__NR_umount         7 arch/alpha/include/uapi/asm/unistd.h #define __NR_umount	__NR_umount2
__NR_umount        18 arch/ia64/include/uapi/asm/unistd.h #define __NR_umount __NR_umount2
__NR_umount        40 arch/sh/include/uapi/asm/unistd_64.h #define __NR_umount		 22