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SubjectRe: [PATCH 32/60] block: implement sp version of bvec iterator helpers
Hi Guys,

On Sat, Oct 29, 2016 at 7:06 PM, kbuild test robot <lkp@intel.com> wrote:
> Hi Ming,

Thanks for the report!

>
> [auto build test ERROR on linus/master]
> [also build test ERROR on v4.9-rc2 next-20161028]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> [Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
> [Check https://git-scm.com/docs/git-format-patch for more information]
>
> url: https://github.com/0day-ci/linux/commits/Ming-Lei/block-support-multipage-bvec/20161029-163910
> config: sparc-defconfig (attached as .config)
> compiler: sparc-linux-gcc (GCC) 6.2.0
> 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=sparc
>
> All error/warnings (new ones prefixed by >>):
>
> In file included from arch/sparc/include/asm/oplib.h:6:0,
> from arch/sparc/include/asm/pgtable_32.h:21,
> from arch/sparc/include/asm/pgtable.h:6,
> from include/linux/mm.h:68,


This issue should be caused by somewhere in sparc arch, and this patch
only adds '#include <linux/mm.h>' to 'include/linux/bvec.h' for using
nth_page().

So Cc sparc list.

Thanks,
Ming

> from include/linux/bvec.h:25,
> from include/linux/blk_types.h:9,
> from include/linux/fs.h:31,
> from include/linux/proc_fs.h:8,
> from arch/sparc/include/asm/prom.h:22,
> from include/linux/of.h:232,
> from arch/sparc/include/asm/openprom.h:14,
> from arch/sparc/include/asm/device.h:9,
> from include/linux/device.h:30,
> from include/linux/node.h:17,
> from include/linux/cpu.h:16,
> from include/linux/stop_machine.h:4,
> from kernel/sched/sched.h:10,
> from kernel/sched/loadavg.c:11:
>>> arch/sparc/include/asm/oplib_32.h:105:39: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
> int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
> ^~~~~~~~~~~~~~~~~~~~
> arch/sparc/include/asm/oplib_32.h:168:36: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
> void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
> ^~~~~~~~~~~~~~~~~~~~
> arch/sparc/include/asm/oplib_32.h:172:18: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
> struct linux_prom_registers *sbusregs, int nregs);
> ^~~~~~~~~~~~~~~~~~~~
> --
> In file included from arch/sparc/include/asm/oplib.h:6:0,
> from arch/sparc/include/asm/pgtable_32.h:21,
> from arch/sparc/include/asm/pgtable.h:6,
> from include/linux/mm.h:68,
> from include/linux/bvec.h:25,
> from include/linux/blk_types.h:9,
> from include/linux/fs.h:31,
> from include/linux/proc_fs.h:8,
> from arch/sparc/include/asm/prom.h:22,
> from include/linux/of.h:232,
> from arch/sparc/include/asm/openprom.h:14,
> from arch/sparc/prom/mp.c:12:
>>> arch/sparc/include/asm/oplib_32.h:105:39: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
> int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
> ^~~~~~~~~~~~~~~~~~~~
> arch/sparc/include/asm/oplib_32.h:168:36: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
> void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
> ^~~~~~~~~~~~~~~~~~~~
> arch/sparc/include/asm/oplib_32.h:172:18: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
> struct linux_prom_registers *sbusregs, int nregs);
> ^~~~~~~~~~~~~~~~~~~~
