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SubjectRe: [PATCH] mm: kmemleak: Avoid using __va() on addresses that don't have a lowmem mapping
Hi Catalin,

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.8-rc2 next-20160816]
[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/Catalin-Marinas/mm-kmemleak-Avoid-using-__va-on-addresses-that-don-t-have-a-lowmem-mapping/20160816-232733
base: git://git.cmpxchg.org/linux-mmotm.git master
config: tile-tilegx_defconfig (attached as .config)
compiler: tilegx-linux-gcc (GCC) 4.6.2
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=tile

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

In file included from include/linux/kmemleak.h:24:0,
from include/linux/slab.h:117,
from arch/tile/include/asm/pgtable.h:27,
from mm/init-mm.c:9:
include/linux/mm.h: In function 'is_vmalloc_addr':
include/linux/mm.h:486:17: error: 'VMALLOC_START' undeclared (first use in this function)
include/linux/mm.h:486:17: note: each undeclared identifier is reported only once for each function it appears in
include/linux/mm.h:486:41: error: 'VMALLOC_END' undeclared (first use in this function)
include/linux/mm.h: In function 'maybe_mkwrite':
include/linux/mm.h:624:3: error: implicit declaration of function 'pte_mkwrite'
include/linux/mm.h:624:7: error: incompatible types when assigning to type 'pte_t' from type 'int'
In file included from include/linux/kmemleak.h:24:0,
from include/linux/slab.h:117,
from arch/tile/include/asm/pgtable.h:27,
from mm/init-mm.c:9:
include/linux/mm.h: At top level:
>> include/linux/mm.h:1572:39: error: unknown type name 'pud_t'
include/linux/mm.h:1603:1: error: unknown type name 'pud_t'
include/linux/mm.h: In function 'pud_alloc':
include/linux/mm.h:1605:2: error: implicit declaration of function 'pgd_none'
include/linux/mm.h:1606:3: error: implicit declaration of function 'pud_offset'
include/linux/mm.h:1606:7: warning: pointer/integer type mismatch in conditional expression [enabled by default]
include/linux/mm.h: At top level:
include/linux/mm.h:1609:54: error: unknown type name 'pud_t'
include/linux/mm.h: In function 'pte_lockptr':
>> include/linux/mm.h:1648:2: error: implicit declaration of function 'pmd_page'
>> include/linux/mm.h:1648:2: warning: passing argument 1 of 'ptlock_ptr' makes pointer from integer without a cast [enabled by default]
include/linux/mm.h:1640:27: note: expected 'struct page but argument is of type 'int'
include/linux/mm.h: In function 'pgtable_init':
include/linux/mm.h:1690:2: error: implicit declaration of function 'pgtable_cache_init'
In file included from include/linux/kmemleak.h:24:0,
from include/linux/slab.h:117,
from arch/tile/include/asm/pgtable.h:27,
from mm/init-mm.c:9:
include/linux/mm.h: At top level:
include/linux/mm.h:2330:1: error: unknown type name 'pud_t'
include/linux/mm.h:2331:29: error: unknown type name 'pud_t'
In file included from mm/init-mm.c:9:0:
>> arch/tile/include/asm/pgtable.h:66:13: warning: conflicting types for 'pgtable_cache_init' [enabled by default]
include/linux/mm.h:1690:2: note: previous implicit declaration of 'pgtable_cache_init' was here
In file included from arch/tile/include/asm/pgtable_64.h:62:0,
from arch/tile/include/asm/pgtable.h:359,
from mm/init-mm.c:9:
>> include/asm-generic/pgtable-nopud.h:25:19: error: static declaration of 'pgd_none' follows non-static declaration
include/linux/mm.h:1605:10: note: previous implicit declaration of 'pgd_none' was here
>> include/asm-generic/pgtable-nopud.h:38:23: error: conflicting types for 'pud_offset'
include/linux/mm.h:1606:9: note: previous implicit declaration of 'pud_offset' was here
cc1: some warnings being treated as errors

