linux-kernel - [PATCH] fs/dcache: init in_lookup

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Message-Id: <20170627161911.30388-1-bigeasy@linutronix.de>
Date:   Tue, 27 Jun 2017 18:19:11 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     viro@...iv.linux.org.uk
Cc:     tglx@...utronix.de, linux-kernel@...r.kernel.org,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        linux-fsdevel@...r.kernel.org
Subject: [PATCH] fs/dcache: init in_lookup_hashtable

in_lookup_hashtable was introduced in commit 94bdd655caba ("parallel
lookups machinery, part 3") and never initialized but since it is in
the data it is all zeros. But we need this for -RT.

Cc: Alexander Viro <viro@...iv.linux.org.uk>
Cc: linux-fsdevel@...r.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 fs/dcache.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/dcache.c b/fs/dcache.c
index a9f995f6859e..b85da8897ffa 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -3608,6 +3608,11 @@ EXPORT_SYMBOL(d_genocide);
 
 void __init vfs_caches_init_early(void)
 {
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(in_lookup_hashtable); i++)
+		INIT_HLIST_BL_HEAD(&in_lookup_hashtable[i]);
+
 	dcache_init_early();
 	inode_init_early();
 }
-- 
2.13.1