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authorStephen Rothwell <sfr@canb.auug.org.au>2008-03-20 12:43:18 +1100
committerStephen Rothwell <sfr@canb.auug.org.au>2008-03-20 12:43:18 +1100
commitb4ece486ae73ef4cbd22030d427ddb50a5332375 (patch)
tree347a37955a85785a40233d5cb13bdf98220680ae /kernel
parent6cd48d2293dd77bab65cd1530345b9d4731fd7b4 (diff)
parent1caff9ba52970a3492bfe8a1b9e26291d34259c5 (diff)
Merge commit 'tests/master'
Conflicts: lib/Kconfig.debug
Diffstat (limited to 'kernel')
-rw-r--r--kernel/Makefile4
-rw-r--r--kernel/backtracetest.c48
-rw-r--r--kernel/rcutorture.c995
-rw-r--r--kernel/rtmutex-tester.c442
-rw-r--r--kernel/test_kprobes.c228
5 files changed, 0 insertions, 1717 deletions
diff --git a/kernel/Makefile b/kernel/Makefile
index 6c584c55a6e9..2c534bceb7d5 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -25,7 +25,6 @@ obj-$(CONFIG_FUTEX) += futex_compat.o
endif
obj-$(CONFIG_RT_MUTEXES) += rtmutex.o
obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o
-obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o
obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
obj-$(CONFIG_SMP) += cpu.o spinlock.o
obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o
@@ -36,7 +35,6 @@ obj-$(CONFIG_KALLSYMS) += kallsyms.o
obj-$(CONFIG_PM) += power/
obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
obj-$(CONFIG_KEXEC) += kexec.o
-obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
obj-$(CONFIG_COMPAT) += compat.o
obj-$(CONFIG_CGROUPS) += cgroup.o
obj-$(CONFIG_CGROUP_DEBUG) += cgroup_debug.o
@@ -48,7 +46,6 @@ obj-$(CONFIG_PID_NS) += pid_namespace.o
obj-$(CONFIG_IKCONFIG) += configs.o
obj-$(CONFIG_RESOURCE_COUNTERS) += res_counter.o
obj-$(CONFIG_STOP_MACHINE) += stop_machine.o
-obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
obj-$(CONFIG_AUDIT) += audit.o auditfilter.o
obj-$(CONFIG_AUDITSYSCALL) += auditsc.o
obj-$(CONFIG_AUDIT_TREE) += audit_tree.o
@@ -56,7 +53,6 @@ obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_DETECT_SOFTLOCKUP) += softlockup.o
obj-$(CONFIG_GENERIC_HARDIRQS) += irq/
obj-$(CONFIG_SECCOMP) += seccomp.o
-obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o
obj-$(CONFIG_CLASSIC_RCU) += rcuclassic.o
obj-$(CONFIG_PREEMPT_RCU) += rcupreempt.o
ifeq ($(CONFIG_PREEMPT_RCU),y)
diff --git a/kernel/backtracetest.c b/kernel/backtracetest.c
deleted file mode 100644
index d1a7605c5b8f..000000000000
--- a/kernel/backtracetest.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Simple stack backtrace regression test module
- *
- * (C) Copyright 2008 Intel Corporation
- * Author: Arjan van de Ven <arjan@linux.intel.com>
- *
- * 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; version 2
- * of the License.
- */
-
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/delay.h>
-
-static struct timer_list backtrace_timer;
-
-static void backtrace_test_timer(unsigned long data)
-{
- printk("Testing a backtrace from irq context.\n");
- printk("The following trace is a kernel self test and not a bug!\n");
- dump_stack();
-}
-static int backtrace_regression_test(void)
-{
- printk("====[ backtrace testing ]===========\n");
- printk("Testing a backtrace from process context.\n");
- printk("The following trace is a kernel self test and not a bug!\n");
- dump_stack();
-
- init_timer(&backtrace_timer);
- backtrace_timer.function = backtrace_test_timer;
- mod_timer(&backtrace_timer, jiffies + 10);
-
- msleep(10);
- printk("====[ end of backtrace testing ]====\n");
- return 0;
-}
-
-static void exitf(void)
-{
-}
-
-module_init(backtrace_regression_test);
-module_exit(exitf);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Arjan van de Ven <arjan@linux.intel.com>");
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
deleted file mode 100644
index fd599829e72a..000000000000
--- a/kernel/rcutorture.c
+++ /dev/null
@@ -1,995 +0,0 @@
-/*
- * Read-Copy Update module-based torture test facility
- *
- * 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
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Copyright (C) IBM Corporation, 2005, 2006
- *
- * Authors: Paul E. McKenney <paulmck@us.ibm.com>
- * Josh Triplett <josh@freedesktop.org>
- *
- * See also: Documentation/RCU/torture.txt
- */
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/kthread.h>
-#include <linux/err.h>
-#include <linux/spinlock.h>
-#include <linux/smp.h>
-#include <linux/rcupdate.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h>
-#include <asm/atomic.h>
-#include <linux/bitops.h>
-#include <linux/completion.h>
-#include <linux/moduleparam.h>
-#include <linux/percpu.h>
-#include <linux/notifier.h>
-#include <linux/freezer.h>
-#include <linux/cpu.h>
-#include <linux/delay.h>
-#include <linux/byteorder/swabb.h>
-#include <linux/stat.h>
-#include <linux/srcu.h>
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Paul E. McKenney <paulmck@us.ibm.com> and "
- "Josh Triplett <josh@freedesktop.org>");
-
-static int nreaders = -1; /* # reader threads, defaults to 2*ncpus */
-static int nfakewriters = 4; /* # fake writer threads */
-static int stat_interval; /* Interval between stats, in seconds. */
- /* Defaults to "only at end of test". */
-static int verbose; /* Print more debug info. */
-static int test_no_idle_hz; /* Test RCU's support for tickless idle CPUs. */
-static int shuffle_interval = 5; /* Interval between shuffles (in sec)*/
-static char *torture_type = "rcu"; /* What RCU implementation to torture. */
-
-module_param(nreaders, int, 0444);
-MODULE_PARM_DESC(nreaders, "Number of RCU reader threads");
-module_param(nfakewriters, int, 0444);
-MODULE_PARM_DESC(nfakewriters, "Number of RCU fake writer threads");
-module_param(stat_interval, int, 0444);
-MODULE_PARM_DESC(stat_interval, "Number of seconds between stats printk()s");
-module_param(verbose, bool, 0444);
-MODULE_PARM_DESC(verbose, "Enable verbose debugging printk()s");
-module_param(test_no_idle_hz, bool, 0444);
-MODULE_PARM_DESC(test_no_idle_hz, "Test support for tickless idle CPUs");
-module_param(shuffle_interval, int, 0444);
-MODULE_PARM_DESC(shuffle_interval, "Number of seconds between shuffles");
-module_param(torture_type, charp, 0444);
-MODULE_PARM_DESC(torture_type, "Type of RCU to torture (rcu, rcu_bh, srcu)");
-
-#define TORTURE_FLAG "-torture:"
-#define PRINTK_STRING(s) \
- do { printk(KERN_ALERT "%s" TORTURE_FLAG s "\n", torture_type); } while (0)
-#define VERBOSE_PRINTK_STRING(s) \
- do { if (verbose) printk(KERN_ALERT "%s" TORTURE_FLAG s "\n", torture_type); } while (0)
-#define VERBOSE_PRINTK_ERRSTRING(s) \
- do { if (verbose) printk(KERN_ALERT "%s" TORTURE_FLAG "!!! " s "\n", torture_type); } while (0)
-
-static char printk_buf[4096];
-
-static int nrealreaders;
-static struct task_struct *writer_task;
-static struct task_struct **fakewriter_tasks;
-static struct task_struct **reader_tasks;
-static struct task_struct *stats_task;
-static struct task_struct *shuffler_task;
-
-#define RCU_TORTURE_PIPE_LEN 10
-
-struct rcu_torture {
- struct rcu_head rtort_rcu;
- int rtort_pipe_count;
- struct list_head rtort_free;
- int rtort_mbtest;
-};
-
-static int fullstop = 0; /* stop generating callbacks at test end. */
-static LIST_HEAD(rcu_torture_freelist);
-static struct rcu_torture *rcu_torture_current = NULL;
-static long rcu_torture_current_version = 0;
-static struct rcu_torture rcu_tortures[10 * RCU_TORTURE_PIPE_LEN];
-static DEFINE_SPINLOCK(rcu_torture_lock);
-static DEFINE_PER_CPU(long [RCU_TORTURE_PIPE_LEN + 1], rcu_torture_count) =
- { 0 };
-static DEFINE_PER_CPU(long [RCU_TORTURE_PIPE_LEN + 1], rcu_torture_batch) =
- { 0 };
-static atomic_t rcu_torture_wcount[RCU_TORTURE_PIPE_LEN + 1];
-static atomic_t n_rcu_torture_alloc;
-static atomic_t n_rcu_torture_alloc_fail;
-static atomic_t n_rcu_torture_free;
-static atomic_t n_rcu_torture_mberror;
-static atomic_t n_rcu_torture_error;
-static struct list_head rcu_torture_removed;
-
-/*
- * Allocate an element from the rcu_tortures pool.
