FADVISE_LOST_PINO_BIT  644 fs/f2fs/f2fs.h #define file_wrong_pino(inode)	is_file(inode, FADVISE_LOST_PINO_BIT)
FADVISE_LOST_PINO_BIT  646 fs/f2fs/f2fs.h #define file_lost_pino(inode)	set_file(inode, FADVISE_LOST_PINO_BIT)
FADVISE_LOST_PINO_BIT  648 fs/f2fs/f2fs.h #define file_got_pino(inode)	clear_file(inode, FADVISE_LOST_PINO_BIT)