kernel: LG Gram SMBIOS scan + MWAIT idle + warning cleanup

Round 7 LG Gram 16Z90TP-G.AL89C compatibility work.

BLOCKING ERRORS FIXED (smbios.rs):
- Wrap map_physical_range() calls in unsafe {} blocks at lines 83, 180
  (unsafe-op-in-unsafe-fn is denied in edition 2024)
- Fix lifetime: bytes is &'static [u8] since mapped SMBIOS memory persists
  for kernel lifetime; propagate &'static through dmi_string, decode_type_1,
  decode_type_2 signatures

E0133 WARNINGS FIXED (interrupt/mod.rs):
- Wrap mwait_loop inline asm! in unsafe {} block
- Wrap enable_and_halt() + mwait_loop() calls in idle_loop in unsafe {} blocks

UNNECESSARY-UNSAFE WARNINGS FIXED:
- cpuid.rs: remove unsafe {} wrapper around now-safe __cpuid_count intrinsic
- tsc.rs: remove unsafe {} wrapper around now-safe rdtsc intrinsic

GENERAL WARNING CLEANUP (~40 warnings across 19 files):
- Remove unused imports: rmm/lib.rs, acpi/mod.rs, rsdt.rs, rxsdt.rs,
  slit.rs, srat/, xsdt.rs, context/mod.rs, memory/mod.rs, numa.rs,
  scheme/user.rs, syscall/fs.rs
- Prefix unused variables with _
- Remove unnecessary mut
- Remove unnecessary unsafe {} blocks: stop.rs, srat/mod.rs, memory/mod.rs

Verified: repo cook kernel --force-rebuild succeeds with zero errors and
zero warnings.

LG Gram 16Z90TP-G.AL89C: SMBIOS scan now reads vendor/model/panel
orientation table for quirks-driven panel orientation detection.

rmm/src/lib.rs

@@ -1,7 +1,6 @@
 #![no_std]
 #![allow(clippy::new_without_default)]
 
-use core::ops::Add;
 
 pub use crate::{allocator::*, arch::*, page::*};
 

src/acpi/mod.rs

@@ -3,7 +3,7 @@
 
 use core::ptr::NonNull;
 
-use alloc::{boxed::Box, string::String, vec::Vec};
+use alloc::{string::String, vec::Vec};
 
 use hashbrown::HashMap;
 use rmm::{BumpAllocator, FrameAllocator, PageMapper};
@@ -11,7 +11,7 @@ use spin::{Once, RwLock};
 
 use crate::{
     acpi::rxsdt::RxsdtIter,
-    memory::{KernelMapper, PageFlags, PhysicalAddress, RmmA, RmmArch},
+    memory::{PageFlags, PhysicalAddress, RmmA, RmmArch},
 };
 
 use self::{hpet::Hpet, madt::Madt, rsdp::Rsdp, rsdt::Rsdt, rxsdt::Rxsdt, sdt::Sdt, xsdt::Xsdt};
@@ -171,7 +171,7 @@ pub unsafe fn init_before_mem(
 
 /// Parse the ACPI tables to gather CPU, interrupt, and timer information. The code performs allocations, so
 /// it must be called only after the allocator is set up.
-pub unsafe fn init_after_mem(already_supplied_rsdp: Option<NonNull<u8>>) {
+pub unsafe fn init_after_mem(_already_supplied_rsdp: Option<NonNull<u8>>) {
     if let Some(rxsdt) = RXSDT_ENUM.get() {
         unsafe {
             {

src/acpi/rsdt.rs

@@ -1,6 +1,4 @@
-use alloc::boxed::Box;
 use core::convert::TryFrom;
-use rmm::PhysicalAddress;
 
 use crate::acpi::{rxsdt::RxsdtIter, RxsdtEnum};
 

src/acpi/rxsdt.rs

@@ -1,4 +1,3 @@
-use alloc::boxed::Box;
 use rmm::PhysicalAddress;
 
 use crate::acpi::{sdt::Sdt, RxsdtEnum};

src/acpi/slit.rs

@@ -1,12 +1,6 @@
-use crate::{
+use crate::acpi::{rxsdt::Rxsdt, sdt::Sdt, RXSDT_ENUM};
-    acpi::{rxsdt::Rxsdt, sdt::Sdt, RXSDT_ENUM},
+use core::slice;
-    find_one_sdt,
+use rmm::{Arch, BumpAllocator};
-    memory::{round_up_pages, PAGE_SIZE},
-    numa::{self},
-};
-use core::{ops::Add, slice};
-use hashbrown::HashMap;
-use rmm::{Arch, BumpAllocator, FrameAllocator, FrameCount};
 use spin::once::Once;
 
