| Vineet Gupta | c08098f | 2013-01-18 15:12:21 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/ptrace.h> |
| 10 | #include <linux/export.h> |
| 11 | |
| 12 | /*------------------------------------------------------------------------- |
| 13 | * APIs expected by various kernel sub-systems |
| 14 | *------------------------------------------------------------------------- |
| 15 | */ |
| 16 | |
| 17 | noinline void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs) |
| 18 | { |
| 19 | pr_info("\nStack Trace: NOT Available\n"); |
| 20 | } |
| 21 | EXPORT_SYMBOL(show_stacktrace); |
| 22 | |
| 23 | /* Expected by sched Code */ |
| 24 | void show_stack(struct task_struct *tsk, unsigned long *sp) |
| 25 | { |
| 26 | show_stacktrace(tsk, NULL); |
| 27 | } |
| 28 | |
| 29 | /* Expected by Rest of kernel code */ |
| 30 | void dump_stack(void) |
| 31 | { |
| 32 | show_stacktrace(NULL, NULL); |
| 33 | } |
| 34 | EXPORT_SYMBOL(dump_stack); |
| 35 | |
| 36 | /* Another API expected by schedular, shows up in "ps" as Wait Channel |
| 37 | * Ofcourse just returning schedule( ) would be pointless so unwind until |
| 38 | * the function is not in schedular code |
| 39 | */ |
| 40 | unsigned int get_wchan(struct task_struct *tsk) |
| 41 | { |
| 42 | return 0; |
| 43 | } |