diff --git a/compiler/rustc_middle/src/dep_graph/mod.rs b/compiler/rustc_middle/src/dep_graph/mod.rs
index 76ef62f9f2728..dc0da165af67d 100644
--- a/compiler/rustc_middle/src/dep_graph/mod.rs
+++ b/compiler/rustc_middle/src/dep_graph/mod.rs
@@ -8,8 +8,8 @@ mod dep_node;
 
 pub use rustc_query_system::dep_graph::debug::EdgeFilter;
 pub use rustc_query_system::dep_graph::{
-    debug::DepNodeFilter, hash_result, DepContext, DepGraphQuery, DepNodeColor, DepNodeIndex, Deps,
-    SerializedDepGraph, SerializedDepNodeIndex, TaskDeps, TaskDepsRef, WorkProduct, WorkProductId,
+    debug::DepNodeFilter, hash_result, DepContext, DepGraphQuery, DepNodeIndex, Deps,
+    SerializedDepGraph, SerializedDepNodeIndex, TaskDepsRef, WorkProduct, WorkProductId,
     WorkProductMap,
 };
 
diff --git a/compiler/rustc_query_system/src/dep_graph/edges.rs b/compiler/rustc_query_system/src/dep_graph/edges.rs
index 6ba3924f65eb0..400f128d5833b 100644
--- a/compiler/rustc_query_system/src/dep_graph/edges.rs
+++ b/compiler/rustc_query_system/src/dep_graph/edges.rs
@@ -5,7 +5,7 @@ use std::iter::Extend;
 use std::ops::Deref;
 
 #[derive(Default, Debug)]
-pub struct EdgesVec {
+pub(crate) struct EdgesVec {
     max: u32,
     edges: SmallVec<[DepNodeIndex; EdgesVec::INLINE_CAPACITY]>,
 }
@@ -18,21 +18,21 @@ impl Hash for EdgesVec {
 }
 
 impl EdgesVec {
-    pub const INLINE_CAPACITY: usize = 8;
+    pub(crate) const INLINE_CAPACITY: usize = 8;
 
     #[inline]
-    pub fn new() -> Self {
+    pub(crate) fn new() -> Self {
         Self::default()
     }
 
     #[inline]
-    pub fn push(&mut self, edge: DepNodeIndex) {
+    pub(crate) fn push(&mut self, edge: DepNodeIndex) {
         self.max = self.max.max(edge.as_u32());
         self.edges.push(edge);
     }
 
     #[inline]
-    pub fn max_index(&self) -> u32 {
+    pub(crate) fn max_index(&self) -> u32 {
         self.max
     }
 }
diff --git a/compiler/rustc_query_system/src/dep_graph/graph.rs b/compiler/rustc_query_system/src/dep_graph/graph.rs
index 6cace01955e75..831062b1678f4 100644
--- a/compiler/rustc_query_system/src/dep_graph/graph.rs
+++ b/compiler/rustc_query_system/src/dep_graph/graph.rs
@@ -18,7 +18,7 @@ use std::sync::atomic::Ordering::Relaxed;
 use super::query::DepGraphQuery;
 use super::serialized::{GraphEncoder, SerializedDepGraph, SerializedDepNodeIndex};
 use super::{DepContext, DepKind, DepNode, Deps, HasDepContext, WorkProductId};
-use crate::dep_graph::EdgesVec;
+use crate::dep_graph::edges::EdgesVec;
 use crate::ich::StableHashingContext;
 use crate::query::{QueryContext, QuerySideEffects};
 
@@ -41,8 +41,7 @@ rustc_index::newtype_index! {
 }
 
 impl DepNodeIndex {
-    pub const INVALID: DepNodeIndex = DepNodeIndex::MAX;
-    pub const SINGLETON_DEPENDENCYLESS_ANON_NODE: DepNodeIndex = DepNodeIndex::from_u32(0);
+    const SINGLETON_DEPENDENCYLESS_ANON_NODE: DepNodeIndex = DepNodeIndex::from_u32(0);
     pub const FOREVER_RED_NODE: DepNodeIndex = DepNodeIndex::from_u32(1);
 }
 
@@ -53,20 +52,20 @@ impl From<DepNodeIndex> for QueryInvocationId {
     }
 }
 
-pub struct MarkFrame<'a> {
+pub(crate) struct MarkFrame<'a> {
     index: SerializedDepNodeIndex,
     parent: Option<&'a MarkFrame<'a>>,
 }
 