- */
-static struct rcu_torture *
-rcu_torture_alloc(void)
-{
- struct list_head *p;
-
- spin_lock_bh(&rcu_torture_lock);
- if (list_empty(&rcu_torture_freelist)) {
- atomic_inc(&n_rcu_torture_alloc_fail);
- spin_unlock_bh(&rcu_torture_lock);
- return NULL;
- }
- atomic_inc(&n_rcu_torture_alloc);
- p = rcu_torture_freelist.next;
- list_del_init(p);
- spin_unlock_bh(&rcu_torture_lock);
- return container_of(p, struct rcu_torture, rtort_free);
-}
-
-/*
- * Free an element to the rcu_tortures pool.
- */
-static void
-rcu_torture_free(struct rcu_torture *p)
-{
- atomic_inc(&n_rcu_torture_free);
- spin_lock_bh(&rcu_torture_lock);
- list_add_tail(&p->rtort_free, &rcu_torture_freelist);
- spin_unlock_bh(&rcu_torture_lock);
-}
-
-struct rcu_random_state {
- unsigned long rrs_state;
- long rrs_count;
-};
-
-#define RCU_RANDOM_MULT 39916801 /* prime */
-#define RCU_RANDOM_ADD 479001701 /* prime */
-#define RCU_RANDOM_REFRESH 10000
-
-#define DEFINE_RCU_RANDOM(name) struct rcu_random_state name = { 0, 0 }
-
-/*
- * Crude but fast random-number generator. Uses a linear congruential
- * generator, with occasional help from cpu_clock().
- */
-static unsigned long
-rcu_random(struct rcu_random_state *rrsp)
-{
- if (--rrsp->rrs_count < 0) {
- rrsp->rrs_state +=
- (unsigned long)cpu_clock(raw_smp_processor_id());
- rrsp->rrs_count = RCU_RANDOM_REFRESH;
- }
- rrsp->rrs_state = rrsp->rrs_state * RCU_RANDOM_MULT + RCU_RANDOM_ADD;
- return swahw32(rrsp->rrs_state);
-}
-
-/*
- * Operations vector for selecting different types of tests.
- */
-
-struct rcu_torture_ops {
- void (*init)(void);
- void (*cleanup)(void);
- int (*readlock)(void);
- void (*readdelay)(struct rcu_random_state *rrsp);
- void (*readunlock)(int idx);
- int (*completed)(void);
- void (*deferredfree)(struct rcu_torture *p);
- void (*sync)(void);
- int (*stats)(char *page);
- char *name;
-};
-static struct rcu_torture_ops *cur_ops = NULL;
-
-/*
- * Definitions for rcu torture testing.
- */
-
-static int rcu_torture_read_lock(void) __acquires(RCU)
-{
- rcu_read_lock();
- return 0;
-}
-
-static void rcu_read_delay(struct rcu_random_state *rrsp)
-{
- long delay;
- const long longdelay = 200;
-
- /* We want there to be long-running readers, but not all the time. */
-
- delay = rcu_random(rrsp) % (nrealreaders * 2 * longdelay);
- if (!delay)
- udelay(longdelay);
-}
-
-static void rcu_torture_read_unlock(int idx) __releases(RCU)
-{
- rcu_read_unlock();
-}
-
-static int rcu_torture_completed(void)
-{
- return rcu_batches_completed();
-}
-
-static void
-rcu_torture_cb(struct rcu_head *p)
-{
- int i;
- struct rcu_torture *rp = container_of(p, struct rcu_torture, rtort_rcu);
-
- if (fullstop) {
- /* Test is ending, just drop callbacks on the floor. */
- /* The next initialization will pick up the pieces. */
- return;
- }
- i = rp->rtort_pipe_count;
- if (i > RCU_TORTURE_PIPE_LEN)
- i = RCU_TORTURE_PIPE_LEN;
- atomic_inc(&rcu_torture_wcount[i]);
- if (++rp->rtort_pipe_count >= RCU_TORTURE_PIPE_LEN) {
- rp->rtort_mbtest = 0;
- rcu_torture_free(rp);
- } else
- cur_ops->deferredfree(rp);
-}
-
-static void rcu_torture_deferred_free(struct rcu_torture *p)
-{
- call_rcu(&p->rtort_rcu, rcu_torture_cb);
-}
-
-static struct rcu_torture_ops rcu_ops = {
- .init = NULL,
- .cleanup = NULL,
- .readlock = rcu_torture_read_lock,
- .readdelay = rcu_read_delay,
- .readunlock = rcu_torture_read_unlock,
- .completed = rcu_torture_completed,
- .deferredfree = rcu_torture_deferred_free,
- .sync = synchronize_rcu,
- .stats = NULL,
- .name = "rcu"
-};
-
-static void rcu_sync_torture_deferred_free(struct rcu_torture *p)
-{
- int i;
- struct rcu_torture *rp;
- struct rcu_torture *rp1;
-
- cur_ops->sync();
- list_add(&p->rtort_free, &rcu_torture_removed);
- list_for_each_entry_safe(rp, rp1, &rcu_torture_removed, rtort_free) {
- i = rp->rtort_pipe_count;
- if (i > RCU_TORTURE_PIPE_LEN)
- i = RCU_TORTURE_PIPE_LEN;
- atomic_inc(&rcu_torture_wcount[i]);
- if (++rp->rtort_pipe_count >= RCU_TORTURE_PIPE_LEN) {
- rp->rtort_mbtest = 0;
- list_del(&rp->rtort_free);
- rcu_torture_free(rp);
- }
- }
-}
-
-static void rcu_sync_torture_init(void)
-{
- INIT_LIST_HEAD(&rcu_torture_removed);
-}
-
-static struct rcu_torture_ops rcu_sync_ops = {
- .init = rcu_sync_torture_init,
- .cleanup = NULL,
- .readlock = rcu_torture_read_lock,
- .readdelay = rcu_read_delay,
- .readunlock = rcu_torture_read_unlock,
- .completed = rcu_torture_completed,
- .deferredfree = rcu_sync_torture_deferred_free,
- .sync = synchronize_rcu,
- .stats = NULL,
- .name = "rcu_sync"
-};
-
-/*
- * Definitions for rcu_bh torture testing.
