linux-kernel - [PATCH] mm: hugetlb: checking for IS

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Date:   Tue, 1 Jun 2021 12:25:40 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Mike Kravetz <mike.kravetz@...cle.com>,
        Mina Almasry <almasrymina@...gle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] mm: hugetlb: checking for IS_ERR() instead of NULL

The alloc_migrate_huge_page() doesn't return error pointers, it returns
NULL.

Fixes: ab45bc8b5910 ("mm, hugetlb: fix resv_huge_pages underflow on UFFDIO_COPY")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 mm/hugetlb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 69a4b551c157..3221c94b4749 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -5103,7 +5103,7 @@ int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm,
 			 */
 			page = alloc_migrate_huge_page(h, gfp_mask, node,
 						       nodemask);
-			if (IS_ERR(page)) {
+			if (!page) {
 				ret = -ENOMEM;
 				goto out;
 			}
-- 
2.30.2