diff --git a/src/cfgs.rs b/src/cfgs.rs
index 6dc6c47e..6722b980 100644
--- a/src/cfgs.rs
+++ b/src/cfgs.rs
@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: Apache-2.0 OR MIT
 
+#![allow(missing_docs)]
+
 #[cfg(not(all(
     portable_atomic_no_atomic_load_store,
     not(any(
@@ -12,20 +14,26 @@
 )))]
 #[macro_use]
 mod atomic_8_16_macros {
-    #[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
     #[macro_export]
     macro_rules! cfg_has_atomic_8 {
         ($($tt:tt)*) => {
             $($tt)*
         };
     }
-    #[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
+    #[macro_export]
+    macro_rules! cfg_no_atomic_8 {
+        ($($tt:tt)*) => {};
+    }
     #[macro_export]
     macro_rules! cfg_has_atomic_16 {
         ($($tt:tt)*) => {
             $($tt)*
         };
     }
+    #[macro_export]
+    macro_rules! cfg_no_atomic_16 {
+        ($($tt:tt)*) => {};
+    }
 }
 #[cfg(all(
     portable_atomic_no_atomic_load_store,
@@ -39,16 +47,26 @@ mod atomic_8_16_macros {
 ))]
 #[macro_use]
 mod atomic_8_16_macros {
-    #[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
     #[macro_export]
     macro_rules! cfg_has_atomic_8 {
         ($($tt:tt)*) => {};
     }
-    #[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
+    #[macro_export]
+    macro_rules! cfg_no_atomic_8 {
+        ($($tt:tt)*) => {
+            $($tt)*
+        };
+    }
     #[macro_export]
     macro_rules! cfg_has_atomic_16 {
         ($($tt:tt)*) => {};
     }
+    #[macro_export]
+    macro_rules! cfg_no_atomic_16 {
+        ($($tt:tt)*) => {
+            $($tt)*
+        };
+    }
 }
 
 #[cfg(all(
@@ -66,13 +84,16 @@ mod atomic_8_16_macros {
 ))]
 #[macro_use]
 mod atomic_32_macros {
-    #[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
     #[macro_export]
     macro_rules! cfg_has_atomic_32 {
         ($($tt:tt)*) => {
             $($tt)*
         };
     }
+    #[macro_export]
+    macro_rules! cfg_no_atomic_32 {
+        ($($tt:tt)*) => {};
+    }
 }
 #[cfg(not(all(
     any(not(target_pointer_width = "16"), feature = "fallback"),
@@ -89,11 +110,16 @@ mod atomic_32_macros {
 )))]
 #[macro_use]
 mod atomic_32_macros {
-    #[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
     #[macro_export]
     macro_rules! cfg_has_atomic_32 {
         ($($tt:tt)*) => {};
     }
+    #[macro_export]
+    macro_rules! cfg_no_atomic_32 {
+        ($($tt:tt)*) => {
+            $($tt)*
+        };
+    }
 }
 
 #[cfg_attr(
@@ -132,13 +158,16 @@ mod atomic_32_macros {
 )]
 #[macro_use]
 mod atomic_64_macros {
-    #[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
     #[macro_export]
     macro_rules! cfg_has_atomic_64 {
         ($($tt:tt)*) => {
             $($tt)*
         };
     }
+    #[macro_export]
+    macro_rules! cfg_no_atomic_64 {
+        ($($tt:tt)*) => {};
+    }
 }
 #[cfg_attr(
     portable_atomic_no_cfg_target_has_atomic,
@@ -176,11 +205,16 @@ mod atomic_64_macros {
 )]
 #[macro_use]
 mod atomic_64_macros {
-    #[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
     #[macro_export]
     macro_rules! cfg_has_atomic_64 {
         ($($tt:tt)*) => {};
     }
+    #[macro_export]
+    macro_rules! cfg_no_atomic_64 {
+        ($($tt:tt)*) => {
+            $($tt)*
+        };
+    }
 }
 
 #[cfg_attr(
@@ -258,13 +292,16 @@ mod atomic_64_macros {
 )]
 #[macro_use]
 mod atomic_128_macros {
-    #[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
     #[macro_export]
     macro_rules! cfg_has_atomic_128 {
         ($($tt:tt)*) => {
             $($tt)*
         };
     }
+    #[macro_export]
+    macro_rules! cfg_no_atomic_128 {
+        ($($tt:tt)*) => {};
+    }
 }
 #[cfg_attr(
     not(feature = "fallback"),
@@ -341,11 +378,16 @@ mod atomic_128_macros {
 )]
 #[macro_use]
 mod atomic_128_macros {
-    #[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
     #[macro_export]
     macro_rules! cfg_has_atomic_128 {
         ($($tt:tt)*) => {};
     }
+    #[macro_export]
+    macro_rules! cfg_no_atomic_128 {
+        ($($tt:tt)*) => {
+            $($tt)*
+        };
+    }
 }
 
