From 6a98dcf032106eceb6827e0a7cc667250683f762 Mon Sep 17 00:00:00 2001 From: Amerigo Wang Date: Thu, 7 Feb 2013 15:52:40 +0000 Subject: [PATCH] ipv6: fix a RCU warning in net/ipv6/ip6_flowlabel.c This patch fixes the following RCU warning: [ 51.680236] =============================== [ 51.681914] [ INFO: suspicious RCU usage. ] [ 51.683610] 3.8.0-rc6-next-20130206-sasha-00028-g83214f7-dirty #276 Tainted: G W [ 51.686703] ------------------------------- [ 51.688281] net/ipv6/ip6_flowlabel.c:671 suspicious rcu_dereference_check() usage! we should use rcu_dereference_bh() when we hold rcu_read_lock_bh(). Reported-by: Sasha Levin Cc: David S. Miller Cc: YOSHIFUJI Hideaki Signed-off-by: Cong Wang Signed-off-by: David S. Miller --- net/ipv6/ip6_flowlabel.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c index ea42bf4..a7da2f4 100644 --- a/net/ipv6/ip6_flowlabel.c +++ b/net/ipv6/ip6_flowlabel.c @@ -65,13 +65,13 @@ static DEFINE_SPINLOCK(ip6_fl_lock); static DEFINE_SPINLOCK(ip6_sk_fl_lock); #define for_each_fl_rcu(hash, fl) \ - for (fl = rcu_dereference(fl_ht[(hash)]); \ + for (fl = rcu_dereference_bh(fl_ht[(hash)]); \ fl != NULL; \ - fl = rcu_dereference(fl->next)) + fl = rcu_dereference_bh(fl->next)) #define for_each_fl_continue_rcu(fl) \ - for (fl = rcu_dereference(fl->next); \ + for (fl = rcu_dereference_bh(fl->next); \ fl != NULL; \ - fl = rcu_dereference(fl->next)) + fl = rcu_dereference_bh(fl->next)) #define for_each_sk_fl_rcu(np, sfl) \ for (sfl = rcu_dereference_bh(np->ipv6_fl_list); \ -- 2.7.4