projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| 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"); |