tree:   https://github.com/sbates130272/linux-p2pmem.git p2pdma_user_cmb_x4
head:   fa4cb582249aff75fc288e643e5dc9b6c303daaa
commit: c2a06cbc32a9c52483512859be6b79e47516c3b3 [14/24] dma-direct: Support PCI P2PDMA pages in dma-direct map_sg
config: x86_64-randconfig-a001-20200930 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project bcd05599d0e53977a963799d6ee4f6e0bc21331b)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/sbates130272/linux-p2pmem/commit/c2a06cbc32a9c52483512859be6b79e47516c3b3
        git remote add p2pmem https://github.com/sbates130272/linux-p2pmem.git
        git fetch --no-tags p2pmem p2pdma_user_cmb_x4
        git checkout c2a06cbc32a9c52483512859be6b79e47516c3b3
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> kernel/dma/direct.c:385:11: error: implicit declaration of function 'pci_p2pdma_should_map_bus' [-Werror,-Wimplicit-function-declaration]
                                   map = pci_p2pdma_should_map_bus(dev, pgmap);
                                         ^
>> kernel/dma/direct.c:386:48: error: too few arguments to function call, expected 3, have 1
                                   bus_off = pci_p2pdma_bus_offset(sg_page(sg));
                                             ~~~~~~~~~~~~~~~~~~~~~            ^
   include/linux/pci-p2pdma.h:88:19: note: 'pci_p2pdma_bus_offset' declared here
   static inline int pci_p2pdma_bus_offset(struct device *dev,
                     ^
   2 errors generated.

vim +/pci_p2pdma_should_map_bus +385 kernel/dma/direct.c

   372	
   373	int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
   374			enum dma_data_direction dir, unsigned long attrs)
   375	{
   376		struct dev_pagemap *pgmap = NULL;
   377		int i, map = -1;
   378		struct scatterlist *sg;
   379		u64 bus_off;
   380	
   381		for_each_sg(sgl, sg, nents, i) {
   382			if (is_pci_p2pdma_page(sg_page(sg))) {
   383				if (sg_page(sg)->pgmap != pgmap) {
   384					pgmap = sg_page(sg)->pgmap;
 > 385					map = pci_p2pdma_should_map_bus(dev, pgmap);
 > 386					bus_off = pci_p2pdma_bus_offset(sg_page(sg));
   387				}
   388	
   389				if (map < 0 || !(attrs & DMA_ATTR_P2PDMA)) {
   390					sg->dma_address = DMA_MAPPING_ERROR;
   391					goto out_unmap;
   392				}
   393	
   394				if (map) {
   395					sg->dma_address = sg_phys(sg) + sg->offset -
   396						bus_off;
   397					sg_dma_len(sg) = sg->length | SG_P2PDMA_FLAG;
   398					continue;
   399				}
   400			}
   401	
   402			sg->dma_address = dma_direct_map_page(dev, sg_page(sg),
   403					sg->offset, sg->length, dir, attrs);
   404			if (sg->dma_address == DMA_MAPPING_ERROR)
   405				goto out_unmap;
   406			sg_dma_len(sg) = sg->length;
   407		}
   408	
   409		return nents;
   410	
   411	out_unmap:
   412		dma_direct_unmap_sg(dev, sgl, i, dir, attrs | DMA_ATTR_SKIP_CPU_SYNC);
   413		return 0;
   414	}
   415	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org