- */
-
-static int rcu_bh_torture_read_lock(void) __acquires(RCU_BH)
-{
- rcu_read_lock_bh();
- return 0;
-}
-
-static void rcu_bh_torture_read_unlock(int idx) __releases(RCU_BH)
-{
- rcu_read_unlock_bh();
-}
-
-static int rcu_bh_torture_completed(void)
-{
- return rcu_batches_completed_bh();
-}
-
-static void rcu_bh_torture_deferred_free(struct rcu_torture *p)
-{
- call_rcu_bh(&p->rtort_rcu, rcu_torture_cb);
-}
-
-struct rcu_bh_torture_synchronize {
- struct rcu_head head;
- struct completion completion;
-};
-
-static void rcu_bh_torture_wakeme_after_cb(struct rcu_head *head)
-{
- struct rcu_bh_torture_synchronize *rcu;
-
- rcu = container_of(head, struct rcu_bh_torture_synchronize, head);
- complete(&rcu->completion);
-}
-
-static void rcu_bh_torture_synchronize(void)
-{
- struct rcu_bh_torture_synchronize rcu;
-
- init_completion(&rcu.completion);
- call_rcu_bh(&rcu.head, rcu_bh_torture_wakeme_after_cb);
- wait_for_completion(&rcu.completion);
-}
-
-static struct rcu_torture_ops rcu_bh_ops = {
- .init = NULL,
- .cleanup = NULL,
- .readlock = rcu_bh_torture_read_lock,
- .readdelay = rcu_read_delay, /* just reuse rcu's version. */
- .readunlock = rcu_bh_torture_read_unlock,
- .completed = rcu_bh_torture_completed,
- .deferredfree = rcu_bh_torture_deferred_free,
- .sync = rcu_bh_torture_synchronize,
- .stats = NULL,
- .name = "rcu_bh"
-};
-
-static struct rcu_torture_ops rcu_bh_sync_ops = {
- .init = rcu_sync_torture_init,
- .cleanup = NULL,
- .readlock = rcu_bh_torture_read_lock,
- .readdelay = rcu_read_delay, /* just reuse rcu's version. */
- .readunlock = rcu_bh_torture_read_unlock,
- .completed = rcu_bh_torture_completed,
- .deferredfree = rcu_sync_torture_deferred_free,
- .sync = rcu_bh_torture_synchronize,
- .stats = NULL,
- .name = "rcu_bh_sync"
-};
-
-/*
- * Definitions for srcu torture testing.
- */
-
-static struct srcu_struct srcu_ctl;
-
-static void srcu_torture_init(void)
-{
- init_srcu_struct(&srcu_ctl);
- rcu_sync_torture_init();
-}
-
-static void srcu_torture_cleanup(void)
-{
- synchronize_srcu(&srcu_ctl);
- cleanup_srcu_struct(&srcu_ctl);
-}
-
-static int srcu_torture_read_lock(void) __acquires(&srcu_ctl)
-{
- return srcu_read_lock(&srcu_ctl);
-}
-
-static void srcu_read_delay(struct rcu_random_state *rrsp)
-{
- long delay;
- const long uspertick = 1000000 / HZ;
- const long longdelay = 10;
-
- /* We want there to be long-running readers, but not all the time. */
-
- delay = rcu_random(rrsp) % (nrealreaders * 2 * longdelay * uspertick);
- if (!delay)
- schedule_timeout_interruptible(longdelay);
-}
-
-static void srcu_torture_read_unlock(int idx) __releases(&srcu_ctl)
-{
- srcu_read_unlock(&srcu_ctl, idx);
-}
-
-static int srcu_torture_completed(void)
-{
- return srcu_batches_completed(&srcu_ctl);
-}
-
-static void srcu_torture_synchronize(void)
-{
- synchronize_srcu(&srcu_ctl);
-}
-
-static int srcu_torture_stats(char *page)
-{
- int cnt = 0;
- int cpu;
- int idx = srcu_ctl.completed & 0x1;
-
- cnt += sprintf(&page[cnt], "%s%s per-CPU(idx=%d):",
- torture_type, TORTURE_FLAG, idx);
- for_each_possible_cpu(cpu) {
- cnt += sprintf(&page[cnt], " %d(%d,%d)", cpu,
- per_cpu_ptr(srcu_ctl.per_cpu_ref, cpu)->c[!idx],
- per_cpu_ptr(srcu_ctl.per_cpu_ref, cpu)->c[idx]);
- }
- cnt += sprintf(&page[cnt], "\n");
- return cnt;
-}
-
-static struct rcu_torture_ops srcu_ops = {
- .init = srcu_torture_init,
- .cleanup = srcu_torture_cleanup,
- .readlock = srcu_torture_read_lock,
- .readdelay = srcu_read_delay,
- .readunlock = srcu_torture_read_unlock,
- .completed = srcu_torture_completed,
- .deferredfree = rcu_sync_torture_deferred_free,
- .sync = srcu_torture_synchronize,
- .stats = srcu_torture_stats,
- .name = "srcu"
-};
-
-/*
- * Definitions for sched torture testing.
- */
-
-static int sched_torture_read_lock(void)
-{
- preempt_disable();
- return 0;
-}
-
-static void sched_torture_read_unlock(int idx)
-{
- preempt_enable();
-}
-
-static int sched_torture_completed(void)
-{
- return 0;
-}
-
-static void sched_torture_synchronize(void)
-{
- synchronize_sched();
-}
-
-static struct rcu_torture_ops sched_ops = {
- .init = rcu_sync_torture_init,
- .cleanup = NULL,
- .readlock = sched_torture_read_lock,
- .readdelay = rcu_read_delay, /* just reuse rcu's version. */
- .readunlock = sched_torture_read_unlock,
- .completed = sched_torture_completed,
- .deferredfree = rcu_sync_torture_deferred_free,
- .sync = sched_torture_synchronize,
- .stats = NULL,
- .name = "sched"
-};
-
-/*
- * RCU torture writer kthread. Repeatedly substitutes a new structure
- * for that pointed to by rcu_torture_current, freeing the old structure
- * after a series of grace periods (the "pipeline").
