Support function for PCI. We don't use any advance mapping mechanism
that's why implementation is simple.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Convert locks which cannot be sleeping locks in preempt-rt to
raw_spinlocks.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@elte.hu>