VMALLOC_START      33 arch/x86/include/asm/pgtable_32_types.h #define VMALLOC_START	((unsigned long)high_memory + VMALLOC_OFFSET)
VMALLOC_START      58 arch/x86/include/asm/pgtable_64_types.h #define VMALLOC_START    _AC(0xffffc90000000000, UL)