clippy: fix borrow_as_ptr lint

Cargo.toml

@@ -130,3 +130,9 @@ static_assertions = "1.1"
 testutil = { path = "testutil" }
 # In tests, unlike in production, zerocopy-derive is not optional
 zerocopy-derive = { version = "=0.8.39", path = "zerocopy-derive" }
+
+[workspace.lints.clippy]
+borrow_as_ptr = "warn"
+
+[lints]
+workspace = true

src/ref.rs

@@ -1230,20 +1230,18 @@ mod tests {
     #[allow(unstable_name_collisions)]
     #[allow(clippy::as_conversions)]
     fn test_into_ref_mut() {
-        #[allow(unused)]
-        use crate::util::AsAddress as _;
-
         let mut buf = Align::<[u8; 8], u64>::default();
+        let buf_ptr = buf.t.as_mut_ptr();
+
         let r = Ref::<_, u64>::from_bytes(&buf.t[..]).unwrap();
         let rf = Ref::into_ref(r);
         assert_eq!(rf, &0u64);
-        let buf_addr = (&buf.t as *const [u8; 8]).addr();
-        assert_eq!((rf as *const u64).addr(), buf_addr);
+        assert_eq!(core::ptr::addr_of!(*rf).cast(), buf_ptr);
 
         let r = Ref::<_, u64>::from_bytes(&mut buf.t[..]).unwrap();
         let rf = Ref::into_mut(r);
         assert_eq!(rf, &mut 0u64);
-        assert_eq!((rf as *mut u64).addr(), buf_addr);
+        assert_eq!(core::ptr::addr_of!(*rf).cast(), buf_ptr);
 
         *rf = u64::MAX;
         assert_eq!(buf.t, [0xFF; 8]);

src/wrappers.rs

@@ -995,7 +995,7 @@ mod tests {
             let uninit = MaybeUninit::new(&input);
             // SAFETY: `uninit` is in an initialized state
             let output = unsafe { uninit.assume_init() };
-            assert_eq!(&input as *const _, output as *const _);
+            assert!(core::ptr::eq(&input, output));
             assert_eq!(input, *output);
         }
 
@@ -1005,7 +1005,7 @@ mod tests {
             let uninit = MaybeUninit::new(&input[..]);
             // SAFETY: `uninit` is in an initialized state
             let output = unsafe { uninit.assume_init() };
-            assert_eq!(&input[..] as *const _, output as *const _);
+            assert!(core::ptr::eq(&input[..], output));
             assert_eq!(input, *output);
         }
     }