diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2010-04-15 12:50:39 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-04-19 08:37:19 +0200 |
| commit | bc293d62b26ec590afc90a9e0a31c45d355b7bd8 (patch) | |
| tree | 4b61dee53e849f0ba1d5a7fef58522e224be836e /Documentation/lockdep-design.txt | |
| parent | 50aec0024eccb1d5f540ab64a1958eebcdb9340c (diff) | |
rcu: Make RCU lockdep check the lockdep_recursion variable
The lockdep facility temporarily disables lockdep checking by
incrementing the current->lockdep_recursion variable. Such
disabling happens in NMIs and in other situations where lockdep
might expect to recurse on itself.
This patch therefore checks current->lockdep_recursion, disabling RCU
lockdep splats when this variable is non-zero. In addition, this patch
removes the "likely()", as suggested by Lai Jiangshan.
Reported-by: Frederic Weisbecker <fweisbec@gmail.com>
Reported-by: David Miller <davem@davemloft.net>
Tested-by: Frederic Weisbecker <fweisbec@gmail.com>
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
Cc: eric.dumazet@gmail.com
LKML-Reference: <20100415195039.GA22623@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation/lockdep-design.txt')
0 files changed, 0 insertions, 0 deletions