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From:   Miaohe Lin <linmiaohe@huawei.com>
To:     <akpm@linux-foundation.org>
CC:     <willy@infradead.org>, <vbabka@suse.cz>, <dhowells@redhat.com>,
        <neilb@suse.de>, <apopple@nvidia.com>, <david@redhat.com>,
        <surenb@google.com>, <peterx@redhat.com>,
        <naoya.horiguchi@nec.com>, <linux-mm@kvack.org>,
        <linux-kernel@vger.kernel.org>, <linmiaohe@huawei.com>
Subject: [PATCH 07/15] mm/swap: remove unneeded p != NULL check in __swap_duplicate
Date:   Mon, 9 May 2022 21:14:08 +0800
Message-ID: <20220509131416.17553-8-linmiaohe@huawei.com>
In-Reply-To: <20220509131416.17553-1-linmiaohe@huawei.com>
References: <20220509131416.17553-1-linmiaohe@huawei.com>
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If p is NULL, __swap_duplicate will already return -EINVAL. So if we
reach here, p must be non-NULL.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
 mm/swapfile.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/swapfile.c b/mm/swapfile.c
index d4b81ca887c0..7b4c99ca2aea 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -3336,8 +3336,7 @@ static int __swap_duplicate(swp_entry_t entry, unsigned char usage)
 
 unlock_out:
 	unlock_cluster_or_swap_info(p, ci);
-	if (p)
-		put_swap_device(p);
+	put_swap_device(p);
 	return err;
 }
 
-- 
2.23.0