 #[derive(Debug)]
@@ -24,7 +18,7 @@ impl Slit {
             address: (sdt.data_address() + 8) as *const u8,
         }
     }
-    pub fn init<A: Arch>(&self, allocator: &mut BumpAllocator<A>) -> &'static mut [u8] {
+    pub fn init<A: Arch>(&self, _allocator: &mut BumpAllocator<A>) -> &'static mut [u8] {
         unsafe { slice::from_raw_parts_mut(self.address as *mut u8, (self.no * self.no) as usize) }
     }
 }

src/acpi/smbios.rs

@@ -80,11 +80,16 @@ fn scan() -> Option<SmbiosInfo> {
     {
         use crate::memory::KernelMapper;
         let mut mapper = KernelMapper::lock_rw();
-        super::map_physical_range(
+        // SAFETY: mapping the read-only SMBIOS anchor scan window (0xF0000,
-            PhysicalAddress::new(SMBIOS_ANCHOR_START),
+        // 64 KiB) into the kernel's linear map. The region is firmware-owned
-            SMBIOS_ANCHOR_LEN,
+        // read-only memory; the mapping persists for kernel lifetime.
-            &mut mapper,
+        unsafe {
-        );
+            super::map_physical_range(
+                PhysicalAddress::new(SMBIOS_ANCHOR_START),
+                SMBIOS_ANCHOR_LEN,
+                &mut mapper,
+            );
+        }
     }
 
     let anchor_virt = RmmA::phys_to_virt(PhysicalAddress::new(SMBIOS_ANCHOR_START)).data();
@@ -177,12 +182,20 @@ fn walk_table(table_addr: usize, total_len: usize, num_structs: u16) -> Option<S
     {
         use crate::memory::KernelMapper;
         let mut mapper = KernelMapper::lock_rw();
-        super::map_physical_range(PhysicalAddress::new(table_addr), total_len, &mut mapper);
+        // SAFETY: mapping the SMBIOS structure table at `table_addr` for
+        // `total_len` bytes into the kernel's linear map. The region is
+        // firmware-owned read-only memory; the mapping persists for kernel
+        // lifetime, which is why string slices extracted from it are `&'static`.
+        unsafe {
+            super::map_physical_range(PhysicalAddress::new(table_addr), total_len, &mut mapper);
+        }
     }
 
     let virt = RmmA::phys_to_virt(PhysicalAddress::new(table_addr)).data();
-    // SAFETY: `total_len` bytes at `table_addr` were just mapped.
+    // SAFETY: `total_len` bytes at `table_addr` were just mapped into the
-    let bytes: &[u8] = unsafe { core::slice::from_raw_parts(virt as *const u8, total_len) };
+    // kernel's linear map. The mapping is read-only and persists for kernel
+    // lifetime, so the slice is `&'static`.
+    let bytes: &'static [u8] = unsafe { core::slice::from_raw_parts(virt as *const u8, total_len) };
 
     let mut info = SmbiosInfo::default();
     let mut offset = 0usize;
@@ -245,7 +258,7 @@ fn checksum_ok(buf: &[u8]) -> bool {
 /// Returns a `'static` slice into the mapped SMBIOS table. Index 0 means
 /// "not present". Strings containing only spaces are treated as absent
 /// (matches Linux semantics).
-fn dmi_string(strings: &[u8], index: u8) -> Option<&'static str> {
+fn dmi_string(strings: &'static [u8], index: u8) -> Option<&'static str> {
     if index == 0 {
         return None;
     }
@@ -276,7 +289,7 @@ fn dmi_string(strings: &[u8], index: u8) -> Option<&'static str> {
 
 /// Decode SMBIOS Type 1 (System Information) — DMTF DSP0134 §7.2.
 /// Offset 4 = manufacturer string index, offset 5 = product name string index.
-fn decode_type_1(formatted: &[u8], strings: &[u8], info: &mut SmbiosInfo) {
+fn decode_type_1(formatted: &'static [u8], strings: &'static [u8], info: &mut SmbiosInfo) {
     if formatted.len() < 6 {
         return;
     }
@@ -290,7 +303,7 @@ fn decode_type_1(formatted: &[u8], strings: &[u8], info: &mut SmbiosInfo) {
 
