diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs
index 9951d8f4fc153..02505457efa4d 100644
--- a/compiler/rustc_span/src/symbol.rs
+++ b/compiler/rustc_span/src/symbol.rs
@@ -1583,6 +1583,7 @@ symbols! {
         unrestricted_attribute_tokens,
         unsafe_block_in_unsafe_fn,
         unsafe_cell,
+        unsafe_cell_from_mut,
         unsafe_no_drop_flag,
         unsafe_pin_internals,
         unsize,
diff --git a/library/backtrace b/library/backtrace
index 4245978ca8169..07872f28cd8a6 160000
--- a/library/backtrace
+++ b/library/backtrace
@@ -1 +1 @@
-Subproject commit 4245978ca8169c40c088ff733825e4527f7b914c
+Subproject commit 07872f28cd8a65c3c7428811548dc85f1f2fb05b
diff --git a/library/core/src/cell.rs b/library/core/src/cell.rs
index 2c3c14853a44b..744767aae44ca 100644
--- a/library/core/src/cell.rs
+++ b/library/core/src/cell.rs
@@ -2030,6 +2030,27 @@ impl<T> UnsafeCell<T> {
 }
 
 impl<T: ?Sized> UnsafeCell<T> {
+    /// Converts from `&mut T` to `&mut UnsafeCell<T>`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # #![feature(unsafe_cell_from_mut)]
+    /// use std::cell::UnsafeCell;
+    ///
+    /// let mut val = 42;
+    /// let uc = UnsafeCell::from_mut(&mut val);
+    ///
+    /// *uc.get_mut() -= 1;
+    /// assert_eq!(*uc.get_mut(), 41);
+    /// ```
+    #[inline(always)]
+    #[unstable(feature = "unsafe_cell_from_mut", issue = "111645")]
+    pub const fn from_mut(value: &mut T) -> &mut UnsafeCell<T> {
+        // SAFETY: `UnsafeCell<T>` has the same memory layout as `T` due to #[repr(transparent)].
+        unsafe { &mut *(value as *mut T as *mut UnsafeCell<T>) }
+    }
+
     /// Gets a mutable pointer to the wrapped value.
     ///
     /// This can be cast to a pointer of any kind.
diff --git a/library/stdarch b/library/stdarch
index 7e2cdc675b921..b655243782c18 160000
--- a/library/stdarch
+++ b/library/stdarch
@@ -1 +1 @@
-Subproject commit 7e2cdc675b92165c5f8c4c794620252be4605e74
+Subproject commit b655243782c18d3419439daa523782e0818ecf26
diff --git a/src/doc/book b/src/doc/book
index 8fa6b854d5155..0510ca84c2ce6 160000
--- a/src/doc/book
+++ b/src/doc/book
@@ -1 +1 @@
-Subproject commit 8fa6b854d515506d825390fe0d817f5ef0c89350
+Subproject commit 0510ca84c2ce6bf93c4ccf9248756e9e4fd00b12
diff --git a/src/doc/edition-guide b/src/doc/edition-guide
index f63e578b92ff4..6038be9d37d72 160000
--- a/src/doc/edition-guide
+++ b/src/doc/edition-guide
@@ -1 +1 @@
-Subproject commit f63e578b92ff43e8cc38fcaa257b660f45c8a8c2
+Subproject commit 6038be9d37d7251c966b486154af621d1794d7af
diff --git a/src/doc/embedded-book b/src/doc/embedded-book
index d9eb4c3f75435..701d1551429da 160000
--- a/src/doc/embedded-book
+++ b/src/doc/embedded-book
@@ -1 +1 @@
-Subproject commit d9eb4c3f75435b008881062ffa77bf0d1527b37d
+Subproject commit 701d1551429da4cb609082c0ac99df569e336710
diff --git a/src/doc/reference b/src/doc/reference
index 28dc0f3576b55..3c47807a3131b 160000
--- a/src/doc/reference
+++ b/src/doc/reference
@@ -1 +1 @@
-Subproject commit 28dc0f3576b55f5e57c5d6e65cd68ba3161e9fd5
+Subproject commit 3c47807a3131b3c7cacb508f52632078d253cd0a
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
index 8ee9528b72b92..ba84bf35d0f17 160000
--- a/src/doc/rust-by-example
+++ b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit 8ee9528b72b927cff8fd32346db8bbd1198816f0
+Subproject commit ba84bf35d0f17d404003349309201654d25f61af
diff --git a/src/doc/rustc-dev-guide b/src/doc/rustc-dev-guide
index 28dbeaf5c44bc..fca8af6c154c6 160000
--- a/src/doc/rustc-dev-guide
+++ b/src/doc/rustc-dev-guide
@@ -1 +1 @@
-Subproject commit 28dbeaf5c44bc7f5111ad412e99f2d7c5cec6c90
+Subproject commit fca8af6c154c6cde2512f1331cf2704f214a818e
diff --git a/src/llvm-project b/src/llvm-project
index ea6fa9c2d43aa..2b9c52f66815b 160000
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit ea6fa9c2d43aaf0f11559719eda9b54d356d5416
+Subproject commit 2b9c52f66815bb8d6ea74a4b26df3410602be9b0
diff --git a/src/tools/cargo b/src/tools/cargo
index 13413c64ff88d..0e474cfd7b16b 160000
--- a/src/tools/cargo
+++ b/src/tools/cargo
@@ -1 +1 @@
-Subproject commit 13413c64ff88dd6c2824e9eb9374fc5f10895d28
+Subproject commit 0e474cfd7b16b018cf46e95da3f6a5b2f1f6a9e7