- */
-static int
-rcu_torture_writer(void *arg)
-{
- int i;
- long oldbatch = rcu_batches_completed();
- struct rcu_torture *rp;
- struct rcu_torture *old_rp;
- static DEFINE_RCU_RANDOM(rand);
-
- VERBOSE_PRINTK_STRING("rcu_torture_writer task started");
- set_user_nice(current, 19);
-
- do {
- schedule_timeout_uninterruptible(1);
- if ((rp = rcu_torture_alloc()) == NULL)
- continue;
- rp->rtort_pipe_count = 0;
- udelay(rcu_random(&rand) & 0x3ff);
- old_rp = rcu_torture_current;
- rp->rtort_mbtest = 1;
- rcu_assign_pointer(rcu_torture_current, rp);
- smp_wmb();
- if (old_rp) {
- i = old_rp->rtort_pipe_count;
- if (i > RCU_TORTURE_PIPE_LEN)
- i = RCU_TORTURE_PIPE_LEN;
- atomic_inc(&rcu_torture_wcount[i]);
- old_rp->rtort_pipe_count++;
- cur_ops->deferredfree(old_rp);
- }
- rcu_torture_current_version++;
- oldbatch = cur_ops->completed();
- } while (!kthread_should_stop() && !fullstop);
- VERBOSE_PRINTK_STRING("rcu_torture_writer task stopping");
- while (!kthread_should_stop())
- schedule_timeout_uninterruptible(1);
- return 0;
-}
-
-/*
- * RCU torture fake writer kthread. Repeatedly calls sync, with a random
- * delay between calls.
- */
-static int
-rcu_torture_fakewriter(void *arg)
-{
- DEFINE_RCU_RANDOM(rand);
-
- VERBOSE_PRINTK_STRING("rcu_torture_fakewriter task started");
- set_user_nice(current, 19);
-
- do {
- schedule_timeout_uninterruptible(1 + rcu_random(&rand)%10);
- udelay(rcu_random(&rand) & 0x3ff);
- cur_ops->sync();
- } while (!kthread_should_stop() && !fullstop);
-
- VERBOSE_PRINTK_STRING("rcu_torture_fakewriter task stopping");
- while (!kthread_should_stop())
- schedule_timeout_uninterruptible(1);
- return 0;
-}
-
-/*
- * RCU torture reader kthread. Repeatedly dereferences rcu_torture_current,
- * incrementing the corresponding element of the pipeline array. The
- * counter in the element should never be greater than 1, otherwise, the
- * RCU implementation is broken.
- */
-static int
-rcu_torture_reader(void *arg)
-{
- int completed;
- int idx;
- DEFINE_RCU_RANDOM(rand);
- struct rcu_torture *p;
- int pipe_count;
-
- VERBOSE_PRINTK_STRING("rcu_torture_reader task started");
- set_user_nice(current, 19);
-
- do {
- idx = cur_ops->readlock();
- completed = cur_ops->completed();
- p = rcu_dereference(rcu_torture_current);
- if (p == NULL) {
- /* Wait for rcu_torture_writer to get underway */
- cur_ops->readunlock(idx);
- schedule_timeout_interruptible(HZ);
- continue;
- }
- if (p->rtort_mbtest == 0)
- atomic_inc(&n_rcu_torture_mberror);
- cur_ops->readdelay(&rand);
- preempt_disable();
- pipe_count = p->rtort_pipe_count;
- if (pipe_count > RCU_TORTURE_PIPE_LEN) {
- /* Should not happen, but... */
- pipe_count = RCU_TORTURE_PIPE_LEN;
- }
- ++__get_cpu_var(rcu_torture_count)[pipe_count];
- completed = cur_ops->completed() - completed;
- if (completed > RCU_TORTURE_PIPE_LEN) {
- /* Should not happen, but... */
- completed = RCU_TORTURE_PIPE_LEN;
- }
- ++__get_cpu_var(rcu_torture_batch)[completed];
- preempt_enable();
- cur_ops->readunlock(idx);
- schedule();
- } while (!kthread_should_stop() && !fullstop);
- VERBOSE_PRINTK_STRING("rcu_torture_reader task stopping");
- while (!kthread_should_stop())
- schedule_timeout_uninterruptible(1);
- return 0;
-}
-
-/*
- * Create an RCU-torture statistics message in the specified buffer.
- */
-static int
-rcu_torture_printk(char *page)
-{
- int cnt = 0;
- int cpu;
- int i;
- long pipesummary[RCU_TORTURE_PIPE_LEN + 1] = { 0 };
- long batchsummary[RCU_TORTURE_PIPE_LEN + 1] = { 0 };
-
- for_each_possible_cpu(cpu) {
- for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) {
- pipesummary[i] += per_cpu(rcu_torture_count, cpu)[i];
- batchsummary[i] += per_cpu(rcu_torture_batch, cpu)[i];
- }
- }
- for (i = RCU_TORTURE_PIPE_LEN - 1; i >= 0; i--) {
- if (pipesummary[i] != 0)
- break;
- }
- cnt += sprintf(&page[cnt], "%s%s ", torture_type, TORTURE_FLAG);
- cnt += sprintf(&page[cnt],
- "rtc: %p ver: %ld tfle: %d rta: %d rtaf: %d rtf: %d "
- "rtmbe: %d",
- rcu_torture_current,
- rcu_torture_current_version,
- list_empty(&rcu_torture_freelist),
- atomic_read(&n_rcu_torture_alloc),
- atomic_read(&n_rcu_torture_alloc_fail),
- atomic_read(&n_rcu_torture_free),
- atomic_read(&n_rcu_torture_mberror));
- if (atomic_read(&n_rcu_torture_mberror) != 0)
- cnt += sprintf(&page[cnt], " !!!");
- cnt += sprintf(&page[cnt], "\n%s%s ", torture_type, TORTURE_FLAG);
- if (i > 1) {
- cnt += sprintf(&page[cnt], "!!! ");
- atomic_inc(&n_rcu_torture_error);
- }
- cnt += sprintf(&page[cnt], "Reader Pipe: ");
- for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++)
- cnt += sprintf(&page[cnt], " %ld", pipesummary[i]);
- cnt += sprintf(&page[cnt], "\n%s%s ", torture_type, TORTURE_FLAG);
- cnt += sprintf(&page[cnt], "Reader Batch: ");
- for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++)
- cnt += sprintf(&page[cnt], " %ld", batchsummary[i]);
- cnt += sprintf(&page[cnt], "\n%s%s ", torture_type, TORTURE_FLAG);
- cnt += sprintf(&page[cnt], "Free-Block Circulation: ");
- for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) {
- cnt += sprintf(&page[cnt], " %d",
- atomic_read(&rcu_torture_wcount[i]));
- }
- cnt += sprintf(&page[cnt], "\n");
- if (cur_ops->stats)
- cnt += cur_ops->stats(&page[cnt]);
- return cnt;
-}
-
-/*
- * Print torture statistics. Caller must ensure that there is only
- * one call to this function at a given time!!! This is normally
- * accomplished by relying on the module system to only have one copy
- * of the module loaded, and then by giving the rcu_torture_stats
- * kthread full control (or the init/cleanup functions when rcu_torture_stats
- * thread is not running).
- */
-static void
-rcu_torture_stats_print(void)
-{
- int cnt;
-
- cnt = rcu_torture_printk(printk_buf);
- printk(KERN_ALERT "%s", printk_buf);
-}
-
-/*
- * Periodically prints torture statistics, if periodic statistics printing
- * was specified via the stat_interval module parameter.
- *
- * No need to worry about fullstop here, since this one doesn't reference
- * volatile state or register callbacks.
