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net: xen-netback: hash.c: Use built-in RCU list checking

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list_for_each_entry_rcu has built-in RCU and lock checking.
Pass cond argument to list_for_each_entry_rcu.

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik04@gmail.com>
Acked-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Madhuparna Bhowmik 2020-01-15 21:25:53 +05:30 • committed by David S. Miller
parent 6bc8038035
commit f3265971de
1 changed files with 4 additions and 2 deletions
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6
drivers/net/xen-netback/hash.c
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@ -51,7 +51,8 @@ static void xenvif_add_hash(struct xenvif *vif, const u8 *tag,
found = false; found = false;
oldest = NULL; oldest = NULL;
list_for_each_entry_rcu(entry, &vif->hash.cache.list, link) { list_for_each_entry_rcu(entry, &vif->hash.cache.list, link,
lockdep_is_held(&vif->hash.cache.lock)) {
/* Make sure we don't add duplicate entries */ /* Make sure we don't add duplicate entries */
if (entry->len == len && if (entry->len == len &&
memcmp(entry->tag, tag, len) == 0) memcmp(entry->tag, tag, len) == 0)
@ -102,7 +103,8 @@ static void xenvif_flush_hash(struct xenvif *vif)
spin_lock_irqsave(&vif->hash.cache.lock, flags); spin_lock_irqsave(&vif->hash.cache.lock, flags);
list_for_each_entry_rcu(entry, &vif->hash.cache.list, link) { list_for_each_entry_rcu(entry, &vif->hash.cache.list, link,
lockdep_is_held(&vif->hash.cache.lock)) {
list_del_rcu(&entry->link); list_del_rcu(&entry->link);
vif->hash.cache.count--; vif->hash.cache.count--;
kfree_rcu(entry, rcu); kfree_rcu(entry, rcu);