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-rw-r--r--kernel/sched/wait_bit.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/kernel/sched/wait_bit.c b/kernel/sched/wait_bit.c
index f8159698aa4d..84cb3acd9260 100644
--- a/kernel/sched/wait_bit.c
+++ b/kernel/sched/wait_bit.c
@@ -183,7 +183,7 @@ static int wake_atomic_t_function(struct wait_queue_entry *wq_entry, unsigned mo
*/
static __sched
int __wait_on_atomic_t(struct wait_queue_head *wq_head, struct wait_bit_queue_entry *wbq_entry,
- int (*action)(atomic_t *), unsigned mode)
+ wait_atomic_t_action_f action, unsigned int mode)
{
atomic_t *val;
int ret = 0;
@@ -193,7 +193,7 @@ int __wait_on_atomic_t(struct wait_queue_head *wq_head, struct wait_bit_queue_en
val = wbq_entry->key.flags;
if (atomic_read(val) == 0)
break;
- ret = (*action)(val);
+ ret = (*action)(val, mode);
} while (!ret && atomic_read(val) != 0);
finish_wait(wq_head, &wbq_entry->wq_entry);
return ret;
@@ -210,8 +210,9 @@ int __wait_on_atomic_t(struct wait_queue_head *wq_head, struct wait_bit_queue_en
}, \
}
-__sched int out_of_line_wait_on_atomic_t(atomic_t *p, int (*action)(atomic_t *),
- unsigned mode)
+__sched int out_of_line_wait_on_atomic_t(atomic_t *p,
+ wait_atomic_t_action_f action,
+ unsigned int mode)
{
struct wait_queue_head *wq_head = atomic_t_waitqueue(p);
DEFINE_WAIT_ATOMIC_T(wq_entry, p);
@@ -220,6 +221,15 @@ __sched int out_of_line_wait_on_atomic_t(atomic_t *p, int (*action)(atomic_t *),
}
EXPORT_SYMBOL(out_of_line_wait_on_atomic_t);
+__sched int atomic_t_wait(atomic_t *counter, unsigned int mode)
+{
+ schedule();
+ if (signal_pending_state(mode, current))
+ return -EINTR;
+ return 0;
+}
+EXPORT_SYMBOL(atomic_t_wait);
+
/**
* wake_up_atomic_t - Wake up a waiter on a atomic_t
* @p: The atomic_t being waited on, a kernel virtual address