vim +/pud_t +1572 include/linux/mm.h

dc6c9a35 Kirill A. Shutemov 2015-02-11 1566 }
dc6c9a35 Kirill A. Shutemov 2015-02-11 1567
dc6c9a35 Kirill A. Shutemov 2015-02-11 1568 static inline void mm_inc_nr_pmds(struct mm_struct *mm) {}
dc6c9a35 Kirill A. Shutemov 2015-02-11 1569 static inline void mm_dec_nr_pmds(struct mm_struct *mm) {}
dc6c9a35 Kirill A. Shutemov 2015-02-11 1570
5f22df00 Nick Piggin 2007-05-06 1571 #else
1bb3630e Hugh Dickins 2005-10-29 @1572 int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address);
dc6c9a35 Kirill A. Shutemov 2015-02-11 1573
2d2f5119 Kirill A. Shutemov 2015-02-12 1574 static inline void mm_nr_pmds_init(struct mm_struct *mm)
2d2f5119 Kirill A. Shutemov 2015-02-12 1575 {
2d2f5119 Kirill A. Shutemov 2015-02-12 1576 atomic_long_set(&mm->nr_pmds, 0);
2d2f5119 Kirill A. Shutemov 2015-02-12 1577 }
2d2f5119 Kirill A. Shutemov 2015-02-12 1578
dc6c9a35 Kirill A. Shutemov 2015-02-11 1579 static inline unsigned long mm_nr_pmds(struct mm_struct *mm)
dc6c9a35 Kirill A. Shutemov 2015-02-11 1580 {
dc6c9a35 Kirill A. Shutemov 2015-02-11 1581 return atomic_long_read(&mm->nr_pmds);
dc6c9a35 Kirill A. Shutemov 2015-02-11 1582 }
dc6c9a35 Kirill A. Shutemov 2015-02-11 1583
dc6c9a35 Kirill A. Shutemov 2015-02-11 1584 static inline void mm_inc_nr_pmds(struct mm_struct *mm)
dc6c9a35 Kirill A. Shutemov 2015-02-11 1585 {
dc6c9a35 Kirill A. Shutemov 2015-02-11 1586 atomic_long_inc(&mm->nr_pmds);
dc6c9a35 Kirill A. Shutemov 2015-02-11 1587 }
dc6c9a35 Kirill A. Shutemov 2015-02-11 1588
dc6c9a35 Kirill A. Shutemov 2015-02-11 1589 static inline void mm_dec_nr_pmds(struct mm_struct *mm)
dc6c9a35 Kirill A. Shutemov 2015-02-11 1590 {
dc6c9a35 Kirill A. Shutemov 2015-02-11 1591 atomic_long_dec(&mm->nr_pmds);
dc6c9a35 Kirill A. Shutemov 2015-02-11 1592 }
5f22df00 Nick Piggin 2007-05-06 1593 #endif
5f22df00 Nick Piggin 2007-05-06 1594
3ed3a4f0 Kirill A. Shutemov 2016-03-17 1595 int __pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address);
1bb3630e Hugh Dickins 2005-10-29 1596 int __pte_alloc_kernel(pmd_t *pmd, unsigned long address);
1bb3630e Hugh Dickins 2005-10-29 1597
^1da177e Linus Torvalds 2005-04-16 1598 /*
^1da177e Linus Torvalds 2005-04-16 1599 * The following ifdef needed to get the 4level-fixup.h header to work.
^1da177e Linus Torvalds 2005-04-16 1600 * Remove it when 4level-fixup.h has been removed.
^1da177e Linus Torvalds 2005-04-16 1601 */
1bb3630e Hugh Dickins 2005-10-29 1602 #if defined(CONFIG_MMU) && !defined(__ARCH_HAS_4LEVEL_HACK)
^1da177e Linus Torvalds 2005-04-16 @1603 static inline pud_t *pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address)
^1da177e Linus Torvalds 2005-04-16 1604 {
1bb3630e Hugh Dickins 2005-10-29 1605 return (unlikely(pgd_none(*pgd)) && __pud_alloc(mm, pgd, address))?
1bb3630e Hugh Dickins 2005-10-29 1606 NULL: pud_offset(pgd, address);
^1da177e Linus Torvalds 2005-04-16 1607 }
^1da177e Linus Torvalds 2005-04-16 1608
^1da177e Linus Torvalds 2005-04-16 1609 static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address)
