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.
Reported-by: Ma Chenggong <[email protected]> Signed-off-by: Liu Xiang <[email protected]> Signed-off-by: Pan Jiagen <[email protected]> --- mm/hugetlb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 37f15c3..293b36d 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1943,7 +1943,7 @@ 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; -- 1.9.1
