[PATCH linux-next] net/core: Remove unused assignment and extra parentheses

[luo penghao]

Although if_info_size is assigned, it has not been used. it should
be deleted.This will cause the double parentheses to be redundant, 
and the inner parentheses should be deleted.

The clang_analyzer complains as follows:

net/core/rtnetlink.c:3806: warning:

Although the value stored to 'if_info_size' is used in the enclosing
expression, the value is never actually read from 'if_info_size'.

Reported-by: Zeal Robot <zealci@xxxxxxxxxx>
Signed-off-by: luo penghao <luo.penghao@xxxxxxxxxx>
---
 net/core/rtnetlink.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 10e2a0e..c218ad0 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -3807,9 +3807,8 @@ struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
 	struct net *net = dev_net(dev);
 	struct sk_buff *skb;
 	int err = -ENOBUFS;
-	size_t if_info_size;
 
-	skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
+	skb = nlmsg_new(if_nlmsg_size(dev, 0), flags);
 	if (skb == NULL)
 		goto errout;
 
-- 
2.15.2