
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 377 } else
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 378 printk(KERN_INFO "GIO: slot %d : Empty\n", slotno);
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 379 }
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 380
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 381 static struct bus_type gio_bus_type = {
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 382 .name = "gio",
136e882fccecea Greg Kroah-Hartman 2017-06-06 383 .dev_groups = gio_dev_groups,
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 384 .match = gio_bus_match,
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 385 .probe = gio_device_probe,
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 386 .remove = gio_device_remove,
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 387 .shutdown = gio_device_shutdown,
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 @388 .uevent = gio_device_uevent,
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 389 };
e84de0c6190503 Thomas Bogendoerfer 2011-11-22 390

:::::: The code at line 388 was first introduced by commit
:::::: e84de0c61905030a0fe66b7210b6f1bb7c3e1eab MIPS: GIO bus support for SGI IP22/28

:::::: TO: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
:::::: CC: Ralf Baechle <ralf@xxxxxxxxxxxxxx>

--
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https://01.org/lkp

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