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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-10-16 11:05:03 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-12-11 09:18:22 -0800
commitcc1321c96f855525fbd847fec130f000daa1bb1f (patch)
treecdfa9485981454a8de6d7b506970008051184386
parentcf8d8b00518d9228d603fcd17de47c31deb70b8f (diff)
torture: Reduce #ifdefs for preempt_schedule()
This commit adds a torture_preempt_schedule() that is nothingness in !PREEMPT builds and is preempt_schedule() otherwise. Then torture_preempt_schedule() is used to eliminate several ugly #ifdefs, both in rcutorture and in locktorture. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-rw-r--r--include/linux/torture.h6
-rw-r--r--kernel/locking/locktorture.c24
-rw-r--r--kernel/rcu/rcutorture.c4
3 files changed, 13 insertions, 21 deletions
diff --git a/include/linux/torture.h b/include/linux/torture.h
index a45702eb3e7b..907d266aaddc 100644
--- a/include/linux/torture.h
+++ b/include/linux/torture.h
@@ -96,4 +96,10 @@ void _torture_stop_kthread(char *m, struct task_struct **tp);
#define torture_stop_kthread(n, tp) \
_torture_stop_kthread("Stopping " #n " task", &(tp))
+#ifdef CONFIG_PREEMPT
+#define torture_preempt_schedule() preempt_schedule()
+#else
+#define torture_preempt_schedule()
+#endif
+
#endif /* __LINUX_TORTURE_H */
diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c
index f24582d4dad3..617cea2520b3 100644
--- a/kernel/locking/locktorture.c
+++ b/kernel/locking/locktorture.c
@@ -130,10 +130,8 @@ static void torture_lock_busted_write_delay(struct torture_random_state *trsp)
if (!(torture_random(trsp) %
(cxt.nrealwriters_stress * 2000 * longdelay_ms)))
mdelay(longdelay_ms);
-#ifdef CONFIG_PREEMPT
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
- preempt_schedule(); /* Allow test to be preempted. */
-#endif
+ torture_preempt_schedule(); /* Allow test to be preempted. */
}
static void torture_lock_busted_write_unlock(void)
@@ -179,10 +177,8 @@ static void torture_spin_lock_write_delay(struct torture_random_state *trsp)
if (!(torture_random(trsp) %
(cxt.nrealwriters_stress * 2 * shortdelay_us)))
udelay(shortdelay_us);
-#ifdef CONFIG_PREEMPT
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
- preempt_schedule(); /* Allow test to be preempted. */
-#endif
+ torture_preempt_schedule(); /* Allow test to be preempted. */
}
static void torture_spin_lock_write_unlock(void) __releases(torture_spinlock)
@@ -352,10 +348,8 @@ static void torture_mutex_delay(struct torture_random_state *trsp)
mdelay(longdelay_ms * 5);
else
mdelay(longdelay_ms / 5);
-#ifdef CONFIG_PREEMPT
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
- preempt_schedule(); /* Allow test to be preempted. */
-#endif
+ torture_preempt_schedule(); /* Allow test to be preempted. */
}
static void torture_mutex_unlock(void) __releases(torture_mutex)
@@ -507,10 +501,8 @@ static void torture_rtmutex_delay(struct torture_random_state *trsp)
if (!(torture_random(trsp) %
(cxt.nrealwriters_stress * 2 * shortdelay_us)))
udelay(shortdelay_us);
-#ifdef CONFIG_PREEMPT
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
- preempt_schedule(); /* Allow test to be preempted. */
-#endif
+ torture_preempt_schedule(); /* Allow test to be preempted. */
}
static void torture_rtmutex_unlock(void) __releases(torture_rtmutex)
@@ -547,10 +539,8 @@ static void torture_rwsem_write_delay(struct torture_random_state *trsp)
mdelay(longdelay_ms * 10);
else
mdelay(longdelay_ms / 10);
-#ifdef CONFIG_PREEMPT
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
- preempt_schedule(); /* Allow test to be preempted. */
-#endif
+ torture_preempt_schedule(); /* Allow test to be preempted. */
}
static void torture_rwsem_up_write(void) __releases(torture_rwsem)
@@ -574,10 +564,8 @@ static void torture_rwsem_read_delay(struct torture_random_state *trsp)
mdelay(longdelay_ms * 2);
else
mdelay(longdelay_ms / 2);
-#ifdef CONFIG_PREEMPT
if (!(torture_random(trsp) % (cxt.nrealreaders_stress * 20000)))
- preempt_schedule(); /* Allow test to be preempted. */
-#endif
+ torture_preempt_schedule(); /* Allow test to be preempted. */
}
static void torture_rwsem_up_read(void) __releases(torture_rwsem)
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 74f6b0146b98..e7d3cce84214 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -315,11 +315,9 @@ static void rcu_read_delay(struct torture_random_state *rrsp)
}
if (!(torture_random(rrsp) % (nrealreaders * 2 * shortdelay_us)))
udelay(shortdelay_us);
-#ifdef CONFIG_PREEMPT
if (!preempt_count() &&
!(torture_random(rrsp) % (nrealreaders * 20000)))
- preempt_schedule(); /* No QS if preempt_disable() in effect */
-#endif
+ torture_preempt_schedule(); /* QS only if preemptible. */
}
static void rcu_torture_read_unlock(int idx) __releases(RCU)