On Tue, 25 Jun 2019, Thomas Gleixner wrote: > * Returns: false if a threaded handler is active. > * > * This function may be called - with care - from IRQ context. > + * > + * It does not check whether there is an interrupt on flight at the > + * hardware level, but not serviced yet, as this might deadlock.
+ when invoked from an interrupt disabled region.
