rcu: Track RCU idle periods using lockdep
There have been several bugs involving illegal use of RCU read-side
critical sections from the idle loop. Most of these have been easy to
track down, but any number of bugs involving unbalanced idle entry/exit
calls could be difficult to locate. This commit therefore adds lockdep
support for tracking RCU idle entry and exit in order to provide more
information for locating unbalanced idle entry/exit calls.
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
5 files changed
