MAX_PERIOD         36 arch/m68k/amiga/amisound.c #define MAX_PERIOD	(65535)
MAX_PERIOD         72 arch/sparc/kernel/perf_event.c #define MAX_PERIOD			((1UL << 32) - 1)
MAX_PERIOD        218 block/blk-iocost.c 	MAX_PERIOD		= USEC_PER_SEC,