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* [Linux-kernel-mentees] [PATCH] net: xen-netback: hash.c: Use built-in RCU list checking
@ 2020-01-15 15:55 madhuparnabhowmik04
  2020-01-15 17:41 ` Wei Liu
  2020-01-17  9:57 ` David Miller
  0 siblings, 2 replies; 6+ messages in thread
From: madhuparnabhowmik04 @ 2020-01-15 15:55 UTC (permalink / raw)
  To: wei.liu, paul
  Cc: paulmck, netdev, linux-kernel, joel, xen-devel, linux-kernel-mentees

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..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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^ permalink raw reply	[flat|nested] 6+ messages in thread
* [Linux-kernel-mentees] [PATCH] net: xen-netback: hash.c: Use built-in RCU list checking
@ 2020-01-15 14:18 madhuparnabhowmik04
  2020-01-15 15:05 ` Wei Liu
  0 siblings, 1 reply; 6+ messages in thread
From: madhuparnabhowmik04 @ 2020-01-15 14:18 UTC (permalink / raw)
  To: wei.liu, paul
  Cc: paulmck, netdev, linux-kernel, joel, xen-devel, linux-kernel-mentees

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 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/xen-netback/hash.c b/drivers/net/xen-netback/hash.c
index 10d580c3dea3..3f9783f70a75 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)
-- 
2.17.1

_______________________________________________
Linux-kernel-mentees mailing list
Linux-kernel-mentees@lists.linuxfoundation.org
https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees

^ permalink raw reply	[flat|nested] 6+ messages in thread

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Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2020-01-15 15:55 [Linux-kernel-mentees] [PATCH] net: xen-netback: hash.c: Use built-in RCU list checking madhuparnabhowmik04
2020-01-15 17:41 ` Wei Liu
2020-01-17  9:57 ` David Miller
  -- strict thread matches above, loose matches on Subject: below --
2020-01-15 14:18 madhuparnabhowmik04
2020-01-15 15:05 ` Wei Liu
2020-01-15 15:47   ` Madhuparna Bhowmik

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