Function sys_epoll_wait 

pub fn sys_epoll_wait(
    _abi: &mut LinuxRiscv64Abi,
    trapframe: &mut Trapframe,
) -> usize

Linux epoll_wait implementation (stub)

Waits for events on an epoll file descriptor. This is a stub implementation that immediately returns 0 (no events ready) to prevent blocking.

Arguments:

• abi: LinuxRiscv64Abi context
• trapframe: Trapframe containing syscall arguments
  • arg0: epfd (epoll file descriptor)
  • arg1: events (pointer to epoll_event array)
  • arg2: maxevents (maximum number of events)
  • arg3: timeout (timeout in milliseconds)

Returns:

• number of ready events
• usize::MAX (Linux -1) on error