Add a managed version of netdev_alloc_pcpu_stats, e.g. for allocating
the per-cpu stats in the probe() callback of a driver. It needs to be
a macro for dealing properly with the type argument.
Signed-off-by: Heiner Kallweit <hkallwe...@gmail.com>
---
include/linux/netdevice.h | 15 +++++++++++++++
net/devres.c | 6 ++++++
2 files changed, 21 insertions(+)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 568fab708..f5f41c160 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2596,6 +2596,21 @@ static inline void dev_lstats_add(struct net_device
*dev, unsigned int len)
#define netdev_alloc_pcpu_stats(type) \
__netdev_alloc_pcpu_stats(type, GFP_KERNEL)
+void devm_free_pcpu_stats(void *data);
+
+#define devm_netdev_alloc_pcpu_stats(dev, type)
\
+({ \
+ typeof(type) __percpu *pcpu_stats = netdev_alloc_pcpu_stats(type); \
+ if (pcpu_stats) { \
+ int rc = devm_add_action_or_reset(dev, \
+ devm_free_pcpu_stats, \
+ (__force void *)pcpu_stats); \
+ if (rc) \
+ pcpu_stats = NULL; \
+ } \
+ pcpu_stats; \
+})
+
enum netdev_lag_tx_type {
NETDEV_LAG_TX_TYPE_UNKNOWN,
NETDEV_LAG_TX_TYPE_RANDOM,
diff --git a/net/devres.c b/net/devres.c
index 1f9be2133..0d6545946 100644
--- a/net/devres.c
+++ b/net/devres.c
@@ -93,3 +93,9 @@ int devm_register_netdev(struct device *dev, struct
net_device *ndev)
return 0;
}
EXPORT_SYMBOL(devm_register_netdev);
+
+void devm_free_pcpu_stats(void *data)
+{
+ free_percpu((__force void __percpu *)data);
+}
+EXPORT_SYMBOL_GPL(devm_free_pcpu_stats);
--
2.28.0
