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Date:   Fri, 20 Dec 2019 20:43:52 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Christoph Hellwig <hch@....de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Anup Patel <anup@...infault.org>
Subject: include/asm-generic/memory_model.h:54:29: error: 'vmemmap'
 undeclared; did you mean 'mem_map'?

Hi Christoph,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   7e0165b2f1a912a06e381e91f0f4e495f4ac3736
commit: 6bd33e1ece528f67646db33bf97406b747dafda0 riscv: add nommu support
date:   5 weeks ago
config: riscv-randconfig-a001-20191220 (attached as .config)
compiler: riscv32-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@...el.com>

All errors (new ones prefixed by >>):

   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:
   arch/riscv/include/asm/pgtable.h: In function 'pmd_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/pgtable.h:134:9: note: in expansion of macro 'pfn_to_page'
     return pfn_to_page(pmd_val(pmd) >> _PAGE_PFN_SHIFT);
            ^~~~~~~~~~~
   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/pgtable.h:134:9: note: in expansion of macro 'pfn_to_page'
     return pfn_to_page(pmd_val(pmd) >> _PAGE_PFN_SHIFT);
            ^~~~~~~~~~~
   In file included from include/linux/perf_event.h:25:0,
                    from include/linux/trace_events.h:10,
                    from include/trace/syscall.h:7,
                    from include/linux/syscalls.h:85,
                    from init/main.c:21:
   arch/riscv/include/asm/perf_event.h: At top level:
   arch/riscv/include/asm/perf_event.h:26:2: error: #error "Please provide a valid RISCV_MAX_COUNTERS for the PMU."
    #error "Please provide a valid RISCV_MAX_COUNTERS for the PMU."
     ^~~~~
   arch/riscv/include/asm/perf_event.h:54:28: error: 'RISCV_MAX_COUNTERS' undeclared here (not in a function); did you mean 'RISCV_BASE_COUNTERS'?
     struct perf_event *events[RISCV_MAX_COUNTERS];
                               ^~~~~~~~~~~~~~~~~~
                               RISCV_BASE_COUNTERS
--
   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/rcupdate.h:27,
                    from include/linux/init_task.h:5,
                    from init/init_task.c:2:
   arch/riscv/include/asm/pgtable.h: In function 'pmd_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/pgtable.h:134:9: note: in expansion of macro 'pfn_to_page'
     return pfn_to_page(pmd_val(pmd) >> _PAGE_PFN_SHIFT);
            ^~~~~~~~~~~
   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/pgtable.h:134:9: note: in expansion of macro 'pfn_to_page'
     return pfn_to_page(pmd_val(pmd) >> _PAGE_PFN_SHIFT);
            ^~~~~~~~~~~
--
   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/wait.h:9,
                    from include/linux/wait_bit.h:8,
                    from include/linux/fs.h:6,
                    from mm/shmem.c:24:
   arch/riscv/include/asm/pgtable.h: In function 'pmd_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/pgtable.h:134:9: note: in expansion of macro 'pfn_to_page'
     return pfn_to_page(pmd_val(pmd) >> _PAGE_PFN_SHIFT);
            ^~~~~~~~~~~
   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/pgtable.h:134:9: note: in expansion of macro 'pfn_to_page'
     return pfn_to_page(pmd_val(pmd) >> _PAGE_PFN_SHIFT);
            ^~~~~~~~~~~
   In file included from include/linux/perf_event.h:25:0,
                    from include/linux/trace_events.h:10,
                    from include/trace/syscall.h:7,
                    from include/linux/syscalls.h:85,
                    from mm/shmem.c:77:
   arch/riscv/include/asm/perf_event.h: At top level:
   arch/riscv/include/asm/perf_event.h:26:2: error: #error "Please provide a valid RISCV_MAX_COUNTERS for the PMU."
    #error "Please provide a valid RISCV_MAX_COUNTERS for the PMU."
     ^~~~~
   arch/riscv/include/asm/perf_event.h:54:28: error: 'RISCV_MAX_COUNTERS' undeclared here (not in a function); did you mean 'RISCV_BASE_COUNTERS'?
     struct perf_event *events[RISCV_MAX_COUNTERS];
                               ^~~~~~~~~~~~~~~~~~
                               RISCV_BASE_COUNTERS
   In file included from include/linux/mm.h:99:0,
                    from include/linux/pagemap.h:8,
                    from mm/shmem.c:29:
   arch/riscv/include/asm/pgtable.h: In function 'pmd_page':
   arch/riscv/include/asm/pgtable.h:135:1: warning: control reaches end of non-void function [-Wreturn-type]
    }
    ^
--
   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 mm/gup.c:5:
   arch/riscv/include/asm/pgtable.h: In function 'pmd_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/pgtable.h:134:9: note: in expansion of macro 'pfn_to_page'
     return pfn_to_page(pmd_val(pmd) >> _PAGE_PFN_SHIFT);
            ^~~~~~~~~~~
   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/pgtable.h:134:9: note: in expansion of macro 'pfn_to_page'
     return pfn_to_page(pmd_val(pmd) >> _PAGE_PFN_SHIFT);
            ^~~~~~~~~~~
   In file included from include/linux/mm.h:99:0,
                    from mm/gup.c:7:
   arch/riscv/include/asm/pgtable.h:135:1: warning: control reaches end of non-void function [-Wreturn-type]
    }
    ^

vim +54 include/asm-generic/memory_model.h

8f6aac419bd590 Christoph Lameter  2007-10-16  52  
af901ca181d92a André Goddard Rosa 2009-11-14  53  /* memmap is virtually contiguous.  */
8f6aac419bd590 Christoph Lameter  2007-10-16 @54  #define __pfn_to_page(pfn)	(vmemmap + (pfn))
32272a26974d20 Martin Schwidefsky 2008-12-25  55  #define __page_to_pfn(page)	(unsigned long)((page) - vmemmap)
8f6aac419bd590 Christoph Lameter  2007-10-16  56  

:::::: The code at line 54 was first introduced by commit
:::::: 8f6aac419bd590f535fb110875a51f7db2b62b5b Generic Virtual Memmap support for SPARSEMEM

:::::: TO: Christoph Lameter <clameter@....com>
:::::: CC: Linus Torvalds <torvalds@...dy.linux-foundation.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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