fix warnings

Author: japaric

src/lib.rs

@@ -73,8 +73,7 @@
 #![deny(missing_docs)]
 #![deny(rust_2018_compatibility)]
 #![deny(rust_2018_idioms)]
-// #![deny(warnings)]
-#![allow(warnings)] // FIXME
+#![deny(warnings)]
 
 pub use binary_heap::BinaryHeap;
 pub use generic_array::typenum::consts;

src/pool/cas.rs

@@ -7,7 +7,7 @@ use core::{
     cell::UnsafeCell,
     convert::TryFrom,
     marker::PhantomData,
-    mem::{self, MaybeUninit},
+    mem,
     num::NonZeroUsize,
     ptr::NonNull,
     sync::atomic::{AtomicUsize, Ordering},

src/pool/llsc.rs

@@ -4,9 +4,11 @@ pub use core::ptr::NonNull as Ptr;
 use core::{
     cell::UnsafeCell,
     ptr,
-    sync::atomic::{self, AtomicPtr, Ordering},
+    sync::atomic::{AtomicPtr, Ordering},
 };
 
+/// Unfortunate implementation detail required to use the
+/// [`Pool.grow_exact`](struct.Pool.html#method.grow_exact) method
 pub struct Node<T> {
     next: AtomicPtr<Node<T>>,
     pub(crate) data: UnsafeCell<T>,

src/pool/mod.rs

@@ -224,16 +224,14 @@
 //!
 //! 4. "Hazard pointers: Safe memory reclamation for lock-free objects." Michael, Maged M.
 
-use core::{any::TypeId, mem, sync::atomic::Ordering};
+use core::{any::TypeId, mem};
 use core::{
-    cell::UnsafeCell,
     cmp, fmt,
     hash::{Hash, Hasher},
     marker::PhantomData,
     mem::MaybeUninit,
     ops::{Deref, DerefMut},
     ptr,
-    sync::atomic::AtomicPtr,
 };
 
 use as_slice::{AsMutSlice, AsSlice};
@@ -394,7 +392,7 @@ impl<T> Pool<T> {
                 }
 
                 #[cfg(not(target_arch = "x86_64"))]
-                () => self.stack.push(NonNull::from(p)),
+                () => self.stack.push(core::ptr::NonNull::from(p)),
             }
         }
         cap