diff --git a/wgpu-core/src/hub.rs b/wgpu-core/src/hub.rs
index 091e7856650..d5dc0c364cc 100644
--- a/wgpu-core/src/hub.rs
+++ b/wgpu-core/src/hub.rs
@@ -438,7 +438,7 @@ pub trait IdentityHandler<I>: Debug {
 }
 
 impl<I: id::TypedId + Debug> IdentityHandler<I> for Mutex<IdentityManager> {
-    type Input = PhantomData<I>;
+    type Input = ();
     fn process(&self, _id: Self::Input, backend: Backend) -> I {
         self.lock().alloc(backend)
     }
diff --git a/wgpu/src/backend/direct.rs b/wgpu/src/backend/direct.rs
index 870d03d106a..3166f0fc047 100644
--- a/wgpu/src/backend/direct.rs
+++ b/wgpu/src/backend/direct.rs
@@ -15,7 +15,6 @@ use std::{
     error::Error,
     fmt,
     future::{ready, Ready},
-    marker::PhantomData,
     ops::Range,
     slice,
     sync::Arc,
@@ -69,9 +68,7 @@ impl Context {
     #[cfg(any(not(target_arch = "wasm32"), feature = "emscripten"))]
     pub fn enumerate_adapters(&self, backends: wgt::Backends) -> Vec<wgc::id::AdapterId> {
         self.0
-            .enumerate_adapters(wgc::instance::AdapterInputs::Mask(backends, |_| {
-                PhantomData
-            }))
+            .enumerate_adapters(wgc::instance::AdapterInputs::Mask(backends, |_| ()))
     }
 
     #[cfg(any(not(target_arch = "wasm32"), feature = "emscripten"))]
@@ -79,7 +76,7 @@ impl Context {
         &self,
         hal_adapter: hal::ExposedAdapter<A>,
     ) -> wgc::id::AdapterId {
-        self.0.create_adapter_from_hal(hal_adapter, PhantomData)
+        self.0.create_adapter_from_hal(hal_adapter, ())
     }
 
     pub unsafe fn adapter_as_hal<A: wgc::hub::HalApi, F: FnOnce(Option<&A::Adapter>) -> R, R>(
@@ -105,7 +102,7 @@ impl Context {
             hal_device,
             &desc.map_label(|l| l.map(Borrowed)),
             trace_dir,
-            PhantomData,
+            (),
         );
         if let Some(err) = error {
             self.handle_error_fatal(err, "Adapter::create_device_from_hal");
@@ -130,7 +127,7 @@ impl Context {
             hal_texture,
             device.id,
             &desc.map_label(|l| l.map(Borrowed)),
-            PhantomData,
+            (),
         );
         if let Some(cause) = error {
             self.handle_error(
@@ -177,7 +174,7 @@ impl Context {
         self: &Arc<Self>,
         layer: *mut std::ffi::c_void,
     ) -> crate::Surface {
-        let id = self.0.instance_create_surface_metal(layer, PhantomData);
+        let id = self.0.instance_create_surface_metal(layer, ());
         crate::Surface {
             context: Arc::clone(self),
             id: Surface {
@@ -192,7 +189,7 @@ impl Context {
         self: &Arc<Self>,
         canvas: &web_sys::HtmlCanvasElement,
     ) -> Surface {
-        let id = self.0.create_surface_webgl_canvas(canvas, PhantomData);
+        let id = self.0.create_surface_webgl_canvas(canvas, ());
         Surface {
             id,
             configured_device: Mutex::default(),
@@ -204,9 +201,7 @@ impl Context {
         self: &Arc<Self>,
         canvas: &web_sys::OffscreenCanvas,
     ) -> Surface {
-        let id = self
-            .0
-            .create_surface_webgl_offscreen_canvas(canvas, PhantomData);
+        let id = self.0.create_surface_webgl_offscreen_canvas(canvas, ());
         Surface {
             id,
             configured_device: Mutex::default(),
@@ -218,9 +213,7 @@ impl Context {
         self: &Arc<Self>,
         visual: *mut std::ffi::c_void,
     ) -> crate::Surface {
-        let id = self
-            .0
-            .instance_create_surface_from_visual(visual, PhantomData);
+        let id = self.0.instance_create_surface_from_visual(visual, ());
         crate::Surface {
             context: Arc::clone(self),
             id: Surface {
@@ -853,7 +846,7 @@ impl crate::Context for Context {
         handle: &(impl raw_window_handle::HasRawWindowHandle + raw_window_handle::HasRawDisplayHandle),
     ) -> Self::SurfaceId {
         Surface {
-            id: self.0.instance_create_surface(handle, PhantomData),
+            id: self.0.instance_create_surface(handle, ()),
             configured_device: Mutex::new(None),
         }
     }
@@ -868,7 +861,7 @@ impl crate::Context for Context {
                 force_fallback_adapter: options.force_fallback_adapter,
                 compatible_surface: options.compatible_surface.map(|surface| surface.id.id),
