[intel-gvt-linux:topic/gvt-xengt 5/41] arch/x86//xen/mmu.c:88:8: error: 'remap_area_pfn_pte_fn' undeclared

[kbuild test robot]

tree:   https://github.com/intel/gvt-linux topic/gvt-xengt
head:   20e9d919737ba70122c6760c7c2d635247b77e85
commit: 71dd9631910711527d0946713b28eaad2c99acf2 [5/41] arch/x86/xen: add infrastruction in xen to support gvt
config: x86_64-rhel-7.2-clear (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout 71dd9631910711527d0946713b28eaad2c99acf2
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   arch/x86//xen/mmu.c: In function 'xen_remap_domain_mfn_range_in_kernel':
>> arch/x86//xen/mmu.c:61:20: error: storage size of 'rmd' isn't known
     struct remap_data rmd;
                       ^~~
   arch/x86//xen/mmu.c:62:31: error: 'REMAP_BATCH_SIZE' undeclared (first use in this function); did you mean 'VMACACHE_SIZE'?
     struct mmu_update mmu_update[REMAP_BATCH_SIZE];
                                  ^~~~~~~~~~~~~~~~
                                  VMACACHE_SIZE
   arch/x86//xen/mmu.c:62:31: note: each undeclared identifier is reported only once for each function it appears in
   In file included from arch/x86/include/asm/xen/page.h:5:0,
                    from arch/x86//xen/mmu.c:4:
   include/linux/kernel.h:869:2: error: first argument to '__builtin_choose_expr' not a constant
     __builtin_choose_expr(__safe_cmp(x, y), \
     ^
   include/linux/kernel.h:878:19: note: in expansion of macro '__careful_cmp'
    #define min(x, y) __careful_cmp(x, y, <)
                      ^~~~~~~~~~~~~
   arch/x86//xen/mmu.c:83:11: note: in expansion of macro 'min'
      batch = min(REMAP_BATCH_SIZE, nr);
              ^~~
>> arch/x86//xen/mmu.c:88:8: error: 'remap_area_pfn_pte_fn' undeclared (first use in this function)
           remap_area_pfn_pte_fn, &rmd);
           ^~~~~~~~~~~~~~~~~~~~~
>> arch/x86//xen/mmu.c:96:2: error: implicit declaration of function 'xen_flush_tlb_all'; did you mean '__flush_tlb_global'? [-Werror=implicit-function-declaration]
     xen_flush_tlb_all();
     ^~~~~~~~~~~~~~~~~
     __flush_tlb_global
   arch/x86//xen/mmu.c:62:20: warning: unused variable 'mmu_update' [-Wunused-variable]
     struct mmu_update mmu_update[REMAP_BATCH_SIZE];
                       ^~~~~~~~~~
   arch/x86//xen/mmu.c:61:20: warning: unused variable 'rmd' [-Wunused-variable]
     struct remap_data rmd;
                       ^~~
   arch/x86//xen/mmu.c: In function 'xen_unmap_domain_mfn_range_in_kernel':
   arch/x86//xen/mmu.c:108:20: error: storage size of 'rmd' isn't known
     struct remap_data rmd;
                       ^~~
   arch/x86//xen/mmu.c:126:8: error: 'remap_area_pfn_pte_fn' undeclared (first use in this function)
           remap_area_pfn_pte_fn, &rmd);
           ^~~~~~~~~~~~~~~~~~~~~
   arch/x86//xen/mmu.c:108:20: warning: unused variable 'rmd' [-Wunused-variable]
     struct remap_data rmd;
                       ^~~
   cc1: some warnings being treated as errors

vim +/remap_area_pfn_pte_fn +88 arch/x86//xen/mmu.c

    55	
    56	/* Note: here 'mfn' is actually gfn!!! */
    57	struct vm_struct * xen_remap_domain_mfn_range_in_kernel(unsigned long mfn,
    58			int nr, unsigned domid)
    59	{
    60		struct vm_struct *area;
  > 61		struct remap_data rmd;
    62		struct mmu_update mmu_update[REMAP_BATCH_SIZE];
    63		int batch;
    64		unsigned long range, addr;
    65		pgprot_t prot;
    66		int err;
    67	
    68		WARN_ON(in_interrupt() || irqs_disabled());
    69	
    70		area = alloc_vm_area(nr << PAGE_SHIFT, NULL);
    71		if (!area)
    72			return NULL;
    73	
    74		addr = (unsigned long)area->addr;
    75	
    76		prot = __pgprot(pgprot_val(PAGE_KERNEL));
    77		rmd.pfn = &mfn;
    78		rmd.prot = prot;
    79		rmd.contiguous = true;
    80		rmd.no_translate = false;
    81	
    82		while (nr) {
  > 83			batch = min(REMAP_BATCH_SIZE, nr);
    84			range = (unsigned long)batch << PAGE_SHIFT;
    85	
    86			rmd.mmu_update = mmu_update;
    87			err = apply_to_page_range(&init_mm, addr, range,
  > 88						  remap_area_pfn_pte_fn, &rmd);
    89			if (err || HYPERVISOR_mmu_update(mmu_update, batch, NULL, domid) < 0)
    90				goto err;
    91	
    92			nr -= batch;
    93			addr += range;
    94		}
    95	
  > 96		xen_flush_tlb_all();
    97		return area;
    98	err:
    99		free_vm_area(area);
   100		xen_flush_tlb_all();
   101		return NULL;
   102	}
   103	EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range_in_kernel);
   104	

---
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