tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: d397246adc001ee5235f32de10db112ad23175df
commit: 0d84be787c23f75dba61dca3390c6060ae50d26f [102/250] mm: move get_user_pages()-related code to separate file
config: make ARCH=parisc c8000_defconfig
All warnings:
In file included from arch/parisc/include/asm/bitops.h:213:0,
from include/linux/bitops.h:33,
from include/linux/kernel.h:10,
from arch/parisc/include/asm/bug.h:4,
from include/linux/bug.h:4,
from include/linux/thread_info.h:11,
from include/asm-generic/preempt.h:4,
from arch/parisc/include/generated/asm/preempt.h:1,
from include/linux/preempt.h:18,
from include/linux/spinlock.h:50,
from include/linux/mm_types.h:8,
from include/linux/hugetlb.h:4,
from mm/gup.c:1:
include/asm-generic/bitops/__fls.h: In function '__fls':
include/asm-generic/bitops/__fls.h:17:2: warning: left shift count >= width of type [enabled by default]
include/asm-generic/bitops/__fls.h:19:3: warning: left shift count >= width of type [enabled by default]
include/asm-generic/bitops/__fls.h:22:2: warning: left shift count >= width of type [enabled by default]
include/asm-generic/bitops/__fls.h:26:2: warning: left shift count >= width of type [enabled by default]
include/asm-generic/bitops/__fls.h:30:2: warning: left shift count >= width of type [enabled by default]
include/asm-generic/bitops/__fls.h:34:2: warning: left shift count >= width of type [enabled by default]
include/asm-generic/bitops/__fls.h:38:2: warning: left shift count >= width of type [enabled by default]
In file included from mm/gup.c:1:0:
include/linux/hugetlb.h: In function 'hugepages_supported':
include/linux/hugetlb.h:468:9: error: 'HPAGE_SHIFT' undeclared (first use in this function)
include/linux/hugetlb.h:468:9: note: each undeclared identifier is reported only once for each function it appears in
mm/gup.c: In function 'follow_page_mask':
>> mm/gup.c:43:2: warning: right shift count >= width of type [enabled by default]
mm/gup.c:163:3: error: implicit declaration of function 'trylock_page' [-Werror=implicit-function-declaration]
mm/gup.c:172:4: error: implicit declaration of function 'unlock_page' [-Werror=implicit-function-declaration]
mm/gup.c: In function '__get_user_pages':
>> mm/gup.c:307:5: warning: right shift count >= width of type [enabled by default]
>> mm/gup.c:309:5: warning: right shift count >= width of type [enabled by default]
mm/gup.c:441:5: error: implicit declaration of function 'flush_anon_page' [-Werror=implicit-function-declaration]
mm/gup.c:442:5: error: implicit declaration of function 'flush_dcache_page' [-Werror=implicit-function-declaration]
mm/gup.c: In function 'get_dump_page':
mm/gup.c:611:2: error: implicit declaration of function 'flush_cache_page' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
vim +43 mm/gup.c
0d84be78 Kirill A. Shutemov 2014-04-23 @1 #include <linux/hugetlb.h>
0d84be78 Kirill A. Shutemov 2014-04-23 2 #include <linux/mm.h>
0d84be78 Kirill A. Shutemov 2014-04-23 3 #include <linux/rmap.h>
0d84be78 Kirill A. Shutemov 2014-04-23 4 #include <linux/swap.h>
0d84be78 Kirill A. Shutemov 2014-04-23 5 #include <linux/swapops.h>
0d84be78 Kirill A. Shutemov 2014-04-23 6
0d84be78 Kirill A. Shutemov 2014-04-23 7 #include "internal.h"
0d84be78 Kirill A. Shutemov 2014-04-23 8
0d84be78 Kirill A. Shutemov 2014-04-23 9 /**
0d84be78 Kirill A. Shutemov 2014-04-23 10 * follow_page_mask - look up a page descriptor from a user-virtual address
0d84be78 Kirill A. Shutemov 2014-04-23 11 * @vma: vm_area_struct mapping @address
0d84be78 Kirill A. Shutemov 2014-04-23 12 * @address: virtual address to look up
0d84be78 Kirill A. Shutemov 2014-04-23 13 * @flags: flags modifying lookup behaviour
0d84be78 Kirill A. Shutemov 2014-04-23 14 * @page_mask: on output, *page_mask is set according to the size of the page
0d84be78 Kirill A. Shutemov 2014-04-23 15 *
0d84be78 Kirill A. Shutemov 2014-04-23 16 * @flags can have FOLL_ flags set, defined in <linux/mm.h>
0d84be78 Kirill A. Shutemov 2014-04-23 17 *
0d84be78 Kirill A. Shutemov 2014-04-23 18 * Returns the mapped (struct page *), %NULL if no mapping exists, or
0d84be78 Kirill A. Shutemov 2014-04-23 19 * an error pointer if there is a mapping to something not represented
0d84be78 Kirill A. Shutemov 2014-04-23 20 * by a page descriptor (see also vm_normal_page()).
0d84be78 Kirill A. Shutemov 2014-04-23 21 */
0d84be78 Kirill A. Shutemov 2014-04-23 22 struct page *follow_page_mask(struct vm_area_struct *vma,
0d84be78 Kirill A. Shutemov 2014-04-23 23 unsigned long address, unsigned int flags,
0d84be78 Kirill A. Shutemov 2014-04-23 24 unsigned int *page_mask)
0d84be78 Kirill A. Shutemov 2014-04-23 25 {
0d84be78 Kirill A. Shutemov 2014-04-23 26 pgd_t *pgd;
0d84be78 Kirill A. Shutemov 2014-04-23 27 pud_t *pud;
0d84be78 Kirill A. Shutemov 2014-04-23 28 pmd_t *pmd;
0d84be78 Kirill A. Shutemov 2014-04-23 29 pte_t *ptep, pte;
0d84be78 Kirill A. Shutemov 2014-04-23 30 spinlock_t *ptl;
0d84be78 Kirill A. Shutemov 2014-04-23 31 struct page *page;
0d84be78 Kirill A. Shutemov 2014-04-23 32 struct mm_struct *mm = vma->vm_mm;
0d84be78 Kirill A. Shutemov 2014-04-23 33
0d84be78 Kirill A. Shutemov 2014-04-23 34 *page_mask = 0;
0d84be78 Kirill A. Shutemov 2014-04-23 35
0d84be78 Kirill A. Shutemov 2014-04-23 36 page = follow_huge_addr(mm, address, flags & FOLL_WRITE);
0d84be78 Kirill A. Shutemov 2014-04-23 37 if (!IS_ERR(page)) {
0d84be78 Kirill A. Shutemov 2014-04-23 38 BUG_ON(flags & FOLL_GET);
0d84be78 Kirill A. Shutemov 2014-04-23 39 goto out;
0d84be78 Kirill A. Shutemov 2014-04-23 40 }
0d84be78 Kirill A. Shutemov 2014-04-23 41
0d84be78 Kirill A. Shutemov 2014-04-23 42 page = NULL;
0d84be78 Kirill A. Shutemov 2014-04-23 @43 pgd = pgd_offset(mm, address);
0d84be78 Kirill A. Shutemov 2014-04-23 44 if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd)))
0d84be78 Kirill A. Shutemov 2014-04-23 45 goto no_page_table;
0d84be78 Kirill A. Shutemov 2014-04-23 46
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