fadvise           647 fs/overlayfs/file.c 	.fadvise	= ovl_fadvise,
fadvise          1266 fs/xfs/xfs_file.c 	.fadvise	= xfs_file_fadvise,
fadvise          1861 include/linux/fs.h 	int (*fadvise)(struct file *, loff_t, loff_t, int);
fadvise           184 mm/fadvise.c   	if (file->f_op->fadvise)
fadvise           185 mm/fadvise.c   		return file->f_op->fadvise(file, offset, len, advice);