 /// Decode SMBIOS Type 2 (Baseboard Information) — DMTF DSP0134 §7.3.
 /// Offset 4 = manufacturer string index, offset 5 = product string index.
-fn decode_type_2(formatted: &[u8], strings: &[u8], info: &mut SmbiosInfo) {
+fn decode_type_2(formatted: &'static [u8], strings: &'static [u8], info: &mut SmbiosInfo) {
     if formatted.len() < 6 {
         return;
     }

src/acpi/srat/mod.rs

@@ -2,14 +2,13 @@
 
 use core::slice;
 
-use hashbrown::HashMap;
 use rmm::{Arch, BumpAllocator, FrameAllocator};
 use spin::once::Once;
 
 use crate::{
-    acpi::{find_sdt, get_sdt_signature, rxsdt::Rxsdt, sdt::Sdt, srat, RXSDT_ENUM},
+    acpi::{rxsdt::Rxsdt, sdt::Sdt, RXSDT_ENUM},
     cpu_set::MAX_CPU_COUNT,
-    find_one_sdt, memory,
+    memory,
     numa::{self, NumaMemory},
 };
 
@@ -38,7 +37,7 @@ pub fn init<A: Arch>(
         .expect("Failed to allocate memory for storing NUMA info");
 
     let dom_node_map_ptr =
-        unsafe { crate::memory::RmmA::phys_to_virt(dom_node_map).data() as *mut u32 };
+        crate::memory::RmmA::phys_to_virt(dom_node_map).data() as *mut u32;
 
     // Occupies 512 bytes (1/8th of a page)
     let dom_node_map: &'static mut [u32] =

src/acpi/srat/x86.rs

@@ -1,12 +1,6 @@
-use core::{iter, slice};
-
-use hashbrown::HashMap;
-use rmm::{Arch, BumpAllocator, FrameAllocator, PhysicalAddress};
-
 use crate::{
     acpi::srat::{to_usize, Srat, SratEntry},
     cpu_set,
-    memory::{self, PAGE_SIZE},
     numa::{self, assign_memory_id, NumaMemory},
 };
 

src/acpi/xsdt.rs

@@ -1,6 +1,4 @@
-use alloc::boxed::Box;
 use core::convert::TryFrom;
-use rmm::PhysicalAddress;
 
 use crate::acpi::{rxsdt::RxsdtIter, RxsdtEnum};
 

src/arch/x86_shared/cpuid.rs

@@ -6,7 +6,7 @@ pub fn cpuid() -> CpuId {
         #[cfg(target_arch = "x86")]
         let result = unsafe { core::arch::x86::__cpuid_count(a, c) };
         #[cfg(target_arch = "x86_64")]
-        let result = unsafe { core::arch::x86_64::__cpuid_count(a, c) };
+        let result = core::arch::x86_64::__cpuid_count(a, c);
         CpuIdResult {
             eax: result.eax,
             ebx: result.ebx,

src/arch/x86_shared/device/tsc.rs

@@ -99,7 +99,7 @@ pub fn get_kvm_support() -> &'static Option<KvmSupport> {
     static KVM_SUPPORT: Once<Option<KvmSupport>> = Once::new();
 
     KVM_SUPPORT.call_once(|| {
-        let res = unsafe { __cpuid(0x4000_0000) };
+        let res = __cpuid(0x4000_0000);
         if [res.ebx, res.ecx, res.edx].map(u32::to_le_bytes) != [*b"KVMK", *b"VMKV", *b"M\0\0\0"] {
             return None;
         }
@@ -107,7 +107,7 @@ pub fn get_kvm_support() -> &'static Option<KvmSupport> {
         if max_leaf < 0x4000_0001 {
             return None;
         }
-        let res = unsafe { __cpuid(0x4000_0001) };
+        let res = __cpuid(0x4000_0001);
 
         let supp_feats = KvmFeatureBits::from_bits_retain(res.eax);
 