>>> arch/sparc/prom/mp.c:23:1: error: conflicting types for 'prom_startcpu'
> prom_startcpu(int cpunode, struct linux_prom_registers *ctable_reg, int ctx, char *pc)
> ^~~~~~~~~~~~~
> In file included from arch/sparc/include/asm/oplib.h:6:0,
> from arch/sparc/include/asm/pgtable_32.h:21,
> from arch/sparc/include/asm/pgtable.h:6,
> from include/linux/mm.h:68,
> from include/linux/bvec.h:25,
> from include/linux/blk_types.h:9,
> from include/linux/fs.h:31,
> from include/linux/proc_fs.h:8,
> from arch/sparc/include/asm/prom.h:22,
> from include/linux/of.h:232,
> from arch/sparc/include/asm/openprom.h:14,
> from arch/sparc/prom/mp.c:12:
> arch/sparc/include/asm/oplib_32.h:105:5: note: previous declaration of 'prom_startcpu' was here
> int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
> ^~~~~~~~~~~~~
> --
> In file included from arch/sparc/include/asm/oplib.h:6:0,
> from arch/sparc/include/asm/pgtable_32.h:21,
> from arch/sparc/include/asm/pgtable.h:6,
> from include/linux/mm.h:68,
> from include/linux/bvec.h:25,
> from include/linux/blk_types.h:9,
> from include/linux/fs.h:31,
> from include/linux/proc_fs.h:8,
> from arch/sparc/include/asm/prom.h:22,
> from include/linux/of.h:232,
> from arch/sparc/include/asm/openprom.h:14,
> from arch/sparc/prom/ranges.c:11:
>>> arch/sparc/include/asm/oplib_32.h:105:39: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
> int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
> ^~~~~~~~~~~~~~~~~~~~
> arch/sparc/include/asm/oplib_32.h:168:36: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
> void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
> ^~~~~~~~~~~~~~~~~~~~
> arch/sparc/include/asm/oplib_32.h:172:18: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
> struct linux_prom_registers *sbusregs, int nregs);
> ^~~~~~~~~~~~~~~~~~~~
>>> arch/sparc/prom/ranges.c:57:6: error: conflicting types for 'prom_apply_obio_ranges'
> void prom_apply_obio_ranges(struct linux_prom_registers *regs, int nregs)
> ^~~~~~~~~~~~~~~~~~~~~~
> In file included from arch/sparc/include/asm/oplib.h:6:0,
> from arch/sparc/include/asm/pgtable_32.h:21,
> from arch/sparc/include/asm/pgtable.h:6,
> from include/linux/mm.h:68,
> from include/linux/bvec.h:25,
> from include/linux/blk_types.h:9,
> from include/linux/fs.h:31,
> from include/linux/proc_fs.h:8,
> from arch/sparc/include/asm/prom.h:22,
> from include/linux/of.h:232,
> from arch/sparc/include/asm/openprom.h:14,
> from arch/sparc/prom/ranges.c:11:
> arch/sparc/include/asm/oplib_32.h:168:6: note: previous declaration of 'prom_apply_obio_ranges' was here
> void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
> ^~~~~~~~~~~~~~~~~~~~~~
> In file included from include/linux/linkage.h:6:0,
> from include/linux/kernel.h:6,
> from include/linux/list.h:8,
> from include/linux/module.h:9,
> from arch/sparc/prom/ranges.c:9:
> arch/sparc/prom/ranges.c:62:15: error: conflicting types for 'prom_apply_obio_ranges'
> EXPORT_SYMBOL(prom_apply_obio_ranges);
> ^
> include/linux/export.h:58:21: note: in definition of macro '___EXPORT_SYMBOL'
> extern typeof(sym) sym; \
> ^~~
>>> arch/sparc/prom/ranges.c:62:1: note: in expansion of macro 'EXPORT_SYMBOL'
> EXPORT_SYMBOL(prom_apply_obio_ranges);
> ^~~~~~~~~~~~~
> In file included from arch/sparc/include/asm/oplib.h:6:0,
