[PATCH 1/9] netpoll: export refill_skbs(), refill_skbs_work_handler(), skb_pool_flush()

[Breno Leitao <leitao@debian.org>]

These three helpers manage the per-netpoll fallback skb pool. They
are file-static today because all of their callers live in
net/core/netpoll.c. Subsequent patches relocate the pool's owner
from struct netpoll to the only consumer that actually uses it
(netconsole), and that work needs netconsole to drive the helpers
directly while the function bodies still live here.

Drop static, add prototypes in <linux/netpoll.h>, and
EXPORT_SYMBOL_GPL() each. No behaviour change.

The exports are transitional. Each helper is moved into
drivers/net/netconsole.c later in this series, and at that point
its EXPORT_SYMBOL_GPL() and prototype are dropped. By the end of
the series no symbol introduced here remains exported.

Signed-off-by: Breno Leitao <leitao@debian.org>
---
 include/linux/netpoll.h | 3 +++
 net/core/netpoll.c      | 9 ++++++---
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index e4b8f1f91e54..9fa4deed0bff 100644
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h
@@ -74,6 +74,9 @@ void netpoll_cleanup(struct netpoll *np);
 void do_netpoll_cleanup(struct netpoll *np);
 netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb);
 void netpoll_zap_completion_queue(void);
+void refill_skbs(struct netpoll *np);
+void refill_skbs_work_handler(struct work_struct *work);
+void skb_pool_flush(struct netpoll *np);
 
 #ifdef CONFIG_NETPOLL
 static inline void *netpoll_poll_lock(struct napi_struct *napi)
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 33ab3d827a42..84cbfa85028a 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -220,7 +220,7 @@ void netpoll_poll_enable(struct net_device *dev)
 		up(&ni->dev_lock);
 }
 
-static void refill_skbs(struct netpoll *np)
+void refill_skbs(struct netpoll *np)
 {
 	struct sk_buff_head *skb_pool;
 	struct sk_buff *skb;
@@ -235,6 +235,7 @@ static void refill_skbs(struct netpoll *np)
 		skb_queue_tail(skb_pool, skb);
 	}
 }
+EXPORT_SYMBOL_GPL(refill_skbs);
 
 void netpoll_zap_completion_queue(void)
 {
@@ -356,7 +357,7 @@ netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
 }
 EXPORT_SYMBOL(netpoll_send_skb);
 
-static void skb_pool_flush(struct netpoll *np)
+void skb_pool_flush(struct netpoll *np)
 {
 	struct sk_buff_head *skb_pool;
 
@@ -364,14 +365,16 @@ static void skb_pool_flush(struct netpoll *np)
 	skb_pool = &np->skb_pool;
 	skb_queue_purge_reason(skb_pool, SKB_CONSUMED);
 }
+EXPORT_SYMBOL_GPL(skb_pool_flush);
 
-static void refill_skbs_work_handler(struct work_struct *work)
+void refill_skbs_work_handler(struct work_struct *work)
 {
 	struct netpoll *np =
 		container_of(work, struct netpoll, refill_wq);
 
 	refill_skbs(np);
 }
+EXPORT_SYMBOL_GPL(refill_skbs_work_handler);
 
 int __netpoll_setup(struct netpoll *np, struct net_device *ndev)
 {

-- 
2.54.0