[kbuild-all] arch/arm/common/sa1111.c:1436:14: error: implicit declaration of function 'dmabounce_register_dev'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 7cf726a59435301046250c42131554d9ccc566b8 commit: 0a0f0d8be76dcd4390ff538e7060fda34db79717 dma-mapping: split <linux/dma-mapping.h> date: 2 weeks ago config: arm-badge4_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 0a0f0d8be76dcd4390ff538e7060fda34db79717 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 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 >>): arch/arm/common/sa1111.c:704:1: warning: no previous prototype for 'sa1111_configure_smc' [-Wmissing-prototypes] 704 | sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac, | ^~~~~~~~~~~~~~~~~~~~ arch/arm/common/sa1111.c: In function 'sa1111_notifier_call': 1436 | int ret = dmabounce_register_dev(&dev->dev, 1024, 4096, | ^~~~~~~~~~~~~~~~~~~~~~ 1445 | dmabounce_unregister_dev(&dev->dev); | ^~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/dmabounce_register_dev +1436 arch/arm/common/sa1111.c 09a2ba2fa0eba3d Russell King 2012-01-29 1427 09a2ba2fa0eba3d Russell King 2012-01-29 1428 static int sa1111_notifier_call(struct notifier_block *n, unsigned long action, 09a2ba2fa0eba3d Russell King 2012-01-29 1429 void *data) 09a2ba2fa0eba3d Russell King 2012-01-29 1430 { b60752f2b20c167 Russell King 2016-09-06 1431 struct sa1111_dev *dev = to_sa1111_device(data); 09a2ba2fa0eba3d Russell King 2012-01-29 1432 09a2ba2fa0eba3d Russell King 2012-01-29 1433 switch (action) { 09a2ba2fa0eba3d Russell King 2012-01-29 1434 case BUS_NOTIFY_ADD_DEVICE: 09a2ba2fa0eba3d Russell King 2012-01-29 1435 if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL) { 09a2ba2fa0eba3d Russell King 2012-01-29 @1436 int ret = dmabounce_register_dev(&dev->dev, 1024, 4096, 09a2ba2fa0eba3d Russell King 2012-01-29 1437 sa1111_needs_bounce); 09a2ba2fa0eba3d Russell King 2012-01-29 1438 if (ret) 09a2ba2fa0eba3d Russell King 2012-01-29 1439 dev_err(&dev->dev, "failed to register with dmabounce: %d\n", ret); 09a2ba2fa0eba3d Russell King 2012-01-29 1440 } 09a2ba2fa0eba3d Russell King 2012-01-29 1441 break; 09a2ba2fa0eba3d Russell King 2012-01-29 1442 09a2ba2fa0eba3d Russell King 2012-01-29 1443 case BUS_NOTIFY_DEL_DEVICE: 09a2ba2fa0eba3d Russell King 2012-01-29 1444 if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL) 09a2ba2fa0eba3d Russell King 2012-01-29 @1445 dmabounce_unregister_dev(&dev->dev); 09a2ba2fa0eba3d Russell King 2012-01-29 1446 break; 09a2ba2fa0eba3d Russell King 2012-01-29 1447 } 09a2ba2fa0eba3d Russell King 2012-01-29 1448 return NOTIFY_OK; 09a2ba2fa0eba3d Russell King 2012-01-29 1449 } 09a2ba2fa0eba3d Russell King 2012-01-29 1450 :::::: The code at line 1436 was first introduced by commit :::::: 09a2ba2fa0eba3da747db860ac1c8c0956665316 ARM: sa1111: register sa1111 devices with dmabounce in bus notifier :::::: TO: Russell King <rmk+kernel(a)arm.linux.org.uk&gt; :::::: CC: Russell King <rmk+kernel(a)arm.linux.org.uk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org