> from arch/sparc/include/asm/pgtable_32.h:21,
> from arch/sparc/include/asm/pgtable.h:6,
> from include/linux/mm.h:68,
> from include/linux/bvec.h:25,
> from include/linux/blk_types.h:9,
> from include/linux/fs.h:31,
> from include/linux/proc_fs.h:8,
> from arch/sparc/include/asm/prom.h:22,
> from include/linux/of.h:232,
> from arch/sparc/include/asm/openprom.h:14,
> from arch/sparc/prom/ranges.c:11:
> arch/sparc/include/asm/oplib_32.h:168:6: note: previous declaration of 'prom_apply_obio_ranges' was here
> void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
> ^~~~~~~~~~~~~~~~~~~~~~
>>> arch/sparc/prom/ranges.c:87:6: error: conflicting types for 'prom_apply_generic_ranges'
> void prom_apply_generic_ranges(phandle node, phandle parent,
> ^~~~~~~~~~~~~~~~~~~~~~~~~
> In file included from arch/sparc/include/asm/oplib.h:6:0,
> from arch/sparc/include/asm/pgtable_32.h:21,
> from arch/sparc/include/asm/pgtable.h:6,
> from include/linux/mm.h:68,
> from include/linux/bvec.h:25,
> from include/linux/blk_types.h:9,
> from include/linux/fs.h:31,
> from include/linux/proc_fs.h:8,
> from arch/sparc/include/asm/prom.h:22,
> from include/linux/of.h:232,
> from arch/sparc/include/asm/openprom.h:14,
> from arch/sparc/prom/ranges.c:11:
> arch/sparc/include/asm/oplib_32.h:171:6: note: previous declaration of 'prom_apply_generic_ranges' was here
> void prom_apply_generic_ranges(phandle node, phandle parent,
> ^~~~~~~~~~~~~~~~~~~~~~~~~
> --
> In file included from include/linux/bvec.h:25:0,
> from include/linux/blk_types.h:9,
> from include/linux/fs.h:31,
> from include/linux/proc_fs.h:8,
> from arch/sparc/include/asm/prom.h:22,
> from include/linux/of.h:232,
> from arch/sparc/include/asm/openprom.h:14,
> from arch/sparc/include/asm/oplib_32.h:11,
> from arch/sparc/include/asm/oplib.h:6,
> from arch/sparc/include/asm/pgtable_32.h:21,
> from arch/sparc/include/asm/pgtable.h:6,
> 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)
> return addr >= VMALLOC_START && addr < VMALLOC_END;
> ^~~~~~~~~~~~~
> 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)
> return addr >= VMALLOC_START && addr < VMALLOC_END;
> ^~~~~~~~~~~
> include/linux/mm.h: In function 'maybe_mkwrite':
>>> include/linux/mm.h:624:9: error: implicit declaration of function 'pte_mkwrite' [-Werror=implicit-function-declaration]
> pte = pte_mkwrite(pte);
> ^~~~~~~~~~~
> In file included from include/linux/bvec.h:25:0,
> from include/linux/blk_types.h:9,
> from include/linux/fs.h:31,
> from include/linux/proc_fs.h:8,
> from arch/sparc/include/asm/prom.h:22,
> from include/linux/of.h:232,
> from arch/sparc/include/asm/openprom.h:14,
> from arch/sparc/include/asm/oplib_32.h:11,
> from arch/sparc/include/asm/oplib.h:6,
> from arch/sparc/include/asm/pgtable_32.h:21,
> from arch/sparc/include/asm/pgtable.h:6,
> from mm/init-mm.c:9:
> include/linux/mm.h: In function 'pgtable_init':
>>> include/linux/mm.h:1674:2: error: implicit declaration of function 'pgtable_cache_init' [-Werror=implicit-function-declaration]
> pgtable_cache_init();
> ^~~~~~~~~~~~~~~~~~
> In file included from arch/sparc/include/asm/pgtable.h:6:0,
> from mm/init-mm.c:9:
> arch/sparc/include/asm/pgtable_32.h: At top level:
>>> arch/sparc/include/asm/pgtable_32.h:245:21: error: conflicting types for 'pte_mkwrite'
