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

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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>
This commit is contained in:
Paul E. McKenney 2012-01-06 16:59:51 -08:00 committed by Paul E. McKenney
parent 5c8806a037
commit bc399d6e6e
1 changed files with 1 additions and 8 deletions
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9
arch/s390/kernel/irq.c
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@ -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;