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rcutorture: Privatize fullstop

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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>
This commit is contained in:
Paul E. McKenney
2014-01-30 15:49:29 -08:00
parent 4622b487ec
commit 36970bb91d
3 changed files with 42 additions and 31 deletions
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27
kernel/torture.c
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@@ -52,8 +52,11 @@ MODULE_AUTHOR("Paul E. McKenney <paulmck@us.ibm.com>");
static char *torture_type;
static bool verbose;
int fullstop = FULLSTOP_RMMOD;
EXPORT_SYMBOL_GPL(fullstop);
/* Mediate rmmod and system shutdown. Concurrent rmmod & shutdown illegal! */
#define FULLSTOP_DONTSTOP 0 /* Normal operation. */
#define FULLSTOP_SHUTDOWN 1 /* System shutdown with torture running. */
#define FULLSTOP_RMMOD 2 /* Normal rmmod of torture. */
static int fullstop = FULLSTOP_RMMOD;
static DEFINE_MUTEX(fullstop_mutex);
#ifdef CONFIG_HOTPLUG_CPU
@@ -458,6 +461,7 @@ void __init torture_init_begin(char *ttype, bool v)
mutex_lock(&fullstop_mutex);
torture_type = ttype;
verbose = v;
fullstop = FULLSTOP_DONTSTOP;
}
EXPORT_SYMBOL_GPL(torture_init_begin);
@@ -498,3 +502,22 @@ bool torture_cleanup(void)
return false;
}
EXPORT_SYMBOL_GPL(torture_cleanup);
/*
* Is it time for the current torture test to stop?
*/
bool torture_must_stop(void)
{
return torture_must_stop_irq() || kthread_should_stop();
}
EXPORT_SYMBOL_GPL(torture_must_stop);
/*
* Is it time for the current torture test to stop? This is the irq-safe
* version, hence no check for kthread_should_stop().
*/
bool torture_must_stop_irq(void)
{
return fullstop != FULLSTOP_DONTSTOP;
}
EXPORT_SYMBOL_GPL(torture_must_stop_irq);