- */
-static int
-rcu_torture_stats(void *arg)
-{
- VERBOSE_PRINTK_STRING("rcu_torture_stats task started");
- do {
- schedule_timeout_interruptible(stat_interval * HZ);
- rcu_torture_stats_print();
- } while (!kthread_should_stop());
- VERBOSE_PRINTK_STRING("rcu_torture_stats task stopping");
- return 0;
-}
-
-static int rcu_idle_cpu; /* Force all torture tasks off this CPU */
-
-/* Shuffle tasks such that we allow @rcu_idle_cpu to become idle. A special case
- * is when @rcu_idle_cpu = -1, when we allow the tasks to run on all CPUs.
- */
-static void rcu_torture_shuffle_tasks(void)
-{
- cpumask_t tmp_mask = CPU_MASK_ALL;
- int i;
-
- get_online_cpus();
-
- /* No point in shuffling if there is only one online CPU (ex: UP) */
- if (num_online_cpus() == 1) {
- put_online_cpus();
- return;
- }
-
- if (rcu_idle_cpu != -1)
- cpu_clear(rcu_idle_cpu, tmp_mask);
-
- set_cpus_allowed(current, tmp_mask);
-
- if (reader_tasks) {
- for (i = 0; i < nrealreaders; i++)
- if (reader_tasks[i])
- set_cpus_allowed(reader_tasks[i], tmp_mask);
- }
-
- if (fakewriter_tasks) {
- for (i = 0; i < nfakewriters; i++)
- if (fakewriter_tasks[i])
- set_cpus_allowed(fakewriter_tasks[i], tmp_mask);
- }
-
- if (writer_task)
- set_cpus_allowed(writer_task, tmp_mask);
-
- if (stats_task)
- set_cpus_allowed(stats_task, tmp_mask);
-
- if (rcu_idle_cpu == -1)
- rcu_idle_cpu = num_online_cpus() - 1;
- else
- rcu_idle_cpu--;
-
- put_online_cpus();
-}
-
-/* Shuffle tasks across CPUs, with the intent of allowing each CPU in the
- * system to become idle at a time and cut off its timer ticks. This is meant
- * to test the support for such tickless idle CPU in RCU.
- */
-static int
-rcu_torture_shuffle(void *arg)
-{
- VERBOSE_PRINTK_STRING("rcu_torture_shuffle task started");
- do {
- schedule_timeout_interruptible(shuffle_interval * HZ);
- rcu_torture_shuffle_tasks();
- } while (!kthread_should_stop());
- VERBOSE_PRINTK_STRING("rcu_torture_shuffle task stopping");
- return 0;
-}
-
-static inline void
-rcu_torture_print_module_parms(char *tag)
-{
- printk(KERN_ALERT "%s" TORTURE_FLAG
- "--- %s: nreaders=%d nfakewriters=%d "
- "stat_interval=%d verbose=%d test_no_idle_hz=%d "
- "shuffle_interval = %d\n",
- torture_type, tag, nrealreaders, nfakewriters,
- stat_interval, verbose, test_no_idle_hz, shuffle_interval);
-}
-
-static void
-rcu_torture_cleanup(void)
-{
- int i;
-
- fullstop = 1;
- if (shuffler_task) {
- VERBOSE_PRINTK_STRING("Stopping rcu_torture_shuffle task");
- kthread_stop(shuffler_task);
- }
- shuffler_task = NULL;
-
- if (writer_task) {
- VERBOSE_PRINTK_STRING("Stopping rcu_torture_writer task");
- kthread_stop(writer_task);
- }
- writer_task = NULL;
-
- if (reader_tasks) {
- for (i = 0; i < nrealreaders; i++) {
- if (reader_tasks[i]) {
- VERBOSE_PRINTK_STRING(
- "Stopping rcu_torture_reader task");
- kthread_stop(reader_tasks[i]);
- }
- reader_tasks[i] = NULL;
- }
- kfree(reader_tasks);
- reader_tasks = NULL;
- }
- rcu_torture_current = NULL;
-
- if (fakewriter_tasks) {
- for (i = 0; i < nfakewriters; i++) {
- if (fakewriter_tasks[i]) {
- VERBOSE_PRINTK_STRING(
- "Stopping rcu_torture_fakewriter task");
- kthread_stop(fakewriter_tasks[i]);
- }
- fakewriter_tasks[i] = NULL;
- }
- kfree(fakewriter_tasks);
- fakewriter_tasks = NULL;
- }
-
- if (stats_task) {
- VERBOSE_PRINTK_STRING("Stopping rcu_torture_stats task");
- kthread_stop(stats_task);
- }
- stats_task = NULL;
-
- /* Wait for all RCU callbacks to fire. */
- rcu_barrier();
-
- rcu_torture_stats_print(); /* -After- the stats thread is stopped! */
-
- if (cur_ops->cleanup)
- cur_ops->cleanup();
- if (atomic_read(&n_rcu_torture_error))
- rcu_torture_print_module_parms("End of test: FAILURE");
- else
- rcu_torture_print_module_parms("End of test: SUCCESS");
-}
-
-static int __init
-rcu_torture_init(void)
-{
- int i;
- int cpu;
- int firsterr = 0;
- static struct rcu_torture_ops *torture_ops[] =
- { &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &rcu_bh_sync_ops,
- &srcu_ops, &sched_ops, };
-
- /* Process args and tell the world that the torturer is on the job. */
- for (i = 0; i < ARRAY_SIZE(torture_ops); i++) {
- cur_ops = torture_ops[i];
- if (strcmp(torture_type, cur_ops->name) == 0)
- break;
- }
- if (i == ARRAY_SIZE(torture_ops)) {
- printk(KERN_ALERT "rcutorture: invalid torture type: \"%s\"\n",
- torture_type);
- return (-EINVAL);
- }
- if (cur_ops->init)
- cur_ops->init(); /* no "goto unwind" prior to this point!!! */
-
- if (nreaders >= 0)
- nrealreaders = nreaders;
- else
- nrealreaders = 2 * num_online_cpus();
- rcu_torture_print_module_parms("Start of test");
- fullstop = 0;
-
- /* Set up the freelist. */
-
- INIT_LIST_HEAD(&rcu_torture_freelist);
- for (i = 0; i < ARRAY_SIZE(rcu_tortures); i++) {
- rcu_tortures[i].rtort_mbtest = 0;
- list_add_tail(&rcu_tortures[i].rtort_free,
- &rcu_torture_freelist);
- }
-
- /* Initialize the statistics so that each run gets its own numbers. */
-
- rcu_torture_current = NULL;
- rcu_torture_current_version = 0;
- atomic_set(&n_rcu_torture_alloc, 0);
- atomic_set(&n_rcu_torture_alloc_fail, 0);
- atomic_set(&n_rcu_torture_free, 0);
- atomic_set(&n_rcu_torture_mberror, 0);
- atomic_set(&n_rcu_torture_error, 0);
- for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++)
- atomic_set(&rcu_torture_wcount[i], 0);
- for_each_possible_cpu(cpu) {
- for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) {
- per_cpu(rcu_torture_count, cpu)[i] = 0;
- per_cpu(rcu_torture_batch, cpu)[i] = 0;
- }
- }
-
- /* Start up the kthreads. */
-
- VERBOSE_PRINTK_STRING("Creating rcu_torture_writer task");
- writer_task = kthread_run(rcu_torture_writer, NULL,
- "rcu_torture_writer");
- if (IS_ERR(writer_task)) {
- firsterr = PTR_ERR(writer_task);
- VERBOSE_PRINTK_ERRSTRING("Failed to create writer");
- writer_task = NULL;
- goto unwind;
- }
