[PATCH -next] mm: use helper function put_resv_map()

[Ruan Jinjie <ruanjinjie@huawei.com>]

This code is already duplicated 3 times, use helper function
put_resv_map() to release reserved and allocated regions instead of
open code it to help improve code readability a bit.

No functional change involved.

Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com>
---
 mm/hugetlb.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index e327a5a7602c..bf1c900b753b 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1100,6 +1100,11 @@ void resv_map_release(struct kref *ref)
 	kfree(resv_map);
 }
 
+static inline int put_resv_map(struct resv_map *resv)
+{
+	return kref_put(&resv->refs, resv_map_release);
+}
+
 static inline struct resv_map *inode_resv_map(struct inode *inode)
 {
 	/*
@@ -1201,7 +1206,7 @@ void clear_vma_resv_huge_pages(struct vm_area_struct *vma)
 
 	if (reservations && is_vma_resv_set(vma, HPAGE_RESV_OWNER)) {
 		resv_map_put_hugetlb_cgroup_uncharge_info(reservations);
-		kref_put(&reservations->refs, resv_map_release);
+		put_resv_map(reservations);
 	}
 
 	hugetlb_dup_vma_private(vma);
@@ -4905,7 +4910,7 @@ static void hugetlb_vm_op_close(struct vm_area_struct *vma)
 		hugetlb_acct_memory(h, -gbl_reserve);
 	}
 
-	kref_put(&resv->refs, resv_map_release);
+	put_resv_map(resv);
 }
 
 static int hugetlb_vm_op_split(struct vm_area_struct *vma, unsigned long addr)
@@ -6850,7 +6855,7 @@ bool hugetlb_reserve_pages(struct inode *inode,
 		if (chg >= 0 && add < 0)
 			region_abort(resv_map, from, to, regions_needed);
 	if (vma && is_vma_resv_set(vma, HPAGE_RESV_OWNER))
-		kref_put(&resv_map->refs, resv_map_release);
+		put_resv_map(resv_map);
 	return false;
 }
 
-- 
2.34.1