Hi Takashi, I love your patch! Yet something to improve: [auto build test ERROR on sound/for-next] [also build test ERROR on next-20210713] [cannot apply to v5.14-rc1] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Takashi-Iwai/ALSA-More-devres-us... base: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next config: arm64-randconfig-r006-20210713 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8d69635ed9ecf36fd0ca85906bfde17949671cbe) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/a283d143a861578b305e87de7df0178f9... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Takashi-Iwai/ALSA-More-devres-usages/20210713-225131 git checkout a283d143a861578b305e87de7df0178f9d0adfa8 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash sound/drivers/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): uart = devm_kzalloc(sizeof(*uart), GFP_KERNEL); ~~~~~~~~~~~~ ^ include/linux/device.h:206:21: note: 'devm_kzalloc' declared here static inline void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp) ^ 1 error generated. vim +766 sound/drivers/serial-u16550.c 752 753 static int snd_uart16550_create(struct snd_card *card, 754 unsigned long iobase, 755 int irq, 756 unsigned int speed, 757 unsigned int base, 758 int adaptor, 759 int droponfull, 760 struct snd_uart16550 **ruart) 761 { 762 struct snd_uart16550 *uart; 763 int err; 764 765 767 if (!uart) 768 return -ENOMEM; 769 uart->adaptor = adaptor; 770 uart->card = card; 771 spin_lock_init(&uart->open_lock); 772 uart->irq = -1; 773 uart->base = iobase; 774 uart->drop_on_full = droponfull; 775 776 err = snd_uart16550_detect(uart); 777 if (err <= 0) { 778 printk(KERN_ERR "no UART detected at 0x%lx\n", iobase); 779 return -ENODEV; 780 } 781 782 if (irq >= 0 && irq != SNDRV_AUTO_IRQ) { 783 if (devm_request_irq(card->dev, irq, snd_uart16550_interrupt, 784 0, "Serial MIDI", uart)) { 785 snd_printk(KERN_WARNING 786 "irq %d busy. Using Polling.\n", irq); 787 } else { 788 uart->irq = irq; 789 } 790 } 791 uart->divisor = base / speed; 792 uart->speed = base / (unsigned int)uart->divisor; 793 uart->speed_base = base; 794 uart->prev_out = -1; 795 uart->prev_in = 0; 796 uart->rstatus = 0; 797 memset(uart->prev_status, 0x80, sizeof(unsigned char) * SNDRV_SERIAL_MAX_OUTS); 798 timer_setup(&uart->buffer_timer, snd_uart16550_buffer_timer, 0); 799 uart->timer_running = 0; 800 801 switch (uart->adaptor) { 802 case SNDRV_SERIAL_MS124W_SA: 803 case SNDRV_SERIAL_MS124W_MB: 804 /* MS-124W can draw power from RTS and DTR if they 805 are in opposite states. */ 806 outb(UART_MCR_RTS | (0&UART_MCR_DTR), uart->base + UART_MCR); 807 break; 808 case SNDRV_SERIAL_MS124T: 809 /* MS-124T can draw power from RTS and/or DTR (preferably 810 both) if they are asserted. */ 811 outb(UART_MCR_RTS | UART_MCR_DTR, uart->base + UART_MCR); 812 break; 813 default: 814 break; 815 } 816 817 if (ruart) 818 *ruart = uart; 819 820 return 0; 821 } 822 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org