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* mm/hugetlb.c:4904:36: error: 'PTRS_PER_PTE' undeclared; did you mean 'PTRS_PER_P4D'?
@ 2020-01-27  3:52 kbuild test robot
  0 siblings, 0 replies; only message in thread
From: kbuild test robot @ 2020-01-27  3:52 UTC (permalink / raw)
  To: Christoph Hellwig; +Cc: kbuild-all, linux-kernel, Paul Walmsley, Anup Patel

[-- Attachment #1: Type: text/plain, Size: 24665 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d5226fa6dbae0569ee43ecfc08bdcd6770fc4755
commit: 6bd33e1ece528f67646db33bf97406b747dafda0 riscv: add nommu support
date:   2 months ago
config: riscv-randconfig-a001-20200127 (attached as .config)
compiler: riscv64-linux-gcc (GCC) 7.5.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 6bd33e1ece528f67646db33bf97406b747dafda0
        # save the attached .config to linux build tree
        GCC_VERSION=7.5.0 make.cross ARCH=riscv 

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

All error/warnings (new ones prefixed by >>):

                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:51,
                    from include/linux/seqlock.h:36,
                    from include/linux/time.h:6,
                    from include/linux/stat.h:19,
                    from include/linux/module.h:10,
                    from init/main.c:17:
   include/linux/highmem.h: In function 'kmap_to_page':
   include/asm-generic/memory_model.h:54:29: error: 'vmemmap' undeclared (first use in this function); did you mean 'vm_mmap'?
    #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                ^
   include/asm-generic/memory_model.h:82:21: note: in expansion of macro '__pfn_to_page'
    #define pfn_to_page __pfn_to_page
                        ^~~~~~~~~~~~~
   arch/riscv/include/asm/page.h:112:30: note: in expansion of macro 'pfn_to_page'
    #define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
                                 ^~~~~~~~~~~
   include/linux/highmem.h:75:9: note: in expansion of macro 'virt_to_page'
     return virt_to_page(addr);
            ^~~~~~~~~~~~
   include/linux/scatterlist.h: In function 'sg_set_buf':
   include/asm-generic/memory_model.h:54:29: error: 'vmemmap' undeclared (first use in this function); did you mean 'vm_mmap'?
    #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                ^
   include/asm-generic/memory_model.h:82:21: note: in expansion of macro '__pfn_to_page'
    #define pfn_to_page __pfn_to_page
                        ^~~~~~~~~~~~~
   arch/riscv/include/asm/page.h:112:30: note: in expansion of macro 'pfn_to_page'
    #define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
                                 ^~~~~~~~~~~
   include/linux/scatterlist.h:145:18: note: in expansion of macro 'virt_to_page'
     sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
                     ^~~~~~~~~~~~
   In file included from arch/riscv/include/asm/page.h:12:0,
                    from arch/riscv/include/asm/thread_info.h:11,
                    from include/linux/thread_info.h:38,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/riscv/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:51,
                    from include/linux/seqlock.h:36,
                    from include/linux/time.h:6,
                    from include/linux/stat.h:19,
                    from include/linux/module.h:10,
                    from init/main.c:17:
   include/linux/scatterlist.h: In function 'sg_phys':
   include/asm-generic/memory_model.h:55:54: error: 'vmemmap' undeclared (first use in this function); did you mean 'vm_mmap'?
    #define __page_to_pfn(page) (unsigned long)((page) - vmemmap)
                                                         ^
   include/linux/pfn.h:21:36: note: in definition of macro 'PFN_PHYS'
    #define PFN_PHYS(x) ((phys_addr_t)(x) << PAGE_SHIFT)
                                       ^
   arch/riscv/include/asm/page.h:115:29: note: in expansion of macro 'pfn_to_phys'
    #define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
                                ^~~~~~~~~~~
   include/asm-generic/memory_model.h:81:21: note: in expansion of macro '__page_to_pfn'
    #define page_to_pfn __page_to_pfn
                        ^~~~~~~~~~~~~
   arch/riscv/include/asm/page.h:115:41: note: in expansion of macro 'page_to_pfn'
    #define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
                                            ^~~~~~~~~~~
   include/linux/scatterlist.h:224:9: note: in expansion of macro 'page_to_phys'
     return page_to_phys(sg_page(sg)) + sg->offset;
            ^~~~~~~~~~~~
   In file included from arch/riscv/include/asm/page.h:131:0,
                    from arch/riscv/include/asm/thread_info.h:11,
                    from include/linux/thread_info.h:38,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/riscv/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:51,
                    from include/linux/seqlock.h:36,
                    from include/linux/time.h:6,
                    from include/linux/stat.h:19,
