linux-kernel - Re: [PATCH 12/12] mm: convert remove_migration_pte() to page_check

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Date:   Wed, 25 Jan 2017 09:54:25 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     kbuild-all@...org, Andrea Arcangeli <aarcange@...hat.com>,
        Hugh Dickins <hughd@...gle.com>,
        Rik van Riel <riel@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH 12/12] mm: convert remove_migration_pte() to
 page_check_walk()

Hi Kirill,

[auto build test WARNING on mmotm/master]
[also build test WARNING on v4.10-rc5 next-20170124]
[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/Kirill-A-Shutemov/Fix-few-rmap-related-THP-bugs/20170125-081918
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: openrisc-or1ksim_defconfig (attached as .config)
compiler: or32-linux-gcc (GCC) 4.5.1-or32-1.0rc1
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=openrisc 

All warnings (new ones prefixed by >>):

   mm/migrate.c: In function 'remove_migration_pte':
>> mm/migrate.c:199:20: warning: unused variable 'mm'
   arch/openrisc/include/asm/bitops/atomic.h: Assembler messages:
   arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:90: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:92: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/cmpxchg.h:30: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/cmpxchg.h:34: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/cmpxchg.h:30: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/cmpxchg.h:34: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/cmpxchg.h:30: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/cmpxchg.h:34: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:70: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:72: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/cmpxchg.h:30: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/cmpxchg.h:34: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/cmpxchg.h:30: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/cmpxchg.h:34: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/cmpxchg.h:30: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/cmpxchg.h:34: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:18: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:20: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/bitops/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/bitops/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.
   arch/openrisc/include/asm/atomic.h:37: Error: unknown opcode2 `l.swa'.
   arch/openrisc/include/asm/atomic.h:35: Error: unknown opcode2 `l.lwa'.

vim +/mm +199 mm/migrate.c

bda807d44 Minchan Kim        2016-07-26  183  			unlock_page(page);
bda807d44 Minchan Kim        2016-07-26  184  			put_page(page);
bda807d44 Minchan Kim        2016-07-26  185  		} else {
894bc3104 Lee Schermerhorn   2008-10-18  186  			putback_lru_page(page);
6afcf8ef0 Ming Ling          2016-12-12  187  			dec_node_page_state(page, NR_ISOLATED_ANON +
6afcf8ef0 Ming Ling          2016-12-12  188  					page_is_file_cache(page));
b20a35035 Christoph Lameter  2006-03-22  189  		}
b20a35035 Christoph Lameter  2006-03-22  190  	}
bda807d44 Minchan Kim        2016-07-26  191  }
b20a35035 Christoph Lameter  2006-03-22  192  
0697212a4 Christoph Lameter  2006-06-23  193  /*
0697212a4 Christoph Lameter  2006-06-23  194   * Restore a potential migration pte to a working pte entry
0697212a4 Christoph Lameter  2006-06-23  195   */
51b4efdf7 Kirill A. Shutemov 2017-01-24  196  static int remove_migration_pte(struct page *page, struct vm_area_struct *vma,
e9995ef97 Hugh Dickins       2009-12-14  197  				 unsigned long addr, void *old)
0697212a4 Christoph Lameter  2006-06-23  198  {
0697212a4 Christoph Lameter  2006-06-23 @199  	struct mm_struct *mm = vma->vm_mm;
51b4efdf7 Kirill A. Shutemov 2017-01-24  200  	struct page_check_walk pcw = {
51b4efdf7 Kirill A. Shutemov 2017-01-24  201  		.page = old,
51b4efdf7 Kirill A. Shutemov 2017-01-24  202  		.vma = vma,
51b4efdf7 Kirill A. Shutemov 2017-01-24  203  		.address = addr,
51b4efdf7 Kirill A. Shutemov 2017-01-24  204  		.flags = PAGE_CHECK_WALK_SYNC | PAGE_CHECK_WALK_MIGRATION,
51b4efdf7 Kirill A. Shutemov 2017-01-24  205  	};
51b4efdf7 Kirill A. Shutemov 2017-01-24  206  	struct page *new;
51b4efdf7 Kirill A. Shutemov 2017-01-24  207  	pte_t pte;

:::::: The code at line 199 was first introduced by commit
:::::: 0697212a411c1dae03c27845f2de2f3adb32c331 [PATCH] Swapless page migration: add R/W migration entries

:::::: TO: Christoph Lameter <clameter@....com>
:::::: CC: Linus Torvalds <torvalds@...osdl.org>

---
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