[RFC,V2,11/37] mm: export mempolicy interfaces to serve dmem allocator

Commit Message

yulei zhang Dec. 7, 2020, 11:31 a.m. UTC

From: Yulei Zhang <[e-mail]>

Export interface interleave_nid() to serve dmem allocator.

Signed-off-by: Yulei Zhang <[e-mail]>
---
 include/linux/mempolicy.h | 3 +++
 mm/mempolicy.c            | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

Patch

diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h
index 5f1c74d..4789661 100644
--- a/include/linux/mempolicy.h
+++ b/include/linux/mempolicy.h
@@ -139,6 +139,9 @@  struct mempolicy *mpol_shared_policy_lookup(struct shared_policy *sp,
 struct mempolicy *get_task_policy(struct task_struct *p);
 struct mempolicy *__get_vma_policy(struct vm_area_struct *vma,
 		unsigned long addr);
+struct mempolicy *get_vma_policy(struct vm_area_struct *vma, unsigned long addr);
+unsigned interleave_nid(struct mempolicy *pol, struct vm_area_struct *vma,
+			unsigned long addr, int shift);
 bool vma_policy_mof(struct vm_area_struct *vma);
 
 extern void numa_default_policy(void);
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 3ca4898..efd80e5 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1813,7 +1813,7 @@  struct mempolicy *__get_vma_policy(struct vm_area_struct *vma,
  * freeing by another task.  It is the caller's responsibility to free the
  * extra reference for shared policies.
  */
-static struct mempolicy *get_vma_policy(struct vm_area_struct *vma,
+struct mempolicy *get_vma_policy(struct vm_area_struct *vma,
 						unsigned long addr)
 {
 	struct mempolicy *pol = __get_vma_policy(vma, addr);
@@ -1978,7 +1978,7 @@  static unsigned offset_il_node(struct mempolicy *pol, unsigned long n)
 }
 
 /* Determine a node number for interleave */
-static inline unsigned interleave_nid(struct mempolicy *pol,
+unsigned interleave_nid(struct mempolicy *pol,
 		 struct vm_area_struct *vma, unsigned long addr, int shift)
 {
 	if (vma) {