diff --git a/src/syscall/driver.rs b/src/syscall/driver.rs
index 83e576eb9f..ae0c2a4cb6 100644
--- a/src/syscall/driver.rs
+++ b/src/syscall/driver.rs
@@ -1,3 +1,5 @@
+use alloc::sync::Arc;
+
 use crate::interrupt::InterruptStack;
 use crate::memory::{allocate_frames_complex, deallocate_frames, Frame, PAGE_SIZE};
 use crate::paging::{PhysicalAddress, VirtualAddress};
@@ -5,10 +7,7 @@ use crate::context;
 use crate::scheme::memory::{MemoryScheme, MemoryType};
 use crate::syscall::error::{Error, EFAULT, EINVAL, ENOMEM, EPERM, ESRCH, Result};
 use crate::syscall::flag::{MapFlags, PhysallocFlags, PartialAllocStrategy, PhysmapFlags};
-
-use alloc::sync::Arc;
-
-use super::usercopy::UserSliceRw;
+use crate::syscall::usercopy::UserSliceRw;
 
 fn enforce_root() -> Result<()> {
     let contexts = context::contexts();
@@ -101,46 +100,6 @@ pub fn inner_physmap(physical_address: usize, size: usize, flags: PhysmapFlags)
         MemoryType::Writeback
     };
 
-    /*
-    let end = 1 << 52;
-    if (physical_address.saturating_add(size) as u64) > end || physical_address % PAGE_SIZE != 0 {
-        return Err(Error::new(EINVAL));
-    }
-
-    if size % PAGE_SIZE != 0 {
-        log::warn!("physmap size {} is not multiple of PAGE_SIZE {}", size, PAGE_SIZE);
-    }
-    let pages = NonZeroUsize::new(size.div_ceil(PAGE_SIZE)).ok_or(Error::new(EINVAL))?;
-
-    let addr_space = Arc::clone(context::current()?.read().addr_space()?);
-    let mut guard = addr_space.write();
-
-    guard.mmap_anywhere(pages, Default::default(), |dst_page, _, dst_mapper, dst_flusher| {
-        let mut page_flags = PageFlags::new().user(true);
-        if flags.contains(PHYSMAP_WRITE) {
-            page_flags = page_flags.write(true);
-        }
-        #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] // TODO: AARCH64
-        if flags.contains(PHYSMAP_WRITE_COMBINE) {
-            page_flags = page_flags.custom_flag(EntryFlags::HUGE_PAGE.bits(), true);
-        }
-        #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] // TODO: AARCH64
-        if flags.contains(PHYSMAP_NO_CACHE) {
-            page_flags = page_flags.custom_flag(EntryFlags::NO_CACHE.bits(), true);
-        }
-        Grant::physmap(
-            Frame::containing_address(PhysicalAddress::new(physical_address)),
-            PageSpan::new(
-                dst_page,
-                pages.get(),
-            ),
-            page_flags,
-            dst_mapper,
-            dst_flusher,
-        )
-    }).map(|page| page.start_address().data())
-    */
-
     MemoryScheme::physmap(physical_address, size, map_flags, memory_type)
 }
 pub fn physmap(physical_address: usize, size: usize, flags: PhysmapFlags) -> Result<usize> {