lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

netpoll: Add netpoll_tx_running

Browse Source 
This patch adds the helper netpoll_tx_running for use within
ndo_start_xmit.  It returns non-zero if ndo_start_xmit is being
invoked by netpoll, and zero otherwise.

This is currently implemented by simply looking at the hardirq
count.  This is because for all non-netpoll uses of ndo_start_xmit,
IRQs must be enabled while netpoll always disables IRQs before
calling ndo_start_xmit.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu
2010-06-10 16:12:49 +00:00
committed by David S. Miller
parent 8fdd95ec16
commit c18370f5b2
1 changed files with 9 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
include/linux/netpoll.h
View File

@@ -116,6 +116,11 @@ static inline void netpoll_poll_unlock(void *have)
} }
} }
static inline int netpoll_tx_running(struct net_device *dev)
{
return irqs_disabled();
}
#else #else
static inline int netpoll_rx(struct sk_buff *skb) static inline int netpoll_rx(struct sk_buff *skb)
{ {
@@ -139,6 +144,10 @@ static inline void netpoll_poll_unlock(void *have)
static inline void netpoll_netdev_init(struct net_device *dev) static inline void netpoll_netdev_init(struct net_device *dev)
{ {
} }
static inline int netpoll_tx_running(struct net_device *dev)
{
return 0;
}
#endif #endif
#endif #endif