redonkable/alistair23-linux
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alistair23-linux/net
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Timo Teräs ea2dea9dac xfrm: remove policy lock when accessing policy->walk.dead 
All of the code considers ->dead as a hint that the cached policy
needs to get refreshed. The read side can just drop the read lock
without any side effects.

The write side needs to make sure that it's written only exactly
once. Only possible race is at xfrm_policy_kill(). This is fixed
by checking result of __xfrm_policy_unlink() when needed. It will
always succeed if the policy object is looked up from the hash
list (so some checks are removed), but it needs to be checked if
we are trying to unlink policy via a reference (appropriate
checks added).

Since policy->walk.dead is written exactly once, it no longer
needs to be protected with a write lock.

Signed-off-by: Timo Teras <timo.teras@iki.fi>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-01 19:41:35 -07:00
..
9p 9p: Change the name of new protocol from 9p2010.L to 9p2000.L 2010-03-13 08:57:29 -06:00
802 sysctl net: Remove unused binary sysctl code 2009-11-12 02:05:06 -08:00
8021q Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-03-20 15:24:29 -07:00
appletalk net: appletalk: use seq_hlist_foo() helpers 2010-02-10 11:12:09 -08:00
atm atm: Use kasprintf 2010-03-21 18:34:15 -07:00
ax25 net: ax25: use seq_hlist_foo() helpers 2010-02-10 11:12:09 -08:00
bluetooth net: convert multiple drivers to use netdev_for_each_mc_addr, part7 2010-03-16 21:23:25 -07:00
bridge bridge: cleanup: remove unused assignment 2010-03-21 21:21:58 -07:00
caif net-caif: using kmalloc/kfree requires the include of slab.h 2010-04-01 00:28:49 -07:00
can can: deny filterlist access on non-CAN interfaces 2010-02-02 07:21:34 -08:00
core rps: keep the old behavior on SMP without rps 2010-04-01 18:41:40 -07:00
dcb const: struct nla_policy 2010-02-18 14:30:18 -08:00
dccp net: remove trailing space in messages 2010-03-24 14:01:54 -07:00
decnet net: Add checking to rcu_dereference() primitives 2010-02-25 09:41:03 +01:00
dsa netdev: convert pseudo-devices to netdev_tx_t 2009-09-01 01:13:07 -07:00
econet net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
ethernet llc: use dev_hard_header 2009-12-26 20:38:23 -08:00
ieee802154 net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
ipv4 ipv4: remove redundant verification code 2010-04-01 18:38:47 -07:00
ipv6 ipv6 fib: Use "Sweezle" to optimize addr_bit_test(). 2010-03-30 23:28:47 -07:00
ipx net: ipx: use seq_list_foo() helpers 2010-02-10 12:31:10 -08:00
irda net: remove trailing space in messages 2010-03-24 14:01:54 -07:00
iucv const: constify remaining dev_pm_ops 2009-12-15 08:53:25 -08:00
key xfrm: SP lookups signature with mark 2010-02-22 16:21:12 -08:00
lapb net: remove NET_RX_BAD and NET_RX_CN* defines 2009-07-05 19:15:35 -07:00
llc llc: cleanup: remove dead code from llc_init() 2010-03-24 13:34:08 -07:00
mac80211 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 2010-03-29 13:50:10 -07:00
netfilter netfilter: ctnetlink: fix reliable event delivery if message building fails 2010-03-20 14:29:03 -07:00
netlabel net: remove INIT_RCU_HEAD() usage 2010-02-17 00:03:27 -08:00
netlink netlink: use the appropriate namespace pid 2010-03-26 20:13:58 -07:00
netrom net: netrom: use seq_hlist_foo() helpers 2010-02-10 11:12:08 -08:00
packet af_packet: move strict addr_len check right before dev_[mc/unicast]_[add/del] 2010-03-03 01:04:38 -08:00
phonet phonet: use for_each_set_bit() 2010-03-15 16:00:47 -07:00
rds rds: cleanup: remove unneeded variable 2010-03-24 13:34:09 -07:00
rfkill rename new rfkill sysfs knobs 2010-03-19 15:48:25 -04:00
rose net: rose: use seq_hlist_foo() helpers 2010-02-10 11:12:08 -08:00
rxrpc net: use net_eq to compare nets 2009-11-25 15:14:13 -08:00
sched gen_estimator: deadlock fix 2010-04-01 18:38:48 -07:00
sctp sctp: eliminate useless code 2010-03-30 23:58:22 -07:00
sunrpc net: remove trailing space in messages 2010-03-24 14:01:54 -07:00
tipc tipc: define needless global scoped variable static 2010-03-30 23:58:22 -07:00
unix AF_UNIX: update locking comment 2010-02-18 14:12:06 -08:00
wanrouter headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
wimax wimax: remove unneeded variable 2010-03-24 13:34:09 -07:00
wireless cfg80211: Add connection quality monitoring support to nl80211 2010-03-24 16:02:37 -04:00
x25 net: backlog functions rename 2010-03-05 13:34:03 -08:00
xfrm xfrm: remove policy lock when accessing policy->walk.dead 2010-04-01 19:41:35 -07:00
compat.c net: use compat helper functions in compat_sys_recvmmsg 2009-12-11 15:07:57 -08:00
Kconfig net-caif: add CAIF Kconfig and Makefiles 2010-03-30 19:08:49 -07:00
Makefile net-caif: add CAIF Kconfig and Makefiles 2010-03-30 19:08:49 -07:00
nonet.c
socket.c fs: no games with DCACHE_UNHASHED 2009-12-17 10:51:40 -05:00
sysctl_net.c net: spread __net_init, __net_exit 2010-01-17 19:16:02 -08:00
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