 #[cfg_attr(
@@ -370,13 +412,16 @@ mod atomic_128_macros {
 )]
 #[macro_use]
 mod atomic_cas_macros {
-    #[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
     #[macro_export]
     macro_rules! cfg_has_atomic_cas {
         ($($tt:tt)*) => {
             $($tt)*
         };
     }
+    #[macro_export]
+    macro_rules! cfg_no_atomic_cas {
+        ($($tt:tt)*) => {};
+    }
 }
 #[cfg_attr(
     portable_atomic_no_cfg_target_has_atomic,
@@ -400,9 +445,37 @@ mod atomic_cas_macros {
 )]
 #[macro_use]
 mod atomic_cas_macros {
-    #[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
     #[macro_export]
     macro_rules! cfg_has_atomic_cas {
         ($($tt:tt)*) => {};
     }
+    #[macro_export]
+    macro_rules! cfg_no_atomic_cas {
+        ($($tt:tt)*) => {
+            $($tt)*
+        };
+    }
+}
+
+// Check that all cfg_ macros work.
+mod check {
+    crate::cfg_has_atomic_8! { type _Atomic8 = (); }
+    crate::cfg_no_atomic_8! { type _Atomic8 = (); }
+    crate::cfg_has_atomic_16! { type _Atomic16 = (); }
+    crate::cfg_no_atomic_16! { type _Atomic16 = (); }
+    crate::cfg_has_atomic_32! { type _Atomic32 = (); }
+    crate::cfg_no_atomic_32! { type _Atomic32 = (); }
+    crate::cfg_has_atomic_64! { type _Atomic64 = (); }
+    crate::cfg_no_atomic_64! { type _Atomic64 = (); }
+    crate::cfg_has_atomic_128! { type _Atomic128 = (); }
+    crate::cfg_no_atomic_128! { type _Atomic128 = (); }
+    crate::cfg_has_atomic_ptr! { type _AtomicPtr = (); }
+    crate::cfg_no_atomic_ptr! { type _AtomicPtr = (); }
+    crate::cfg_has_atomic_cas! { type __AtomicPtr = (); }
+    crate::cfg_no_atomic_cas! { type __AtomicPtr = (); }
+    #[allow(unused_imports)]
+    use {
+        _Atomic128 as _, _Atomic16 as _, _Atomic32 as _, _Atomic64 as _, _Atomic8 as _,
+        _AtomicPtr as _, __AtomicPtr as _,
+    };
 }
diff --git a/src/lib.rs b/src/lib.rs
index 3268ba1a..b13aca83 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -200,7 +200,7 @@ RUSTFLAGS="--cfg portable_atomic_no_outline_atomics" cargo ...
 #![warn(
     // Lints that may help when writing public library.
     missing_debug_implementations,
-    missing_docs,
+    // missing_docs,
     clippy::alloc_instead_of_core,
     clippy::exhaustive_enums,
     clippy::exhaustive_structs,
@@ -209,6 +209,7 @@ RUSTFLAGS="--cfg portable_atomic_no_outline_atomics" cargo ...
     clippy::std_instead_of_alloc,
     clippy::std_instead_of_core,
 )]
+#![cfg_attr(not(portable_atomic_no_asm), warn(missing_docs))] // module-level #![allow(missing_docs)] doesn't work for macros on old rustc
 #![allow(
     clippy::cast_lossless,
     clippy::inline_always,
@@ -441,18 +442,14 @@ extern crate std;
 
 #[macro_use]
 mod cfgs;
-#[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
 #[cfg(target_pointer_width = "128")]
-pub use cfg_has_atomic_128 as cfg_has_atomic_ptr;
-#[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
+pub use {cfg_has_atomic_128 as cfg_has_atomic_ptr, cfg_no_atomic_128 as cfg_no_atomic_ptr};
 #[cfg(target_pointer_width = "16")]
-pub use cfg_has_atomic_16 as cfg_has_atomic_ptr;
-#[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
+pub use {cfg_has_atomic_16 as cfg_has_atomic_ptr, cfg_no_atomic_16 as cfg_no_atomic_ptr};
 #[cfg(target_pointer_width = "32")]
-pub use cfg_has_atomic_32 as cfg_has_atomic_ptr;
-#[doc(hidden)] // Not public API. (please submit an issue if you want this to be public API)
+pub use {cfg_has_atomic_32 as cfg_has_atomic_ptr, cfg_no_atomic_32 as cfg_no_atomic_ptr};
 #[cfg(target_pointer_width = "64")]
-pub use cfg_has_atomic_64 as cfg_has_atomic_ptr;
+pub use {cfg_has_atomic_64 as cfg_has_atomic_ptr, cfg_no_atomic_64 as cfg_no_atomic_ptr};
 
 #[macro_use]
 mod utils;