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linux-next/include
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Eric Dumazet 89c4b442b7 netpoll: more efficient locking 
Callers of netpoll_poll_lock() own NAPI_STATE_SCHED

Callers of netpoll_poll_unlock() have BH blocked between
the NAPI_STATE_SCHED being cleared and poll_lock is released.

We can avoid the spinlock which has no contention, and use cmpxchg()
on poll_owner which we need to set anyway.

This removes a possible lockdep violation after the cited commit,
since sk_busy_loop() re-enables BH before calling busy_poll_stop()

Fixes: 217f697436 ("net: busy-poll: allow preemption in sk_busy_loop()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-16 18:32:02 -05:00
..
acpi Merge branches 'acpi-wdat' and 'acpi-cppc' 2016-10-21 22:24:23 +02:00
asm-generic mm: kmemleak: scan .data.ro_after_init 2016-11-11 08:12:37 -08:00
clocksource
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-10-10 11:19:47 +08:00
drm drm: Don't force all planes to be added to the state due to zpos 2016-10-26 18:48:05 +02:00
dt-bindings net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs. 2016-10-14 10:06:13 -04:00
keys
kvm
linux netpoll: more efficient locking 2016-11-16 18:32:02 -05:00
math-emu
media Linux 4.8 2016-10-05 16:43:53 -03:00
memory
misc
net lwtunnel: subtract tunnel headroom from mtu on output redirect 2016-11-16 17:01:15 -05:00
pcmcia
ras
rdma Merge of primary rdma-core code for 4.9 2016-10-09 17:04:33 -07:00
rxrpc
scsi Merge remote-tracking branch 'mkp-scsi/4.8/scsi-fixes' into fixes 2016-09-27 22:30:51 -07:00
soc powerpc updates for 4.9 #2 2016-10-14 11:07:42 -07:00
sound ASoC: Updates for v4.9 2016-09-30 18:40:40 +02:00
target target: Make EXTENDED_COPY 0xe4 failure return COPY TARGET DEVICE NOT REACHABLE 2016-10-19 21:22:32 -07:00
trace Merge branch 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 2016-10-14 12:18:50 -07:00
uapi bpf: Add BPF_MAP_TYPE_LRU_PERCPU_HASH 2016-11-15 11:50:20 -05:00
video fbdev changes for 4.9 2016-10-12 11:01:37 -07:00
xen xen: features and fixes for 4.9-rc0 2016-10-06 11:19:10 -07:00
Kbuild