Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

[firefly-linux-kernel-4.4.55.git] / mm / hugetlb.c

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 9e3fa71b1e1817e4dc9963a52a4090f3f8fa2d08..ef6963b577fd2920c1a4857f7b74b50e91c98b7a 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -372,8 +372,10 @@ retry_locked:
                spin_unlock(&resv->lock);
 
                trg = kmalloc(sizeof(*trg), GFP_KERNEL);
-               if (!trg)
+               if (!trg) {
+                       kfree(nrg);
                        return -ENOMEM;
+               }
 
                spin_lock(&resv->lock);
                list_add(&trg->link, &resv->region_cache);
@@ -483,8 +485,16 @@ static long region_del(struct resv_map *resv, long f, long t)
 retry:
        spin_lock(&resv->lock);
        list_for_each_entry_safe(rg, trg, head, link) {
-               if (rg->to <= f)
+               /*
+                * Skip regions before the range to be deleted.  file_region
+                * ranges are normally of the form [from, to).  However, there
+                * may be a "placeholder" entry in the map which is of the form
+                * (from, to) with from == to.  Check for placeholder entries
+                * at the beginning of the range to be deleted.
+                */
+               if (rg->to <= f && (rg->to != rg->from || rg->to != f))
                        continue;
+
                if (rg->from >= t)
                        break;