Now that region_del() exists, the region_truncate() routine can be
removed.  Callers of region_truncate are changed to call region_del
instead with a ending value of -1.

Signed-off-by: Mike Kravetz <mike.krav...@oracle.com>
---
 mm/hugetlb.c | 37 +------------------------------------
 1 file changed, 1 insertion(+), 36 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 31e36cd..60a4f21 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -328,41 +328,6 @@ retry:
        return chg;
 }
 
-static long region_truncate(struct resv_map *resv, long end)
-{
-       struct list_head *head = &resv->regions;
-       struct file_region *rg, *trg;
-       long chg = 0;
-
-       spin_lock(&resv->lock);
-       /* Locate the region we are either in or before. */
-       list_for_each_entry(rg, head, link)
-               if (end <= rg->to)
-                       break;
-       if (&rg->link == head)
-               goto out;
-
-       /* If we are in the middle of a region then adjust it. */
-       if (end > rg->from) {
-               chg = rg->to - end;
-               rg->to = end;
-               rg = list_entry(rg->link.next, typeof(*rg), link);
-       }
-
-       /* Drop any remaining regions. */
-       list_for_each_entry_safe(rg, trg, rg->link.prev, link) {
-               if (&rg->link == head)
-                       break;
-               chg += rg->to - rg->from;
-               list_del(&rg->link);
-               kfree(rg);
-       }
-
-out:
-       spin_unlock(&resv->lock);
-       return chg;
-}
-
 static long region_count(struct resv_map *resv, long f, long t)
 {
        struct list_head *head = &resv->regions;
@@ -494,7 +459,7 @@ void resv_map_release(struct kref *ref)
        struct resv_map *resv_map = container_of(ref, struct resv_map, refs);
 
        /* Clear out any active regions before we release the map. */
-       region_truncate(resv_map, 0);
+       region_del(resv_map, 0, -1);
        kfree(resv_map);
 }
 
-- 
2.1.0

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