[hch-misc:xtensa-generic-dma 4/5] kernel//dma/direct.c:233:3: error: implicit declaration of function 'vunmap'; did you mean 'kunmap'?

[hch-misc:xtensa-generic-dma 4/5] kernel//dma/direct.c:233:3: error: implicit declaration of function 'vunmap'; did you mean 'kunmap'?

[kbuild test robot]

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tree:   git://git.infradead.org/users/hch/misc.git xtensa-generic-dma
head:   947313c04d14ad79af0f953092f748765e660379
commit: c0b727a24fadd49c9b8824880240ab8fd4784713 [4/5] dma-mapping: merge the generic remapping helpers into dma-direct
config: mips-allmodconfig (attached as .config)
compiler: mips-linux-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 c0b727a24fadd49c9b8824880240ab8fd4784713
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=mips 

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

All errors (new ones prefixed by >>):

   kernel//dma/direct.c: In function 'dma_direct_free_pages':
>> kernel//dma/direct.c:233:3: error: implicit declaration of function 'vunmap'; did you mean 'kunmap'? [-Werror=implicit-function-declaration]
      vunmap(cpu_addr);
      ^~~~~~
      kunmap
   cc1: some warnings being treated as errors

vim +233 kernel//dma/direct.c

   212	
   213	void dma_direct_free_pages(struct device *dev, size_t size, void *cpu_addr,
   214			dma_addr_t dma_addr, unsigned long attrs)
   215	{
   216		unsigned int page_order = get_order(size);
   217	
   218		if ((attrs & DMA_ATTR_NO_KERNEL_MAPPING) &&
   219		    !force_dma_unencrypted(dev)) {
   220			/* cpu_addr is a struct page cookie, not a kernel address */
   221			dma_free_contiguous(dev, cpu_addr, size);
   222			return;
   223		}
   224	
   225		if (IS_ENABLED(CONFIG_DMA_DIRECT_REMAP) &&
   226		    dma_free_from_pool(cpu_addr, PAGE_ALIGN(size)))
   227			return;
   228	
   229		if (force_dma_unencrypted(dev))
   230			set_memory_encrypted((unsigned long)cpu_addr, 1 << page_order);
   231	
   232		if (IS_ENABLED(CONFIG_DMA_REMAP) && is_vmalloc_addr(cpu_addr))
 > 233			vunmap(cpu_addr);
   234	
   235		dma_free_contiguous(dev, dma_direct_to_page(dev, dma_addr), size);
   236	}
   237	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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