Interrupt controllers' hooks are executed in the atomic context, so
they are not permitted to sleep (with RT kernels non-raw spinlocks are
sleepable). So, socrates_fpga_pic_lock has to be a real (non-sleepable)
spinlock.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>