                    from include/linux/module.h:10,
                    from init/main.c:17:
   include/linux/scatterlist.h: In function 'sg_page_iter_page':
   include/asm-generic/memory_model.h:54:29: error: 'vmemmap' undeclared (first use in this function); did you mean 'vm_mmap'?
    #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                ^
   include/asm-generic/memory_model.h:82:21: note: in expansion of macro '__pfn_to_page'
    #define pfn_to_page __pfn_to_page
                        ^~~~~~~~~~~~~
   include/linux/mm.h:213:26: note: in expansion of macro 'pfn_to_page'
    #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n))
                             ^~~~~~~~~~~
   include/linux/scatterlist.h:384:9: note: in expansion of macro 'nth_page'
     return nth_page(sg_page(piter->sg), piter->sg_pgoffset);
            ^~~~~~~~
   In file included from include/linux/kernel.h:11:0,
                    from include/linux/list.h:9,
                    from include/linux/module.h:9,
                    from init/main.c:17:
   init/main.c: In function 'start_kernel':
   include/asm-generic/memory_model.h:54:29: error: 'vmemmap' undeclared (first use in this function); did you mean 'vm_mmap'?
    #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                ^
   include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var'
    #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                                       ^~~~
>> init/main.c:735:2: note: in expansion of macro 'if'
     if (initrd_start && !initrd_below_start_ok &&
     ^~
   include/asm-generic/memory_model.h:81:21: note: in expansion of macro '__page_to_pfn'
    #define page_to_pfn __page_to_pfn
                        ^~~~~~~~~~~~~
   include/asm-generic/memory_model.h:82:21: note: in expansion of macro '__pfn_to_page'
    #define pfn_to_page __pfn_to_page
                        ^~~~~~~~~~~~~
   arch/riscv/include/asm/page.h:112:30: note: in expansion of macro 'pfn_to_page'
    #define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
                                 ^~~~~~~~~~~
>> init/main.c:736:18: note: in expansion of macro 'virt_to_page'
         page_to_pfn(virt_to_page((void *)initrd_start)) < min_low_pfn) {
                     ^~~~~~~~~~~~
--
     return pte_wrprotect(pte);
            ^~~~~~~~~~~~~~~~~~
   include/asm-generic/hugetlb.h: In function 'huge_ptep_set_wrprotect':
   include/asm-generic/hugetlb.h:109:2: error: implicit declaration of function 'ptep_set_wrprotect'; did you mean 'huge_ptep_set_wrprotect'? [-Werror=implicit-function-declaration]
     ptep_set_wrprotect(mm, addr, ptep);
     ^~~~~~~~~~~~~~~~~~
     huge_ptep_set_wrprotect
   include/asm-generic/hugetlb.h: In function 'huge_ptep_set_access_flags':
   include/asm-generic/hugetlb.h:118:9: error: implicit declaration of function 'ptep_set_access_flags'; did you mean 'huge_ptep_set_access_flags'? [-Werror=implicit-function-declaration]
     return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
            ^~~~~~~~~~~~~~~~~~~~~
            huge_ptep_set_access_flags
   In file included from arch/riscv/include/asm/page.h:131:0,
                    from arch/riscv/include/asm/thread_info.h:11,
                    from include/linux/thread_info.h:38,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/riscv/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:51,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:6,
                    from include/linux/slab.h:15,
                    from kernel/fork.c:16:
   include/linux/scatterlist.h: In function 'sg_set_buf':
   include/asm-generic/memory_model.h:54:29: error: 'vmemmap' undeclared (first use in this function); did you mean 'vm_mmap'?
    #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                ^
   include/asm-generic/memory_model.h:82:21: note: in expansion of macro '__pfn_to_page'
    #define pfn_to_page __pfn_to_page
                        ^~~~~~~~~~~~~
   arch/riscv/include/asm/page.h:112:30: note: in expansion of macro 'pfn_to_page'
    #define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
                                 ^~~~~~~~~~~
   include/linux/scatterlist.h:145:18: note: in expansion of macro 'virt_to_page'
     sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
                     ^~~~~~~~~~~~
   In file included from arch/riscv/include/asm/page.h:12:0,
                    from arch/riscv/include/asm/thread_info.h:11,
                    from include/linux/thread_info.h:38,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/riscv/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:51,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:6,
                    from include/linux/slab.h:15,
                    from kernel/fork.c:16:
   include/linux/scatterlist.h: In function 'sg_phys':
   include/asm-generic/memory_model.h:55:54: error: 'vmemmap' undeclared (first use in this function); did you mean 'vm_mmap'?
    #define __page_to_pfn(page) (unsigned long)((page) - vmemmap)
