Remove unused import

kernel/src/arch/mipsel/board/malta/mod.rs

@@ -1,6 +1,5 @@
 use crate::drivers::bus::pci;
 use crate::drivers::gpu::fb::{self, FramebufferInfo};
-use alloc::string::String;
 use mips::registers::cp0;
 
 pub mod consts;

kernel/src/arch/mipsel/interrupt.rs

@@ -1,12 +1,10 @@
 pub use self::context::*;
 use crate::arch::paging::get_root_page_table_ptr;
-use crate::drivers::{DRIVERS, IRQ_MANAGER};
+use crate::drivers::IRQ_MANAGER;
 use log::*;
 use mips::addr::*;
 use mips::interrupts;
-use mips::paging::{
-    PageTable as MIPSPageTable, PageTableEntry, PageTableFlags as EF, TwoLevelPageTable,
-};
+use mips::paging::PageTable as MIPSPageTable;
 use mips::registers::cp0;
 use mips::tlb;
 
@@ -154,7 +152,7 @@ fn syscall(tf: &mut TrapFrame) {
     );
 
     // temporary solution for ThinPad
-    if (tf.v0 == 0) {
+    if tf.v0 == 0 {
         warn!("Syscall ID = 0");
         tf.v0 = unsafe { *((tf.sp + 28) as *const usize) };
     }
@@ -162,7 +160,7 @@ fn syscall(tf: &mut TrapFrame) {
     let ret = crate::syscall::syscall(tf.v0, arguments, tf) as isize;
     // comply with mips n32 abi, always return a positive value
     // https://git.musl-libc.org/cgit/musl/tree/arch/mipsn32/syscall_arch.h
-    if (ret < 0) {
+    if ret < 0 {
         tf.v0 = (-ret) as usize;
         tf.a3 = 1;
     } else {

kernel/src/arch/mipsel/memory.rs

@@ -1,8 +1,6 @@
 use crate::arch::paging::*;
 use crate::consts::{KERNEL_OFFSET, MEMORY_END, MEMORY_OFFSET};
-use crate::memory::{init_heap, Linear, MemoryAttr, MemorySet, FRAME_ALLOCATOR};
-use core::mem;
-use log::*;
+use crate::memory::{init_heap, FRAME_ALLOCATOR};
 use rcore_memory::PAGE_SIZE;
 
 /// Initialize the memory management module

kernel/src/arch/mipsel/mod.rs

@@ -9,7 +9,6 @@ pub mod rand;
 pub mod syscall;
 pub mod timer;
 
-use log::*;
 use mips::registers::cp0;
 
 #[cfg(feature = "board_malta")]

kernel/src/arch/riscv/interrupt.rs

@@ -1,5 +1,5 @@
 pub use self::context::*;
-use crate::drivers::{DRIVERS, IRQ_MANAGER};
+use crate::drivers::IRQ_MANAGER;
 use log::*;
 use riscv::register::*;
 

kernel/src/arch/riscv/memory.rs

@@ -1,10 +1,9 @@
-use crate::consts::{KERNEL_OFFSET, MEMORY_END, MEMORY_OFFSET, PHYSICAL_MEMORY_OFFSET};
-use crate::memory::{init_heap, Linear, MemoryAttr, MemorySet, FRAME_ALLOCATOR};
+use crate::consts::{KERNEL_OFFSET, MEMORY_END, MEMORY_OFFSET};
+use crate::memory::{init_heap, MemorySet, FRAME_ALLOCATOR};
 use core::mem;
 use log::*;
 use rcore_memory::PAGE_SIZE;
-use riscv::register::satp;
-use riscv::{addr::*, register::sstatus};
+use riscv::register::sstatus;
 
 /// Initialize the memory management module
 pub fn init(dtb: usize) {

kernel/src/arch/riscv/mod.rs

@@ -22,7 +22,6 @@ pub mod timer;
 
 use crate::memory::phys_to_virt;
 use core::sync::atomic::{AtomicBool, Ordering};
-use log::*;
 
 #[no_mangle]
 pub extern "C" fn rust_main(hartid: usize, device_tree_paddr: usize) -> ! {
@@ -88,7 +87,7 @@ const BOOT_HART_ID: usize = 0;
 #[cfg(feature = "board_u540")]
 const BOOT_HART_ID: usize = 1;
 
