PKMAP_SIZE         15 arch/arc/include/asm/highmem.h #define FIXMAP_BASE		(PAGE_OFFSET - FIXMAP_SIZE - PKMAP_SIZE)
PKMAP_SIZE         23 arch/arc/include/asm/highmem.h #define LAST_PKMAP		(PKMAP_SIZE >> PAGE_SHIFT)
PKMAP_SIZE        134 arch/arc/mm/highmem.c 	BUILD_BUG_ON(PAGE_OFFSET < (VMALLOC_END + FIXMAP_SIZE + PKMAP_SIZE));