[Xen-devel] [PATCH] net: xen-netback: hash.c: Use built-in RCU list checking

[madhuparnabhowmik04@xxxxxxxxx]

From: Madhuparna Bhowmik <madhuparnabhowmik04@xxxxxxxxx>

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@xxxxxxxxx>
---
 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..6b7532f7c936 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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