LAST_PKMAP_MASK    42 arch/xtensa/include/asm/highmem.h 		(last_pkmap_nr_arr[color] + DCACHE_N_COLORS) & LAST_PKMAP_MASK;
LAST_PKMAP_MASK    71 mm/highmem.c   	last_pkmap_nr = (last_pkmap_nr + 1) & LAST_PKMAP_MASK;