linux-kernel - [PATCH 2/3] mm/slub: Use node_nr_slabs() instead of slabs

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Message-Id: <20200614123923.99189-3-songmuchun@bytedance.com>
Date:   Sun, 14 Jun 2020 20:39:22 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     cl@...ux.com, penberg@...nel.org, rientjes@...gle.com,
        iamjoonsoo.kim@....com, akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Muchun Song <songmuchun@...edance.com>
Subject: [PATCH 2/3] mm/slub: Use node_nr_slabs() instead of slabs_node()

In the some code, we already get the kmem_cache_node, so we can
use node_nr_slabs() directly instead of slabs_node(). Check the
condition of n->nr_partial can also be removed because we can get
the correct result via node_nr_slabs().

Signed-off-by: Muchun Song <songmuchun@...edance.com>
---
 mm/slub.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index 1a3e6a5b7287..b73505df3de2 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3829,7 +3829,7 @@ bool __kmem_cache_empty(struct kmem_cache *s)
 	struct kmem_cache_node *n;
 
 	for_each_kmem_cache_node(s, node, n)
-		if (n->nr_partial || slabs_node(s, node))
+		if (node_nr_slabs(n))
 			return false;
 	return true;
 }
@@ -3846,7 +3846,7 @@ int __kmem_cache_shutdown(struct kmem_cache *s)
 	/* Attempt to free all objects */
 	for_each_kmem_cache_node(s, node, n) {
 		free_partial(s, n);
-		if (n->nr_partial || slabs_node(s, node))
+		if (node_nr_slabs(n))
 			return 1;
 	}
 	sysfs_slab_remove(s);
@@ -4126,7 +4126,7 @@ int __kmem_cache_shrink(struct kmem_cache *s)
 		list_for_each_entry_safe(page, t, &discard, slab_list)
 			discard_slab(s, page);
 
-		if (slabs_node(s, node))
+		if (node_nr_slabs(n))
 			ret = 1;
 	}
 
@@ -4201,7 +4201,7 @@ static void slab_mem_offline_callback(void *arg)
 			 * and offline_pages() function shouldn't call this
 			 * callback. So, we must fail.
 			 */
-			BUG_ON(slabs_node(s, offline_node));
+			BUG_ON(node_nr_slabs(n));
 
 			s->node[offline_node] = NULL;
 			kmem_cache_free(kmem_cache_node, n);
-- 
2.11.0