 #[derive(PartialEq)]
-pub enum DepNodeColor {
+enum DepNodeColor {
     Red,
     Green(DepNodeIndex),
 }
 
 impl DepNodeColor {
     #[inline]
-    pub fn is_green(self) -> bool {
+    fn is_green(self) -> bool {
         match self {
             DepNodeColor::Red => false,
             DepNodeColor::Green(_) => true,
@@ -74,7 +73,7 @@ impl DepNodeColor {
     }
 }
 
-pub struct DepGraphData<D: Deps> {
+pub(crate) struct DepGraphData<D: Deps> {
     /// The new encoding of the dependency graph, optimized for red/green
     /// tracking. The `current` field is the dependency graph of only the
     /// current compilation session: We don't merge the previous dep-graph into
@@ -185,7 +184,7 @@ impl<D: Deps> DepGraph<D> {
     }
 
     #[inline]
-    pub fn data(&self) -> Option<&DepGraphData<D>> {
+    pub(crate) fn data(&self) -> Option<&DepGraphData<D>> {
         self.data.as_deref()
     }
 
@@ -333,7 +332,7 @@ impl<D: Deps> DepGraphData<D> {
     ///
     /// [rustc dev guide]: https://rustc-dev-guide.rust-lang.org/queries/incremental-compilation.html
     #[inline(always)]
-    pub fn with_task<Ctxt: HasDepContext<Deps = D>, A: Debug, R>(
+    pub(crate) fn with_task<Ctxt: HasDepContext<Deps = D>, A: Debug, R>(
         &self,
         key: DepNode,
         cx: Ctxt,
@@ -398,7 +397,7 @@ impl<D: Deps> DepGraphData<D> {
 
     /// Executes something within an "anonymous" task, that is, a task the
     /// `DepNode` of which is determined by the list of inputs it read from.
-    pub fn with_anon_task<Tcx: DepContext<Deps = D>, OP, R>(
+    pub(crate) fn with_anon_task<Tcx: DepContext<Deps = D>, OP, R>(
         &self,
         cx: Tcx,
         dep_kind: DepKind,
@@ -618,7 +617,7 @@ impl<D: Deps> DepGraph<D> {
 
 impl<D: Deps> DepGraphData<D> {
     #[inline]
-    pub fn dep_node_index_of_opt(&self, dep_node: &DepNode) -> Option<DepNodeIndex> {
+    fn dep_node_index_of_opt(&self, dep_node: &DepNode) -> Option<DepNodeIndex> {
         if let Some(prev_index) = self.previous.node_to_index_opt(dep_node) {
             self.current.prev_index_to_index.lock()[prev_index]
         } else {
@@ -627,7 +626,7 @@ impl<D: Deps> DepGraphData<D> {
     }
 
     #[inline]
-    pub fn dep_node_exists(&self, dep_node: &DepNode) -> bool {
+    fn dep_node_exists(&self, dep_node: &DepNode) -> bool {
         self.dep_node_index_of_opt(dep_node).is_some()
     }
 
@@ -643,21 +642,21 @@ impl<D: Deps> DepGraphData<D> {
     /// Returns true if the given node has been marked as green during the
     /// current compilation session. Used in various assertions
     #[inline]
-    pub fn is_index_green(&self, prev_index: SerializedDepNodeIndex) -> bool {
+    pub(crate) fn is_index_green(&self, prev_index: SerializedDepNodeIndex) -> bool {
         self.colors.get(prev_index).is_some_and(|c| c.is_green())
     }
 
     #[inline]
-    pub fn prev_fingerprint_of(&self, prev_index: SerializedDepNodeIndex) -> Fingerprint {
+    pub(crate) fn prev_fingerprint_of(&self, prev_index: SerializedDepNodeIndex) -> Fingerprint {
         self.previous.fingerprint_by_index(prev_index)
     }
 
     #[inline]
-    pub fn prev_node_of(&self, prev_index: SerializedDepNodeIndex) -> DepNode {
+    pub(crate) fn prev_node_of(&self, prev_index: SerializedDepNodeIndex) -> DepNode {
         self.previous.index_to_node(prev_index)
     }
 
-    pub fn mark_debug_loaded_from_disk(&self, dep_node: DepNode) {
+    pub(crate) fn mark_debug_loaded_from_disk(&self, dep_node: DepNode) {
         self.debug_loaded_from_disk.lock().insert(dep_node);
     }
 }
@@ -684,8 +683,9 @@ impl<D: Deps> DepGraph<D> {
         self.data.as_ref().unwrap().debug_loaded_from_disk.lock().contains(&dep_node)
     }
 
