Merge branch 'update-toolchain-2022' into 'master'

Cargo.lock

Cargo.toml

Xargo.toml

rmm

src/arch/x86_64/interrupt/exception.rs

src/arch/x86_64/interrupt/handler.rs

src/arch/x86_64/interrupt/irq.rs

src/arch/x86_64/interrupt/mod.rs

src/arch/x86_64/interrupt/syscall.rs

src/arch/x86_64/interrupt/trace.rs

src/arch/x86_64/start.rs

src/arch/x86_64/stop.rs

src/context/arch/x86_64.rs

src/lib.rs

syscall

targets/x86_64-unknown-kernel.json