             },
-            wgc::instance::AdapterInputs::Mask(wgt::Backends::all(), |_| PhantomData),
+            wgc::instance::AdapterInputs::Mask(wgt::Backends::all(), |_| ()),
         );
         ready(id.ok())
     }
@@ -892,7 +885,7 @@ impl crate::Context for Context {
             *adapter,
             &desc.map_label(|l| l.map(Borrowed)),
             trace_dir,
-            PhantomData
+            ()
         ));
         if let Some(err) = error {
             log::error!("Error in Adapter::request_device: {}", err);
@@ -1022,7 +1015,7 @@ impl crate::Context for Context {
             .lock()
             .expect("Surface was not configured?");
         match wgc::gfx_select!(
-            device_id => global.surface_get_current_texture(surface.id, PhantomData)
+            device_id => global.surface_get_current_texture(surface.id, ())
         ) {
             Ok(wgc::present::SurfaceOutput { status, texture_id }) => (
                 texture_id.map(|id| Texture {
@@ -1127,7 +1120,7 @@ impl crate::Context for Context {
             ShaderSource::Naga(module) => wgc::pipeline::ShaderModuleSource::Naga(module),
         };
         let (id, error) = wgc::gfx_select!(
-            device.id => global.device_create_shader_module(device.id, &descriptor, source, PhantomData)
+            device.id => global.device_create_shader_module(device.id, &descriptor, source, ())
         );
         if let Some(cause) = error {
             self.handle_error(
@@ -1154,7 +1147,7 @@ impl crate::Context for Context {
             shader_bound_checks: wgt::ShaderBoundChecks::unchecked(),
         };
         let (id, error) = wgc::gfx_select!(
-            device.id => global.device_create_shader_module_spirv(device.id, &descriptor, Borrowed(&desc.source), PhantomData)
+            device.id => global.device_create_shader_module_spirv(device.id, &descriptor, Borrowed(&desc.source), ())
         );
         if let Some(cause) = error {
             self.handle_error(
@@ -1179,7 +1172,7 @@ impl crate::Context for Context {
             entries: Borrowed(desc.entries),
         };
         let (id, error) = wgc::gfx_select!(
-            device.id => global.device_create_bind_group_layout(device.id, &descriptor, PhantomData)
+            device.id => global.device_create_bind_group_layout(device.id, &descriptor, ())
         );
         if let Some(cause) = error {
             self.handle_error(
@@ -1280,7 +1273,7 @@ impl crate::Context for Context {
         let (id, error) = wgc::gfx_select!(device.id => global.device_create_bind_group(
             device.id,
             &descriptor,
-            PhantomData
+            ()
         ));
         if let Some(cause) = error {
             self.handle_error(
@@ -1323,7 +1316,7 @@ impl crate::Context for Context {
         let (id, error) = wgc::gfx_select!(device.id => global.device_create_pipeline_layout(
             device.id,
             &descriptor,
-            PhantomData
+            ()
         ));
         if let Some(cause) = error {
             self.handle_error(
@@ -1358,8 +1351,8 @@ impl crate::Context for Context {
         let implicit_pipeline_ids = match desc.layout {
             Some(_) => None,
             None => Some(wgc::device::ImplicitPipelineIds {
-                root_id: PhantomData,
-                group_ids: &[PhantomData; wgc::MAX_BIND_GROUPS],
+                root_id: (),
+                group_ids: &[(); wgc::MAX_BIND_GROUPS],
             }),
         };
         let descriptor = pipe::RenderPipelineDescriptor {
@@ -1389,7 +1382,7 @@ impl crate::Context for Context {
         let (id, error) = wgc::gfx_select!(device.id => global.device_create_render_pipeline(
             device.id,
             &descriptor,
-            PhantomData,
+            (),
             implicit_pipeline_ids
         ));
         if let Some(cause) = error {
@@ -1418,8 +1411,8 @@ impl crate::Context for Context {
         let implicit_pipeline_ids = match desc.layout {
             Some(_) => None,
             None => Some(wgc::device::ImplicitPipelineIds {
-                root_id: PhantomData,
-                group_ids: &[PhantomData; wgc::MAX_BIND_GROUPS],
+                root_id: (),
+                group_ids: &[(); wgc::MAX_BIND_GROUPS],
             }),
         };
         let descriptor = pipe::ComputePipelineDescriptor {
