From: madhuparnabhowmik04@gmail.com
To: wei.liu@kernel.org, paul@xen.org, davem@davemloft.net
Cc: paulmck@kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, joel@joelfernandes.org,
xen-devel@lists.xenproject.org,
linux-kernel-mentees@lists.linuxfoundation.org
Subject: [Linux-kernel-mentees] [PATCH] net: xen-netbank: hash.c: Use built-in RCU list checking
Date: Wed, 15 Jan 2020 18:11:28 +0530 [thread overview]
Message-ID: <20200115124129.5684-1-madhuparnabhowmik04@gmail.com> (raw)
From: Madhuparna Bhowmik <madhuparnabhowmik04@gmail.com>
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>
---
drivers/net/xen-netback/hash.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/xen-netback/hash.c b/drivers/net/xen-netback/hash.c
index 10d580c3dea3..30709bc9d170 100644
--- a/drivers/net/xen-netback/hash.c
+++ b/drivers/net/xen-netback/hash.c
@@ -51,7 +51,8 @@ static void xenvif_add_hash(struct xenvif *vif, const u8 *tag,
found = false;
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 */
if (entry->len == len &&
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);
- 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);
vif->hash.cache.count--;
kfree_rcu(entry, rcu);
--
2.17.1
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next reply other threads:[~2020-01-15 12:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-15 12:41 madhuparnabhowmik04 [this message]
2020-01-15 13:56 ` [Linux-kernel-mentees] [PATCH] net: xen-netbank: hash.c: Use built-in RCU list checking Wei Liu
2020-01-15 14:06 ` Madhuparna Bhowmik
2020-01-15 15:04 ` Wei Liu
2020-01-15 15:46 ` Madhuparna Bhowmik
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