1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * A generic stack depot implementation
4  *
5  * Author: Alexander Potapenko <glider@google.com>
6  * Copyright (C) 2016 Google, Inc.
7  *
8  * Based on code by Dmitry Chernenkov.
9  */
10 
11 #ifndef _LINUX_STACKDEPOT_H
12 #define _LINUX_STACKDEPOT_H
13 
14 typedef u32 depot_stack_handle_t;
15 
16 depot_stack_handle_t stack_depot_save(unsigned long *entries,
17 				      unsigned int nr_entries, gfp_t gfp_flags);
18 
19 unsigned int stack_depot_fetch(depot_stack_handle_t handle,
20 			       unsigned long **entries);
21 
22 unsigned int filter_irq_stacks(unsigned long *entries, unsigned int nr_entries);
23 
24 #ifdef CONFIG_STACKDEPOT
25 int stack_depot_init(void);
26 #else
stack_depot_init(void)27 static inline int stack_depot_init(void)
28 {
29 	return 0;
30 }
31 #endif	/* CONFIG_STACKDEPOT */
32 
33 #endif
34