- fakewriter_tasks = kzalloc(nfakewriters * sizeof(fakewriter_tasks[0]),
- GFP_KERNEL);
- if (fakewriter_tasks == NULL) {
- VERBOSE_PRINTK_ERRSTRING("out of memory");
- firsterr = -ENOMEM;
- goto unwind;
- }
- for (i = 0; i < nfakewriters; i++) {
- VERBOSE_PRINTK_STRING("Creating rcu_torture_fakewriter task");
- fakewriter_tasks[i] = kthread_run(rcu_torture_fakewriter, NULL,
- "rcu_torture_fakewriter");
- if (IS_ERR(fakewriter_tasks[i])) {
- firsterr = PTR_ERR(fakewriter_tasks[i]);
- VERBOSE_PRINTK_ERRSTRING("Failed to create fakewriter");
- fakewriter_tasks[i] = NULL;
- goto unwind;
- }
- }
- reader_tasks = kzalloc(nrealreaders * sizeof(reader_tasks[0]),
- GFP_KERNEL);
- if (reader_tasks == NULL) {
- VERBOSE_PRINTK_ERRSTRING("out of memory");
- firsterr = -ENOMEM;
- goto unwind;
- }
- for (i = 0; i < nrealreaders; i++) {
- VERBOSE_PRINTK_STRING("Creating rcu_torture_reader task");
- reader_tasks[i] = kthread_run(rcu_torture_reader, NULL,
- "rcu_torture_reader");
- if (IS_ERR(reader_tasks[i])) {
- firsterr = PTR_ERR(reader_tasks[i]);
- VERBOSE_PRINTK_ERRSTRING("Failed to create reader");
- reader_tasks[i] = NULL;
- goto unwind;
- }
- }
- if (stat_interval > 0) {
- VERBOSE_PRINTK_STRING("Creating rcu_torture_stats task");
- stats_task = kthread_run(rcu_torture_stats, NULL,
- "rcu_torture_stats");
- if (IS_ERR(stats_task)) {
- firsterr = PTR_ERR(stats_task);
- VERBOSE_PRINTK_ERRSTRING("Failed to create stats");
- stats_task = NULL;
- goto unwind;
- }
- }
- if (test_no_idle_hz) {
- rcu_idle_cpu = num_online_cpus() - 1;
- /* Create the shuffler thread */
- shuffler_task = kthread_run(rcu_torture_shuffle, NULL,
- "rcu_torture_shuffle");
- if (IS_ERR(shuffler_task)) {
- firsterr = PTR_ERR(shuffler_task);
- VERBOSE_PRINTK_ERRSTRING("Failed to create shuffler");
- shuffler_task = NULL;
- goto unwind;
- }
- }
- return 0;
-
-unwind:
- rcu_torture_cleanup();
- return firsterr;
-}
-
-module_init(rcu_torture_init);
-module_exit(rcu_torture_cleanup);
diff --git a/kernel/rtmutex-tester.c b/kernel/rtmutex-tester.c
deleted file mode 100644
index 092e4c620af9..000000000000
--- a/kernel/rtmutex-tester.c
+++ /dev/null
@@ -1,442 +0,0 @@
-/*
- * RT-Mutex-tester: scriptable tester for rt mutexes
- *
- * started by Thomas Gleixner:
- *
- * Copyright (C) 2006, Timesys Corp., Thomas Gleixner <tglx@timesys.com>
- *
- */
-#include <linux/kthread.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/smp_lock.h>
-#include <linux/spinlock.h>
-#include <linux/sysdev.h>
-#include <linux/timer.h>
-#include <linux/freezer.h>
-
-#include "rtmutex.h"
-
-#define MAX_RT_TEST_THREADS 8
-#define MAX_RT_TEST_MUTEXES 8
-
-static spinlock_t rttest_lock;
-static atomic_t rttest_event;
-
-struct test_thread_data {
- int opcode;
- int opdata;
- int mutexes[MAX_RT_TEST_MUTEXES];
- int bkl;
- int event;
- struct sys_device sysdev;
-};
-
-static struct test_thread_data thread_data[MAX_RT_TEST_THREADS];
-static struct task_struct *threads[MAX_RT_TEST_THREADS];
-static struct rt_mutex mutexes[MAX_RT_TEST_MUTEXES];
-
-enum test_opcodes {
- RTTEST_NOP = 0,
- RTTEST_SCHEDOT, /* 1 Sched other, data = nice */
- RTTEST_SCHEDRT, /* 2 Sched fifo, data = prio */
- RTTEST_LOCK, /* 3 Lock uninterruptible, data = lockindex */
- RTTEST_LOCKNOWAIT, /* 4 Lock uninterruptible no wait in wakeup, data = lockindex */
- RTTEST_LOCKINT, /* 5 Lock interruptible, data = lockindex */
- RTTEST_LOCKINTNOWAIT, /* 6 Lock interruptible no wait in wakeup, data = lockindex */
- RTTEST_LOCKCONT, /* 7 Continue locking after the wakeup delay */
- RTTEST_UNLOCK, /* 8 Unlock, data = lockindex */
- RTTEST_LOCKBKL, /* 9 Lock BKL */
- RTTEST_UNLOCKBKL, /* 10 Unlock BKL */
- RTTEST_SIGNAL, /* 11 Signal other test thread, data = thread id */
- RTTEST_RESETEVENT = 98, /* 98 Reset event counter */
- RTTEST_RESET = 99, /* 99 Reset all pending operations */
-};
-
-static int handle_op(struct test_thread_data *td, int lockwakeup)
-{
- int i, id, ret = -EINVAL;
-
- switch(td->opcode) {
-
- case RTTEST_NOP:
- return 0;
-
- case RTTEST_LOCKCONT:
- td->mutexes[td->opdata] = 1;
- td->event = atomic_add_return(1, &rttest_event);
- return 0;
-
- case RTTEST_RESET:
- for (i = 0; i < MAX_RT_TEST_MUTEXES; i++) {
- if (td->mutexes[i] == 4) {
- rt_mutex_unlock(&mutexes[i]);
- td->mutexes[i] = 0;
- }
- }
-
- if (!lockwakeup && td->bkl == 4) {
- unlock_kernel();
- td->bkl = 0;
- }
- return 0;
-
- case RTTEST_RESETEVENT:
- atomic_set(&rttest_event, 0);
- return 0;
-
- default:
- if (lockwakeup)
- return ret;
- }
-
- switch(td->opcode) {
-
- case RTTEST_LOCK:
- case RTTEST_LOCKNOWAIT:
- id = td->opdata;
- if (id < 0 || id >= MAX_RT_TEST_MUTEXES)
- return ret;
-
- td->mutexes[id] = 1;
- td->event = atomic_add_return(1, &rttest_event);
- rt_mutex_lock(&mutexes[id]);
- td->event = atomic_add_return(1, &rttest_event);
- td->mutexes[id] = 4;
- return 0;
-
- case RTTEST_LOCKINT:
- case RTTEST_LOCKINTNOWAIT:
- id = td->opdata;
- if (id < 0 || id >= MAX_RT_TEST_MUTEXES)
- return ret;
-
- td->mutexes[id] = 1;
- td->event = atomic_add_return(1, &rttest_event);
- ret = rt_mutex_lock_interruptible(&mutexes[id], 0);
- td->event = atomic_add_return(1, &rttest_event);
- td->mutexes[id] = ret ? 0 : 4;
- return ret ? -EINTR : 0;
-
- case RTTEST_UNLOCK:
- id = td->opdata;
- if (id < 0 || id >= MAX_RT_TEST_MUTEXES || td->mutexes[id] != 4)
- return ret;
-
- td->event = atomic_add_return(1, &rttest_event);
- rt_mutex_unlock(&mutexes[id]);
- td->event = atomic_add_return(1, &rttest_event);
- td->mutexes[id] = 0;
- return 0;
-
- case RTTEST_LOCKBKL:
- if (td->bkl)
- return 0;
- td->bkl = 1;
- lock_kernel();
- td->bkl = 4;
- return 0;
-
- case RTTEST_UNLOCKBKL:
- if (td->bkl != 4)
- break;
- unlock_kernel();
- td->bkl = 0;
- return 0;
-
- default:
- break;
- }
- return ret;
-}
-
-/*
- * Schedule replacement for rtsem_down(). Only called for threads with
- * PF_MUTEX_TESTER set.
