2 * probes/lttng-probe-writeback.c
4 * LTTng writeback probes.
6 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 * Copyright (C) 2012 Mentor Graphics Corp.
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; only
12 * version 2.1 of the License.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include <linux/module.h>
25 #include <linux/device.h>
29 * Create the tracepoint static inlines from the kernel to validate that our
30 * trace event macros match the kernel we run on.
32 #include <trace/events/writeback.h>
34 #include "../lttng-kernel-version.h"
36 /* #if <check version number if global_dirty_limit will be exported> */
37 #ifdef CONFIG_KALLSYMS
38 #include "../wrapper/kallsyms.h"
40 static unsigned long *wrapper_global_dirty_limit_sym
= 0;
42 unsigned long wrapper_global_dirty_limit(void)
44 if (!wrapper_global_dirty_limit_sym
)
45 wrapper_global_dirty_limit_sym
=
46 (void *)kallsyms_lookup_funcptr("global_dirty_limit");
47 if (wrapper_global_dirty_limit_sym
)
48 return *wrapper_global_dirty_limit_sym
;
50 printk(KERN_WARNING
"LTTng: global_dirty_limit symbol lookup failed.\n");
54 #define global_dirty_limit wrapper_global_dirty_limit()
56 /* #endif <check version number> */
59 * Create LTTng tracepoint probes.
61 #define LTTNG_PACKAGE_BUILD
62 #define CREATE_TRACE_POINTS
63 #define TRACE_INCLUDE_PATH ../instrumentation/events/lttng-module
65 #include "../instrumentation/events/lttng-module/writeback.h"
67 MODULE_LICENSE("GPL and additional rights");
68 MODULE_AUTHOR("Andrew Gabbasov <andrew_gabbasov@mentor.com>");
69 MODULE_DESCRIPTION("LTTng writeback probes");