netdev - [PATCH] wireguard: queueing: Fix implicit type conversion

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Message-Id: <1635469664-1708957-1-git-send-email-jiasheng@iscas.ac.cn>
Date:   Fri, 29 Oct 2021 01:07:44 +0000
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     Jason@...c4.com, davem@...emloft.net, kuba@...nel.org
Cc:     wireguard@...ts.zx2c4.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] wireguard: queueing: Fix implicit type conversion

The parameter 'cpu' is defined as unsigned int.
However in the cpumask_next() it is implicitly type conversed
to int.
It is universally accepted that the implicit type conversion is
terrible.
Also, having the good programming custom will set an example for
others.
Thus, it might be better to change the type of 'cpu' from
unsigned int to int.

Fixes: e7096c1 ("net: WireGuard secure network tunnel")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/net/wireguard/queueing.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireguard/queueing.h b/drivers/net/wireguard/queueing.h
index 4ef2944..64f397f 100644
--- a/drivers/net/wireguard/queueing.h
+++ b/drivers/net/wireguard/queueing.h
@@ -106,7 +106,7 @@ static inline void wg_reset_packet(struct sk_buff *skb, bool encapsulating)
 
 static inline int wg_cpumask_choose_online(int *stored_cpu, unsigned int id)
 {
-	unsigned int cpu = *stored_cpu, cpu_index, i;
+	int cpu = *stored_cpu, cpu_index, i;
 
 	if (unlikely(cpu == nr_cpumask_bits ||
 		     !cpumask_test_cpu(cpu, cpu_online_mask))) {
-- 
2.7.4