netdev - [PATCH net-next] neighbour: use kvzalloc()/kvfree()

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Message-ID: <20241022150059.1345406-1-edumazet@google.com>
Date: Tue, 22 Oct 2024 15:00:59 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, eric.dumazet@...il.com, 
	Eric Dumazet <edumazet@...gle.com>, Gilad Naaman <gnaaman@...venets.com>
Subject: [PATCH net-next] neighbour: use kvzalloc()/kvfree()

mm layer is providing convenient functions, we do not have
to work around old limitations.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Cc: Gilad Naaman <gnaaman@...venets.com>
---
 net/core/neighbour.c | 19 ++-----------------
 1 file changed, 2 insertions(+), 17 deletions(-)

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 395ae1626eef2f22f5b81051671371ed67eb5943..4b871cecd2cee9ccc88e5d29d090c49978cbae9f 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -14,7 +14,6 @@
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/slab.h>
-#include <linux/kmemleak.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -538,14 +537,7 @@ static struct neigh_hash_table *neigh_hash_alloc(unsigned int shift)
 	ret = kmalloc(sizeof(*ret), GFP_ATOMIC);
 	if (!ret)
 		return NULL;
-	if (size <= PAGE_SIZE) {
-		buckets = kzalloc(size, GFP_ATOMIC);
-	} else {
-		buckets = (struct neighbour __rcu **)
-			  __get_free_pages(GFP_ATOMIC | __GFP_ZERO,
-					   get_order(size));
-		kmemleak_alloc(buckets, size, 1, GFP_ATOMIC);
-	}
+	buckets = kvzalloc(size, GFP_ATOMIC);
 	if (!buckets) {
 		kfree(ret);
 		return NULL;
@@ -562,15 +554,8 @@ static void neigh_hash_free_rcu(struct rcu_head *head)
 	struct neigh_hash_table *nht = container_of(head,
 						    struct neigh_hash_table,
 						    rcu);
-	size_t size = (1 << nht->hash_shift) * sizeof(struct neighbour *);
-	struct neighbour __rcu **buckets = nht->hash_buckets;
 
-	if (size <= PAGE_SIZE) {
-		kfree(buckets);
-	} else {
-		kmemleak_free(buckets);
-		free_pages((unsigned long)buckets, get_order(size));
-	}
+	kvfree(nht->hash_buckets);
 	kfree(nht);
 }
 
-- 
2.47.0.105.g07ac214952-goog