-/// Constant & Macro for `trap.asm`
+// Constant & Macro for `trap.asm`
 #[cfg(target_arch = "riscv32")]
 global_asm!(
     r"

kernel/src/arch/riscv/paging.rs

@@ -6,11 +6,7 @@ use rcore_memory::paging::*;
 use riscv::addr::*;
 use riscv::asm::{sfence_vma, sfence_vma_all};
 use riscv::paging::{FrameAllocator, FrameDeallocator};
-use riscv::paging::{
-    Mapper, PageTable as RvPageTable, PageTableEntry, PageTableFlags as EF, PageTableType,
-    RecursivePageTable,
-};
-use riscv::register::satp;
+use riscv::paging::{Mapper, PageTable as RvPageTable, PageTableEntry, PageTableFlags as EF};
 
 #[cfg(target_arch = "riscv32")]
 type TopLevelPageTable<'a> = riscv::paging::Rv32PageTable<'a>;
@@ -199,7 +195,7 @@ impl PageTableExt for PageTableImpl {
         }
         #[cfg(target_arch = "riscv64")]
         for i in 509..512 {
-            if (i == 510) {
+            if i == 510 {
                 // MMIO range 0x60000000 - 0x7FFFFFFF does not work as a large page, dunno why
                 continue;
             }

kernel/src/arch/x86_64/board/mod.rs

@@ -1,7 +1,5 @@
-use crate::consts::KERNEL_OFFSET;
 use crate::drivers::gpu::fb::{self, ColorDepth, ColorFormat, FramebufferInfo};
 use crate::memory::phys_to_virt;
-use core::mem::zeroed;
 use rboot::BootInfo;
 
 pub fn init_driver(boot_info: &BootInfo) {
@@ -17,7 +15,7 @@ pub fn init_driver(boot_info: &BootInfo) {
         xoffset: 0,
         yoffset: 0,
         depth: ColorDepth::ColorDepth32,
-        format: fb::ColorFormat::RGBA8888,
+        format: ColorFormat::RGBA8888,
         paddr: info.fb_addr as usize,
         vaddr: phys_to_virt(info.fb_addr as usize),
         screen_size: info.fb_size as usize,

kernel/src/arch/x86_64/interrupt/handler.rs

@@ -66,7 +66,7 @@
 
 use super::consts::*;
 use super::TrapFrame;
-use crate::drivers::{DRIVERS, IRQ_MANAGER};
+use crate::drivers::IRQ_MANAGER;
 use bitflags::*;
 use log::*;
 

kernel/src/backtrace.rs

@@ -1,5 +1,4 @@
 use core::mem::size_of;
-use rcore_memory::PAGE_SIZE;
 
 extern "C" {
     fn stext();
@@ -165,6 +164,7 @@ pub fn backtrace() {
                 // Kernel stack at 0x0000_57ac_0000_0000 (defined in bootloader crate)
                 // size = 512 pages
                 current_fp = *(current_fp as *const usize).offset(0);
+                use rcore_memory::PAGE_SIZE;
                 if current_fp >= 0x0000_57ac_0000_0000 + 512 * PAGE_SIZE - size_of::<usize>()
                     && current_fp <= 0xffff_ff00_0000_0000
                 {

kernel/src/drivers/block/virtio_blk.rs

@@ -1,11 +1,9 @@
 use alloc::string::String;
 use alloc::sync::Arc;
 
-use log::*;
 use virtio_drivers::{VirtIOBlk, VirtIOHeader};
 
 use super::super::{DeviceType, Driver, BLK_DRIVERS, DRIVERS, IRQ_MANAGER};
-use crate::memory::phys_to_virt;
 use crate::sync::SpinNoIrqLock as Mutex;
 
 struct VirtIOBlkDriver(Mutex<VirtIOBlk<'static>>);

kernel/src/drivers/bus/virtio_mmio.rs

@@ -8,7 +8,7 @@ use super::super::block::virtio_blk;
 use super::super::gpu::virtio_gpu;
 use super::super::input::virtio_input;
 use super::super::net::virtio_net;
-use crate::memory::{phys_to_virt, virt_to_phys};
+use crate::memory::phys_to_virt;
 
 pub fn virtio_probe(node: &Node) {
     let reg = match node.prop_raw("reg") {

kernel/src/drivers/gpu/fb.rs

@@ -2,7 +2,6 @@
 
 use alloc::string::String;
 use core::fmt;
-use lazy_static::lazy_static;
 use log::*;
 use spin::Mutex;
 

kernel/src/drivers/gpu/virtio_gpu.rs

@@ -1,7 +1,6 @@
 use alloc::string::String;
 use alloc::sync::Arc;
 
