WAIT_EVENT_INTERRUPT(9) Driver Basics WAIT_EVENT_INTERRUPT(9)NAMEwait_event_interruptible_lock_irq_cmd - sleep until a condition gets
true. The condition is checked under the lock. This is expected to be
called with the lock taken.
SYNOPSIS
wait_event_interruptible_lock_irq_cmd(wq, condition, lock, cmd);
ARGUMENTS
wq
the waitqueue to wait on
condition
a C expression for the event to wait for
lock
a locked spinlock_t, which will be released before cmd and schedule
and reacquired afterwards.
cmd
a command which is invoked outside the critical section before
sleep
DESCRIPTION
The process is put to sleep (TASK_INTERRUPTIBLE) until the condition
evaluates to true or a signal is received. The condition is checked
each time the waitqueue wq is woken up.
wake_up has to be called after changing any variable that could change
the result of the wait condition.
This is supposed to be called while holding the lock. The lock is
dropped before invoking the cmd and going to sleep and is reacquired
afterwards.
The macro will return -ERESTARTSYS if it was interrupted by a signal
and 0 if condition evaluated to true.
COPYRIGHTKernel Hackers Manual 3.11 November 2013 WAIT_EVENT_INTERRUPT(9)
