Neil Horman 4fdcfa1284 drop_monitor: prevent init path from scheduling on the wrong cpu ... I just noticed after some recent updates, that the init path for the drop monitor protocol has a minor error. drop monitor maintains a per cpu structure, that gets initalized from a single cpu. Normally this is fine, as the protocol isn't in use yet, but I recently made a change that causes a failed skb allocation to reschedule itself . Given the current code, the implication is that this workqueue reschedule will take place on the wrong cpu. If drop monitor is used early during the boot process, its possible that two cpus will access a single per-cpu structure in parallel, possibly leading to data corruption. This patch fixes the situation, by storing the cpu number that a given instance of this per-cpu data should be accessed from. In the case of a need for a reschedule, the cpu stored in the struct is assigned the rescheule, rather than the currently executing cpu Tested successfully by myself. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: David Miller <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>		2012-05-02 21:02:48 -04:00
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datagram.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
dev_addr_lists.c	net: fix /proc/net/dev regression	2012-04-03 17:23:23 -04:00
dev.c	net: In unregister_netdevice_notifier unregister the netdevices.	2012-04-13 11:01:43 -04:00
drop_monitor.c	drop_monitor: prevent init path from scheduling on the wrong cpu	2012-05-02 21:02:48 -04:00
dst.c
ethtool.c
fib_rules.c
filter.c	bpf jit: Make the filter.c::__load_pointer helper non-static for the jits	2012-04-03 18:01:03 -04:00
flow_dissector.c
flow.c
gen_estimator.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
gen_stats.c
iovec.c
kmap_skb.h
link_watch.c
Makefile
neighbour.c
net_namespace.c	netns: do not leak net_generic data on failed init	2012-04-18 00:05:33 -04:00
net-sysfs.c
net-sysfs.h
net-traces.c
netevent.c
netpoll.c
netprio_cgroup.c
pktgen.c
request_sock.c
rtnetlink.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
scm.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
secure_seq.c
skbuff.c	net: allow pskb_expand_head() to get maximum tailroom	2012-04-11 10:10:43 -04:00
sock_diag.c
sock.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
stream.c
sysctl_net_core.c
timestamping.c
user_dma.c
utils.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00