linux-kernel - [PATCH] jbd2: set to NULL after kmem_cache

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Date:   Mon,  5 Feb 2018 21:39:17 +0800
From:   Wang Long <wanglong19@...tuan.com>
To:     tytso@....edu, jack@...e.com
Cc:     linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        wanglong19@...tuan.com
Subject: [PATCH] jbd2: set to NULL after kmem_cache_destroy

Signed-off-by: Wang Long <wanglong19@...tuan.com>
---
 fs/jbd2/journal.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 93016bb..38dc24c 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -2649,11 +2649,14 @@ static int __init jbd2_journal_init_handle_cache(void)
 
 static void jbd2_journal_destroy_handle_cache(void)
 {
-	if (jbd2_handle_cache)
+	if (jbd2_handle_cache) {
 		kmem_cache_destroy(jbd2_handle_cache);
-	if (jbd2_inode_cache)
+		jbd2_handle_cache = NULL;
+	}
+	if (jbd2_inode_cache) {
 		kmem_cache_destroy(jbd2_inode_cache);
-
+		jbd2_inode_cache = NULL;
+	}
 }
 
 /*
-- 
1.8.3.1