提交 cc63b1e1 编写于 作者: J Jan Beulich 提交者: Linus Torvalds

[PATCH] console blanking oops fix

When significant delays happen during boot (e.g.  with a kernel debugger,
but the problem has also seen in other cases) the timeout for blanking the
console may trigger, but the work scheduler may not have been initialized,
yet.  schedule_work() will oops over the null keventd_wq.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 43fde784
......@@ -2867,6 +2867,10 @@ void unblank_screen(void)
*/
static void blank_screen_t(unsigned long dummy)
{
if (unlikely(!keventd_up())) {
mod_timer(&console_timer, jiffies + blankinterval);
return;
}
blank_timer_expired = 1;
schedule_work(&console_work);
}
......
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