On 64-bit machine, delta variable in hugetlb_acct_memory() may be larger
than 0xffffffff, but gather_surplus_pages() can only use the low 32-bit
value now. So we need to fix type of delta parameter and related local
variables in gather_surplus_pages().
Reported-by: Ma Chenggong <ma.chenggong@xxxxxxxxxxxxxx>
Signed-off-by: Liu Xiang <liu.xiang@xxxxxxxxxxxxxx>
Signed-off-by: Pan Jiagen <pan.jiagen@xxxxxxxxxxxxxx>
---
Changes in v2:
as suggested by Mike, apply the same fix to the related local
variables in gather_surplus_pages().
---
---
mm/hugetlb.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 37f15c3..3797401 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1943,13 +1943,14 @@ struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma,
* Increase the hugetlb pool such that it can accommodate a reservation
* of size 'delta'.
*/
-static int gather_surplus_pages(struct hstate *h, int delta)
+static int gather_surplus_pages(struct hstate *h, long delta)
__must_hold(&hugetlb_lock)
{
struct list_head surplus_list;
struct page *page, *tmp;
- int ret, i;
- int needed, allocated;
+ int ret;
+ long i;
+ long needed, allocated;
bool alloc_ok = true;
needed = (h->resv_huge_pages + delta) - h->free_huge_pages;
--
1.9.1
