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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-01-30 15:49:29 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-02-23 09:01:12 -0800
commit36970bb91d89618d3495babf44b934e9c9db6bbc (patch)
treecee37f3089c868338f626124124fe2f90c26cdbd /kernel/rcu/rcutorture.c
parent4622b487ecf0094401ac10e504606e5cbdea5a6e (diff)
rcutorture: Privatize fullstop
This commit introduces the torture_must_stop() function in order to keep use of the fullstop variable local to kernel/torture.c. There is also a torture_must_stop_irq() counterpart for use from RCU callbacks, timeout handlers, and the like. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcu/rcutorture.c')
-rw-r--r--kernel/rcu/rcutorture.c38
1 files changed, 15 insertions, 23 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 2560e9313887..9357c88cc8cc 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -304,7 +304,7 @@ rcu_torture_cb(struct rcu_head *p)
int i;
struct rcu_torture *rp = container_of(p, struct rcu_torture, rtort_rcu);
- if (fullstop != FULLSTOP_DONTSTOP) {
+ if (torture_must_stop_irq()) {
/* Test is ending, just drop callbacks on the floor. */
/* The next initialization will pick up the pieces. */
return;
@@ -572,8 +572,7 @@ static int rcu_torture_boost(void *arg)
while (ULONG_CMP_LT(jiffies, oldstarttime)) {
schedule_timeout_interruptible(oldstarttime - jiffies);
rcu_stutter_wait("rcu_torture_boost");
- if (kthread_should_stop() ||
- fullstop != FULLSTOP_DONTSTOP)
+ if (torture_must_stop())
goto checkwait;
}
@@ -595,8 +594,7 @@ static int rcu_torture_boost(void *arg)
}
cond_resched();
rcu_stutter_wait("rcu_torture_boost");
- if (kthread_should_stop() ||
- fullstop != FULLSTOP_DONTSTOP)
+ if (torture_must_stop())
goto checkwait;
}
@@ -621,7 +619,7 @@ static int rcu_torture_boost(void *arg)
/* Go do the stutter. */
checkwait: rcu_stutter_wait("rcu_torture_boost");
- } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP);
+ } while (!torture_must_stop());
/* Clean up and exit. */
VERBOSE_TOROUT_STRING("rcu_torture_boost task stopping");
@@ -659,7 +657,7 @@ rcu_torture_fqs(void *arg)
fqs_burst_remaining -= fqs_holdoff;
}
rcu_stutter_wait("rcu_torture_fqs");
- } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP);
+ } while (!torture_must_stop());
VERBOSE_TOROUT_STRING("rcu_torture_fqs task stopping");
torture_shutdown_absorb("rcu_torture_fqs");
while (!kthread_should_stop())
@@ -731,7 +729,7 @@ rcu_torture_writer(void *arg)
}
rcutorture_record_progress(++rcu_torture_current_version);
rcu_stutter_wait("rcu_torture_writer");
- } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP);
+ } while (!torture_must_stop());
VERBOSE_TOROUT_STRING("rcu_torture_writer task stopping");
torture_shutdown_absorb("rcu_torture_writer");
while (!kthread_should_stop())
@@ -768,7 +766,7 @@ rcu_torture_fakewriter(void *arg)
cur_ops->exp_sync();
}
rcu_stutter_wait("rcu_torture_fakewriter");
- } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP);
+ } while (!torture_must_stop());
VERBOSE_TOROUT_STRING("rcu_torture_fakewriter task stopping");
torture_shutdown_absorb("rcu_torture_fakewriter");
@@ -913,7 +911,7 @@ rcu_torture_reader(void *arg)
cur_ops->readunlock(idx);
schedule();
rcu_stutter_wait("rcu_torture_reader");
- } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP);
+ } while (!torture_must_stop());
VERBOSE_TOROUT_STRING("rcu_torture_reader task stopping");
torture_shutdown_absorb("rcu_torture_reader");
if (irqreader && cur_ops->irq_capable)
@@ -1022,9 +1020,6 @@ rcu_torture_stats_print(void)
/*
* 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)
@@ -1034,7 +1029,7 @@ rcu_torture_stats(void *arg)
schedule_timeout_interruptible(stat_interval * HZ);
rcu_torture_stats_print();
torture_shutdown_absorb("rcu_torture_stats");
- } while (!kthread_should_stop());
+ } while (!torture_must_stop());
VERBOSE_TOROUT_STRING("rcu_torture_stats task stopping");
return 0;
}
@@ -1241,16 +1236,15 @@ static int rcu_torture_barrier_cbs(void *arg)
wait_event(barrier_cbs_wq[myid],
(newphase =
ACCESS_ONCE(barrier_phase)) != lastphase ||
- kthread_should_stop() ||
- fullstop != FULLSTOP_DONTSTOP);
+ torture_must_stop());
lastphase = newphase;
smp_mb(); /* ensure barrier_phase load before ->call(). */
- if (kthread_should_stop() || fullstop != FULLSTOP_DONTSTOP)
+ if (torture_must_stop())
break;
cur_ops->call(&rcu, rcu_torture_barrier_cbf);
if (atomic_dec_and_test(&barrier_cbs_count))
wake_up(&barrier_wq);
- } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP);
+ } while (!torture_must_stop());
VERBOSE_TOROUT_STRING("rcu_torture_barrier_cbs task stopping");
torture_shutdown_absorb("rcu_torture_barrier_cbs");
while (!kthread_should_stop())
@@ -1275,9 +1269,8 @@ static int rcu_torture_barrier(void *arg)
wake_up(&barrier_cbs_wq[i]);
wait_event(barrier_wq,
atomic_read(&barrier_cbs_count) == 0 ||
- kthread_should_stop() ||
- fullstop != FULLSTOP_DONTSTOP);
- if (kthread_should_stop() || fullstop != FULLSTOP_DONTSTOP)
+ torture_must_stop());
+ if (torture_must_stop())
break;
n_barrier_attempts++;
cur_ops->cb_barrier(); /* Implies smp_mb() for wait_event(). */
@@ -1287,7 +1280,7 @@ static int rcu_torture_barrier(void *arg)
}
n_barrier_successes++;
schedule_timeout_interruptible(HZ / 10);
- } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP);
+ } while (!torture_must_stop());
VERBOSE_TOROUT_STRING("rcu_torture_barrier task stopping");
torture_shutdown_absorb("rcu_torture_barrier");
while (!kthread_should_stop())
@@ -1585,7 +1578,6 @@ rcu_torture_init(void)
else
nrealreaders = 2 * num_online_cpus();
rcu_torture_print_module_parms(cur_ops, "Start of test");
- fullstop = FULLSTOP_DONTSTOP;
/* Set up the freelist. */