mmio buddy新增guard，把映射的职责交由其守卫进行处理，并且守卫被drop的时候自动释放内存 #965

	name: Build Check

	on:
	push:
	branches: [ "master" ]
	pull_request:
	branches: [ "master" ]

	jobs:
	# ensure the toolchain is cached
	ensure-toolchain:
	uses: ./.github/workflows/cache-toolchain.yml

	build:

	runs-on: ubuntu-latest
	needs: [ensure-toolchain]

	steps:
	- uses: actions/checkout@v3

	- name: Cache DragonOS GCC
	id: cache-dragonos-gcc
	uses: actions/cache@v3
	env:
	cache-name: cache-dragonos-gcc
	with:
	path: \|
	~/opt
	key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('tools/build_gcc_toolchain.sh') }}

	- name: Cache build tools
	id: cache-build-tools
	uses: actions/cache@v3
	env:
	cache-name: cache-build-tools
	dadk_version: 0.1.2
	with:
	path: \|
	~/.cargo
	~/.rustup
	~/.bashrc
	key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ env.dadk_version }}-${{ hashFiles('.github/workflows/cache-toolchain.yml') }}


	- name: build the DragonOS
	run: bash -c "source ~/.cargo/env && export DragonOS_GCC=$HOME/opt/dragonos-gcc/gcc-x86_64-unknown-none/bin && make -j $(nproc) "

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