Fix compilation since last rust

Thanks to @4lDO2 for all this. I just moved his changes to io_uring onto
the master branch of the kernel. I take no credit.

.cargo/config

@@ -0,0 +1,2 @@
+[build]
+rustflags = ["-Cembed-bitcode=yes"]

Cargo.lock

@@ -33,11 +33,11 @@ dependencies = [
  "linked_list_allocator 0.8.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "paste 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "raw-cpuid 8.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.56",
+ "redox_syscall 0.2.0",
  "rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab_allocator 0.3.1",
  "spin 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "x86 0.29.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "x86 0.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -113,7 +113,7 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.1.56"
+version = "0.2.0"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -182,7 +182,7 @@ dependencies = [
 
 [[package]]
 name = "x86"
-version = "0.29.0"
+version = "0.32.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bit_field 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -213,4 +213,4 @@ dependencies = [
 "checksum spin 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "ceac490aa12c567115b40b7b7fceca03a6c9d53d5defea066123debc83c5dc1f"
 "checksum spin 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
 "checksum spinning_top 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "32d801a3a53bcf5071f85fef8d5cab9e5f638fc5580a37e6eb7aba4b37438d24"
-"checksum x86 0.29.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6874753c331118b83f24d69325958b61f8ef47dbbc7aff2257a0bbe33fb24e3b"
+"checksum x86 0.32.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f8cc872a9a776500ccc6f49799729858738c946b8865fa7e3d6b47cc5dc3a8a7"

Cargo.toml

@@ -28,7 +28,7 @@ version = "0.1.16"
 default-features = false
 
 [dependencies.x86]
-version = "0.29.0"
+version = "0.32.0"
 default-features = false
 
 [features]

src/lib.rs

@@ -41,14 +41,13 @@
 #![deny(unreachable_patterns)]
 
 #![feature(allocator_api)]
-#![feature(asm)]
+#![feature(llvm_asm)]
 #![feature(concat_idents)]
 #![feature(const_fn)]
 #![feature(core_intrinsics)]
 #![feature(global_asm)]
 #![feature(integer_atomics)]
 #![feature(lang_items)]
-#![feature(matches_macro)] // stable in current Rust
 #![feature(naked_functions)]
 #![feature(ptr_internals)]
 #![feature(thread_local)]