@@ -1435,7 +1428,7 @@ impl crate::Context for Context {
         let (id, error) = wgc::gfx_select!(device.id => global.device_create_compute_pipeline(
             device.id,
             &descriptor,
-            PhantomData,
+            (),
             implicit_pipeline_ids
         ));
         if let Some(cause) = error {
@@ -1467,7 +1460,7 @@ impl crate::Context for Context {
         let (id, error) = wgc::gfx_select!(device.id => global.device_create_buffer(
             device.id,
             &desc.map_label(|l| l.map(Borrowed)),
-            PhantomData
+            ()
         ));
         if let Some(cause) = error {
             self.handle_error(
@@ -1493,7 +1486,7 @@ impl crate::Context for Context {
         let (id, error) = wgc::gfx_select!(device.id => global.device_create_texture(
             device.id,
             &desc.map_label(|l| l.map(Borrowed)),
-            PhantomData
+            ()
         ));
         if let Some(cause) = error {
             self.handle_error(
@@ -1536,7 +1529,7 @@ impl crate::Context for Context {
         let (id, error) = wgc::gfx_select!(device.id => global.device_create_sampler(
             device.id,
             &descriptor,
-            PhantomData
+            ()
         ));
         if let Some(cause) = error {
             self.handle_error(
@@ -1559,7 +1552,7 @@ impl crate::Context for Context {
         let (id, error) = wgc::gfx_select!(device.id => global.device_create_query_set(
             device.id,
             &desc.map_label(|l| l.map(Borrowed)),
-            PhantomData
+            ()
         ));
         if let Some(cause) = error {
             self.handle_error_nolabel(&device.error_sink, cause, "Device::create_query_set");
@@ -1576,7 +1569,7 @@ impl crate::Context for Context {
         let (id, error) = wgc::gfx_select!(device.id => global.device_create_command_encoder(
             device.id,
             &desc.map_label(|l| l.map(Borrowed)),
-            PhantomData
+            ()
         ));
         if let Some(cause) = error {
             self.handle_error(
@@ -1742,7 +1735,7 @@ impl crate::Context for Context {
         };
         let global = &self.0;
         let (id, error) = wgc::gfx_select!(
-            texture.id => global.texture_create_view(texture.id, &descriptor, PhantomData)
+            texture.id => global.texture_create_view(texture.id, &descriptor, ())
         );
         if let Some(cause) = error {
             self.handle_error(
@@ -1848,7 +1841,7 @@ impl crate::Context for Context {
         index: u32,
     ) -> Self::BindGroupLayoutId {
         let global = &self.0;
-        let (id, error) = wgc::gfx_select!(*pipeline => global.compute_pipeline_get_bind_group_layout(*pipeline, index, PhantomData));
+        let (id, error) = wgc::gfx_select!(*pipeline => global.compute_pipeline_get_bind_group_layout(*pipeline, index, ()));
         if let Some(err) = error {
             panic!("Error reflecting bind group {}: {}", index, err);
         }
@@ -1860,7 +1853,7 @@ impl crate::Context for Context {
         index: u32,
     ) -> Self::BindGroupLayoutId {
         let global = &self.0;
-        let (id, error) = wgc::gfx_select!(*pipeline => global.render_pipeline_get_bind_group_layout(*pipeline, index, PhantomData));
+        let (id, error) = wgc::gfx_select!(*pipeline => global.render_pipeline_get_bind_group_layout(*pipeline, index, ()));
         if let Some(err) = error {
             panic!("Error reflecting bind group {}: {}", index, err);
         }
@@ -2183,7 +2176,7 @@ impl crate::Context for Context {
         let (id, error) = wgc::gfx_select!(encoder.parent() => global.render_bundle_encoder_finish(
             encoder,
             &desc.map_label(|l| l.map(Borrowed)),
-            PhantomData
+            ()
         ));
         if let Some(err) = error {
             self.handle_error_fatal(err, "RenderBundleEncoder::finish");
@@ -2230,7 +2223,7 @@ impl crate::Context for Context {
     ) -> QueueWriteBuffer {
         let global = &self.0;
         match wgc::gfx_select!(
-            *queue => global.queue_create_staging_buffer(*queue, size, PhantomData)
+            *queue => global.queue_create_staging_buffer(*queue, size, ())
         ) {
             Ok((buffer_id, ptr)) => QueueWriteBuffer {
                 buffer_id,