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netpoll: rename and export netpoll_zap_completion_queue()

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zap_completion_queue() drains the per-CPU softnet completion queue.
Rename it with the netpoll_ prefix shared by the rest of the
subsystem's public API, and promote it from file-static to
EXPORT_SYMBOL_NS_GPL in the NETDEV_INTERNAL namespace so the upcoming
netconsole-side find_skb() can call it once the function moves out.
A forward declaration is added to include/linux/netpoll.h, and the
old file-static forward declaration is dropped.

No functional change.

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20260512-netconsole_split-v2-8-1191d14ad66d@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao 2026-05-12 03:46:41 -07:00 committed by Jakub Kicinski
parent 597bfa9431
commit 7bb1daff36
2 changed files with 5 additions and 5 deletions
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1
include/linux/netpoll.h
View File

@ -74,6 +74,7 @@ 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);
struct sk_buff *find_skb(struct netpoll *np, int len, int reserve);
void netpoll_zap_completion_queue(void);
#ifdef CONFIG_NETPOLL
static inline void *netpoll_poll_lock(struct napi_struct *napi)

9
net/core/netpoll.c
View File

@ -51,8 +51,6 @@
sizeof(struct udphdr) + \
MAX_UDP_CHUNK)
static void zap_completion_queue(void);
static unsigned int carrier_timeout = 4;
module_param(carrier_timeout, uint, 0644);
@ -199,7 +197,7 @@ void netpoll_poll_dev(struct net_device *dev)
up(&ni->dev_lock);
zap_completion_queue();
netpoll_zap_completion_queue();
}
EXPORT_SYMBOL(netpoll_poll_dev);
@ -238,7 +236,7 @@ static void refill_skbs(struct netpoll *np)
}
}
static void zap_completion_queue(void)
void netpoll_zap_completion_queue(void)
{
unsigned long flags;
struct softnet_data *sd = &get_cpu_var(softnet_data);
@ -265,13 +263,14 @@ static void zap_completion_queue(void)
put_cpu_var(softnet_data);
}
EXPORT_SYMBOL_NS_GPL(netpoll_zap_completion_queue, "NETDEV_INTERNAL");
struct sk_buff *find_skb(struct netpoll *np, int len, int reserve)
{
int count = 0;
struct sk_buff *skb;
zap_completion_queue();
netpoll_zap_completion_queue();
repeat:
skb = alloc_skb(len, GFP_ATOMIC);