[PATCH 17/20] mm: Export follow_pte()
From: Jan Kara <jack@suse.cz>
Date: 2016-09-27 16:08:21
Also in:
linux-fsdevel, nvdimm
Subsystem:
memory management, memory management - core, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
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. Signed-off-by: Jan Kara <jack@suse.cz> --- include/linux/mm.h | 2 ++ mm/memory.c | 4 ++-- 2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index e5a014be8932..133fabe4bb4c 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h@@ -1224,6 +1224,8 @@ 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 8c8cb7f2133e..e7a4a30a5e88 100644
--- a/mm/memory.c
+++ b/mm/memory.c@@ -3763,8 +3763,8 @@ 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;
--
2.6.6
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