diff --git a/services/libs/jinux-std/src/fs/epoll/mod.rs b/services/libs/jinux-std/src/fs/epoll/mod.rs
index e2d4951b6..c994af3e2 100644
--- a/services/libs/jinux-std/src/fs/epoll/mod.rs
+++ b/services/libs/jinux-std/src/fs/epoll/mod.rs
@@ -45,28 +45,3 @@ impl EpollEvent {
         Self { events, user_data }
     }
 }
-
-impl From<&c_epoll_event> for EpollEvent {
-    fn from(c_event: &c_epoll_event) -> Self {
-        Self {
-            events: IoEvents::from_bits_truncate(c_event.events as u32),
-            user_data: c_event.data,
-        }
-    }
-}
-
-impl From<&EpollEvent> for c_epoll_event {
-    fn from(ep_event: &EpollEvent) -> Self {
-        Self {
-            events: ep_event.events.bits() as u32,
-            data: ep_event.user_data,
-        }
-    }
-}
-
-#[derive(Debug, Clone, Copy, Pod)]
-#[repr(C)]
-pub struct c_epoll_event {
-    pub events: u32,
-    pub data: u64,
-}
diff --git a/services/libs/jinux-std/src/fs/utils/fcntl.rs b/services/libs/jinux-std/src/fs/utils/fcntl.rs
deleted file mode 100644
index b7e80f3a6..000000000
--- a/services/libs/jinux-std/src/fs/utils/fcntl.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-use crate::prelude::*;
-
-#[repr(i32)]
-#[derive(Debug, Clone, Copy, TryFromInt)]
-#[allow(non_camel_case_types)]
-pub enum FcntlCmd {
-    F_DUPFD = 0,
-    F_GETFD = 1,
-    F_SETFD = 2,
-    F_DUPFD_CLOEXEC = 1030,
-}
diff --git a/services/libs/jinux-std/src/fs/utils/mod.rs b/services/libs/jinux-std/src/fs/utils/mod.rs
index dce7915d4..ebf9d094a 100644
--- a/services/libs/jinux-std/src/fs/utils/mod.rs
+++ b/services/libs/jinux-std/src/fs/utils/mod.rs
@@ -6,7 +6,6 @@ pub use creation_flags::CreationFlags;
 pub use dentry_cache::Dentry;
 pub use dirent_visitor::DirentVisitor;
 pub use direntry_vec::DirEntryVecExt;
-pub use fcntl::FcntlCmd;
 pub use file_creation_mask::FileCreationMask;
 pub use fs::{FileSystem, FsFlags, SuperBlock};
 pub use inode::{Inode, InodeMode, InodeType, Metadata};
@@ -23,7 +22,6 @@ mod creation_flags;
 mod dentry_cache;
 mod dirent_visitor;
 mod direntry_vec;
-mod fcntl;
 mod file_creation_mask;
 mod fs;
 mod inode;
diff --git a/services/libs/jinux-std/src/syscall/epoll.rs b/services/libs/jinux-std/src/syscall/epoll.rs
index b164a6edb..50fdbdbdc 100644
--- a/services/libs/jinux-std/src/syscall/epoll.rs
+++ b/services/libs/jinux-std/src/syscall/epoll.rs
@@ -1,8 +1,8 @@
 use core::time::Duration;
 
-use crate::fs::epoll::{c_epoll_event, EpollCtl, EpollEvent, EpollFile, EpollFlags};
+use crate::fs::epoll::{EpollCtl, EpollEvent, EpollFile, EpollFlags};
 use crate::fs::file_table::FileDescripter;
-use crate::fs::utils::CreationFlags;
+use crate::fs::utils::{CreationFlags, IoEvents};
 use crate::log_syscall_entry;
 use crate::prelude::*;
 use crate::util::{read_val_from_user, write_val_to_user};
@@ -131,3 +131,28 @@ pub fn sys_epoll_wait(
 
     Ok(SyscallReturn::Return(epoll_events.len() as _))
 }
+
+#[derive(Debug, Clone, Copy, Pod)]
+#[repr(C)]
+struct c_epoll_event {
+    events: u32,
+    data: u64,
+}
+
+impl From<&EpollEvent> for c_epoll_event {
+    fn from(ep_event: &EpollEvent) -> Self {
+        Self {
+            events: ep_event.events.bits() as u32,
+            data: ep_event.user_data,
+        }
+    }
+}
+
+impl From<&c_epoll_event> for EpollEvent {
+    fn from(c_event: &c_epoll_event) -> Self {
+        Self::new(
+            IoEvents::from_bits_truncate(c_event.events as u32),
+            c_event.data,
+        )
+    }
+}
diff --git a/services/libs/jinux-std/src/syscall/fcntl.rs b/services/libs/jinux-std/src/syscall/fcntl.rs
index e6e539647..f1808c907 100644
--- a/services/libs/jinux-std/src/syscall/fcntl.rs
+++ b/services/libs/jinux-std/src/syscall/fcntl.rs
@@ -1,5 +1,4 @@
 use super::{SyscallReturn, SYS_FCNTL};
-use crate::fs::utils::FcntlCmd;
 use crate::log_syscall_entry;
 use crate::{fs::file_table::FileDescripter, prelude::*};
 
@@ -25,3 +24,13 @@ pub fn sys_fcntl(fd: FileDescripter, cmd: i32, arg: u64) -> Result<SyscallReturn
         _ => todo!(),
     }
 }
+
+#[repr(i32)]
+#[derive(Debug, Clone, Copy, TryFromInt)]
+#[allow(non_camel_case_types)]
+enum FcntlCmd {
+    F_DUPFD = 0,
+    F_GETFD = 1,
+    F_SETFD = 2,
+    F_DUPFD_CLOEXEC = 1030,
+}
diff --git a/services/libs/jinux-std/src/syscall/poll.rs b/services/libs/jinux-std/src/syscall/poll.rs
index 13f564a73..730699e56 100644
--- a/services/libs/jinux-std/src/syscall/poll.rs
+++ b/services/libs/jinux-std/src/syscall/poll.rs
@@ -99,14 +99,14 @@ fn do_poll(poll_fds: &[PollFd], timeout: Option<Duration>) -> Result<usize> {
 // https://github.com/torvalds/linux/blob/master/include/uapi/asm-generic/poll.h
 #[derive(Debug, Clone, Copy, Pod)]
 #[repr(C)]
-pub struct c_pollfd {
+struct c_pollfd {
     fd: i32,
     events: i16,
     revents: i16,
 }
 
 #[derive(Debug, Clone)]
-pub struct PollFd {
+struct PollFd {
     fd: Option<FileDescripter>,
     events: IoEvents,
     revents: Cell<IoEvents>,