[PATCH v2] net/sock: Update sk rcu iterator macro.

From: Tim Hansen
Date: Mon Oct 23 2017 - 11:39:35 EST


Mark hlist nodes in sk rcu iterator as protected by the rcu.
hlist_next_rcu accomplishes this and silences the warnings
sparse throws for net/ipv4/udp.c and net/ipv6/udp.c.

Found with make C=1 net/ipv4/udp.o on linux-next tag
next-20171009.

Signed-off-by: Tim Hansen <devtimhansen@xxxxxxxxx>
---
include/net/sock.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/net/sock.h b/include/net/sock.h
index 64e5ac41b9cf..96cb7b7e4924 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -737,10 +737,10 @@ static inline void sk_add_bind_node(struct sock *sk,
*
*/
#define sk_for_each_entry_offset_rcu(tpos, pos, head, offset) \
- for (pos = rcu_dereference((head)->first); \
+ for (pos = rcu_dereference(hlist_next_rcu((head)->first)); \
pos != NULL && \
({ tpos = (typeof(*tpos) *)((void *)pos - offset); 1;}); \
- pos = rcu_dereference(pos->next))
+ pos = rcu_dereference(hlist_next_rcu(pos->next)))

static inline struct user_namespace *sk_user_ns(struct sock *sk)
{
--
2.15.0.rc0