                                                         ^
   include/linux/pfn.h:21:36: note: in definition of macro 'PFN_PHYS'
    #define PFN_PHYS(x) ((phys_addr_t)(x) << PAGE_SHIFT)
                                       ^
   arch/riscv/include/asm/page.h:115:29: note: in expansion of macro 'pfn_to_phys'
    #define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
                                ^~~~~~~~~~~
   include/asm-generic/memory_model.h:81:21: note: in expansion of macro '__page_to_pfn'
    #define page_to_pfn __page_to_pfn
                        ^~~~~~~~~~~~~
   arch/riscv/include/asm/page.h:115:41: note: in expansion of macro 'page_to_pfn'
    #define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
                                            ^~~~~~~~~~~
   include/linux/scatterlist.h:224:9: note: in expansion of macro 'page_to_phys'
     return page_to_phys(sg_page(sg)) + sg->offset;
            ^~~~~~~~~~~~
   In file included from arch/riscv/include/asm/page.h:131:0,
                    from arch/riscv/include/asm/thread_info.h:11,
                    from include/linux/thread_info.h:38,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/riscv/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:51,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:6,
                    from include/linux/slab.h:15,
                    from kernel/fork.c:16:
   include/linux/scatterlist.h: In function 'sg_page_iter_page':
   include/asm-generic/memory_model.h:54:29: error: 'vmemmap' undeclared (first use in this function); did you mean 'vm_mmap'?
    #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                ^
   include/asm-generic/memory_model.h:82:21: note: in expansion of macro '__pfn_to_page'
    #define pfn_to_page __pfn_to_page
                        ^~~~~~~~~~~~~
   include/linux/mm.h:213:26: note: in expansion of macro 'pfn_to_page'
    #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n))
                             ^~~~~~~~~~~
   include/linux/scatterlist.h:384:9: note: in expansion of macro 'nth_page'
     return nth_page(sg_page(piter->sg), piter->sg_pgoffset);
            ^~~~~~~~
   kernel/fork.c: In function 'free_thread_stack':
   include/asm-generic/memory_model.h:54:29: error: 'vmemmap' undeclared (first use in this function); did you mean 'vm_mmap'?
    #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                ^
   include/asm-generic/memory_model.h:82:21: note: in expansion of macro '__pfn_to_page'
    #define pfn_to_page __pfn_to_page
                        ^~~~~~~~~~~~~
   arch/riscv/include/asm/page.h:112:30: note: in expansion of macro 'pfn_to_page'
    #define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
                                 ^~~~~~~~~~~
>> kernel/fork.c:297:15: note: in expansion of macro 'virt_to_page'
     __free_pages(virt_to_page(tsk->stack), THREAD_SIZE_ORDER);
                  ^~~~~~~~~~~~
   kernel/fork.c: In function 'account_kernel_stack':
   include/asm-generic/memory_model.h:54:29: error: 'vmemmap' undeclared (first use in this function); did you mean 'vm_mmap'?
    #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                ^
   include/asm-generic/memory_model.h:82:21: note: in expansion of macro '__pfn_to_page'
    #define pfn_to_page __pfn_to_page
                        ^~~~~~~~~~~~~
   arch/riscv/include/asm/page.h:112:30: note: in expansion of macro 'pfn_to_page'
    #define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
                                 ^~~~~~~~~~~
   kernel/fork.c:392:29: note: in expansion of macro 'virt_to_page'
      struct page *first_page = virt_to_page(stack);
                                ^~~~~~~~~~~~
   include/linux/dma-mapping.h: In function 'dma_map_single_attrs':
   include/asm-generic/memory_model.h:54:29: error: 'vmemmap' undeclared (first use in this function); did you mean 'vm_mmap'?
    #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                ^
   include/asm-generic/memory_model.h:82:21: note: in expansion of macro '__pfn_to_page'
    #define pfn_to_page __pfn_to_page
                        ^~~~~~~~~~~~~
   arch/riscv/include/asm/page.h:112:30: note: in expansion of macro 'pfn_to_page'
    #define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
                                 ^~~~~~~~~~~
   include/linux/dma-mapping.h:587:33: note: in expansion of macro 'virt_to_page'
     return dma_map_page_attrs(dev, virt_to_page(ptr), offset_in_page(ptr),
                                    ^~~~~~~~~~~~
   In file included from include/linux/dax.h:6:0,
                    from include/linux/mempolicy.h:11,
                    from kernel/fork.c:34:
   include/linux/mm.h: In function 'lowmem_page_address':
   include/linux/mm.h:1322:1: warning: control reaches end of non-void function [-Wreturn-type]
    }
    ^
   cc1: some warnings being treated as errors
--
   In file included from arch/riscv/include/asm/page.h:131:0,
                    from arch/riscv/include/asm/thread_info.h:11,
