net: Add checking to rcu_dereference() primitives
commita898def29e4119bc01ebe7ca97423181f4c0ea2d
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Tue, 23 Feb 2010 01:04:49 +0000 (22 17:04 -0800)
committerIngo Molnar <mingo@elte.hu>
Thu, 25 Feb 2010 08:41:03 +0000 (25 09:41 +0100)
treee6f89d4f4a91fd24507ad600ebb9ad620ec9d9a8
parent3120438ad68601f341e61e7cb1323b0e1a6ca367
net: Add checking to rcu_dereference() primitives

Update rcu_dereference() primitives to use new lockdep-based
checking. The rcu_dereference() in __in6_dev_get() may be
protected either by rcu_read_lock() or RTNL, per Eric Dumazet.
The rcu_dereference() in __sk_free() is protected by the fact
that it is never reached if an update could change it.  Check
for this by using rcu_dereference_check() to verify that the
struct sock's ->sk_wmem_alloc counter is zero.

Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: mathieu.desnoyers@polymtl.ca
Cc: josh@joshtriplett.org
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
Cc: Valdis.Kletnieks@vt.edu
Cc: dhowells@redhat.com
LKML-Reference: <1266887105-1528-5-git-send-email-paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
include/linux/rtnetlink.h
include/net/addrconf.h
net/core/dev.c
net/core/filter.c
net/core/rtnetlink.c
net/core/sock.c
net/decnet/dn_route.c
net/ipv4/route.c
net/packet/af_packet.c