Merge #936

936: Fix AtomicCell is_lock_free test on armv7 r=taiki-e a=taiki-e



Co-authored-by: Taiki Endo <te316e89@gmail.com>

Author: bors[bot]

.github/workflows/ci.yml

@@ -58,9 +58,9 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@v1
-        with:
-          toolchain: ${{ matrix.rust }}
+      - name: Install Rust
+        # --no-self-update is necessary because the windows environment cannot self-update rustup.exe.
+        run: rustup update ${{ matrix.rust }} --no-self-update && rustup default ${{ matrix.rust }}
       - name: Install cross
         uses: taiki-e/install-action@cross
         if: matrix.target != ''
@@ -80,9 +80,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@v1
-        with:
-          toolchain: ${{ matrix.rust }}
+      - name: Install Rust
+        run: rustup update ${{ matrix.rust }} && rustup default ${{ matrix.rust }}
       - name: Install cargo-hack
         uses: taiki-e/install-action@cargo-hack
       - name: Check features
@@ -93,7 +92,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@nightly
+      - name: Install Rust
+        run: rustup update nightly && rustup default nightly
       - name: Install cargo-hack
         uses: taiki-e/install-action@cargo-hack
       - name: Install cargo-minimal-versions
@@ -109,7 +109,8 @@ jobs:
       pull-requests: write
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@nightly
+      - name: Install Rust
+        run: rustup update nightly && rustup default nightly
       - run: ci/no_atomic.sh
       - run: git add -N . && git diff --exit-code
         if: github.repository_owner != 'crossbeam-rs' || github.event_name != 'schedule'
@@ -141,7 +142,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@stable
+      - name: Install Rust
+        run: rustup update stable
       - name: rustfmt
         run: ./ci/rustfmt.sh
 
@@ -150,7 +152,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@stable
+      - name: Install Rust
+        run: rustup update stable
       - name: clippy
         run: ./ci/clippy.sh
 
@@ -159,7 +162,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@miri
+      - name: Install Rust
+        run: rustup toolchain install nightly --component miri && rustup default nightly
       - name: miri
         run: ./ci/miri.sh
 
@@ -168,7 +172,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@nightly
+      - name: Install Rust
+        run: rustup update nightly && rustup default nightly
       - name: Run sanitizers
         run: ./ci/san.sh
 
@@ -177,7 +182,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@stable
+      - name: Install Rust
+        run: rustup update stable
       - name: loom
         run: ./ci/crossbeam-epoch-loom.sh
 
@@ -186,7 +192,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@nightly
+      - name: Install Rust
+        run: rustup update nightly && rustup default nightly
       - name: docs
         run: ./ci/docs.sh
 

crossbeam-utils/tests/atomic_cell.rs

@@ -35,11 +35,7 @@ fn is_lock_free() {
     // of `AtomicU64` is `8`, so `AtomicCell<u64>` is not lock-free.
     assert_eq!(
         AtomicCell::<u64>::is_lock_free(),
-        cfg!(not(crossbeam_no_atomic_64))
-            && cfg!(any(
-                target_pointer_width = "64",
-                target_pointer_width = "128"
-            ))
+        cfg!(not(crossbeam_no_atomic_64)) && std::mem::align_of::<u64>() == 8
     );
     assert_eq!(mem::size_of::<U64Align8>(), 8);
     assert_eq!(mem::align_of::<U64Align8>(), 8);