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b87700e3 AG |
1 | /* |
2 | * probes/lttng-probe-writeback.c | |
3 | * | |
4 | * LTTng writeback probes. | |
5 | * | |
6 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
7 | * Copyright (C) 2012 Mentor Graphics Corp. | |
8 | * | |
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. | |
13 | * | |
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. | |
18 | * | |
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 | |
22 | */ | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/device.h> | |
26 | #include <linux/mm.h> | |
27 | ||
28 | /* | |
29 | * Create the tracepoint static inlines from the kernel to validate that our | |
30 | * trace event macros match the kernel we run on. | |
31 | */ | |
32 | #include <trace/events/writeback.h> | |
33 | ||
34 | #include "../lttng-kernel-version.h" | |
35 | ||
36 | /* #if <check version number if global_dirty_limit will be exported> */ | |
37 | #ifdef CONFIG_KALLSYMS | |
38 | #include "../wrapper/kallsyms.h" | |
39 | ||
40 | static unsigned long *wrapper_global_dirty_limit_sym = 0; | |
41 | static inline | |
42 | unsigned long wrapper_global_dirty_limit(void) | |
43 | { | |
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; | |
49 | else { | |
50 | printk(KERN_WARNING "LTTng: global_dirty_limit symbol lookup failed.\n"); | |
51 | return 0; | |
52 | } | |
53 | } | |
54 | #define global_dirty_limit wrapper_global_dirty_limit() | |
55 | #endif | |
56 | /* #endif <check version number> */ | |
57 | ||
58 | /* | |
59 | * Create LTTng tracepoint probes. | |
60 | */ | |
61 | #define LTTNG_PACKAGE_BUILD | |
62 | #define CREATE_TRACE_POINTS | |
63 | #define TRACE_INCLUDE_PATH ../instrumentation/events/lttng-module | |
64 | ||
65 | #include "../instrumentation/events/lttng-module/writeback.h" | |
66 | ||
67 | MODULE_LICENSE("GPL and additional rights"); | |
68 | MODULE_AUTHOR("Andrew Gabbasov <andrew_gabbasov@mentor.com>"); | |
69 | MODULE_DESCRIPTION("LTTng writeback probes"); |