rcu: Add RCU type to callback-invocation tracing

Add a string to the rcu_batch_start() and rcu_batch_end() trace
messages that indicates the RCU type ("rcu_sched", "rcu_bh", or
"rcu_preempt").  The trace messages for the actual invocations
themselves are not marked, as it should be clear from the
rcu_batch_start() and rcu_batch_end() events before and after.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/kernel/rcutiny.c b/kernel/rcutiny.c
index 0d28974b78f4..1c37bdd464f1 100644
--- a/kernel/rcutiny.c
+++ b/kernel/rcutiny.c
@@ -168,14 +168,14 @@ static void rcu_process_callbacks(struct rcu_ctrlblk *rcp)
 
         /* If no RCU callbacks ready to invoke, just return. */
         if (&rcp->rcucblist == rcp->donetail) {
-                RCU_TRACE(trace_rcu_batch_start(0, -1));
-                RCU_TRACE(trace_rcu_batch_end(0));
+                RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, -1));
+                RCU_TRACE(trace_rcu_batch_end(rcp->name, 0));
                 return;
         }
 
         /* Move the ready-to-invoke callbacks to a local list. */
         local_irq_save(flags);
-        RCU_TRACE(trace_rcu_batch_start(0, -1));
+        RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, -1));
         list = rcp->rcucblist;
         rcp->rcucblist = *rcp->donetail;
         *rcp->donetail = NULL;
@@ -197,7 +197,7 @@ static void rcu_process_callbacks(struct rcu_ctrlblk *rcp)
                 RCU_TRACE(cb_count++);
         }
         RCU_TRACE(rcu_trace_sub_qlen(rcp, cb_count));
-        RCU_TRACE(trace_rcu_batch_end(cb_count));
+        RCU_TRACE(trace_rcu_batch_end(rcp->name, cb_count));
 }
 
 /*