linux-kernel - [PATCH 2/4] mm/hugeltb: simplify the return code of __vma_reservation

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Message-ID: <20210402093249.25137-3-linmiaohe@huawei.com>
Date:   Fri, 2 Apr 2021 05:32:47 -0400
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>, <mike.kravetz@...cle.com>
CC:     <n-horiguchi@...jp.nec.com>, <hillf.zj@...baba-inc.com>,
        <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH 2/4] mm/hugeltb: simplify the return code of __vma_reservation_common()

It's guaranteed that the vma is associated with a resv_map, i.e. either
VM_MAYSHARE or HPAGE_RESV_OWNER, when the code reaches here or we would
have returned via !resv check above. So ret must be less than 0 in the
'else' case. Simplify the return code to make this clear.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 mm/hugetlb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index a03a50b7c410..b7864abded3d 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2183,7 +2183,7 @@ static long __vma_reservation_common(struct hstate *h,
 			return 1;
 	}
 	else
-		return ret < 0 ? ret : 0;
+		return ret;
 }
 
 static long vma_needs_reservation(struct hstate *h,
-- 
2.19.1