-use log::*;
 use virtio_drivers::{VirtIOGpu, VirtIOHeader};
 
 use super::super::{DeviceType, Driver, DRIVERS, IRQ_MANAGER};

kernel/src/drivers/net/virtio_net.rs

@@ -2,7 +2,6 @@ use alloc::format;
 use alloc::string::String;
 use alloc::sync::Arc;
 
-use log::*;
 use smoltcp::phy::{self, DeviceCapabilities};
 use smoltcp::time::Instant;
 use smoltcp::wire::{EthernetAddress, Ipv4Address};
@@ -10,7 +9,6 @@ use smoltcp::Result;
 use virtio_drivers::{VirtIOHeader, VirtIONet};
 
 use super::super::{DeviceType, Driver, DRIVERS, IRQ_MANAGER, NET_DRIVERS};
-use crate::memory::phys_to_virt;
 use crate::sync::SpinNoIrqLock as Mutex;
 
 #[derive(Clone)]

kernel/src/fs/device.rs

@@ -8,6 +8,7 @@ use crate::arch::driver::ide;
 
 #[cfg(target_arch = "aarch64")]
 use crate::arch::board::emmc;
+#[cfg(target_arch = "aarch64")]
 use crate::sync::SpinNoIrqLock as Mutex;
 
 pub struct MemBuf(RwLock<&'static mut [u8]>);

kernel/src/fs/epoll.rs

@@ -1,11 +1,8 @@
 use crate::fs::FileLike;
-use crate::memory::MemorySet;
 use crate::process::Process;
-use crate::sync::{Condvar, SpinNoIrqLock};
+use crate::sync::SpinNoIrqLock;
 use crate::syscall::{SysError, SysResult};
 use alloc::{collections::BTreeMap, collections::BTreeSet};
-use core::mem::size_of;
-use core::slice;
 
 pub struct EpollInstance {
     pub events: BTreeMap<usize, EpollEvent>,
@@ -29,7 +26,7 @@ impl EpollInstance {
     }
 
     pub fn control(&mut self, op: usize, fd: usize, event: &EpollEvent) -> SysResult {
-        match (op as i32) {
+        match op as i32 {
             EPollCtlOp::ADD => {
                 self.events.insert(fd, event.clone());
                 self.newCtlList.lock().insert(fd);

kernel/src/fs/file_like.rs

@@ -4,10 +4,8 @@ use super::ioctl::*;
 use super::FileHandle;
 use crate::fs::epoll::EpollInstance;
 use crate::net::Socket;
-use crate::sync::Condvar;
 use crate::syscall::{SysError, SysResult};
 use alloc::boxed::Box;
-use alloc::vec::Vec;
 use rcore_fs::vfs::PollStatus;
 
 // TODO: merge FileLike to FileHandle ?

kernel/src/fs/mod.rs

@@ -1,14 +1,11 @@
 use alloc::{sync::Arc, vec::Vec};
 
-use rcore_fs::dev::block_cache::BlockCache;
 use rcore_fs::vfs::*;
 use rcore_fs_devfs::{special::*, DevFS};
 use rcore_fs_mountfs::MountFS;
 use rcore_fs_ramfs::RamFS;
 use rcore_fs_sfs::SimpleFileSystem;
 
-use crate::drivers::BlockDriver;
-
 pub use self::file::*;
 pub use self::file_like::*;
 pub use self::pipe::Pipe;
@@ -50,6 +47,8 @@ lazy_static! {
         let device = {
             #[cfg(any(target_arch = "riscv32", target_arch = "riscv64", target_arch = "x86_64"))]
             {
+                use crate::drivers::BlockDriver;
+                use rcore_fs::dev::block_cache::BlockCache;
                 let driver = BlockDriver(
                     crate::drivers::BLK_DRIVERS
                         .read().iter()

kernel/src/fs/pipe.rs

@@ -1,6 +1,6 @@
 //! Implement INode for Pipe
 
-use alloc::{collections::vec_deque::VecDeque, string::String, sync::Arc};
+use alloc::{collections::vec_deque::VecDeque, sync::Arc};
 use core::any::Any;
 
 use rcore_fs::vfs::*;

kernel/src/fs/pseudo.rs

@@ -1,6 +1,6 @@
 //! Pseudo file system INode
 
-use alloc::{string::String, sync::Arc, vec::Vec};
+use alloc::vec::Vec;
 use core::any::Any;
 
 use rcore_fs::vfs::*;

kernel/src/fs/random.rs

@@ -1,11 +1,10 @@
 //! Implement INode for RandomINode
 
-use alloc::{collections::vec_deque::VecDeque, string::String, sync::Arc};
+use alloc::sync::Arc;
 use core::any::Any;
 
 use rcore_fs::vfs::*;
 