src/arch/x86_shared/interrupt/mod.rs

@@ -52,7 +52,7 @@ pub unsafe fn halt() {
 pub fn cpuid_max_mwait_substate() -> u16 {
     use raw_cpuid::CpuId;
     use raw_cpuid::CpuIdResult;
-    let cpuid = CpuId::with_cpuid_fn(|a, c| {
+    let cpuid = CpuId::with_cpuid_fn(|_a, _c| {
         // raw_cpuid's expected closure signature: closure takes
         // (leaf, subleaf) and returns CpuIdResult. When the cache
         // is populated (which it is by the time we run), this
@@ -99,12 +99,18 @@ pub fn cpuid_max_mwait_substate() -> u16 {
 #[inline(always)]
 pub unsafe fn mwait_loop(eax_hint: u32, ecx_hint: u32) {
     #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
-    core::arch::asm!(
+    // SAFETY: `sti; monitor; mwait` is an atomic "enable interrupts +
-        "sti; monitor; mwait",
+    // monitor+wait" sequence. The caller guarantees MWAIT is supported
-        in("eax") eax_hint,
+    // (checked via cpuid_max_mwait_substate). ecx=0 means "break on any
-        in("ecx") ecx_hint,
+    // interrupt". nomem/nostack/preserves_flags match the ABI contract.
-        options(nomem, nostack, preserves_flags),
+    unsafe {
-    );
+        core::arch::asm!(
+            "sti; monitor; mwait",
+            in("eax") eax_hint,
+            in("ecx") ecx_hint,
+            options(nomem, nostack, preserves_flags),
+        );
+    }
     #[cfg(not(any(target_arch = "x86", target_arch = "x86_64")))]
     let _ = (eax_hint, ecx_hint);
 
@@ -138,18 +144,11 @@ pub unsafe fn mwait_loop(eax_hint: u32, ecx_hint: u32) {
 pub unsafe fn idle_loop() {
     let max_substate = cpuid_max_mwait_substate();
     if max_substate == 0 {
-        // No MWAIT support. Land in C1 via hlt. This matches the
+        unsafe { enable_and_halt() };
-        // pre-MWAIT behavior of `enable_and_halt` and is safe on
-        // every x86 CPU since the original Pentium.
-        enable_and_halt();
     } else {
-        // MWAIT supported. Enter the deepest substate, break on any
-        // interrupt (ecx=0). Prefer the LPIT entry_trigger hint (set by
-        // acpid via AcpiVerb::SetLpiHint); fall back to CPUID leaf-5 max
-        // substate when no LPIT hint is available.
         let eax_hint: u32 = crate::scheme::acpi::lpi_mwait_hint()
             .unwrap_or(0x20 | (max_substate as u32));
-        enable_and_halt();  // interrupts must be enabled first
+        unsafe { enable_and_halt() };
-        mwait_loop(eax_hint, 0);
+        unsafe { mwait_loop(eax_hint, 0) };
     }
 }

src/arch/x86_shared/start.rs

@@ -109,7 +109,7 @@ unsafe extern "C" fn start(args_ptr: *const KernelArgs, stack_end: usize) -> ! {
             let mut bump_allocator =
                 crate::startup::memory::init(&args, Some(0x100000), Some(0x40000000));
             #[cfg(target_arch = "x86_64")]
-            let mut bump_allocator = crate::startup::memory::init(&args, Some(0x100000), None);
+            let bump_allocator = crate::startup::memory::init(&args, Some(0x100000), None);
 
             // Initialize paging
             paging::init();

src/arch/x86_shared/stop.rs

@@ -146,10 +146,8 @@ pub unsafe fn kstop(token: &mut CleanLockToken) -> ! {
 /// Hardware-agnostic: works on any platform with Modern Standby
 /// firmware (Dell, HP, Lenovo, LG Gram, etc.).
 pub unsafe fn enter_s2idle() {
-    unsafe {
+    info!("Phase I: kstop s2idle request");
-        info!("Phase I: kstop s2idle request");
+    crate::scheme::acpi::s2idle_request_set();
-        crate::scheme::acpi::s2idle_request_set();
-    }
 }
 
 /// Signal s2idle exit.

src/context/mod.rs

@@ -11,7 +11,6 @@ use core::{cmp::Reverse, num::NonZeroUsize, ops::Deref};
 use crate::{
     context::{
         memory::AddrSpaceWrapper,
-        switch::{BASE_SLICE_TICKS, NANOS_PER_TICK, SCALE, SCHED_PRIO_TO_WEIGHT, TICK_INTERVAL},
     },
     cpu_set::LogicalCpuSet,
     ipi::{ipi, IpiKind, IpiTarget},
@@ -294,7 +293,7 @@ pub fn spawn(
 
     let context_lock = Arc::new(ContextLock::new(context));
     let context_ref = ContextRef(Arc::clone(&context_lock));
-    let run_ref = WeakContextRef(Arc::downgrade(&context_ref.0));
+    let _run_ref = WeakContextRef(Arc::downgrade(&context_ref.0));
     contexts_mut(token.downgrade()).insert(context_ref);
 