> static inline pte_t pte_mkwrite(pte_t pte)
> ^~~~~~~~~~~
> In file included from include/linux/bvec.h:25:0,
> from include/linux/blk_types.h:9,
> from include/linux/fs.h:31,
> from include/linux/proc_fs.h:8,
> from arch/sparc/include/asm/prom.h:22,
> from include/linux/of.h:232,
> from arch/sparc/include/asm/openprom.h:14,
> from arch/sparc/include/asm/oplib_32.h:11,
> from arch/sparc/include/asm/oplib.h:6,
> from arch/sparc/include/asm/pgtable_32.h:21,
> from arch/sparc/include/asm/pgtable.h:6,
> from mm/init-mm.c:9:
> include/linux/mm.h:624:9: note: previous implicit declaration of 'pte_mkwrite' was here
> pte = pte_mkwrite(pte);
> ^~~~~~~~~~~
> cc1: some warnings being treated as errors
>
> vim +/VMALLOC_START +486 include/linux/mm.h
>
> 0738c4bb8 Paul Mundt 2008-03-12 480 */
> bb00a789e Yaowei Bai 2016-05-19 481 static inline bool is_vmalloc_addr(const void *x)
> 9e2779fa2 Christoph Lameter 2008-02-04 482 {
> 0738c4bb8 Paul Mundt 2008-03-12 483 #ifdef CONFIG_MMU
> 9e2779fa2 Christoph Lameter 2008-02-04 484 unsigned long addr = (unsigned long)x;
> 9e2779fa2 Christoph Lameter 2008-02-04 485
> 9e2779fa2 Christoph Lameter 2008-02-04 @486 return addr >= VMALLOC_START && addr < VMALLOC_END;
> 0738c4bb8 Paul Mundt 2008-03-12 487 #else
> bb00a789e Yaowei Bai 2016-05-19 488 return false;
> 8ca3ed87d David Howells 2008-02-23 489 #endif
> 0738c4bb8 Paul Mundt 2008-03-12 490 }
> 81ac3ad90 KAMEZAWA Hiroyuki 2009-09-22 491 #ifdef CONFIG_MMU
> 81ac3ad90 KAMEZAWA Hiroyuki 2009-09-22 492 extern int is_vmalloc_or_module_addr(const void *x);
> 81ac3ad90 KAMEZAWA Hiroyuki 2009-09-22 493 #else
> 934831d06 David Howells 2009-09-24 494 static inline int is_vmalloc_or_module_addr(const void *x)
> 81ac3ad90 KAMEZAWA Hiroyuki 2009-09-22 495 {
> 81ac3ad90 KAMEZAWA Hiroyuki 2009-09-22 496 return 0;
> 81ac3ad90 KAMEZAWA Hiroyuki 2009-09-22 497 }
> 81ac3ad90 KAMEZAWA Hiroyuki 2009-09-22 498 #endif
> 9e2779fa2 Christoph Lameter 2008-02-04 499
> 39f1f78d5 Al Viro 2014-05-06 500 extern void kvfree(const void *addr);
> 39f1f78d5 Al Viro 2014-05-06 501
> 53f9263ba Kirill A. Shutemov 2016-01-15 502 static inline atomic_t *compound_mapcount_ptr(struct page *page)
> 53f9263ba Kirill A. Shutemov 2016-01-15 503 {
> 53f9263ba Kirill A. Shutemov 2016-01-15 504 return &page[1].compound_mapcount;
> 53f9263ba Kirill A. Shutemov 2016-01-15 505 }
> 53f9263ba Kirill A. Shutemov 2016-01-15 506
> 53f9263ba Kirill A. Shutemov 2016-01-15 507 static inline int compound_mapcount(struct page *page)
> 53f9263ba Kirill A. Shutemov 2016-01-15 508 {
> 5f527c2b3 Andrea Arcangeli 2016-05-20 509 VM_BUG_ON_PAGE(!PageCompound(page), page);
> 53f9263ba Kirill A. Shutemov 2016-01-15 510 page = compound_head(page);
> 53f9263ba Kirill A. Shutemov 2016-01-15 511 return atomic_read(compound_mapcount_ptr(page)) + 1;
> 53f9263ba Kirill A. Shutemov 2016-01-15 512 }
> 53f9263ba Kirill A. Shutemov 2016-01-15 513
> ccaafd7fd Joonsoo Kim 2015-02-10 514 /*
> 70b50f94f Andrea Arcangeli 2011-11-02 515 * The atomic page->_mapcount, starts from -1: so that transitions
> 70b50f94f Andrea Arcangeli 2011-11-02 516 * both from it and to it can be tracked, using atomic_inc_and_test
> 70b50f94f Andrea Arcangeli 2011-11-02 517 * and atomic_add_negative(-1).
