F_LINUX_SPECIFIC_BASE    6 include/linux/fcntl.h #define F_SETLEASE	(F_LINUX_SPECIFIC_BASE + 0)
F_LINUX_SPECIFIC_BASE    7 include/linux/fcntl.h #define F_GETLEASE	(F_LINUX_SPECIFIC_BASE + 1)
F_LINUX_SPECIFIC_BASE   13 include/linux/fcntl.h #define F_CANCELLK	(F_LINUX_SPECIFIC_BASE + 5)
F_LINUX_SPECIFIC_BASE   16 include/linux/fcntl.h #define F_DUPFD_CLOEXEC	(F_LINUX_SPECIFIC_BASE + 6)
F_LINUX_SPECIFIC_BASE   22 include/linux/fcntl.h #define F_NOTIFY	(F_LINUX_SPECIFIC_BASE+2)