linux-kernel - [PATCH] mm,slab_common: use list_for_each_entry in dump_unreclaimable

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Date:   Sat, 26 Sep 2020 12:34:40 +0800
From:   Hui Su <sh_def@....com>
To:     cl@...ux.com, penberg@...nel.org, rientjes@...gle.com,
        iamjoonsoo.kim@....com, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH] mm,slab_common: use list_for_each_entry in
 dump_unreclaimable_slab()

dump_unreclaimable_slab() acquires the slab_mutex first,
and it won't remove any slab_caches list entry when
itering the slab_caches lists.

Thus, we do not need list_for_each_entry_safe here,
which is against removal of list entry.

Signed-off-by: Hui Su <sh_def@....com>
---
 mm/slab_common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/slab_common.c b/mm/slab_common.c
index f9ccd5dc13f3..0cd2821b7066 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -978,7 +978,7 @@ static int slab_show(struct seq_file *m, void *p)
 
 void dump_unreclaimable_slab(void)
 {
-	struct kmem_cache *s, *s2;
+	struct kmem_cache *s;
 	struct slabinfo sinfo;
 
 	/*
@@ -996,7 +996,7 @@ void dump_unreclaimable_slab(void)
 	pr_info("Unreclaimable slab info:\n");
 	pr_info("Name                      Used          Total\n");
 
-	list_for_each_entry_safe(s, s2, &slab_caches, list) {
+	list_for_each_entry(s, &slab_caches, list) {
 		if (s->flags & SLAB_RECLAIM_ACCOUNT)
 			continue;
 
-- 
2.25.1