diff options
| author | Jiri Slaby <jirislaby@gmail.com> | 2007-07-15 23:40:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 09:05:44 -0700 |
| commit | e0955e14f72dd1f561dc8b7c4434a253914ddfd4 (patch) | |
| tree | 0a5cc911207d0bf710dbc4d3896e808e631ff1ec /drivers | |
| parent | 6804396f1b66c504bac1267d71a857f7a1d1e9dd (diff) | |
| download | linux-e0955e14f72dd1f561dc8b7c4434a253914ddfd4.tar.gz | |
Char: genrtc, use wait_event_interruptible
genrtc, use wait_event_interruptible Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -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 9e1fc02967ff..69f0a2993af0 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; } |