[PATCH v3 2/3] kernel/notifier.c: remove notifier_chain_cond_register()

[Xiaoming Ni]

The only difference between notifier_chain_cond_register() and
notifier_chain_register() is the lack of warning hints for duplicate
registrations.
Consider using notifier_chain_register() instead of
notifier_chain_cond_register() to avoid duplicate code

Signed-off-by: Xiaoming Ni <nixiaom...@huawei.com>
---
 kernel/notifier.c | 17 +----------------
 1 file changed, 1 insertion(+), 16 deletions(-)

diff --git a/kernel/notifier.c b/kernel/notifier.c
index 30bedb8..e3d221f 100644
--- a/kernel/notifier.c
+++ b/kernel/notifier.c
@@ -36,21 +36,6 @@ static int notifier_chain_register(struct notifier_block 
**nl,
        return 0;
 }
 
-static int notifier_chain_cond_register(struct notifier_block **nl,
-               struct notifier_block *n)
-{
-       while ((*nl) != NULL) {
-               if ((*nl) == n)
-                       return 0;
-               if (n->priority > (*nl)->priority)
-                       break;
-               nl = &((*nl)->next);
-       }
-       n->next = *nl;
-       rcu_assign_pointer(*nl, n);
-       return 0;
-}
-
 static int notifier_chain_unregister(struct notifier_block **nl,
                struct notifier_block *n)
 {
@@ -252,7 +237,7 @@ int blocking_notifier_chain_cond_register(struct 
blocking_notifier_head *nh,
        int ret;
 
        down_write(&nh->rwsem);
-       ret = notifier_chain_cond_register(&nh->head, n);
+       ret = notifier_chain_register(&nh->head, n);
        up_write(&nh->rwsem);
        return ret;
 }
-- 
1.8.5.6