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| author | Mark Brown <broonie@kernel.org> | 2017-04-25 16:35:35 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-04-25 16:35:35 +0100 |
| commit | 9095bf25ea08135a5b74875dd0e3eeaddc4218a0 (patch) | |
| tree | a4e6976eab0e7a5b6258281077cd5853c7e69514 /include/linux/netpoll.h | |
| parent | cdf4275e957c6bad3756e98942341667f1d7de7d (diff) | |
| parent | c1ae3cfa0e89fa1a7ecc4c99031f5e9ae99d9201 (diff) | |
Merge tag 'v4.11-rc1' into regulator-arizona
Linux 4.11-rc1
Diffstat (limited to 'include/linux/netpoll.h')
| -rw-r--r-- | include/linux/netpoll.h | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h index b25ee9ffdbe6..1828900c9411 100644 --- a/include/linux/netpoll.h +++ b/include/linux/netpoll.h @@ -78,8 +78,11 @@ static inline void *netpoll_poll_lock(struct napi_struct *napi) struct net_device *dev = napi->dev; if (dev && dev->npinfo) { - spin_lock(&napi->poll_lock); - napi->poll_owner = smp_processor_id(); + int owner = smp_processor_id(); + + while (cmpxchg(&napi->poll_owner, -1, owner) != -1) + cpu_relax(); + return napi; } return NULL; @@ -89,10 +92,8 @@ static inline void netpoll_poll_unlock(void *have) { struct napi_struct *napi = have; - if (napi) { - napi->poll_owner = -1; - spin_unlock(&napi->poll_lock); - } + if (napi) + smp_store_release(&napi->poll_owner, -1); } static inline bool netpoll_tx_running(struct net_device *dev) |