probes/rcu-trace.c

   1 /*
   2  * ltt/probes/rcu-trace.c
   3  *
   4  * RCU tracepoint probes.
   5  *
   6  * (C) Copyright 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
   7  * Dual LGPL v2.1/GPL v2 license.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <trace/rcu.h>
  12
  13 #ifdef CONFIG_TREE_RCU
  14 void probe_rcu_tree_callback(void *data, struct rcu_head *head)
  15 {
  16         trace_mark_tp(rcu, tree_callback, rcu_tree_callback,
  17                 probe_rcu_tree_callback, "func %p", head->func);
  18 }
  19
  20 void probe_rcu_tree_call_rcu(void *data, struct rcu_head *head, unsigned long ip)
  21 {
  22         trace_mark_tp(rcu, tree_call_rcu, rcu_tree_call_rcu,
  23                 probe_rcu_tree_call_rcu, "func %p ip 0x%lX", head->func, ip);
  24 }
  25
  26 void probe_rcu_tree_call_rcu_bh(void *data, struct rcu_head *head, unsigned long ip)
  27 {
  28         trace_mark_tp(rcu, tree_call_rcu_bh, rcu_tree_call_rcu_bh,
  29                 probe_rcu_tree_call_rcu_bh, "func %p ip 0x%lX",
  30                 head->func, ip);
  31 }
  32 #endif
  33
  34 MODULE_LICENSE("GPL and additional rights");
  35 MODULE_AUTHOR("Mathieu Desnoyers");
  36 MODULE_DESCRIPTION("RCU Tracepoint Probes");