                    from include/linux/thread_info.h:38,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/riscv/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/radix-tree.h:14,
                    from include/linux/idr.h:15,
                    from include/linux/kernfs.h:13,
                    from include/linux/sysfs.h:16,
                    from include/linux/kobject.h:20,
                    from include/linux/device.h:16,
                    from kernel/iomem.c:2:
   include/linux/mm.h: In function 'virt_to_head_page':
   include/asm-generic/memory_model.h:54:29: error: 'vmemmap' undeclared (first use in this function); did you mean 'mem_map'?
    #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                ^
   include/asm-generic/memory_model.h:82:21: note: in expansion of macro '__pfn_to_page'
    #define pfn_to_page __pfn_to_page
                        ^~~~~~~~~~~~~
   arch/riscv/include/asm/page.h:112:30: note: in expansion of macro 'pfn_to_page'
    #define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
                                 ^~~~~~~~~~~
   include/linux/mm.h:751:22: note: in expansion of macro 'virt_to_page'
     struct page *page = virt_to_page(x);
                         ^~~~~~~~~~~~
   include/asm-generic/memory_model.h:54:29: note: each undeclared identifier is reported only once for each function it appears in
    #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                ^
   include/asm-generic/memory_model.h:82:21: note: in expansion of macro '__pfn_to_page'
    #define pfn_to_page __pfn_to_page
                        ^~~~~~~~~~~~~
   arch/riscv/include/asm/page.h:112:30: note: in expansion of macro 'pfn_to_page'
    #define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
                                 ^~~~~~~~~~~
   include/linux/mm.h:751:22: note: in expansion of macro 'virt_to_page'
     struct page *page = virt_to_page(x);
                         ^~~~~~~~~~~~
   In file included from arch/riscv/include/asm/thread_info.h:11:0,
                    from include/linux/thread_info.h:38,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/riscv/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/radix-tree.h:14,
                    from include/linux/idr.h:15,
                    from include/linux/kernfs.h:13,
                    from include/linux/sysfs.h:16,
                    from include/linux/kobject.h:20,
                    from include/linux/device.h:16,
                    from kernel/iomem.c:2:
   include/linux/mm.h: In function 'lowmem_page_address':
   include/asm-generic/memory_model.h:55:54: error: 'vmemmap' undeclared (first use in this function); did you mean 'mem_map'?
    #define __page_to_pfn(page) (unsigned long)((page) - vmemmap)
                                                         ^
   arch/riscv/include/asm/page.h:104:45: note: in definition of macro '__va'
    #define __va(x)  ((void *)((unsigned long) (x) + va_pa_offset))
                                                ^
   arch/riscv/include/asm/page.h:107:27: note: in expansion of macro 'PFN_PHYS'
    #define pfn_to_phys(pfn) (PFN_PHYS(pfn))
                              ^~~~~~~~
   arch/riscv/include/asm/page.h:110:32: note: in expansion of macro 'pfn_to_phys'
    #define pfn_to_virt(pfn) (__va(pfn_to_phys(pfn)))
                                   ^~~~~~~~~~~
   arch/riscv/include/asm/page.h:113:29: note: in expansion of macro 'pfn_to_virt'
    #define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
                                ^~~~~~~~~~~
   include/asm-generic/memory_model.h:81:21: note: in expansion of macro '__page_to_pfn'
    #define page_to_pfn __page_to_pfn
                        ^~~~~~~~~~~~~
   arch/riscv/include/asm/page.h:113:41: note: in expansion of macro 'page_to_pfn'
    #define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
                                            ^~~~~~~~~~~
   include/linux/mm.h:1321:9: note: in expansion of macro 'page_to_virt'
     return page_to_virt(page);
            ^~~~~~~~~~~~
   In file included from include/linux/ioport.h:13:0,
                    from include/linux/device.h:15,
                    from kernel/iomem.c:2:
   kernel/iomem.c: In function 'try_ram_remap':
   include/asm-generic/memory_model.h:54:29: error: 'vmemmap' undeclared (first use in this function); did you mean 'vm_mmap'?
    #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                ^
   include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var'
    #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                                       ^~~~
>> kernel/iomem.c:36:2: note: in expansion of macro 'if'
     if (pfn_valid(pfn) && !PageHighMem(pfn_to_page(pfn)) &&
     ^~
   include/asm-generic/memory_model.h:82:21: note: in expansion of macro '__pfn_to_page'
    #define pfn_to_page __pfn_to_page
                        ^~~~~~~~~~~~~
>> kernel/iomem.c:36:37: note: in expansion of macro 'pfn_to_page'
     if (pfn_valid(pfn) && !PageHighMem(pfn_to_page(pfn)) &&
                                        ^~~~~~~~~~~
..

