netdev - [PATCH net-next] netpoll: warn on netpoll_send

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Date:	Fri, 28 Aug 2015 15:44:25 -0700
From:	Nikolay Aleksandrov <razor@...ckwall.org>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net,
	Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Subject: [PATCH net-next] netpoll: warn on netpoll_send_udp users who haven't disabled irqs

From: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>

Make sure we catch future netpoll_send_udp users who use it without
disabling irqs and also as a hint for poll_controller users.

Signed-off-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
---
 net/core/netpoll.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index c126a878c47c..6aa3db8dfc3b 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -380,6 +380,8 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
 	static atomic_t ip_ident;
 	struct ipv6hdr *ip6h;
 
+	WARN_ON_ONCE(!irqs_disabled());
+
 	udp_len = len + sizeof(*udph);
 	if (np->ipv6)
 		ip_len = udp_len + sizeof(*ip6h);
-- 
2.4.3

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