diff options
Diffstat (limited to 'drivers/char/genrtc.c')
| -rw-r--r-- | drivers/char/genrtc.c | 22 |
1 files changed, 5 insertions, 17 deletions
diff --git a/drivers/char/genrtc.c b/drivers/char/genrtc.c index 9e1fc02967f..69f0a2993af 100644 --- a/drivers/char/genrtc.c +++ b/drivers/char/genrtc.c @@ -173,7 +173,6 @@ static void gen_rtc_interrupt(unsigned long arg) static ssize_t gen_rtc_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { - DECLARE_WAITQUEUE(wait, current); unsigned long data; ssize_t retval; @@ -183,18 +182,10 @@ static ssize_t gen_rtc_read(struct file *file, char __user *buf, if (file->f_flags & O_NONBLOCK && !gen_rtc_irq_data) return -EAGAIN; - add_wait_queue(&gen_rtc_wait, &wait); - retval = -ERESTARTSYS; - - while (1) { - set_current_state(TASK_INTERRUPTIBLE); - data = xchg(&gen_rtc_irq_data, 0); - if (data) - break; - if (signal_pending(current)) - goto out; - schedule(); - } + retval = wait_event_interruptible(gen_rtc_wait, + (data = xchg(&gen_rtc_irq_data, 0))); + if (retval) + goto out; /* first test allows optimizer to nuke this case for 32-bit machines */ if (sizeof (int) != sizeof (long) && count == sizeof (unsigned int)) { @@ -206,10 +197,7 @@ static ssize_t gen_rtc_read(struct file *file, char __user *buf, retval = put_user(data, (unsigned long __user *)buf) ?: sizeof(unsigned long); } - out: - __set_current_state(TASK_RUNNING); - remove_wait_queue(&gen_rtc_wait, &wait); - +out: return retval; } |