ffs_epfile_io    1210 drivers/usb/gadget/function/f_fs.c 	res = ffs_epfile_io(kiocb->ki_filp, p);
ffs_epfile_io    1256 drivers/usb/gadget/function/f_fs.c 	res = ffs_epfile_io(kiocb->ki_filp, p);