-use crate::sync::Condvar;
 use crate::sync::SpinNoIrqLock as Mutex;
 
 pub struct RandomINodeData {

kernel/src/fs/stdio.rs

@@ -1,12 +1,11 @@
 //! Implement INode for Stdin & Stdout
 
-use alloc::{collections::vec_deque::VecDeque, string::String, sync::Arc};
+use alloc::{collections::vec_deque::VecDeque, sync::Arc};
 use core::any::Any;
 
 use rcore_fs::vfs::*;
 
 use super::ioctl::*;
-use crate::process::Process;
 use crate::sync::Condvar;
 use crate::sync::SpinNoIrqLock as Mutex;
 

kernel/src/fs/vga.rs

@@ -1,8 +1,6 @@
 use rcore_fs::vfs::*;
 
 use crate::drivers::gpu::fb::{ColorFormat, FramebufferInfo, FRAME_BUFFER};
-use crate::memory::phys_to_virt;
-use alloc::{string::String, sync::Arc, vec::Vec};
 use core::any::Any;
 
 #[derive(Default)]

kernel/src/ipc/semary.rs

@@ -1,6 +1,5 @@
 use crate::sync::Semaphore;
-use crate::sync::SpinLock as Mutex;
-use alloc::{boxed::Box, collections::BTreeMap, string::String, sync::Arc, sync::Weak, vec::Vec};
+use alloc::{collections::BTreeMap, sync::Arc, sync::Weak, vec::Vec};
 use core::ops::Index;
 use spin::RwLock;
 

kernel/src/lkm/api.rs

@@ -1,7 +1,5 @@
 use super::*;
-use crate::lkm::manager::ModuleManager;
 use crate::lkm::structs::LoadedModule;
-use alloc::boxed::Box;
 use alloc::string::String;
 use alloc::sync::Arc;
 use core::alloc::{GlobalAlloc, Layout};
@@ -10,7 +8,7 @@ use core::slice::from_raw_parts;
 pub fn get_module(this_module: usize) -> &'static mut LoadedModule {
     unsafe {
         let ptr = this_module as *mut LoadedModule;
-        &mut (*ptr) as (&'static mut LoadedModule)
+        &mut (*ptr) as &'static mut LoadedModule
     }
 }
 

kernel/src/lkm/kernelvm.rs

@@ -1,14 +1,10 @@
 // Simple kernel memory set for kernel virtual memory
 use crate::arch::paging::PageTableImpl;
-use crate::consts::*;
 use crate::memory::GlobalFrameAlloc;
 use crate::sync::SpinLock as Mutex;
 use alloc::vec::*;
-use buddy_system_allocator::*;
-use core::alloc::Layout;
 use core::mem::ManuallyDrop;
 use core::ops::DerefMut;
-use core::ptr::NonNull;
 use lazy_static::lazy_static;
 use rcore_memory::memory_set::handler::{ByFrame, MemoryHandler};
 use rcore_memory::memory_set::MemoryAttr;
@@ -119,7 +115,7 @@ impl VirtualArea {
         parent: &mut VirtualSpace,
     ) -> VirtualArea {
         let aligned_start_addr = page_addr - page_addr % PAGE_SIZE;
-        let mut aligned_end = (page_addr + size + PAGE_SIZE - 1);
+        let mut aligned_end = page_addr + size + PAGE_SIZE - 1;
         aligned_end = aligned_end - aligned_end % PAGE_SIZE;
         let lock = parent.allocator.lock();
         let mut active_pt = lock.kernel_table();

kernel/src/lkm/manager.rs

@@ -2,36 +2,26 @@ use super::api::*;
 use super::const_reloc as loader;
 use super::kernelvm::*;
 use super::structs::*;
-use crate::consts::*;
 use crate::lkm::structs::ModuleState::{Ready, Unloading};
-use crate::memory::GlobalFrameAlloc;
-use crate::sync::{Condvar, SpinLock as Mutex};
+use crate::sync::SpinLock as Mutex;
 use crate::syscall::SysError::*;
 use crate::syscall::SysResult;
 use alloc::boxed::Box;
 use alloc::collections::btree_map::BTreeMap;
-use alloc::prelude::*;
 use alloc::string::*;
 use alloc::sync::Arc;
 use alloc::vec::*;
-use core::borrow::BorrowMut;
 use core::mem::transmute;
-use core::slice;
 use lazy_static::lazy_static;
-use rcore_memory::memory_set::handler::{ByFrame, MemoryHandler};
 use rcore_memory::memory_set::MemoryAttr;
-use rcore_memory::{Page, PAGE_SIZE};
+use rcore_memory::PAGE_SIZE;
 use xmas_elf::dynamic::Tag;
 use xmas_elf::program::Type::Load;
 use xmas_elf::sections::SectionData;
 use xmas_elf::sections::SectionData::{DynSymbolTable64, Dynamic64, Undefined};
 use xmas_elf::symbol_table::DynEntry64;
 use xmas_elf::symbol_table::Entry;
-use xmas_elf::{
-    header,
-    program::{Flags, Type},
-    ElfFile,
-};
+use xmas_elf::{header, ElfFile};
 // The symbol data table.
 global_asm!(include_str!("symbol_table.asm"));
 
