37 type Result<T> = core::result::Result<T, SystemError>;  typedef
41     fn set_bpf_prog(&self, _bpf_prog: Arc<File>) -> Result<()> {  in set_bpf_prog()
45     fn enable(&self) -> Result<()> {  in enable()
49     fn disable(&self) -> Result<()> {  in disable()
72     ) -> core::result::Result<(), SystemError> {  in remove_epoll()
91     fn epoll_callback(&self) -> Result<()> {  in epoll_callback()
107     fn mmap(&self, start: usize, len: usize, offset: usize) -> Result<()> {  in mmap()
110     fn open(&self, _data: SpinLockGuard<FilePrivateData>, _mode: &FileMode) -> Result<()> {  in open()
113     fn close(&self, _data: SpinLockGuard<FilePrivateData>) -> Result<()> {  in close()
149     fn resize(&self, _len: usize) -> Result<()> {  in resize()
313 pub fn perf_event_output(_ctx: *mut c_void, fd: usize, _flags: u32, data: &[u8]) -> Result<()> {  in perf_event_output()