Markers Implementation for RCU Tracing

Hi Ingo,
Please accept these patches into the rt tree which convert the
existing RCU tracing mechanism for Preempt RCU and RCU Boost into markers.

These patches are based upon the 2.6.24-rc5-rt1 kernel tree.

Along with marker transition, the RCU Tracing infrastructure has also been modularised to be built as a kernel module, thereby enabling runtime changes to the RCU Tracing infrastructure.

Patch [1/2] - Patch that converts the Preempt RCU tracing in rcupreempt.c into markers.

Patch [1/2] - Patch that converts the Preempt RCU Boost tracing in rcupreempt-boost.c into markers.

Thanks,
K.Prasad
([email protected])