tree: https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master head: 0a8f5989e03476cfb2a7756e33fa4d0163cb4375 commit: a583ed310bb6b514e717c11a30b5a7bc3a65d1b1 [7/24] hwrng: cctrng - introduce Arm CryptoCell driver config: s390-defconfig (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout a583ed310bb6b514e717c11a30b5a7bc3a65d1b1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/char/hw_random/cctrng.c: In function 'cc_trng_compwork_handler': 334 | if (CC_REG_FLD_GET(RNG_ISR, CRNGT_ERR, isr) && fips_enabled) { | ^~~~~~~~~~~~ | vdso_enabled drivers/char/hw_random/cctrng.c:334:49: note: each undeclared identifier is reported only once for each function it appears in 335 | fips_fail_notify(); | ^~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +334 drivers/char/hw_random/cctrng.c 314 315 void cc_trng_compwork_handler(struct work_struct *w) 316 { 317 u32 isr = 0; 318 u32 ehr_valid = 0; 319 struct cctrng_drvdata *drvdata = 320 container_of(w, struct cctrng_drvdata, compwork); 321 struct device *dev = &(drvdata->pdev->dev); 322 int i; 323 324 /* stop DMA and the RNG source */ 325 cc_iowrite(drvdata, CC_RNG_DMA_ENABLE_REG_OFFSET, 0); 326 cc_iowrite(drvdata, CC_RND_SOURCE_ENABLE_REG_OFFSET, 0); 327 328 /* read RNG_ISR and check for errors */ 329 isr = cc_ioread(drvdata, CC_RNG_ISR_REG_OFFSET); 330 ehr_valid = CC_REG_FLD_GET(RNG_ISR, EHR_VALID, isr); 331 dev_dbg(dev, "Got RNG_ISR=0x%08X (EHR_VALID=%u)\n", isr, ehr_valid); 332 333 #ifdef CONFIG_CRYPTO_FIPS 336 /* FIPS error is fatal */ 337 panic("Got HW CRNGT error while fips is enabled!\n"); 338 } 339 #endif 340 341 /* Clear all pending RNG interrupts */ 342 cc_iowrite(drvdata, CC_RNG_ICR_REG_OFFSET, isr); 343 344 345 if (!ehr_valid) { 346 /* in case of AUTOCORR/TIMEOUT error, try the next ROSC */ 347 if (CC_REG_FLD_GET(RNG_ISR, AUTOCORR_ERR, isr) || 348 CC_REG_FLD_GET(RNG_ISR, WATCHDOG, isr)) { 349 dev_dbg(dev, "cctrng autocorr/timeout error.\n"); 350 goto next_rosc; 351 } 352 353 /* in case of VN error, ignore it */ 354 } 355 356 /* read EHR data from registers */ 357 for (i = 0; i < CC_TRNG_EHR_IN_WORDS; i++) { 358 /* calc word ptr in data_buf */ 359 u32 *buf = (u32 *)drvdata->circ.buf; 360 361 buf[drvdata->circ.head] = cc_ioread(drvdata, 362 CC_EHR_DATA_0_REG_OFFSET + (i*sizeof(u32))); 363 364 /* EHR_DATA registers are cleared on read. In case 0 value was 365 * returned, restart the entropy collection. 366 */ 367 if (buf[drvdata->circ.head] == 0) { 368 dev_dbg(dev, "Got 0 value in EHR. active_rosc %u\n", 369 drvdata->active_rosc); 370 goto next_rosc; 371 } 372 373 circ_idx_inc(&drvdata->circ.head, 1<<2); 374 } 375 376 atomic_set(&drvdata->pending_hw, 0); 377 378 /* continue to fill data buffer if needed */ 379 if (circ_buf_space(drvdata) >= CC_TRNG_EHR_IN_WORDS) { 380 if (atomic_cmpxchg(&drvdata->pending_hw, 0, 1) == 0) { 381 /* Re-enable rnd source */ 382 cc_trng_enable_rnd_source(drvdata); 383 return; 384 } 385 } 386 387 cc_trng_pm_put_suspend(dev); 388 389 dev_dbg(dev, "compwork handler done\n"); 390 return; 391 392 next_rosc: 393 if ((circ_buf_space(drvdata) >= CC_TRNG_EHR_IN_WORDS) && 394 (cc_trng_change_rosc(drvdata) == 0)) { 395 /* trigger trng hw with next rosc */ 396 cc_trng_hw_trigger(drvdata); 397 } else { 398 atomic_set(&drvdata->pending_hw, 0); 399 cc_trng_pm_put_suspend(dev); 400 } 401 } 402 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org