> 70b50f94f Andrea Arcangeli 2011-11-02 518 */
> 22b751c3d Mel Gorman 2013-02-22 519 static inline void page_mapcount_reset(struct page *page)
> 70b50f94f Andrea Arcangeli 2011-11-02 520 {
> 70b50f94f Andrea Arcangeli 2011-11-02 521 atomic_set(&(page)->_mapcount, -1);
> 70b50f94f Andrea Arcangeli 2011-11-02 522 }
> 70b50f94f Andrea Arcangeli 2011-11-02 523
> b20ce5e03 Kirill A. Shutemov 2016-01-15 524 int __page_mapcount(struct page *page);
> b20ce5e03 Kirill A. Shutemov 2016-01-15 525
> 70b50f94f Andrea Arcangeli 2011-11-02 526 static inline int page_mapcount(struct page *page)
> 70b50f94f Andrea Arcangeli 2011-11-02 527 {
> 1d148e218 Wang, Yalin 2015-02-11 528 VM_BUG_ON_PAGE(PageSlab(page), page);
> 53f9263ba Kirill A. Shutemov 2016-01-15 529
> b20ce5e03 Kirill A. Shutemov 2016-01-15 530 if (unlikely(PageCompound(page)))
> b20ce5e03 Kirill A. Shutemov 2016-01-15 531 return __page_mapcount(page);
> b20ce5e03 Kirill A. Shutemov 2016-01-15 532 return atomic_read(&page->_mapcount) + 1;
> 53f9263ba Kirill A. Shutemov 2016-01-15 533 }
> b20ce5e03 Kirill A. Shutemov 2016-01-15 534
> b20ce5e03 Kirill A. Shutemov 2016-01-15 535 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
> b20ce5e03 Kirill A. Shutemov 2016-01-15 536 int total_mapcount(struct page *page);
> 6d0a07edd Andrea Arcangeli 2016-05-12 537 int page_trans_huge_mapcount(struct page *page, int *total_mapcount);
> b20ce5e03 Kirill A. Shutemov 2016-01-15 538 #else
> b20ce5e03 Kirill A. Shutemov 2016-01-15 539 static inline int total_mapcount(struct page *page)
> b20ce5e03 Kirill A. Shutemov 2016-01-15 540 {
> b20ce5e03 Kirill A. Shutemov 2016-01-15 541 return page_mapcount(page);
> 70b50f94f Andrea Arcangeli 2011-11-02 542 }
> 6d0a07edd Andrea Arcangeli 2016-05-12 543 static inline int page_trans_huge_mapcount(struct page *page,
> 6d0a07edd Andrea Arcangeli 2016-05-12 544 int *total_mapcount)
> 6d0a07edd Andrea Arcangeli 2016-05-12 545 {
> 6d0a07edd Andrea Arcangeli 2016-05-12 546 int mapcount = page_mapcount(page);
> 6d0a07edd Andrea Arcangeli 2016-05-12 547 if (total_mapcount)
> 6d0a07edd Andrea Arcangeli 2016-05-12 548 *total_mapcount = mapcount;
> 6d0a07edd Andrea Arcangeli 2016-05-12 549 return mapcount;
> 6d0a07edd Andrea Arcangeli 2016-05-12 550 }
> b20ce5e03 Kirill A. Shutemov 2016-01-15 551 #endif
> 70b50f94f Andrea Arcangeli 2011-11-02 552
> b49af68ff Christoph Lameter 2007-05-06 553 static inline struct page *virt_to_head_page(const void *x)
> b49af68ff Christoph Lameter 2007-05-06 554 {
> b49af68ff Christoph Lameter 2007-05-06 555 struct page *page = virt_to_page(x);
> ccaafd7fd Joonsoo Kim 2015-02-10 556
> 1d798ca3f Kirill A. Shutemov 2015-11-06 557 return compound_head(page);
