tree: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-4.20 head: 7ece50c9f790270e82b77589d34e54547c895a66 commit: 8307b2afd386ccce369821daa2196068c47fe8cd [519/523] ASoC: stm32: sai: set sai as mclk clock provider config: microblaze-allyesconfig (attached as .config) compiler: microblaze-linux-gcc (GCC) 8.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 8307b2afd386ccce369821daa2196068c47fe8cd # save the attached .config to linux build tree GCC_VERSION=8.1.0 make.cross ARCH=microblaze

All warnings (new ones prefixed by >>):

sound/soc/stm/stm32_sai_sub.c: In function 'stm32_sai_add_mclk_provider':

...

sound/soc/stm/stm32_sai_sub.c:412:3: warning: 'strncat' specified bound 6 equals source length [-Wstringop-overflow=]

strncat(p, "a_mclk", 6) : strncat(p, "b_mclk", 6); ^~~~~~~~~~~~~~~~~~~~~~~ sound/soc/stm/stm32_sai_sub.c:412:29: warning: 'strncat' specified bound 6 equals source length [-Wstringop-overflow=] strncat(p, "a_mclk", 6) : strncat(p, "b_mclk", 6); ^~~~~~~~~~~~~~~~~~~~~~~

vim +/strncat +412 sound/soc/stm/stm32_sai_sub.c

383 384 static int stm32_sai_add_mclk_provider(struct stm32_sai_sub_data *sai) 385 { 386 struct clk_hw *hw; 387 struct stm32_sai_mclk_data *mclk; 388 struct device *dev = &sai->pdev->dev; 389 const char *pname = __clk_get_name(sai->sai_ck); 390 char *mclk_name, *p, *s = (char *)pname; 391 int ret, i = 0; 392 393 mclk = devm_kzalloc(dev, sizeof(mclk), GFP_KERNEL); 394 if (!mclk) 395 return -ENOMEM; 396 397 mclk_name = devm_kcalloc(dev, sizeof(char), 398 SAI_MCLK_NAME_LEN, GFP_KERNEL); 399 if (!mclk_name) 400 return -ENOMEM; 401 402 /* 403 * Forge mclk clock name from parent clock name and suffix. 404 * String after "_" char is stripped in parent name. 405 */ 406 p = mclk_name; 407 while (*s && *s != '_' && (i < (SAI_MCLK_NAME_LEN - 6))) { 408 *p++ = *s++; 409 i++; 410 } 411 STM_SAI_IS_SUB_A(sai) ?

412 strncat(p, "a_mclk", 6) : strncat(p, "b_mclk", 6);

413 414 mclk->hw.init = CLK_HW_INIT(mclk_name, pname, &mclk_ops, 0); 415 mclk->sai_data = sai; 416 hw = &mclk->hw; 417 418 dev_dbg(dev, "Register master clock %s\n", mclk_name); 419 ret = devm_clk_hw_register(&sai->pdev->dev, hw); 420 if (ret) { 421 dev_err(dev, "mclk register returned %d\n", ret); 422 return ret; 423 } 424 sai->sai_mclk = hw->clk; 425 426 /* register mclk provider */ 427 return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, hw); 428 } 429

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