- *
- * This allows us to have finegrained control over the event flow.
- *
- */
-void schedule_rt_mutex_test(struct rt_mutex *mutex)
-{
- int tid, op, dat;
- struct test_thread_data *td;
-
- /* We have to lookup the task */
- for (tid = 0; tid < MAX_RT_TEST_THREADS; tid++) {
- if (threads[tid] == current)
- break;
- }
-
- BUG_ON(tid == MAX_RT_TEST_THREADS);
-
- td = &thread_data[tid];
-
- op = td->opcode;
- dat = td->opdata;
-
- switch (op) {
- case RTTEST_LOCK:
- case RTTEST_LOCKINT:
- case RTTEST_LOCKNOWAIT:
- case RTTEST_LOCKINTNOWAIT:
- if (mutex != &mutexes[dat])
- break;
-
- if (td->mutexes[dat] != 1)
- break;
-
- td->mutexes[dat] = 2;
- td->event = atomic_add_return(1, &rttest_event);
- break;
-
- case RTTEST_LOCKBKL:
- default:
- break;
- }
-
- schedule();
-
-
- switch (op) {
- case RTTEST_LOCK:
- case RTTEST_LOCKINT:
- if (mutex != &mutexes[dat])
- return;
-
- if (td->mutexes[dat] != 2)
- return;
-
- td->mutexes[dat] = 3;
- td->event = atomic_add_return(1, &rttest_event);
- break;
-
- case RTTEST_LOCKNOWAIT:
- case RTTEST_LOCKINTNOWAIT:
- if (mutex != &mutexes[dat])
- return;
-
- if (td->mutexes[dat] != 2)
- return;
-
- td->mutexes[dat] = 1;
- td->event = atomic_add_return(1, &rttest_event);
- return;
-
- case RTTEST_LOCKBKL:
- return;
- default:
- return;
- }
-
- td->opcode = 0;
-
- for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
-
- if (td->opcode > 0) {
- int ret;
-
- set_current_state(TASK_RUNNING);
- ret = handle_op(td, 1);
- set_current_state(TASK_INTERRUPTIBLE);
- if (td->opcode == RTTEST_LOCKCONT)
- break;
- td->opcode = ret;
- }
-
- /* Wait for the next command to be executed */
- schedule();
- }
-
- /* Restore previous command and data */
- td->opcode = op;
- td->opdata = dat;
-}
-
-static int test_func(void *data)
-{
- struct test_thread_data *td = data;
- int ret;
-
- current->flags |= PF_MUTEX_TESTER;
- set_freezable();
- allow_signal(SIGHUP);
-
- for(;;) {
-
- set_current_state(TASK_INTERRUPTIBLE);
-
- if (td->opcode > 0) {
- set_current_state(TASK_RUNNING);
- ret = handle_op(td, 0);
- set_current_state(TASK_INTERRUPTIBLE);
- td->opcode = ret;
- }
-
- /* Wait for the next command to be executed */
- schedule();
- try_to_freeze();
-
- if (signal_pending(current))
- flush_signals(current);
-
- if(kthread_should_stop())
- break;
- }
- return 0;
-}
-
-/**
- * sysfs_test_command - interface for test commands
- * @dev: thread reference
- * @buf: command for actual step
- * @count: length of buffer
- *
- * command syntax:
- *
- * opcode:data
- */
-static ssize_t sysfs_test_command(struct sys_device *dev, const char *buf,
- size_t count)
-{
- struct sched_param schedpar;
- struct test_thread_data *td;
- char cmdbuf[32];
- int op, dat, tid, ret;
-
- td = container_of(dev, struct test_thread_data, sysdev);
- tid = td->sysdev.id;
-
- /* strings from sysfs write are not 0 terminated! */
- if (count >= sizeof(cmdbuf))
- return -EINVAL;
-
- /* strip of \n: */
- if (buf[count-1] == '\n')
- count--;
- if (count < 1)
- return -EINVAL;
-
- memcpy(cmdbuf, buf, count);
- cmdbuf[count] = 0;
-
- if (sscanf(cmdbuf, "%d:%d", &op, &dat) != 2)
- return -EINVAL;
-
- switch (op) {
- case RTTEST_SCHEDOT:
- schedpar.sched_priority = 0;
- ret = sched_setscheduler(threads[tid], SCHED_NORMAL, &schedpar);
- if (ret)
- return ret;
- set_user_nice(current, 0);
- break;
-
- case RTTEST_SCHEDRT:
- schedpar.sched_priority = dat;
- ret = sched_setscheduler(threads[tid], SCHED_FIFO, &schedpar);
- if (ret)
- return ret;
- break;
-
- case RTTEST_SIGNAL:
- send_sig(SIGHUP, threads[tid], 0);
- break;
-
- default:
- if (td->opcode > 0)
- return -EBUSY;
- td->opdata = dat;
- td->opcode = op;
- wake_up_process(threads[tid]);
- }
-
- return count;
-}
-
-/**
- * sysfs_test_status - sysfs interface for rt tester
- * @dev: thread to query
- * @buf: char buffer to be filled with thread status info
- */
-static ssize_t sysfs_test_status(struct sys_device *dev, char *buf)
-{
- struct test_thread_data *td;
- struct task_struct *tsk;
- char *curr = buf;
- int i;
-
- td = container_of(dev, struct test_thread_data, sysdev);
- tsk = threads[td->sysdev.id];
-
- spin_lock(&rttest_lock);
-
- curr += sprintf(curr,
- "O: %4d, E:%8d, S: 0x%08lx, P: %4d, N: %4d, B: %p, K: %d, M:",
- td->opcode, td->event, tsk->state,
- (MAX_RT_PRIO - 1) - tsk->prio,
- (MAX_RT_PRIO - 1) - tsk->normal_prio,
- tsk->pi_blocked_on, td->bkl);
-
- for (i = MAX_RT_TEST_MUTEXES - 1; i >=0 ; i--)
- curr += sprintf(curr, "%d", td->mutexes[i]);
-
- spin_unlock(&rttest_lock);
-
- curr += sprintf(curr, ", T: %p, R: %p\n", tsk,
- mutexes[td->sysdev.id].owner);
-
- return curr - buf;
-}
-
-static SYSDEV_ATTR(status, 0600, sysfs_test_status, NULL);
-static SYSDEV_ATTR(command, 0600, NULL, sysfs_test_command);
-
-static struct sysdev_class rttest_sysclass = {
- .name = "rttest",
-};
-
-static int init_test_thread(int id)
-{
- thread_data[id].sysdev.cls = &rttest_sysclass;
- thread_data[id].sysdev.id = id;
-
- threads[id] = kthread_run(test_func, &thread_data[id], "rt-test-%d", id);
- if (IS_ERR(threads[id]))
- return PTR_ERR(threads[id]);
-
- return sysdev_register(&thread_data[id].sysdev);
-}
-
-static int init_rttest(void)
-{
- int ret, i;
-
- spin_lock_init(&rttest_lock);
-
- for (i = 0; i < MAX_RT_TEST_MUTEXES; i++)
- rt_mutex_init(&mutexes[i]);
-
- ret = sysdev_class_register(&rttest_sysclass);
- if (ret)
- return ret;
-
- for (i = 0; i < MAX_RT_TEST_THREADS; i++) {
- ret = init_test_thread(i);
- if (ret)
- break;
- ret = sysdev_create_file(&thread_data[i].sysdev, &attr_status);
- if (ret)
- break;
- ret = sysdev_create_file(&thread_data[i].sysdev, &attr_command);
- if (ret)
- break;
- }
-
- printk("Initializing RT-Tester: %s\n", ret ? "Failed" : "OK" );
-
- return ret;
-}
-
-device_initcall(init_rttest);
diff --git a/kernel/test_kprobes.c b/kernel/test_kprobes.c
deleted file mode 100644
index 06b6395b45b2..000000000000
--- a/kernel/test_kprobes.c
+++ /dev/null
@@ -1,228 +0,0 @@
-/*
- * test_kprobes.c - simple sanity test for *probes
- *
- * Copyright IBM Corp. 2008
- *
- * 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 would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU General Public License for more details.