> b49af68ff Christoph Lameter 2007-05-06 558 }
> b49af68ff Christoph Lameter 2007-05-06 559
> ddc58f27f Kirill A. Shutemov 2016-01-15 560 void __put_page(struct page *page);
> ddc58f27f Kirill A. Shutemov 2016-01-15 561
> 1d7ea7324 Alexander Zarochentsev 2006-08-13 562 void put_pages_list(struct list_head *pages);
> ^1da177e4 Linus Torvalds 2005-04-16 563
> 8dfcc9ba2 Nick Piggin 2006-03-22 564 void split_page(struct page *page, unsigned int order);
> 8dfcc9ba2 Nick Piggin 2006-03-22 565
> ^1da177e4 Linus Torvalds 2005-04-16 566 /*
> 33f2ef89f Andy Whitcroft 2006-12-06 567 * Compound pages have a destructor function. Provide a
> 33f2ef89f Andy Whitcroft 2006-12-06 568 * prototype for that function and accessor functions.
> f1e61557f Kirill A. Shutemov 2015-11-06 569 * These are _only_ valid on the head of a compound page.
> 33f2ef89f Andy Whitcroft 2006-12-06 570 */
> f1e61557f Kirill A. Shutemov 2015-11-06 571 typedef void compound_page_dtor(struct page *);
> f1e61557f Kirill A. Shutemov 2015-11-06 572
> f1e61557f Kirill A. Shutemov 2015-11-06 573 /* Keep the enum in sync with compound_page_dtors array in mm/page_alloc.c */
> f1e61557f Kirill A. Shutemov 2015-11-06 574 enum compound_dtor_id {
> f1e61557f Kirill A. Shutemov 2015-11-06 575 NULL_COMPOUND_DTOR,
> f1e61557f Kirill A. Shutemov 2015-11-06 576 COMPOUND_PAGE_DTOR,
> f1e61557f Kirill A. Shutemov 2015-11-06 577 #ifdef CONFIG_HUGETLB_PAGE
> f1e61557f Kirill A. Shutemov 2015-11-06 578 HUGETLB_PAGE_DTOR,
> f1e61557f Kirill A. Shutemov 2015-11-06 579 #endif
> 9a982250f Kirill A. Shutemov 2016-01-15 580 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
> 9a982250f Kirill A. Shutemov 2016-01-15 581 TRANSHUGE_PAGE_DTOR,
> 9a982250f Kirill A. Shutemov 2016-01-15 582 #endif
> f1e61557f Kirill A. Shutemov 2015-11-06 583 NR_COMPOUND_DTORS,
> f1e61557f Kirill A. Shutemov 2015-11-06 584 };
> f1e61557f Kirill A. Shutemov 2015-11-06 585 extern compound_page_dtor * const compound_page_dtors[];
> 33f2ef89f Andy Whitcroft 2006-12-06 586
> 33f2ef89f Andy Whitcroft 2006-12-06 587 static inline void set_compound_page_dtor(struct page *page,
> f1e61557f Kirill A. Shutemov 2015-11-06 588 enum compound_dtor_id compound_dtor)
> 33f2ef89f Andy Whitcroft 2006-12-06 589 {
> f1e61557f Kirill A. Shutemov 2015-11-06 590 VM_BUG_ON_PAGE(compound_dtor >= NR_COMPOUND_DTORS, page);
> f1e61557f Kirill A. Shutemov 2015-11-06 591 page[1].compound_dtor = compound_dtor;
> 33f2ef89f Andy Whitcroft 2006-12-06 592 }
> 33f2ef89f Andy Whitcroft 2006-12-06 593
> 33f2ef89f Andy Whitcroft 2006-12-06 594 static inline compound_page_dtor *get_compound_page_dtor(struct page *page)
> 33f2ef89f Andy Whitcroft 2006-12-06 595 {
