55 lines
1.6 KiB
Diff
55 lines
1.6 KiB
Diff
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Date: Wed, 13 Sep 2017 12:32:34 +0200
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Subject: [PATCH] fs/dcache: bring back explicit INIT_HLIST_BL_HEAD init
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.18/older/patches-4.18.5-rt3.tar.xz
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Commit 3d375d78593c ("mm: update callers to use HASH_ZERO flag") removed
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INIT_HLIST_BL_HEAD and uses the ZERO flag instead for the init. However
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on RT we have also a spinlock which needs an init call so we can't use
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that.
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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fs/dcache.c | 11 +++++++++++
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1 file changed, 11 insertions(+)
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--- a/fs/dcache.c
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+++ b/fs/dcache.c
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@@ -3115,6 +3115,8 @@ static int __init set_dhash_entries(char
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static void __init dcache_init_early(void)
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{
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+ unsigned int loop;
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+
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/* If hashes are distributed across NUMA nodes, defer
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* hash allocation until vmalloc space is available.
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*/
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@@ -3131,11 +3133,16 @@ static void __init dcache_init_early(voi
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NULL,
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0,
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0);
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+
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+ for (loop = 0; loop < (1U << d_hash_shift); loop++)
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+ INIT_HLIST_BL_HEAD(dentry_hashtable + loop);
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+
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d_hash_shift = 32 - d_hash_shift;
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}
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static void __init dcache_init(void)
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{
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+ unsigned int loop;
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/*
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* A constructor could be added for stable state like the lists,
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* but it is probably not worth it because of the cache nature
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@@ -3159,6 +3166,10 @@ static void __init dcache_init(void)
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NULL,
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0,
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0);
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+
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+ for (loop = 0; loop < (1U << d_hash_shift); loop++)
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+ INIT_HLIST_BL_HEAD(dentry_hashtable + loop);
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+
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d_hash_shift = 32 - d_hash_shift;
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}
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