__NR_umount2       56 arch/x86/include/generated/uapi/asm/unistd_32.h #define __NR_umount2 52
__NR_umount2      170 arch/x86/include/generated/uapi/asm/unistd_64.h #define __NR_umount2 166
__NR_umount2      152 arch/x86/include/generated/uapi/asm/unistd_x32.h #define __NR_umount2 (__X32_SYSCALL_BIT + 166)