diff --git a/library/core/src/clone.rs b/library/core/src/clone.rs
index 9875ef020473..9df39d7b5420 100644
--- a/library/core/src/clone.rs
+++ b/library/core/src/clone.rs
@@ -282,6 +282,7 @@ unsafe impl<T: Clone> CloneToUninit for T {
 
 // Specialized implementation for types that are [`Copy`], not just [`Clone`],
 // and can therefore be copied bitwise.
+#[doc(hidden)]
 #[unstable(feature = "clone_to_uninit", issue = "126799")]
 unsafe impl<T: Copy> CloneToUninit for T {
     unsafe fn clone_to_uninit(&self, dst: *mut Self) {
@@ -296,6 +297,7 @@ unsafe impl<T: Copy> CloneToUninit for T {
 #[unstable(feature = "clone_to_uninit", issue = "126799")]
 unsafe impl<T: Clone> CloneToUninit for [T] {
     #[cfg_attr(debug_assertions, track_caller)]
+    #[inline]
     default unsafe fn clone_to_uninit(&self, dst: *mut Self) {
         let len = self.len();
         // This is the most likely mistake to make, so check it as a debug assertion.
@@ -323,9 +325,11 @@ unsafe impl<T: Clone> CloneToUninit for [T] {
     }
 }
 
+#[doc(hidden)]
 #[unstable(feature = "clone_to_uninit", issue = "126799")]
 unsafe impl<T: Copy> CloneToUninit for [T] {
     #[cfg_attr(debug_assertions, track_caller)]
+    #[inline]
     unsafe fn clone_to_uninit(&self, dst: *mut Self) {
         let len = self.len();
         // This is the most likely mistake to make, so check it as a debug assertion.
@@ -346,6 +350,7 @@ unsafe impl<T: Copy> CloneToUninit for [T] {
 #[unstable(feature = "clone_to_uninit", issue = "126799")]
 unsafe impl CloneToUninit for str {
     #[cfg_attr(debug_assertions, track_caller)]
+    #[inline]
     unsafe fn clone_to_uninit(&self, dst: *mut Self) {
         // SAFETY: str is just a [u8] with UTF-8 invariant
         unsafe { self.as_bytes().clone_to_uninit(dst as *mut [u8]) }
diff --git a/library/std/src/ffi/os_str.rs b/library/std/src/ffi/os_str.rs
index 21f21d0c034b..b145fca58a90 100644
--- a/library/std/src/ffi/os_str.rs
+++ b/library/std/src/ffi/os_str.rs
@@ -1262,6 +1262,7 @@ impl Clone for Box<OsStr> {
 #[unstable(feature = "clone_to_uninit", issue = "126799")]
 unsafe impl CloneToUninit for OsStr {
     #[cfg_attr(debug_assertions, track_caller)]
+    #[inline]
     unsafe fn clone_to_uninit(&self, dst: *mut Self) {
         // SAFETY: we're just a wrapper around a platform-specific Slice
         unsafe { self.inner.clone_to_uninit(addr_of_mut!((*dst).inner)) }
diff --git a/library/std/src/path.rs b/library/std/src/path.rs
index eb111fd6b283..aa9b800f08a4 100644
--- a/library/std/src/path.rs
+++ b/library/std/src/path.rs
@@ -3032,6 +3032,7 @@ impl Path {
 #[unstable(feature = "clone_to_uninit", issue = "126799")]
 unsafe impl CloneToUninit for Path {
     #[cfg_attr(debug_assertions, track_caller)]
+    #[inline]
     unsafe fn clone_to_uninit(&self, dst: *mut Self) {
         // SAFETY: Path is just a wrapper around OsStr
         unsafe { self.inner.clone_to_uninit(core::ptr::addr_of_mut!((*dst).inner)) }
diff --git a/library/std/src/sys/os_str/bytes.rs b/library/std/src/sys/os_str/bytes.rs
index 339366e16a61..2907616f98cc 100644
--- a/library/std/src/sys/os_str/bytes.rs
+++ b/library/std/src/sys/os_str/bytes.rs
@@ -344,6 +344,7 @@ impl Slice {
 #[unstable(feature = "clone_to_uninit", issue = "126799")]
 unsafe impl CloneToUninit for Slice {
     #[cfg_attr(debug_assertions, track_caller)]
+    #[inline]
     unsafe fn clone_to_uninit(&self, dst: *mut Self) {
         // SAFETY: we're just a wrapper around [u8]
         unsafe { self.inner.clone_to_uninit(addr_of_mut!((*dst).inner)) }
diff --git a/library/std/src/sys/os_str/wtf8.rs b/library/std/src/sys/os_str/wtf8.rs
index abe7c855a06a..a56edeb5be15 100644
--- a/library/std/src/sys/os_str/wtf8.rs
+++ b/library/std/src/sys/os_str/wtf8.rs
@@ -266,6 +266,7 @@ impl Slice {
 #[unstable(feature = "clone_to_uninit", issue = "126799")]
 unsafe impl CloneToUninit for Slice {
     #[cfg_attr(debug_assertions, track_caller)]
+    #[inline]
     unsafe fn clone_to_uninit(&self, dst: *mut Self) {
         // SAFETY: we're just a wrapper around Wtf8
         unsafe { self.inner.clone_to_uninit(addr_of_mut!((*dst).inner)) }
diff --git a/library/std/src/sys_common/wtf8.rs b/library/std/src/sys_common/wtf8.rs
index 1ed94035d996..a0ea44c5a239 100644
--- a/library/std/src/sys_common/wtf8.rs
+++ b/library/std/src/sys_common/wtf8.rs
@@ -1050,6 +1050,7 @@ impl Hash for Wtf8 {
 #[unstable(feature = "clone_to_uninit", issue = "126799")]
 unsafe impl CloneToUninit for Wtf8 {
     #[cfg_attr(debug_assertions, track_caller)]
+    #[inline]
     unsafe fn clone_to_uninit(&self, dst: *mut Self) {
         // SAFETY: we're just a wrapper around [u8]
         unsafe { self.bytes.clone_to_uninit(addr_of_mut!((*dst).bytes)) }