netdev - [PATCH][net-next][v2] netlink: remove hash::nelems check in netlink

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Message-Id: <1536627901-18256-1-git-send-email-lirongqing@baidu.com>
Date:   Tue, 11 Sep 2018 09:05:01 +0800
From:   Li RongQing <lirongqing@...du.com>
To:     netdev@...r.kernel.org
Subject: [PATCH][net-next][v2] netlink: remove hash::nelems check in netlink_insert

The type of hash::nelems has been changed from size_t to atom_t
which in fact is int, so not need to check if BITS_PER_LONG, that
is bit number of size_t, is bigger than 32

and rht_grow_above_max() will be called to check if hashtable is
too big, ensure it can not bigger than 1<<31

Signed-off-by: Zhang Yu <zhangyu31@...du.com>
Signed-off-by: Li RongQing <lirongqing@...du.com>
---
 net/netlink/af_netlink.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index b4a29bcc33b9..e3a0538ec0be 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -574,11 +574,6 @@ static int netlink_insert(struct sock *sk, u32 portid)
 	if (nlk_sk(sk)->bound)
 		goto err;
 
-	err = -ENOMEM;
-	if (BITS_PER_LONG > 32 &&
-	    unlikely(atomic_read(&table->hash.nelems) >= UINT_MAX))
-		goto err;
-
 	nlk_sk(sk)->portid = portid;
 	sock_hold(sk);
 
-- 
2.16.2