IPL                52 arch/i386/include/intr.h #define IMASK(level) imask[IPL(level)]
IPL                53 arch/i386/include/intr.h #define IUNMASK(level) iunmask[IPL(level)]
IPL                41 arch/i386/include/mutex.h #define MUTEX_INITIALIZER(IPL) { 0, (IPL), 0, NULL }
IPL               281 arch/i386/isa/isa_machdep.c 			levels |= 1 << IPL(q->ih_level);