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

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

[Li RongQing]

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@baidu.com>
Signed-off-by: Li RongQing <lirongqing@baidu.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

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

[David Miller]

From: Li RongQing <lirongqing@baidu.com>
Date: Tue, 11 Sep 2018 09:05:01 +0800

> 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@baidu.com>
> Signed-off-by: Li RongQing <lirongqing@baidu.com>

Applied.