From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 14 Sep 2016 17:57:03 +0200
Subject: [PATCH] fs/dcache: init in_lookup_hashtable
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.8/older/patches-4.8.14-rt9.tar.xz

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.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 fs/dcache.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -3601,6 +3601,11 @@ 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();
 }