- */
-
-#include <linux/kernel.h>
-#include <linux/kprobes.h>
-#include <linux/random.h>
-
-#define div_factor 3
-
-static u32 rand1, preh_val, posth_val, jph_val;
-static int errors, handler_errors, num_tests;
-
-static noinline u32 kprobe_target(u32 value)
-{
- /*
- * gcc ignores noinline on some architectures unless we stuff
- * sufficient lard into the function. The get_kprobe() here is
- * just for that.
- *
- * NOTE: We aren't concerned about the correctness of get_kprobe()
- * here; hence, this call is neither under !preempt nor with the
- * kprobe_mutex held. This is fine(tm)
- */
- if (get_kprobe((void *)0xdeadbeef))
- printk(KERN_INFO "Kprobe smoke test: probe on 0xdeadbeef!\n");
-
- return (value / div_factor);
-}
-
-static int kp_pre_handler(struct kprobe *p, struct pt_regs *regs)
-{
- preh_val = (rand1 / div_factor);
- return 0;
-}
-
-static void kp_post_handler(struct kprobe *p, struct pt_regs *regs,
- unsigned long flags)
-{
- if (preh_val != (rand1 / div_factor)) {
- handler_errors++;
- printk(KERN_ERR "Kprobe smoke test failed: "
- "incorrect value in post_handler\n");
- }
- posth_val = preh_val + div_factor;
-}
-
-static struct kprobe kp = {
- .symbol_name = "kprobe_target",
- .pre_handler = kp_pre_handler,
- .post_handler = kp_post_handler
-};
-
-static int test_kprobe(void)
-{
- int ret;
-
- ret = register_kprobe(&kp);
- if (ret < 0) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "register_kprobe returned %d\n", ret);
- return ret;
- }
-
- ret = kprobe_target(rand1);
- unregister_kprobe(&kp);
-
- if (preh_val == 0) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "kprobe pre_handler not called\n");
- handler_errors++;
- }
-
- if (posth_val == 0) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "kprobe post_handler not called\n");
- handler_errors++;
- }
-
- return 0;
-}
-
-static u32 j_kprobe_target(u32 value)
-{
- if (value != rand1) {
- handler_errors++;
- printk(KERN_ERR "Kprobe smoke test failed: "
- "incorrect value in jprobe handler\n");
- }
-
- jph_val = rand1;
- jprobe_return();
- return 0;
-}
-
-static struct jprobe jp = {
- .entry = j_kprobe_target,
- .kp.symbol_name = "kprobe_target"
-};
-
-static int test_jprobe(void)
-{
- int ret;
-
- ret = register_jprobe(&jp);
- if (ret < 0) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "register_jprobe returned %d\n", ret);
- return ret;
- }
-
- ret = kprobe_target(rand1);
- unregister_jprobe(&jp);
- if (jph_val == 0) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "jprobe handler not called\n");
- handler_errors++;
- }
-
- return 0;
-}
-
-#ifdef CONFIG_KRETPROBES
-static u32 krph_val;
-
-static int entry_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
-{
- krph_val = (rand1 / div_factor);
- return 0;
-}
-
-static int return_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
-{
- unsigned long ret = regs_return_value(regs);
-
- if (ret != (rand1 / div_factor)) {
- handler_errors++;
- printk(KERN_ERR "Kprobe smoke test failed: "
- "incorrect value in kretprobe handler\n");
- }
- if (krph_val == 0) {
- handler_errors++;
- printk(KERN_ERR "Kprobe smoke test failed: "
- "call to kretprobe entry handler failed\n");
- }
-
- krph_val = rand1;
- return 0;
-}
-
-static struct kretprobe rp = {
- .handler = return_handler,
- .entry_handler = entry_handler,
- .kp.symbol_name = "kprobe_target"
-};
-
-static int test_kretprobe(void)
-{
- int ret;
-
- ret = register_kretprobe(&rp);
- if (ret < 0) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "register_kretprobe returned %d\n", ret);
- return ret;
- }
-
- ret = kprobe_target(rand1);
- unregister_kretprobe(&rp);
- if (krph_val != rand1) {
- printk(KERN_ERR "Kprobe smoke test failed: "
- "kretprobe handler not called\n");
- handler_errors++;
- }
-
- return 0;
-}
-#endif /* CONFIG_KRETPROBES */
-
-int init_test_probes(void)
-{
- int ret;
-
- do {
- rand1 = random32();
- } while (rand1 <= div_factor);
-
- printk(KERN_INFO "Kprobe smoke test started\n");
- num_tests++;
- ret = test_kprobe();
- if (ret < 0)
- errors++;
-
- num_tests++;
- ret = test_jprobe();
- if (ret < 0)
- errors++;
-
-#ifdef CONFIG_KRETPROBES
- num_tests++;
- ret = test_kretprobe();
- if (ret < 0)
- errors++;
-#endif /* CONFIG_KRETPROBES */
-
- if (errors)
- printk(KERN_ERR "BUG: Kprobe smoke test: %d out of "
- "%d tests failed\n", errors, num_tests);
- else if (handler_errors)
- printk(KERN_ERR "BUG: Kprobe smoke test: %d error(s) "
- "running handlers\n", handler_errors);
- else
- printk(KERN_INFO "Kprobe smoke test passed successfully\n");
-
- return 0;
-}