vim +4904 mm/hugetlb.c

3212b535f200c8 Steve Capper       2013-04-23  4878  
3212b535f200c8 Steve Capper       2013-04-23  4879  /*
3212b535f200c8 Steve Capper       2013-04-23  4880   * unmap huge page backed by shared pte.
3212b535f200c8 Steve Capper       2013-04-23  4881   *
3212b535f200c8 Steve Capper       2013-04-23  4882   * Hugetlb pte page is ref counted at the time of mapping.  If pte is shared
3212b535f200c8 Steve Capper       2013-04-23  4883   * indicated by page_count > 1, unmap is achieved by clearing pud and
3212b535f200c8 Steve Capper       2013-04-23  4884   * decrementing the ref count. If count == 1, the pte page is not shared.
3212b535f200c8 Steve Capper       2013-04-23  4885   *
ddeaab32a89f04 Mike Kravetz       2019-01-08  4886   * called with page table lock held.
3212b535f200c8 Steve Capper       2013-04-23  4887   *
3212b535f200c8 Steve Capper       2013-04-23  4888   * returns: 1 successfully unmapped a shared pte page
3212b535f200c8 Steve Capper       2013-04-23  4889   *	    0 the underlying pte page is not shared, or it is the last user
3212b535f200c8 Steve Capper       2013-04-23  4890   */
3212b535f200c8 Steve Capper       2013-04-23  4891  int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
3212b535f200c8 Steve Capper       2013-04-23  4892  {
3212b535f200c8 Steve Capper       2013-04-23  4893  	pgd_t *pgd = pgd_offset(mm, *addr);
c2febafc67734a Kirill A. Shutemov 2017-03-09  4894  	p4d_t *p4d = p4d_offset(pgd, *addr);
c2febafc67734a Kirill A. Shutemov 2017-03-09  4895  	pud_t *pud = pud_offset(p4d, *addr);
3212b535f200c8 Steve Capper       2013-04-23  4896  
3212b535f200c8 Steve Capper       2013-04-23 @4897  	BUG_ON(page_count(virt_to_page(ptep)) == 0);
3212b535f200c8 Steve Capper       2013-04-23  4898  	if (page_count(virt_to_page(ptep)) == 1)
3212b535f200c8 Steve Capper       2013-04-23  4899  		return 0;
3212b535f200c8 Steve Capper       2013-04-23  4900  
3212b535f200c8 Steve Capper       2013-04-23  4901  	pud_clear(pud);
3212b535f200c8 Steve Capper       2013-04-23  4902  	put_page(virt_to_page(ptep));
dc6c9a35b66b52 Kirill A. Shutemov 2015-02-11  4903  	mm_dec_nr_pmds(mm);
3212b535f200c8 Steve Capper       2013-04-23 @4904  	*addr = ALIGN(*addr, HPAGE_SIZE * PTRS_PER_PTE) - HPAGE_SIZE;
3212b535f200c8 Steve Capper       2013-04-23  4905  	return 1;
3212b535f200c8 Steve Capper       2013-04-23  4906  }
9e5fc74c302505 Steve Capper       2013-04-30  4907  #define want_pmd_share()	(1)
9e5fc74c302505 Steve Capper       2013-04-30  4908  #else /* !CONFIG_ARCH_WANT_HUGE_PMD_SHARE */
9e5fc74c302505 Steve Capper       2013-04-30  4909  pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud)
9e5fc74c302505 Steve Capper       2013-04-30  4910  {
9e5fc74c302505 Steve Capper       2013-04-30  4911  	return NULL;
9e5fc74c302505 Steve Capper       2013-04-30  4912  }
e81f2d22370f82 Zhang Zhen         2015-06-24  4913  

:::::: The code at line 4904 was first introduced by commit
:::::: 3212b535f200c85b5a67cbfaea18431da71b5c72 mm: hugetlb: Copy huge_pmd_share from x86 to mm.

:::::: TO: Steve Capper <steve.capper@linaro.org>
:::::: CC: Steve Capper <steve.capper@linaro.org>

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

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