AcoSail/kernel_optimize_test
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xen-netback: using kfree_rcu() to simplify the code

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The callback function of call_rcu() just calls a kfree(), so we
can use kfree_rcu() instead of call_rcu() + callback function.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wei Yongjun 2016-08-22 23:01:29 +00:00 committed by David S. Miller
parent c41419b091
commit 1345b1ac57
1 changed files with 2 additions and 11 deletions
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13
drivers/net/xen-netback/hash.c
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@ -32,15 +32,6 @@
#include <linux/vmalloc.h>
#include <linux/rculist.h>
static void xenvif_del_hash(struct rcu_head *rcu)
{
struct xenvif_hash_cache_entry *entry;
entry = container_of(rcu, struct xenvif_hash_cache_entry, rcu);
kfree(entry);
}
static void xenvif_add_hash(struct xenvif *vif, const u8 *tag,
unsigned int len, u32 val)
{
@ -76,7 +67,7 @@ static void xenvif_add_hash(struct xenvif *vif, const u8 *tag,
if (++vif->hash.cache.count > xenvif_hash_cache_size) {
list_del_rcu(&oldest->link);
vif->hash.cache.count--;
call_rcu(&oldest->rcu, xenvif_del_hash);
kfree_rcu(oldest, rcu);
}
}
@ -114,7 +105,7 @@ static void xenvif_flush_hash(struct xenvif *vif)
list_for_each_entry_rcu(entry, &vif->hash.cache.list, link) {
list_del_rcu(&entry->link);
vif->hash.cache.count--;
call_rcu(&entry->rcu, xenvif_del_hash);
kfree_rcu(entry, rcu);
}
spin_unlock_irqrestore(&vif->hash.cache.lock, flags);