NV_PFIFO_INTR_SEMAPHORE  451 drivers/gpu/drm/nouveau/nouveau_reg.h #    define NV_PFIFO_INTR_SEMAPHORE                           (1<<20)
NV_PFIFO_INTR_SEMAPHORE   15 drivers/gpu/drm/nouveau/nvkm/engine/fifo/regsnv04.h #    define NV_PFIFO_INTR_SEMAPHORE                           (1<<20)