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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2010-06-10 16:12:49 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-15 10:58:40 -0700 |
| commit | c18370f5b2949d9cca519355f33690b75e1e7c8b (patch) | |
| tree | 8e3a2e741bacf9121d2f2b4351d3e8efb640c818 /include/linux/netpoll.h | |
| parent | 8fdd95ec162a8fbac7f41d6f54f90402fe3e8cb1 (diff) | |
| download | lwn-c18370f5b2949d9cca519355f33690b75e1e7c8b.tar.gz lwn-c18370f5b2949d9cca519355f33690b75e1e7c8b.zip | |
netpoll: Add netpoll_tx_running
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>
Diffstat (limited to 'include/linux/netpoll.h')
| -rw-r--r-- | include/linux/netpoll.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h index f3ad74af7e1f..4c77fe78ceff 100644 --- a/include/linux/netpoll.h +++ b/include/linux/netpoll.h @@ -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 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 int netpoll_tx_running(struct net_device *dev) +{ + return 0; +} #endif #endif |