Re: [HMM 08/15] mm/ZONE_DEVICE: special case put_page() for device private pages

From: kbuild test robot <lkp@intel.com>
To: "Jérôme Glisse" <jglisse@redhat.com>
Cc: kbuild-all@01.org, akpm@linux-foundation.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	John Hubbard <jhubbard@nvidia.com>,
	David Nellans <dnellans@nvidia.com>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Ross Zwisler <ross.zwisler@linux.intel.com>
Subject: Re: [HMM 08/15] mm/ZONE_DEVICE: special case put_page() for device private pages
Date: Tue, 23 May 2017 17:34:50 +0800	[thread overview]
Message-ID: <201705231741.OdCAYrIu%fengguang.wu@intel.com> (raw)
In-Reply-To: <20170522165206.6284-9-jglisse@redhat.com>

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Hi Jerome,

[auto build test ERROR on mmotm/master]
[also build test ERROR on next-20170523]
[cannot apply to v4.12-rc2]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/J-r-me-Glisse/HMM-Heterogeneous-Memory-Management-v22/20170523-153623
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: xtensa-allmodconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 4.9.0
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=xtensa 

All errors (new ones prefixed by >>):

   In file included from include/linux/mm.h:26:0,
                    from include/linux/pid_namespace.h:6,
                    from include/linux/ptrace.h:9,
                    from arch/xtensa/kernel/asm-offsets.c:21:
>> include/linux/memremap.h:97:5: error: unknown type name 'pmd_t'
        pmd_t *pmdp);
        ^
>> include/linux/memremap.h:112:2: error: unknown type name 'dev_page_fault_t'
     dev_page_fault_t page_fault;
     ^
   make[2]: *** [arch/xtensa/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [sub-make] Error 2

vim +/pmd_t +97 include/linux/memremap.h

637316dc Jerome Glisse 2017-05-22   91   * This allows the device driver to implement its own memory management.)
637316dc Jerome Glisse 2017-05-22   92   */
637316dc Jerome Glisse 2017-05-22   93  typedef int (*dev_page_fault_t)(struct vm_area_struct *vma,
637316dc Jerome Glisse 2017-05-22   94  				unsigned long addr,
637316dc Jerome Glisse 2017-05-22   95  				struct page *page,
637316dc Jerome Glisse 2017-05-22   96  				unsigned int flags,
637316dc Jerome Glisse 2017-05-22  @97  				pmd_t *pmdp);
637316dc Jerome Glisse 2017-05-22   98  typedef void (*dev_page_free_t)(struct page *page, void *data);
637316dc Jerome Glisse 2017-05-22   99  
9476df7d Dan Williams  2016-01-15  100  /**
9476df7d Dan Williams  2016-01-15  101   * struct dev_pagemap - metadata for ZONE_DEVICE mappings
637316dc Jerome Glisse 2017-05-22  102   * @page_fault: callback when CPU fault on an unaddressable device page
637316dc Jerome Glisse 2017-05-22  103   * @page_free: free page callback when page refcount reaches 1
4b94ffdc Dan Williams  2016-01-15  104   * @altmap: pre-allocated/reserved memory for vmemmap allocations
5c2c2587 Dan Williams  2016-01-15  105   * @res: physical address range covered by @ref
5c2c2587 Dan Williams  2016-01-15  106   * @ref: reference count that pins the devm_memremap_pages() mapping
9476df7d Dan Williams  2016-01-15  107   * @dev: host device of the mapping for debug
637316dc Jerome Glisse 2017-05-22  108   * @data: private data pointer for page_free()
637316dc Jerome Glisse 2017-05-22  109   * @type: memory type: see MEMORY_* in memory_hotplug.h
9476df7d Dan Williams  2016-01-15  110   */
9476df7d Dan Williams  2016-01-15  111  struct dev_pagemap {
637316dc Jerome Glisse 2017-05-22 @112  	dev_page_fault_t page_fault;
637316dc Jerome Glisse 2017-05-22  113  	dev_page_free_t page_free;
4b94ffdc Dan Williams  2016-01-15  114  	struct vmem_altmap *altmap;
4b94ffdc Dan Williams  2016-01-15  115  	const struct resource *res;

:::::: The code at line 97 was first introduced by commit
:::::: 637316dc095146524a922f5429b0b78840bede2d mm/ZONE_DEVICE: new type of ZONE_DEVICE for unaddressable memory v2

:::::: TO: Jerome Glisse <jglisse@redhat.com>
:::::: CC: 0day robot <fengguang.wu@intel.com>

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