@@ -96,15 +86,15 @@ impl ModuleManager {
             return;
         }
         use compression::prelude::*;
-        let zipped_symbols =
-            unsafe { slice::from_raw_parts(symbol_table_start as *const u8, symbol_table_len) }
+        let zipped_symbols = unsafe {
+            core::slice::from_raw_parts(symbol_table_start as *const u8, symbol_table_len)
+        }
         .to_vec();
 
         let real_symbols = zipped_symbols
             .decode(&mut GZipDecoder::new())
             .collect::<Result<Vec<_>, _>>()
             .unwrap();
-        use core::slice;
         use core::str::from_utf8;
         self.init_kernel_symbols(from_utf8(&real_symbols).unwrap());
     }

kernel/src/sync/condvar.rs

@@ -1,6 +1,6 @@
 use super::*;
+use crate::process::thread_manager;
 use crate::process::Process;
-use crate::process::{current_thread, thread_manager};
 use crate::thread;
 use alloc::collections::VecDeque;
 use alloc::sync::Arc;

kernel/src/syscall/custom.rs

@@ -1,7 +1,5 @@
 //! Custom nonstandard syscalls
 use super::*;
-use rcore_memory::memory_set::handler::Linear;
-use rcore_memory::memory_set::MemoryAttr;
 
 impl Syscall<'_> {
     /// Allocate this PCI device to user space
@@ -9,6 +7,9 @@ impl Syscall<'_> {
     #[cfg(target_arch = "x86_64")]
     pub fn sys_map_pci_device(&mut self, vendor: usize, product: usize) -> SysResult {
         use crate::drivers::bus::pci;
+        use rcore_memory::memory_set::handler::Linear;
+        use rcore_memory::memory_set::MemoryAttr;
+
         info!(
             "map_pci_device: vendor: {:x}, product: {:x}",
             vendor, product

kernel/src/syscall/fs.rs

@@ -8,18 +8,14 @@ use rcore_fs::vfs::Timespec;
 use crate::drivers::SOCKET_ACTIVITY;
 use crate::fs::*;
 use crate::memory::MemorySet;
-use crate::sync::{Condvar, SpinNoIrqLock};
+use crate::sync::Condvar;
 use crate::trap::TICK_ACTIVITY;
-use alloc::{collections::BTreeMap, collections::BTreeSet};
 
 use bitvec::prelude::{BitSlice, BitVec, LittleEndian};
 
 use super::*;
 use crate::fs::epoll::EpollInstance;
-use crate::net::server;
 use crate::process::Process;
-use alloc::collections::VecDeque;
-use bitflags::_core::task::Poll;
 use rcore_fs::vfs::PollStatus;
 
 impl Syscall<'_> {
@@ -394,7 +390,6 @@ impl Syscall<'_> {
 
         let begin_time_ms = crate::trap::uptime_msec();
         let condition = move || {
-            use PollEvents as PE;
             let mut proc = self.process();
 
             let epollInstance = match proc.get_epoll_instance_mut(epfd) {

kernel/src/syscall/ipc.rs

@@ -1,9 +1,4 @@
-use crate::sync::Semaphore;
-use crate::sync::SpinLock as Mutex;
-use alloc::{boxed::Box, collections::BTreeMap, string::String, sync::Arc, sync::Weak, vec::Vec};
 use bitflags::*;
-use core::cell::UnsafeCell;
-use spin::RwLock;
 
 pub use crate::ipc::*;
 

kernel/src/syscall/lkm.rs

@@ -1,8 +1,5 @@
 use crate::lkm::manager::ModuleManager;
-use crate::sync::Mutex;
 use crate::syscall::{check_and_clone_cstr, SysResult, Syscall};
-use alloc::collections::btree_map::BTreeMap;
-use compression::prelude::Action;
 
 impl Syscall<'_> {
     pub fn sys_init_module(