tracing: Rename 'lockdep' event subsystem into 'lock'

Lockdep events subsystem gathers various locking related events
such as a request, release, contention or acquisition of a lock.

The name of this event subsystem is a bit of a misnomer since
these events are not quite related to lockdep but more generally
to locking, ie: these events are not reporting lock dependencies
or possible deadlock scenario but pure locking events.

Hence this rename.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <1258103194-843-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 96 insertions, 0 deletions

diff --git a/include/trace/events/lock.h b/include/trace/events/lock.h
new file mode 100644
index 000000000000..a870ba125aa8
--- /dev/null
+++ b/include/trace/events/lock.h
@@ -0,0 +1,96 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM lock
+
+#if !defined(_TRACE_LOCK_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_LOCK_H
+
+#include <linux/lockdep.h>
+#include <linux/tracepoint.h>
+
+#ifdef CONFIG_LOCKDEP
+
+TRACE_EVENT(lock_acquire,
+
+        TP_PROTO(struct lockdep_map *lock, unsigned int subclass,
+                int trylock, int read, int check,
+                struct lockdep_map *next_lock, unsigned long ip),
+
+        TP_ARGS(lock, subclass, trylock, read, check, next_lock, ip),
+
+        TP_STRUCT__entry(
+                __field(unsigned int, flags)
+                __string(name, lock->name)
+        ),
+
+        TP_fast_assign(
+                __entry->flags = (trylock ? 1 : 0) | (read ? 2 : 0);
+                __assign_str(name, lock->name);
+        ),
+
+        TP_printk("%s%s%s", (__entry->flags & 1) ? "try " : "",
+                  (__entry->flags & 2) ? "read " : "",
+                  __get_str(name))
+);
+
+TRACE_EVENT(lock_release,
+
+        TP_PROTO(struct lockdep_map *lock, int nested, unsigned long ip),
+
+        TP_ARGS(lock, nested, ip),
+
+        TP_STRUCT__entry(
+                __string(name, lock->name)
+        ),
+
+        TP_fast_assign(
+                __assign_str(name, lock->name);
+        ),
+
+        TP_printk("%s", __get_str(name))
+);
+
+#ifdef CONFIG_LOCK_STAT
+
+TRACE_EVENT(lock_contended,
+
+        TP_PROTO(struct lockdep_map *lock, unsigned long ip),
+
+        TP_ARGS(lock, ip),
+
+        TP_STRUCT__entry(
+                __string(name, lock->name)
+        ),
+
+        TP_fast_assign(
+                __assign_str(name, lock->name);
+        ),
+
+        TP_printk("%s", __get_str(name))
+);
+
+TRACE_EVENT(lock_acquired,
+        TP_PROTO(struct lockdep_map *lock, unsigned long ip, s64 waittime),
+
+        TP_ARGS(lock, ip, waittime),
+
+        TP_STRUCT__entry(
+                __string(name, lock->name)
+                __field(unsigned long, wait_usec)
+                __field(unsigned long, wait_nsec_rem)
+        ),
+        TP_fast_assign(
+                __assign_str(name, lock->name);
+                __entry->wait_nsec_rem = do_div(waittime, NSEC_PER_USEC);
+                __entry->wait_usec = (unsigned long) waittime;
+        ),
+        TP_printk("%s (%lu.%03lu us)", __get_str(name), __entry->wait_usec,
+                                       __entry->wait_nsec_rem)
+);
+
+#endif
+#endif
+
+#endif /* _TRACE_LOCK_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>