Lai Jiangshan 2b3fc35f69 rcu: optionally leave lockdep enabled after RCU lockdep splat
There is no need to disable lockdep after an RCU lockdep splat,
so remove the debug_lockdeps_off() from lockdep_rcu_dereference().
To avoid repeated lockdep splats, use a static variable in the inlined
rcu_dereference_check() and rcu_dereference_protected() macros so that
a given instance splats only once, but so that multiple instances can
be detected per boot.

This is controlled by a new config variable CONFIG_PROVE_RCU_REPEATEDLY,
which is disabled by default.  This provides the normal lockdep behavior
by default, but permits people who want to find multiple RCU-lockdep
splats per boot to easily do so.

Requested-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Tested-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2010-05-10 11:08:31 -07:00
..
2009-12-14 23:55:34 +01:00
2010-02-10 17:47:17 -08:00
2010-03-06 11:26:32 -08:00
2009-12-09 10:03:07 +01:00
2010-03-06 11:26:33 -08:00
2010-03-12 15:52:32 -08:00
2010-04-24 11:31:24 -07:00
2010-03-12 15:53:10 -08:00
2010-03-06 11:26:23 -08:00
2010-01-21 13:40:18 +01:00