+    #[cfg(debug_assertions)]
     #[inline(always)]
-    pub fn register_dep_node_debug_str<F>(&self, dep_node: DepNode, debug_str_gen: F)
+    pub(crate) fn register_dep_node_debug_str<F>(&self, dep_node: DepNode, debug_str_gen: F)
     where
         F: FnOnce() -> String,
     {
@@ -725,7 +725,7 @@ impl<D: Deps> DepGraphData<D> {
     /// A node will have an index, when it's already been marked green, or when we can mark it
     /// green. This function will mark the current task as a reader of the specified node, when
     /// a node index can be found for that node.
-    pub fn try_mark_green<Qcx: QueryContext<Deps = D>>(
+    pub(crate) fn try_mark_green<Qcx: QueryContext<Deps = D>>(
         &self,
         qcx: Qcx,
         dep_node: &DepNode,
diff --git a/compiler/rustc_query_system/src/dep_graph/mod.rs b/compiler/rustc_query_system/src/dep_graph/mod.rs
index 624ae680a8ff7..feb69ecd07867 100644
--- a/compiler/rustc_query_system/src/dep_graph/mod.rs
+++ b/compiler/rustc_query_system/src/dep_graph/mod.rs
@@ -6,11 +6,8 @@ mod query;
 mod serialized;
 
 pub use dep_node::{DepKind, DepKindStruct, DepNode, DepNodeParams, WorkProductId};
-pub use edges::EdgesVec;
-pub use graph::{
-    hash_result, DepGraph, DepGraphData, DepNodeColor, DepNodeIndex, TaskDeps, TaskDepsRef,
-    WorkProduct, WorkProductMap,
-};
+pub(crate) use graph::DepGraphData;
+pub use graph::{hash_result, DepGraph, DepNodeIndex, TaskDepsRef, WorkProduct, WorkProductMap};
 pub use query::DepGraphQuery;
 pub use serialized::{SerializedDepGraph, SerializedDepNodeIndex};
 
diff --git a/compiler/rustc_query_system/src/dep_graph/serialized.rs b/compiler/rustc_query_system/src/dep_graph/serialized.rs
index fcf46be6e6f5a..e97ef8072045d 100644
--- a/compiler/rustc_query_system/src/dep_graph/serialized.rs
+++ b/compiler/rustc_query_system/src/dep_graph/serialized.rs
@@ -37,7 +37,7 @@
 
 use super::query::DepGraphQuery;
 use super::{DepKind, DepNode, DepNodeIndex, Deps};
-use crate::dep_graph::EdgesVec;
+use crate::dep_graph::edges::EdgesVec;
 use rustc_data_structures::fingerprint::Fingerprint;
 use rustc_data_structures::fingerprint::PackedFingerprint;
 use rustc_data_structures::fx::FxHashMap;
diff --git a/compiler/rustc_query_system/src/ich/hcx.rs b/compiler/rustc_query_system/src/ich/hcx.rs
index 5593a15412fb7..eec0433ae68d2 100644
--- a/compiler/rustc_query_system/src/ich/hcx.rs
+++ b/compiler/rustc_query_system/src/ich/hcx.rs
@@ -28,7 +28,7 @@ pub struct StableHashingContext<'a> {
     // `CachingSourceMapView`, so we initialize it lazily.
     raw_source_map: &'a SourceMap,
     caching_source_map: Option<CachingSourceMapView<'a>>,
-    pub(super) hashing_controls: HashingControls,
+    hashing_controls: HashingControls,
 }
 
 /// The `BodyResolver` allows mapping a `BodyId` to the corresponding `hir::Body`.
diff --git a/compiler/rustc_query_system/src/lib.rs b/compiler/rustc_query_system/src/lib.rs
index 1944ac443eaed..2ed420f356439 100644
--- a/compiler/rustc_query_system/src/lib.rs
+++ b/compiler/rustc_query_system/src/lib.rs
@@ -2,9 +2,7 @@
 #![feature(core_intrinsics)]
 #![feature(hash_raw_entry)]
 #![feature(min_specialization)]
-#![feature(extern_types)]
 #![feature(let_chains)]
-#![feature(inline_const)]
 #![allow(rustc::potential_query_instability)]
 #![deny(rustc::untranslatable_diagnostic)]
 #![deny(rustc::diagnostic_outside_of_impl)]