Commit 7b24d8616be3 ("mm, hugetlb: fix race in region tracking") has
changed to use a per resv_map spinlock to serialize against any
concurrent write operations to the resv_map, thus we don't need
list_for_each_entry_safe to interate over file_region's any more.
Use list_for_each_entry is enough.
Signed-off-by: Jianyu Zhan <nasa4836@xxxxxxxxx>
---
mm/hugetlb.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index c82290b..26b1464 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -156,7 +156,7 @@ struct file_region {
static long region_add(struct resv_map *resv, long f, long t)
{
struct list_head *head = &resv->regions;
- struct file_region *rg, *nrg, *trg;
+ struct file_region *rg, *nrg;
spin_lock(&resv->lock);
/* Locate the region we are either in or before. */
@@ -170,7 +170,7 @@ static long region_add(struct resv_map *resv, long f, long t)
/* Check for and consume any regions we now overlap with. */
nrg = rg;
- list_for_each_entry_safe(rg, trg, rg->link.prev, link) {
+ list_for_each_entry(rg, rg->link.prev, link) {
if (&rg->link == head)
break;
if (rg->from > t)
@@ -261,7 +261,7 @@ out_nrg:
static long region_truncate(struct resv_map *resv, long end)
{
struct list_head *head = &resv->regions;
- struct file_region *rg, *trg;
+ struct file_region *rg;
long chg = 0;
spin_lock(&resv->lock);
@@ -280,7 +280,7 @@ static long region_truncate(struct resv_map *resv, long end)
}
/* Drop any remaining regions. */
- list_for_each_entry_safe(rg, trg, rg->link.prev, link) {
+ list_for_each_entry(rg, rg->link.prev, link) {
if (&rg->link == head)
break;
chg += rg->to - rg->from;
--
2.0.0-rc3
--
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