[PATCH] ipv6: mcast: Add __must_hold() annotations.

[Brent Pappas <bpappas@pappasbrent.com>]

Add __must_hold(RCU) annotations to igmp6_mc_get_first(),
igmp6_mc_get_next(), and igmp6_mc_get_idx() to signify that they are
meant to be called in RCU critical sections.

Signed-off-by: Brent Pappas <bpappas@pappasbrent.com>
---
 net/ipv6/mcast.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 7ba01d8cfbae..843d0d065242 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -22,6 +22,7 @@
  *		- MLDv2 support
  */
 
+#include "linux/compiler_types.h"
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/types.h>
@@ -2861,6 +2862,7 @@ struct igmp6_mc_iter_state {
 #define igmp6_mc_seq_private(seq)	((struct igmp6_mc_iter_state *)(seq)->private)
 
 static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
+	__must_hold(RCU)
 {
 	struct ifmcaddr6 *im = NULL;
 	struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
@@ -2882,7 +2884,9 @@ static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
 	return im;
 }
 
-static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
+static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq,
+					   struct ifmcaddr6 *im)
+	__must_hold(RCU)
 {
 	struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
 
@@ -2902,6 +2906,7 @@ static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr
 }
 
 static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
+	__must_hold(RCU)
 {
 	struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
 	if (im)
-- 
2.46.0