[ltt-dev] [PATCH] fix build error of marker.c

[KOSAKI Motohiro]

Hi Mathieu,

I got lttng from following tree.
but it can't build.

$ git-clone  git://git.kernel.org/pub/scm/linux/kernel/git/compudj/linux-2.6-lttng.git

Perhaps, I got code form wrong git repo?



Patch against: head of the repository of git://git.kernel.org/pub/scm/linux/kernel/git/compudj/linux-2.6-lttng.git

------------------------------------------------
fix following build error.


  CC      kernel/marker.o
kernel/marker.c: In function ‘sys_marker’:
kernel/marker.c:993: error: ‘markers_mutex’ undeclared (first use in this function)
kernel/marker.c:993: error: (Each undeclared identifier is reported only once
kernel/marker.c:993: error: for each function it appears in.)
kernel/marker.c: In function ‘marker_update_processes’:
kernel/marker.c:1081: error: ‘markers_mutex’ undeclared (first use in this function)
kernel/marker.c: In function ‘marker_update_process’:
kernel/marker.c:1111: error: ‘markers_mutex’ undeclared (first use in this function)
kernel/marker.c: In function ‘exit_user_markers’:
kernel/marker.c:1159: error: ‘markers_mutex’ undeclared (first use in this function)
kernel/marker.c: In function ‘is_marker_enabled’:
kernel/marker.c:1175: error: ‘markers_mutex’ undeclared (first use in this function)

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro at jp.fujitsu.com>

---
 kernel/marker.c |    6 ++++++
 1 file changed, 6 insertions(+)

Index: b/kernel/marker.c
===================================================================
--- a/kernel/marker.c	2008-10-28 12:42:14.000000000 +0900
+++ b/kernel/marker.c	2008-10-28 13:46:49.000000000 +0900
@@ -36,6 +36,12 @@ extern struct marker __stop___markers[];
 static const int marker_debug;
 
 /*
+ * markers_mutex nests inside module_mutex. Markers mutex protects the builtin
+ * and module markers and the hash table.
+ */
+static DEFINE_MUTEX(markers_mutex);
+
+/*
  * Marker hash table, containing the active markers.
  * lock_modules() protects the builtin and module markers and the hash table.
  */