s390: Convert call_rcu() to kfree_rcu(), drop ext_int_hash_update()

The call_rcu() in unregister_external_interrupt() invokes
ext_int_hash_update(), which just does a kfree().  Convert the
call_rcu() to kfree_rcu(), allowing ext_int_hash_update() to
be eliminated.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>

1 files changed, 1 insertions, 8 deletions

diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index b9a7fdd9c814..e30b2dfa8ba0 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -165,13 +165,6 @@ static inline int ext_hash(u16 code)
         return (code + (code >> 9)) & 0xff;
 }
 
-static void ext_int_hash_update(struct rcu_head *head)
-{
-        struct ext_int_info *p = container_of(head, struct ext_int_info, rcu);
-
-        kfree(p);
-}
-
 int register_external_interrupt(u16 code, ext_int_handler_t handler)
 {
         struct ext_int_info *p;
@@ -202,7 +195,7 @@ int unregister_external_interrupt(u16 code, ext_int_handler_t handler)
         list_for_each_entry_rcu(p, &ext_int_hash[index], entry)
                 if (p->code == code && p->handler == handler) {
                         list_del_rcu(&p->entry);
-                        call_rcu(&p->rcu, ext_int_hash_update);
+                        kfree_rcu(p, rcu);
                 }
         spin_unlock_irqrestore(&ext_int_hash_lock, flags);
         return 0;