diff options
| author | Jan Kara <jack@suse.cz> | 2016-12-14 15:07:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-14 16:04:09 -0800 |
| commit | cae1240257d9ba4b40eb240124c530de8ee349bc (patch) | |
| tree | 8655c822aa48bb1dd03eb229c9e3010a7218006c | |
| parent | a19e25536ed3a20845f642ce531e10c27fb2add5 (diff) | |
| download | linux-cae1240257d9ba4b40eb240124c530de8ee349bc.tar.gz linux-cae1240257d9ba4b40eb240124c530de8ee349bc.tar.bz2 linux-cae1240257d9ba4b40eb240124c530de8ee349bc.zip | |
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>
| -rw-r--r-- | include/linux/mm.h | 2 | ||||
| -rw-r--r-- | mm/memory.c | 4 |
2 files changed, 4 insertions, 2 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, diff --git a/mm/memory.c b/mm/memory.c index 8b7f0656a921..edd899d0decb 100644 --- a/mm/memory.c +++ b/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; |