[nomadik:gemini 37/45] drivers/pci/host/pci-ftpci100.c:175:2: error: implicit declaration of function 'pr_dbg'

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git gemini
head:   b5a084bbd084caf3c47995083d03bdc847a9f445
commit: f81a2826bb2369b05cd06a97b27d9e3fbdc2150e [37/45] PCI: add driver for Faraday Technology Host Bridge
config: arm-allmodconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout f81a2826bb2369b05cd06a97b27d9e3fbdc2150e
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All errors (new ones prefixed by >>):

   drivers/pci/host/pci-ftpci100.c: In function 'faraday_res_to_memcfg':
>> drivers/pci/host/pci-ftpci100.c:175:2: error: implicit declaration of function 'pr_dbg' [-Werror=implicit-function-declaration]
     pr_dbg("Translated pci base @%08x, size %08x to config %08x\n",
     ^~~~~~
   cc1: some warnings being treated as errors

vim +/pr_dbg +175 drivers/pci/host/pci-ftpci100.c

   169	
   170		/* This is probably not good */
   171		if (mem_base & ~(FARADAY_PCI_MEMBASE_MASK))
   172			pr_warn("truncated PCI memory base\n");
   173		/* Translate to bridge side address space */
   174		outval |= (mem_base & FARADAY_PCI_MEMBASE_MASK);
 > 175		pr_dbg("Translated pci base @%08x, size %08x to config %08x\n",
   176		       mem_base, mem_size, outval);
   177	
   178		*val = outval;

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