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authorJan Kara <jack@suse.cz>2016-12-14 15:07:45 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-14 16:04:09 -0800
commitcae1240257d9ba4b40eb240124c530de8ee349bc (patch)
tree8655c822aa48bb1dd03eb229c9e3010a7218006c /include
parenta19e25536ed3a20845f642ce531e10c27fb2add5 (diff)
downloadlinux-cae1240257d9ba4b40eb240124c530de8ee349bc.tar.bz2
mm: export follow_pte()
DAX will need to implement its own version of page_check_address(). To avoid duplicating page table walking code, export follow_pte() which does what we need. Link: http://lkml.kernel.org/r/1479460644-25076-18-git-send-email-jack@suse.cz Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index cec967e93f95..63926492c06a 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1210,6 +1210,8 @@ int copy_page_range(struct mm_struct *dst, struct mm_struct *src,
struct vm_area_struct *vma);
void unmap_mapping_range(struct address_space *mapping,
loff_t const holebegin, loff_t const holelen, int even_cows);
+int follow_pte(struct mm_struct *mm, unsigned long address, pte_t **ptepp,
+ spinlock_t **ptlp);
int follow_pfn(struct vm_area_struct *vma, unsigned long address,
unsigned long *pfn);
int follow_phys(struct vm_area_struct *vma, unsigned long address,