From 0a4f3d1bb91cac4efdd780373638b6a1a4c24c51 Mon Sep 17 00:00:00 2001 From: Liu Xiang Date: Mon, 14 Dec 2020 19:12:05 -0800 Subject: [PATCH] mm: hugetlb: fix type of delta parameter and related local variables in gather_surplus_pages() 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(). Link: https://lkml.kernel.org/r/1605793733-3573-1-git-send-email-liu.xiang@zlingsmart.com Reported-by: Ma Chenggong Signed-off-by: Liu Xiang Signed-off-by: Pan Jiagen Reviewed-by: Mike Kravetz Cc: Liu Xiang Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/hugetlb.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 987d4b57ab0d..70ecc1538499 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1944,13 +1944,14 @@ 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; -- 2.11.0