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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2010-02-23 04:04:49 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-02-25 11:41:03 +0300 |
| commit | a898def29e4119bc01ebe7ca97423181f4c0ea2d (patch) | |
| tree | e6f89d4f4a91fd24507ad600ebb9ad620ec9d9a8 /include/linux/rtnetlink.h | |
| parent | 3120438ad68601f341e61e7cb1323b0e1a6ca367 (diff) | |
| download | linux-a898def29e4119bc01ebe7ca97423181f4c0ea2d.tar.xz | |
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>
Diffstat (limited to 'include/linux/rtnetlink.h')
| -rw-r--r-- | include/linux/rtnetlink.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h index 05330fc5b436..5c52fa43785c 100644 --- a/include/linux/rtnetlink.h +++ b/include/linux/rtnetlink.h @@ -735,6 +735,9 @@ extern void rtnl_lock(void); extern void rtnl_unlock(void); extern int rtnl_trylock(void); extern int rtnl_is_locked(void); +#ifdef CONFIG_PROVE_LOCKING +extern int lockdep_rtnl_is_held(void); +#endif /* #ifdef CONFIG_PROVE_LOCKING */ extern void rtnetlink_init(void); extern void __rtnl_unlock(void); |