rcu: Add __rcu_pending tracing to hierarchical RCU

Add tracing to __rcu_pending() to provide information on why RCU
processing was kicked off.  This is helpful for debugging hierarchical
RCU, and might also be helpful in learning how hierarchical RCU operates.

Located-by: Anton Blanchard <[email protected]>
Tested-by: Anton Blanchard <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
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Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: "Paul E. McKenney" <[email protected]>
LKML-Reference: <1239683479943-git-send-email->
Signed-off-by: Ingo Molnar <[email protected]>

0 files changed, 0 insertions, 0 deletions