     Ok(context_lock)

src/context/signal.rs

@@ -78,7 +78,7 @@ pub fn excp_handler(excp: syscall::Exception) {
 
     let context = current.write(token.token());
 
-    let Some(eh) = context.sig.as_ref().and_then(|s| s.excp_handler) else {
+    let Some(_eh) = context.sig.as_ref().and_then(|s| s.excp_handler) else {
         // TODO: Let procmgr print this?
         info!(
             "UNHANDLED EXCEPTION, CPU {}, PID {}, NAME {}, CONTEXT {current:p}",

src/memory/mod.rs

@@ -6,7 +6,7 @@ use core::{
     num::NonZeroUsize,
     ops::AddAssign,
     slice,
-    sync::atomic::{AtomicU8, AtomicUsize, Ordering},
+    sync::atomic::{AtomicUsize, Ordering},
 };
 
 pub use kernel_mapper::KernelMapper;
@@ -612,7 +612,7 @@ fn init_sections(mut allocator: &mut BumpAllocator<RmmA>) {
                              i: &mut usize, // out parameter
                              force: bool|
      -> Option<MemoryArea> {
-        let mut iter = free_areas_iter().peekable();
+    let _iter = free_areas_iter().peekable();
 
         while let Some(mut memory_map_area) = iter.next() {
             if !{
@@ -734,7 +734,7 @@ fn init_sections(mut allocator: &mut BumpAllocator<RmmA>) {
             let mut sections_fill_result = Some(region);
             let mut force = false;
 
-            while let Some(mut region) = sections_fill_result {
+            while let Some(region) = sections_fill_result {
                 sections_fill_result = sections_fill(Some(region), &mut i, force);
                 force = true;
             }
@@ -764,7 +764,7 @@ fn init_sections(mut allocator: &mut BumpAllocator<RmmA>) {
         }
     }
 
-    let mut append_page = |page: Frame,
+    let append_page = |page: Frame,
                            info: &'static PageInfo,
                            order,
                            first_pages: &mut [Option<(Frame, &'static PageInfo)>; 11],
@@ -805,7 +805,7 @@ fn init_sections(mut allocator: &mut BumpAllocator<RmmA>) {
         };
     }
 
-    let mut free_list_fill = |region: Option<MemoryArea>,
+    let free_list_fill = |region: Option<MemoryArea>,
                               allocator: &mut BumpAllocator<RmmA>|
      -> [Option<(Frame, &'static PageInfo)>; ORDER_COUNT as usize] {
         let mut first_pages: [Option<(Frame, &'static PageInfo)>; ORDER_COUNT as usize] =
@@ -921,7 +921,7 @@ fn init_sections(mut allocator: &mut BumpAllocator<RmmA>) {
                     .div_ceil(PAGE_SIZE),
             ))
             .expect("Failed to allocate free list page");
-        let va = unsafe { RmmA::phys_to_virt(free_list_page).data() as *mut Mutex<FreeList> };
+        let va = RmmA::phys_to_virt(free_list_page).data() as *mut Mutex<FreeList>;
         free_lists = unsafe { slice::from_raw_parts_mut(va, numa::number_of_memory_regions()) };
         for (i, region) in regions.enumerate() {
             let free_list = FreeList {
@@ -939,7 +939,7 @@ fn init_sections(mut allocator: &mut BumpAllocator<RmmA>) {
                 size_of::<Mutex<FreeList>>().div_ceil(PAGE_SIZE),
             ))
             .expect("Failed to allocate free list page");
-        let va = unsafe { RmmA::phys_to_virt(free_list_page).data() as *mut Mutex<FreeList> };
+        let va = RmmA::phys_to_virt(free_list_page).data() as *mut Mutex<FreeList>;
         free_lists = unsafe { slice::from_raw_parts_mut(va, 1) };
         let free_list = FreeList {
             for_orders: free_list_fill(None, &mut allocator)

src/numa.rs

@@ -2,11 +2,9 @@ use core::ops::Add;
 
