{
int retval = 0;
- if (can_use_console(cpu))
- retval = !try_acquire_console_sem();
+ if (!try_acquire_console_sem()) {
+ retval = 1;
+
+ /*
+ * If we can't use the console, we need to release
+ * the console semaphore by hand to avoid flushing
+ * the buffer. We need to hold the console semaphore
+ * in order to do this test safely.
+ */
+ if (!can_use_console(cpu)) {
+ console_locked = 0;
+ up(&console_sem);
+ retval = 0;
+ }
+ }
printk_cpu = UINT_MAX;
spin_unlock(&logbuf_lock);
return retval;
*/
void tty_write_message(struct tty_struct *tty, char *msg)
{
- if (tty && tty->driver->write)
- tty->driver->write(tty, msg, strlen(msg));
+ if (tty && tty->ops->write)
+ tty->ops->write(tty, msg, strlen(msg));
return;
}
*/
int __printk_ratelimit(int ratelimit_jiffies, int ratelimit_burst)
{
- static DEFINE_SPINLOCK(ratelimit_lock);
- static unsigned toks = 10 * 5 * HZ;
- static unsigned long last_msg;
- static int missed;
- unsigned long flags;
- unsigned long now = jiffies;
-
- spin_lock_irqsave(&ratelimit_lock, flags);
- toks += now - last_msg;
- last_msg = now;
- if (toks > (ratelimit_burst * ratelimit_jiffies))
- toks = ratelimit_burst * ratelimit_jiffies;
- if (toks >= ratelimit_jiffies) {
- int lost = missed;
-
- missed = 0;
- toks -= ratelimit_jiffies;
- spin_unlock_irqrestore(&ratelimit_lock, flags);
- if (lost)
- printk(KERN_WARNING "printk: %d messages suppressed.\n", lost);
- return 1;
- }
- missed++;
- spin_unlock_irqrestore(&ratelimit_lock, flags);
- return 0;
+ return __ratelimit(ratelimit_jiffies, ratelimit_burst);
}
EXPORT_SYMBOL(__printk_ratelimit);