remove lazystatic in wdk-alloc

Signed-off-by: Melvin Wang <[email protected]>

crates/wdk-alloc/Cargo.toml

@@ -11,7 +11,6 @@ categories = ["memory-management", "no-std", "hardware-support"]
 
 [dependencies]
 wdk-sys.workspace = true
-lazy_static = { version = "1.4.0", features = ["spin_no_std"] }
 
 [dev-dependencies]
 wdk-sys = { workspace = true, features = ["test-stubs"] }

crates/wdk-alloc/src/lib.rs

@@ -10,7 +10,6 @@
 
 use core::alloc::{GlobalAlloc, Layout};
 
-use lazy_static::lazy_static;
 use wdk_sys::{
     ntddk::{ExAllocatePool2, ExFreePool},
     POOL_FLAG_NON_PAGED,
@@ -19,22 +18,13 @@ use wdk_sys::{
 };
 pub struct WDKAllocator;
 
-// The value of memory tags are stored in little-endian order, so it is
-// convenient to reverse the order for readability in tooling(ie. Windbg)
-// FIXME: replace lazy_static with std::Lazy once available: https://github.com/rust-lang/rust/issues/109736
-lazy_static! {
-    static ref RUST_TAG: ULONG = u32::from_ne_bytes(
-        #[allow(clippy::string_lit_as_bytes)] // A u8 slice is required here
-        "rust"
-            .as_bytes()
-            .try_into()
-            .expect("tag string.as_bytes() should be able to convert into [u8; 4]"),
-    );
-}
+// The value of memory tags are stored in little-endian order, so it is
+// convenient to reverse the order for readability in tooling (ie. Windbg)
+const RUST_TAG: ULONG = u32::from_ne_bytes(*b"rust");
 
 unsafe impl GlobalAlloc for WDKAllocator {
     unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
-        let ptr = ExAllocatePool2(POOL_FLAG_NON_PAGED, layout.size() as SIZE_T, *RUST_TAG);
+        let ptr = ExAllocatePool2(POOL_FLAG_NON_PAGED, layout.size() as SIZE_T, RUST_TAG);
         assert!(!ptr.is_null(), "wdk-alloc failed to allocate memory.");
         ptr.cast()
     }