linux-ext4 - [PATCH] ext4: Fix unnecessary hold lock when judge jinode in ext4_inode_attach

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Date:   Sat, 22 Aug 2020 17:25:44 +0800
From:   Ye Bin <yebin10@...wei.com>
To:     <adilger.kernel@...ger.ca>, <tytso@....edu>,
        <linux-ext4@...r.kernel.org>, <yebin10@...wei.com>
Subject: [PATCH] ext4: Fix unnecessary hold lock when judge jinode in ext4_inode_attach_jinode

Signed-off-by: Ye Bin <yebin10@...wei.com>
---
 fs/ext4/inode.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 3a196d81f594..3504b4cec5b8 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4100,12 +4100,11 @@ int ext4_inode_attach_jinode(struct inode *inode)
 		return 0;
 
 	jinode = jbd2_alloc_inode(GFP_KERNEL);
+	if (!jinode)
+		return -ENOMEM;
+
 	spin_lock(&inode->i_lock);
 	if (!ei->jinode) {
-		if (!jinode) {
-			spin_unlock(&inode->i_lock);
-			return -ENOMEM;
-		}
 		ei->jinode = jinode;
 		jbd2_journal_init_jbd_inode(ei->jinode, inode);
 		jinode = NULL;
-- 
2.25.4