tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/tiwai/sound.git topic/hda-bus-ops-cleanup head: d4ff1b3917a529bdc75592af6b1504ad6c4029f7 commit: 19abfefd4c7604993d1c31e098a3f48bdafe334d [2/3] ALSA: hda: Direct MMIO accesses config: arm-defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 19abfefd4c7604993d1c31e098a3f48bdafe334d # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=arm

If you fix the issue, kindly add following tag Reported-by: kbuild test robot lkp@intel.com

All errors (new ones prefixed by >>):

sound/hda/hdac_bus.c: In function 'snd_hdac_aligned_read':

...

sound/hda/hdac_bus.c:228:6: error: implicit declaration of function 'readl'; did you mean 'd_real'? [-Werror=implicit-function-declaration]

v = readl(aligned_addr); ^~~~~ d_real sound/hda/hdac_bus.c: In function 'snd_hdac_aligned_write':

...

sound/hda/hdac_bus.c:244:2: error: implicit declaration of function 'writel' [-Werror=implicit-function-declaration]

writel(v, aligned_addr); ^~~~~~ cc1: some warnings being treated as errors

vim +228 sound/hda/hdac_bus.c

218 219 #ifdef CONFIG_SND_HDA_ALIGNED_MMIO 220 /* Helpers for aligned read/write of mmio space, for Tegra */ 221 unsigned int snd_hdac_aligned_read(void __iomem *addr, unsigned int mask) 222 { 223 void __iomem *aligned_addr = 224 (void __iomem *)((unsigned long)(addr) & ~0x3); 225 unsigned int shift = ((unsigned long)(addr) & 0x3) << 3; 226 unsigned int v; 227

228 v = readl(aligned_addr);

229 return (v >> shift) & mask; 230 } 231 EXPORT_SYMBOL_GPL(snd_hdac_aligned_read); 232 233 void snd_hdac_aligned_write(unsigned int val, void __iomem *addr, 234 unsigned int mask) 235 { 236 void __iomem *aligned_addr = 237 (void __iomem *)((unsigned long)(addr) & ~0x3); 238 unsigned int shift = ((unsigned long)(addr) & 0x3) << 3; 239 unsigned int v; 240 241 v = readl(aligned_addr); 242 v &= ~(mask << shift); 243 v |= val << shift;

244 writel(v, aligned_addr);

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