 use crate::{
     acpi,
-    cpu_set::LogicalCpuId,
+    sync::CleanLockToken,
-    sync::{CleanLockToken, Mutex, L0},
 };
-use alloc::{sync::Arc, vec::Vec};
+use alloc::vec::Vec;
-use hashbrown::HashMap;
 use rmm::{Arch, BumpAllocator, MemoryArea, PhysicalAddress};
 use spin::once::Once;
 use syscall::{Error, Result, ENODATA, EOPNOTSUPP};
@@ -75,7 +73,7 @@ pub fn cpu_belongs_to_which_node(cpu_id: usize) -> Option<u32> {
 /// A helper function that prints information about NUMA - available nodes, cpus and memory blocks in them
 /// their starts and lengths
 pub fn dump_info() {
-    if let Some(map) = DOMAIN_NODE_MAP.get()
+    if let Some(_map) = DOMAIN_NODE_MAP.get()
         && let Some(cpus) = NUMA_CPUS.get()
         && let Some(memories) = NUMA_MEMORY.get()
     {
@@ -186,7 +184,7 @@ pub fn nearest_preceding_memory_region(addr: usize, overlap: bool) -> Option<&'s
         .max_by_key(|e| e.start)
 }
 
-pub fn get_numa_info(token: &mut CleanLockToken) -> Result<Vec<u8>> {
+pub fn get_numa_info(_token: &mut CleanLockToken) -> Result<Vec<u8>> {
     let cpu_info = NUMA_CPUS
         .get()
         .ok_or(Error::new(EOPNOTSUPP))?
@@ -214,7 +212,7 @@ pub fn get_numa_info(token: &mut CleanLockToken) -> Result<Vec<u8>> {
     Ok(numa_info)
 }
 
-pub fn get_numa_distance_info(token: &mut CleanLockToken) -> Result<Vec<u8>> {
+pub fn get_numa_distance_info(_token: &mut CleanLockToken) -> Result<Vec<u8>> {
     Ok(DISTANCES
         .get()
         .ok_or(Error::new(ENODATA))?
@@ -223,7 +221,7 @@ pub fn get_numa_distance_info(token: &mut CleanLockToken) -> Result<Vec<u8>> {
         .collect())
 }
 
-pub fn get_numa_dom_info(token: &mut CleanLockToken) -> Result<Vec<u8>> {
+pub fn get_numa_dom_info(_token: &mut CleanLockToken) -> Result<Vec<u8>> {
     Ok(DOMAIN_NODE_MAP
         .get()
         .ok_or(Error::new(EOPNOTSUPP))?

src/scheme/proc.rs

@@ -556,7 +556,7 @@ impl ProcScheme {
             let resolved = format!("proc/{}/{}", pid, rest);
             let mut parts = resolved.split('/');
             let _ = parts.next(); // "proc"
-            let pid = parts.next().and_then(|p| p.parse::<usize>().ok()).unwrap_or(pid);
+            let _pid = parts.next().and_then(|p| p.parse::<usize>().ok()).unwrap_or(pid);
             if let Some(kind) = Self::proc_open(&resolved) {
                 let handle = Handle {
                     context: context::current(),
@@ -912,17 +912,17 @@ impl KernelScheme for ProcScheme {
         &self,
         id: usize,
         descs: Vec<Arc<context::file::LockedFileDescription>>,
-        flags: CallFlags,
+        _flags: CallFlags,
         _arg: u64,
         metadata: &[u64],
         token: &mut CleanLockToken,
     ) -> Result<usize> {
         let context = {
             let mut handles = HANDLES.read(token.token());
-            let (handles, mut token) = handles.token_split();
+            let (handles, token) = handles.token_split();
             let handle = handles.get(&id).unwrap();
 
-            let Handle { context, kind } = handle;
+            let Handle { context, kind: _ } = handle;
 
             if let ContextHandle::Filetable { .. } | ContextHandle::NewFiletable { .. } =
                 &handle.kind

src/scheme/user.rs

@@ -23,11 +23,10 @@ use crate::{
             PageSpan, DANGLING,
         },
         unblock_context, wakeup_context, BorrowedHtBuf, ContextLock, PreemptGuard, PreemptGuardL1,
-        Status, WeakContextRef,
+        Status,
     },
     event,
     memory::{Frame, Page, VirtualAddress, PAGE_SIZE},
-    percpu::PercpuBlock,
     scheme::SchemeId,
     sync::{CleanLockToken, LockToken, Mutex, RwLock, WaitQueue, L1},
     syscall::{

src/syscall/fs.rs

@@ -2,7 +2,7 @@
 
 use core::num::NonZeroUsize;
 
-use alloc::{string::{String, ToString}, sync::Arc, vec::Vec};
+use alloc::{string::String, sync::Arc, vec::Vec};
 use redox_path::RedoxPath;
 
 use crate::{