From: Jan Kara <jack@xxxxxxx> Subject: 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@xxxxxxx Signed-off-by: Jan Kara <jack@xxxxxxx> Reviewed-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx> Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> Cc: Dan Williams <dan.j.williams@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/mm.h | 2 ++ mm/memory.c | 4 ++-- 2 files changed, 4 insertions(+), 2 deletions(-) diff -puN include/linux/mm.h~mm-export-follow_pte include/linux/mm.h --- a/include/linux/mm.h~mm-export-follow_pte +++ a/include/linux/mm.h @@ -1210,6 +1210,8 @@ int copy_page_range(struct mm_struct *ds 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, diff -puN mm/memory.c~mm-export-follow_pte mm/memory.c --- a/mm/memory.c~mm-export-follow_pte +++ a/mm/memory.c @@ -3817,8 +3817,8 @@ out: return -EINVAL; } -static inline int follow_pte(struct mm_struct *mm, unsigned long address, - pte_t **ptepp, spinlock_t **ptlp) +int follow_pte(struct mm_struct *mm, unsigned long address, pte_t **ptepp, + spinlock_t **ptlp) { int res; _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
