linux-kernel - [PATCH] lru_cache: Initialize hlist_head in lc

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Message-Id: <20240311034401.234854-1-richard120310@gmail.com>
Date: Mon, 11 Mar 2024 11:44:01 +0800
From: I-HSIN CHENG <richard120310@...il.com>
To: philipp.reisner@...bit.com
Cc: lars.ellenberg@...bit.com,
	christoph.boehmwalder@...bit.com,
	drbd-dev@...ts.linbit.com,
	linux-kernel@...r.kernel.org,
	I-HSIN CHENG <richard120310@...il.com>
Subject: [PATCH] lru_cache: Initialize hlist_head in lc_create

Use INIT_HLIST_HEAD to perform the initialization for each pointer to
struct list_head in the variable "slot" to provide more safety and
prevent possible bugs from uninitialized behavior.

Signed-off-by: I-HSIN CHENG <richard120310@...il.com>
---
 lib/lru_cache.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/lru_cache.c b/lib/lru_cache.c
index b3d918761..ae122792e 100644
--- a/lib/lru_cache.c
+++ b/lib/lru_cache.c
@@ -105,6 +105,9 @@ struct lru_cache *lc_create(const char *name, struct kmem_cache *cache,
 	if (!lc)
 		goto out_fail;
 
+	for (int i = 0; i < e_count; i++)
+		INIT_HLIST_HEAD(slot + i);
+
 	INIT_LIST_HEAD(&lc->in_use);
 	INIT_LIST_HEAD(&lc->lru);
 	INIT_LIST_HEAD(&lc->free);
-- 
2.34.1