__X32_SYSCALL_BIT 13 arch/x86/include/uapi/asm/unistd.h #define __X32_SYSCALL_BIT 0x40000000 __X32_SYSCALL_BIT 6 tools/arch/x86/include/uapi/asm/unistd.h #define __X32_SYSCALL_BIT 0x40000000