> f1e61557f Kirill A. Shutemov 2015-11-06 596 VM_BUG_ON_PAGE(page[1].compound_dtor >= NR_COMPOUND_DTORS, page);
> f1e61557f Kirill A. Shutemov 2015-11-06 597 return compound_page_dtors[page[1].compound_dtor];
> 33f2ef89f Andy Whitcroft 2006-12-06 598 }
> 33f2ef89f Andy Whitcroft 2006-12-06 599
> d00181b96 Kirill A. Shutemov 2015-11-06 600 static inline unsigned int compound_order(struct page *page)
> d85f33855 Christoph Lameter 2007-05-06 601 {
> 6d7779538 Christoph Lameter 2007-05-06 602 if (!PageHead(page))
> d85f33855 Christoph Lameter 2007-05-06 603 return 0;
> e4b294c2d Kirill A. Shutemov 2015-02-11 604 return page[1].compound_order;
> d85f33855 Christoph Lameter 2007-05-06 605 }
> d85f33855 Christoph Lameter 2007-05-06 606
> f1e61557f Kirill A. Shutemov 2015-11-06 607 static inline void set_compound_order(struct page *page, unsigned int order)
> d85f33855 Christoph Lameter 2007-05-06 608 {
> e4b294c2d Kirill A. Shutemov 2015-02-11 609 page[1].compound_order = order;
> d85f33855 Christoph Lameter 2007-05-06 610 }
> d85f33855 Christoph Lameter 2007-05-06 611
> 9a982250f Kirill A. Shutemov 2016-01-15 612 void free_compound_page(struct page *page);
> 9a982250f Kirill A. Shutemov 2016-01-15 613
> 3dece370e Michal Simek 2011-01-21 614 #ifdef CONFIG_MMU
> 33f2ef89f Andy Whitcroft 2006-12-06 615 /*
> 14fd403f2 Andrea Arcangeli 2011-01-13 616 * Do pte_mkwrite, but only if the vma says VM_WRITE. We do this when
> 14fd403f2 Andrea Arcangeli 2011-01-13 617 * servicing faults for write access. In the normal case, do always want
> 14fd403f2 Andrea Arcangeli 2011-01-13 618 * pte_mkwrite. But get_user_pages can cause write faults for mappings
> 14fd403f2 Andrea Arcangeli 2011-01-13 619 * that do not have writing enabled, when used by access_process_vm.
> 14fd403f2 Andrea Arcangeli 2011-01-13 620 */
> 14fd403f2 Andrea Arcangeli 2011-01-13 621 static inline pte_t maybe_mkwrite(pte_t pte, struct vm_area_struct *vma)
> 14fd403f2 Andrea Arcangeli 2011-01-13 622 {
> 14fd403f2 Andrea Arcangeli 2011-01-13 623 if (likely(vma->vm_flags & VM_WRITE))
> 14fd403f2 Andrea Arcangeli 2011-01-13 @624 pte = pte_mkwrite(pte);
> 14fd403f2 Andrea Arcangeli 2011-01-13 625 return pte;
> 14fd403f2 Andrea Arcangeli 2011-01-13 626 }
> 8c6e50b02 Kirill A. Shutemov 2014-04-07 627
>
> :::::: The code at line 486 was first introduced by commit
> :::::: 9e2779fa281cfda13ac060753d674bbcaa23367e is_vmalloc_addr(): Check if an address is within the vmalloc boundaries
>
> :::::: TO: Christoph Lameter <clameter@sgi.com>
> :::::: CC: Linus Torvalds <torvalds@woody.linux-foundation.org>
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation



--
Ming Lei

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