The "rcu_dereference()" call is used directly in a condition.
Since its return value is never dereferenced it is recommended to use
"rcu_access_pointer()" instead of "rcu_dereference()".
Therefore, this patch makes the replacement.
The following Coccinelle semantic patch was used:
@@
@@
(
if(
(<+...
- rcu_dereference
+ rcu_access_pointer
(...)
...+>)) {...}
|
while(
(<+...
- rcu_dereference
+ rcu_access_pointer
(...)
...+>)) {...}
)
Signed-off-by: Andreea-Cristina Bernat <[email protected]>
---
net/ipv4/igmp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 6748d42..94a96ad 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -2537,7 +2537,7 @@ static int igmp_mc_seq_show(struct seq_file *seq, void *v)
querier = "NONE";
#endif
- if (rcu_dereference(state->in_dev->mc_list) == im) {
+ if (rcu_access_pointer(state->in_dev->mc_list) == im) {
seq_printf(seq, "%d\t%-10s: %5d %7s\n",
state->dev->ifindex, state->dev->name,
state->in_dev->mc_count, querier);
}
--
1.9.1
--
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