^1da177e Linus Torvalds 2005-04-16 1610 {
1bb3630e Hugh Dickins 2005-10-29 1611 return (unlikely(pud_none(*pud)) && __pmd_alloc(mm, pud, address))?
1bb3630e Hugh Dickins 2005-10-29 1612 NULL: pmd_offset(pud, address);
^1da177e Linus Torvalds 2005-04-16 1613 }
1bb3630e Hugh Dickins 2005-10-29 1614 #endif /* CONFIG_MMU && !__ARCH_HAS_4LEVEL_HACK */
1bb3630e Hugh Dickins 2005-10-29 1615
57c1ffce Kirill A. Shutemov 2013-11-14 1616 #if USE_SPLIT_PTE_PTLOCKS
597d795a Kirill A. Shutemov 2013-12-20 1617 #if ALLOC_SPLIT_PTLOCKS
b35f1819 Kirill A. Shutemov 2014-01-21 1618 void __init ptlock_cache_init(void);
539edb58 Peter Zijlstra 2013-11-14 1619 extern bool ptlock_alloc(struct page *page);
539edb58 Peter Zijlstra 2013-11-14 1620 extern void ptlock_free(struct page *page);
539edb58 Peter Zijlstra 2013-11-14 1621
539edb58 Peter Zijlstra 2013-11-14 1622 static inline spinlock_t *ptlock_ptr(struct page *page)
539edb58 Peter Zijlstra 2013-11-14 1623 {
539edb58 Peter Zijlstra 2013-11-14 1624 return page->ptl;
539edb58 Peter Zijlstra 2013-11-14 1625 }
597d795a Kirill A. Shutemov 2013-12-20 1626 #else /* ALLOC_SPLIT_PTLOCKS */
b35f1819 Kirill A. Shutemov 2014-01-21 1627 static inline void ptlock_cache_init(void)
b35f1819 Kirill A. Shutemov 2014-01-21 1628 {
b35f1819 Kirill A. Shutemov 2014-01-21 1629 }
b35f1819 Kirill A. Shutemov 2014-01-21 1630
49076ec2 Kirill A. Shutemov 2013-11-14 1631 static inline bool ptlock_alloc(struct page *page)
49076ec2 Kirill A. Shutemov 2013-11-14 1632 {
49076ec2 Kirill A. Shutemov 2013-11-14 1633 return true;
49076ec2 Kirill A. Shutemov 2013-11-14 1634 }
539edb58 Peter Zijlstra 2013-11-14 1635
49076ec2 Kirill A. Shutemov 2013-11-14 1636 static inline void ptlock_free(struct page *page)
49076ec2 Kirill A. Shutemov 2013-11-14 1637 {
49076ec2 Kirill A. Shutemov 2013-11-14 1638 }
49076ec2 Kirill A. Shutemov 2013-11-14 1639
49076ec2 Kirill A. Shutemov 2013-11-14 1640 static inline spinlock_t *ptlock_ptr(struct page *page)
49076ec2 Kirill A. Shutemov 2013-11-14 1641 {
539edb58 Peter Zijlstra 2013-11-14 1642 return &page->ptl;
49076ec2 Kirill A. Shutemov 2013-11-14 1643 }
597d795a Kirill A. Shutemov 2013-12-20 1644 #endif /* ALLOC_SPLIT_PTLOCKS */
49076ec2 Kirill A. Shutemov 2013-11-14 1645
49076ec2 Kirill A. Shutemov 2013-11-14 1646 static inline spinlock_t *pte_lockptr(struct mm_struct *mm, pmd_t *pmd)
49076ec2 Kirill A. Shutemov 2013-11-14 1647 {
49076ec2 Kirill A. Shutemov 2013-11-14 @1648 return ptlock_ptr(pmd_page(*pmd));
49076ec2 Kirill A. Shutemov 2013-11-14 1649 }
49076ec2 Kirill A. Shutemov 2013-11-14 1650
49076ec2 Kirill A. Shutemov 2013-11-14 1651 static inline bool ptlock_init(struct page *page)

:::::: The code at line 1572 was first introduced by commit
:::::: 1bb3630e89cb8a7b3d3807629c20c5bad88290ff [PATCH] mm: ptd_alloc inline and out

:::::: TO: Hugh Dickins <hugh@veritas.com>
:::::: CC: Linus Torvalds <torvalds@g5.osdl.org>

---
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