cregit-Linux how code gets into the kernel

Release 4.12 include/linux/torture.h

Directory: include/linux
 * Common functions for in-kernel torture tests.
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you can access it online at
 * Copyright IBM Corporation, 2014
 * Author: Paul E. McKenney <>



#include <linux/types.h>
#include <linux/cache.h>
#include <linux/spinlock.h>
#include <linux/threads.h>
#include <linux/cpumask.h>
#include <linux/seqlock.h>
#include <linux/lockdep.h>
#include <linux/completion.h>
#include <linux/debugobjects.h>
#include <linux/bug.h>
#include <linux/compiler.h>

/* Definitions for a non-string torture-test module parameter. */

#define torture_param(type, name, init, msg) \
	static type name = init; \
        module_param(name, type, 0444); \
        MODULE_PARM_DESC(name, msg);

#define TORTURE_FLAG "-torture:"

#define TOROUT_STRING(s) \
	pr_alert("%s" TORTURE_FLAG " %s\n", torture_type, s)

	do { if (verbose) pr_alert("%s" TORTURE_FLAG " %s\n", torture_type, s); } while (0)

	do { if (verbose) pr_alert("%s" TORTURE_FLAG "!!! %s\n", torture_type, s); } while (0)

/* Definitions for online/offline exerciser. */
bool torture_offline(int cpu, long *n_onl_attempts, long *n_onl_successes,
		     unsigned long *sum_offl, int *min_onl, int *max_onl);
bool torture_online(int cpu, long *n_onl_attempts, long *n_onl_successes,
		    unsigned long *sum_onl, int *min_onl, int *max_onl);
int torture_onoff_init(long ooholdoff, long oointerval);
void torture_onoff_stats(void);
bool torture_onoff_failures(void);

/* Low-rider random number generator. */

struct torture_random_state {
unsigned long trs_state;
long trs_count;

#define DEFINE_TORTURE_RANDOM(name) struct torture_random_state name = { 0, 0 }
unsigned long torture_random(struct torture_random_state *trsp);

/* Task shuffler, which causes CPUs to occasionally go idle. */
void torture_shuffle_task_register(struct task_struct *tp);
int torture_shuffle_init(long shuffint);

/* Test auto-shutdown handling. */
void torture_shutdown_absorb(const char *title);
int torture_shutdown_init(int ssecs, void (*cleanup)(void));

/* Task stuttering, which forces load/no-load transitions. */
void stutter_wait(const char *title);
int torture_stutter_init(int s);

/* Initialization and cleanup. */
bool torture_init_begin(char *ttype, bool v, int *runnable);
void torture_init_end(void);
bool torture_cleanup_begin(void);
void torture_cleanup_end(void);
bool torture_must_stop(void);
bool torture_must_stop_irq(void);
void torture_kthread_stopping(char *title);
int _torture_create_kthread(int (*fn)(void *arg), void *arg, char *s, char *m,
			     char *f, struct task_struct **tp);
void _torture_stop_kthread(char *m, struct task_struct **tp);

#define torture_create_kthread(n, arg, tp) \
	_torture_create_kthread(n, (arg), #n, "Creating " #n " task", \
                                "Failed to create " #n, &(tp))

#define torture_stop_kthread(n, tp) \
	_torture_stop_kthread("Stopping " #n " task", &(tp))

#endif /* __LINUX_TORTURE_H */

Overall Contributors

Paul E. McKenney37297.38%1684.21%
Davidlohr Bueso A71.83%15.26%
Joe Perches20.52%15.26%
SeongJae Park10.26%15.26%
Directory: include/linux
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