[RFC PATCH V1 4/6] mm : export is_cow_mapping()

[wenchaolinux@gmail.com]

From: Wenchao Xia <wenchaolinux@gmail.com>

Signed-off-by: Wenchao Xia <wenchaolinux@gmail.com>
---
 include/linux/mm.h |    1 +
 mm/memory.c        |    2 +-
 2 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 5071a44..9bd01f5 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -965,6 +965,7 @@ void free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
 		unsigned long end, unsigned long floor, unsigned long ceiling);
 void init_rss_vec(int *rss);
 void add_mm_rss_vec(struct mm_struct *mm, int *rss);
+bool is_cow_mapping(vm_flags_t flags);
 unsigned long copy_one_pte(struct mm_struct *dst_mm, struct mm_struct *src_mm,
 			   pte_t *dst_pte, pte_t *src_pte,
 			   unsigned long dst_addr, unsigned long src_addr,
diff --git a/mm/memory.c b/mm/memory.c
index add1562..e5456e1 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -723,7 +723,7 @@ static void print_bad_pte(struct vm_area_struct *vma, unsigned long addr,
 	add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
 }
 
-static inline bool is_cow_mapping(vm_flags_t flags)
+bool is_cow_mapping(vm_flags_t flags)
 {
 	return (flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE;
 }
-- 
1.7.1

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