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rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()

Sfoglia il codice sorgente 
This commit moves from the old ACCESS_ONCE() API to the new READ_ONCE()
and WRITE_ONCE() APIs.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
[ paulmck:  Updated to include kernel/torture.c as suggested by Jason Low. ]
This commit is contained in:
Paul E. McKenney
2015-03-03 14:57:58 -08:00
parent 030bbdbf4c
commit 7d0ae8086b
10 ha cambiato i file con 193 aggiunte e 192 eliminazioni
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26
kernel/torture.c
Vedi File

@@ -409,7 +409,7 @@ static void (*torture_shutdown_hook)(void);
*/
void torture_shutdown_absorb(const char *title)
{
while (ACCESS_ONCE(fullstop) == FULLSTOP_SHUTDOWN) {
while (READ_ONCE(fullstop) == FULLSTOP_SHUTDOWN) {
pr_notice("torture thread %s parking due to system shutdown\n",
title);
schedule_timeout_uninterruptible(MAX_SCHEDULE_TIMEOUT);
@@ -480,9 +480,9 @@ static int torture_shutdown_notify(struct notifier_block *unused1,
unsigned long unused2, void *unused3)
{
mutex_lock(&fullstop_mutex);
if (ACCESS_ONCE(fullstop) == FULLSTOP_DONTSTOP) {
if (READ_ONCE(fullstop) == FULLSTOP_DONTSTOP) {
VERBOSE_TOROUT_STRING("Unscheduled system shutdown detected");
ACCESS_ONCE(fullstop) = FULLSTOP_SHUTDOWN;
WRITE_ONCE(fullstop, FULLSTOP_SHUTDOWN);
} else {
pr_warn("Concurrent rmmod and shutdown illegal!\n");
}
@@ -523,13 +523,13 @@ static int stutter;
*/
void stutter_wait(const char *title)
{
while (ACCESS_ONCE(stutter_pause_test) ||
(torture_runnable && !ACCESS_ONCE(*torture_runnable))) {
while (READ_ONCE(stutter_pause_test) ||
(torture_runnable && !READ_ONCE(*torture_runnable))) {
if (stutter_pause_test)
if (ACCESS_ONCE(stutter_pause_test) == 1)
if (READ_ONCE(stutter_pause_test) == 1)
schedule_timeout_interruptible(1);
else
while (ACCESS_ONCE(stutter_pause_test))
while (READ_ONCE(stutter_pause_test))
cond_resched();
else
schedule_timeout_interruptible(round_jiffies_relative(HZ));
@@ -549,14 +549,14 @@ static int torture_stutter(void *arg)
if (!torture_must_stop()) {
if (stutter > 1) {
schedule_timeout_interruptible(stutter - 1);
ACCESS_ONCE(stutter_pause_test) = 2;
WRITE_ONCE(stutter_pause_test, 2);
}
schedule_timeout_interruptible(1);
ACCESS_ONCE(stutter_pause_test) = 1;
WRITE_ONCE(stutter_pause_test, 1);
}
if (!torture_must_stop())
schedule_timeout_interruptible(stutter);
ACCESS_ONCE(stutter_pause_test) = 0;
WRITE_ONCE(stutter_pause_test, 0);
torture_shutdown_absorb("torture_stutter");
} while (!torture_must_stop());
torture_kthread_stopping("torture_stutter");
@@ -642,13 +642,13 @@ EXPORT_SYMBOL_GPL(torture_init_end);
bool torture_cleanup_begin(void)
{
mutex_lock(&fullstop_mutex);
if (ACCESS_ONCE(fullstop) == FULLSTOP_SHUTDOWN) {
if (READ_ONCE(fullstop) == FULLSTOP_SHUTDOWN) {
pr_warn("Concurrent rmmod and shutdown illegal!\n");
mutex_unlock(&fullstop_mutex);
schedule_timeout_uninterruptible(10);
return true;
}
ACCESS_ONCE(fullstop) = FULLSTOP_RMMOD;
WRITE_ONCE(fullstop, FULLSTOP_RMMOD);
mutex_unlock(&fullstop_mutex);
torture_shutdown_cleanup();
torture_shuffle_cleanup();
@@ -681,7 +681,7 @@ EXPORT_SYMBOL_GPL(torture_must_stop);
*/
bool torture_must_stop_irq(void)
{
return ACCESS_ONCE(fullstop) != FULLSTOP_DONTSTOP;
return READ_ONCE(fullstop) != FULLSTOP_DONTSTOP;
}
EXPORT_SYMBOL_GPL(torture_must_stop_irq);