Hi Baolin, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 06a81c1c7db9bd5de0bd38cd5acc44bb22b99150 commit: ffd0bbfb378ecd56eac22bf932ccdbf89ac7f725 hwspinlock: Allow drivers to be built with COMPILE_TEST date: 5 months ago config: i386-randconfig-s031-20200809 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-118-ge1578773-dirty git checkout ffd0bbfb378ecd56eac22bf932ccdbf89ac7f725 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/hwspinlock/stm32_hwspinlock.c:30:39: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void [noderef] <asn:2> *lock_addr @@ got void *priv @@ drivers/hwspinlock/stm32_hwspinlock.c:30:39: sparse: expected void [noderef] <asn:2> *lock_addr drivers/hwspinlock/stm32_hwspinlock.c:41:39: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void [noderef] <asn:2> *lock_addr @@ got void *priv @@ drivers/hwspinlock/stm32_hwspinlock.c:41:39: sparse: expected void [noderef] <asn:2> *lock_addr drivers/hwspinlock/stm32_hwspinlock.c:41:39: sparse: got void *priv drivers/hwspinlock/stm32_hwspinlock.c:78:39: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *priv @@ got void [noderef] <asn:2> * @@ drivers/hwspinlock/stm32_hwspinlock.c:78:39: sparse: got void [noderef] <asn:2> * -- drivers/hwspinlock/sirf_hwspinlock.c:35:39: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void [noderef] <asn:2> *lock_addr @@ got void *priv @@ drivers/hwspinlock/sirf_hwspinlock.c:35:39: sparse: expected void [noderef] <asn:2> *lock_addr drivers/hwspinlock/sirf_hwspinlock.c:43:39: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void [noderef] <asn:2> *lock_addr @@ got void *priv @@ drivers/hwspinlock/sirf_hwspinlock.c:43:39: sparse: expected void [noderef] <asn:2> *lock_addr drivers/hwspinlock/sirf_hwspinlock.c:43:39: sparse: got void *priv drivers/hwspinlock/sirf_hwspinlock.c:77:30: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *priv @@ got void [noderef] <asn:2> * @@ drivers/hwspinlock/sirf_hwspinlock.c:77:30: sparse: got void [noderef] <asn:2> * -- drivers/hwspinlock/sprd_hwspinlock.c:46:34: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void [noderef] <asn:2> *addr @@ got void *priv @@ drivers/hwspinlock/sprd_hwspinlock.c:46:34: sparse: expected void [noderef] <asn:2> *addr drivers/hwspinlock/sprd_hwspinlock.c:64:39: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void [noderef] <asn:2> *lock_addr @@ got void *priv @@ drivers/hwspinlock/sprd_hwspinlock.c:64:39: sparse: expected void [noderef] <asn:2> *lock_addr drivers/hwspinlock/sprd_hwspinlock.c:64:39: sparse: got void *priv drivers/hwspinlock/sprd_hwspinlock.c:131:28: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *priv @@ got void [noderef] <asn:2> * @@ drivers/hwspinlock/sprd_hwspinlock.c:131:28: sparse: got void [noderef] <asn:2> * vim +30 drivers/hwspinlock/stm32_hwspinlock.c f24fcff1d267da Benjamin Gaignard 2018-11-14 27 f24fcff1d267da Benjamin Gaignard 2018-11-14 28 static int stm32_hwspinlock_trylock(struct hwspinlock *lock) f24fcff1d267da Benjamin Gaignard 2018-11-14 29 { f24fcff1d267da Benjamin Gaignard 2018-11-14 @30 void __iomem *lock_addr = lock->priv; f24fcff1d267da Benjamin Gaignard 2018-11-14 31 u32 status; f24fcff1d267da Benjamin Gaignard 2018-11-14 32 f24fcff1d267da Benjamin Gaignard 2018-11-14 33 writel(STM32_MUTEX_LOCK_BIT | STM32_MUTEX_COREID, lock_addr); f24fcff1d267da Benjamin Gaignard 2018-11-14 34 status = readl(lock_addr); f24fcff1d267da Benjamin Gaignard 2018-11-14 35 f24fcff1d267da Benjamin Gaignard 2018-11-14 36 return status == (STM32_MUTEX_LOCK_BIT | STM32_MUTEX_COREID); f24fcff1d267da Benjamin Gaignard 2018-11-14 37 } f24fcff1d267da Benjamin Gaignard 2018-11-14 38 f24fcff1d267da Benjamin Gaignard 2018-11-14 39 static void stm32_hwspinlock_unlock(struct hwspinlock *lock) f24fcff1d267da Benjamin Gaignard 2018-11-14 40 { f24fcff1d267da Benjamin Gaignard 2018-11-14 41 void __iomem *lock_addr = lock->priv; f24fcff1d267da Benjamin Gaignard 2018-11-14 42 f24fcff1d267da Benjamin Gaignard 2018-11-14 43 writel(STM32_MUTEX_COREID, lock_addr); f24fcff1d267da Benjamin Gaignard 2018-11-14 44 } f24fcff1d267da Benjamin Gaignard 2018-11-14 45 5cd69f13deef80 Fabien Dessenne 2019-03-07 46 static void stm32_hwspinlock_relax(struct hwspinlock *lock) 5cd69f13deef80 Fabien Dessenne 2019-03-07 47 { 5cd69f13deef80 Fabien Dessenne 2019-03-07 48 ndelay(50); 5cd69f13deef80 Fabien Dessenne 2019-03-07 49 } 5cd69f13deef80 Fabien Dessenne 2019-03-07 50 f24fcff1d267da Benjamin Gaignard 2018-11-14 51 static const struct hwspinlock_ops stm32_hwspinlock_ops = { f24fcff1d267da Benjamin Gaignard 2018-11-14 52 .trylock = stm32_hwspinlock_trylock, f24fcff1d267da Benjamin Gaignard 2018-11-14 53 .unlock = stm32_hwspinlock_unlock, 5cd69f13deef80 Fabien Dessenne 2019-03-07 54 .relax = stm32_hwspinlock_relax, f24fcff1d267da Benjamin Gaignard 2018-11-14 55 }; f24fcff1d267da Benjamin Gaignard 2018-11-14 56 f24fcff1d267da Benjamin Gaignard 2018-11-14 57 static int stm32_hwspinlock_probe(struct platform_device *pdev) f24fcff1d267da Benjamin Gaignard 2018-11-14 58 { f24fcff1d267da Benjamin Gaignard 2018-11-14 59 struct stm32_hwspinlock *hw; f24fcff1d267da Benjamin Gaignard 2018-11-14 60 void __iomem *io_base; f24fcff1d267da Benjamin Gaignard 2018-11-14 61 size_t array_size; f24fcff1d267da Benjamin Gaignard 2018-11-14 62 int i, ret; f24fcff1d267da Benjamin Gaignard 2018-11-14 63 d4824486b676ef Yangtao Li 2019-12-28 64 io_base = devm_platform_ioremap_resource(pdev, 0); 4d5a91fd1f42a8 Wei Yongjun 2019-01-03 65 if (IS_ERR(io_base)) 4d5a91fd1f42a8 Wei Yongjun 2019-01-03 66 return PTR_ERR(io_base); f24fcff1d267da Benjamin Gaignard 2018-11-14 67 f24fcff1d267da Benjamin Gaignard 2018-11-14 68 array_size = STM32_MUTEX_NUM_LOCKS * sizeof(struct hwspinlock); f24fcff1d267da Benjamin Gaignard 2018-11-14 69 hw = devm_kzalloc(&pdev->dev, sizeof(*hw) + array_size, GFP_KERNEL); f24fcff1d267da Benjamin Gaignard 2018-11-14 70 if (!hw) f24fcff1d267da Benjamin Gaignard 2018-11-14 71 return -ENOMEM; f24fcff1d267da Benjamin Gaignard 2018-11-14 72 f24fcff1d267da Benjamin Gaignard 2018-11-14 73 hw->clk = devm_clk_get(&pdev->dev, "hsem"); f24fcff1d267da Benjamin Gaignard 2018-11-14 74 if (IS_ERR(hw->clk)) f24fcff1d267da Benjamin Gaignard 2018-11-14 75 return PTR_ERR(hw->clk); f24fcff1d267da Benjamin Gaignard 2018-11-14 76 f24fcff1d267da Benjamin Gaignard 2018-11-14 77 for (i = 0; i < STM32_MUTEX_NUM_LOCKS; i++) f24fcff1d267da Benjamin Gaignard 2018-11-14 @78 hw->bank.lock[i].priv = io_base + i * sizeof(u32); f24fcff1d267da Benjamin Gaignard 2018-11-14 79 f24fcff1d267da Benjamin Gaignard 2018-11-14 80 platform_set_drvdata(pdev, hw); f24fcff1d267da Benjamin Gaignard 2018-11-14 81 pm_runtime_enable(&pdev->dev); f24fcff1d267da Benjamin Gaignard 2018-11-14 82 f24fcff1d267da Benjamin Gaignard 2018-11-14 83 ret = hwspin_lock_register(&hw->bank, &pdev->dev, &stm32_hwspinlock_ops, f24fcff1d267da Benjamin Gaignard 2018-11-14 84 0, STM32_MUTEX_NUM_LOCKS); f24fcff1d267da Benjamin Gaignard 2018-11-14 85 f24fcff1d267da Benjamin Gaignard 2018-11-14 86 if (ret) f24fcff1d267da Benjamin Gaignard 2018-11-14 87 pm_runtime_disable(&pdev->dev); f24fcff1d267da Benjamin Gaignard 2018-11-14 88 f24fcff1d267da Benjamin Gaignard 2018-11-14 89 return ret; f24fcff1d267da Benjamin Gaignard 2018-11-14 90 } f24fcff1d267da Benjamin Gaignard 2018-11-14 91 :::::: The code at line 30 was first introduced by commit :::::: f24fcff1d267da08c4bbb3869e7f4b36ce916b76 hwspinlock: add STM32 hwspinlock device :::::: TO: Benjamin Gaignard <benjamin.gaignard(a)st.com&gt; :::::: CC: Bjorn Andersson <bjorn.andersson(a)linaro.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org