diff --git a/build.rs b/build.rs
index ff9ebe35e7..38d2c1866d 100644
--- a/build.rs
+++ b/build.rs
@@ -19,8 +19,7 @@ fn main() {
         && !(target.starts_with("thumbv6m") | target.starts_with("thumbv8m.base"))
     {
         panic!(
-            "Unknown target '{}'. Need to update BASEPRI logic in build.rs.",
-            target
+            "Unknown target '{target}'. Need to update BASEPRI logic in build.rs."
         );
     }
 
diff --git a/macros/src/check.rs b/macros/src/check.rs
index 72d0a27024..a05c82e8a4 100644
--- a/macros/src/check.rs
+++ b/macros/src/check.rs
@@ -41,8 +41,7 @@ pub fn app(app: &App) -> parse::Result<()> {
         let s = {
             format!(
                 "not enough interrupts to dispatch \
-                    all software tasks (need: {}; given: {})",
-                need, given
+                    all software tasks (need: {need}; given: {given})"
             )
         };
 
diff --git a/macros/src/codegen/async_dispatchers.rs b/macros/src/codegen/async_dispatchers.rs
index f6408e1edf..be02ad09a1 100644
--- a/macros/src/codegen/async_dispatchers.rs
+++ b/macros/src/codegen/async_dispatchers.rs
@@ -85,8 +85,7 @@ pub fn codegen(app: &App, analysis: &Analysis) -> TokenStream2 {
 
         if level > 0 {
             let doc = format!(
-                "Interrupt handler to dispatch async tasks at priority {}",
-                level
+                "Interrupt handler to dispatch async tasks at priority {level}"
             );
             let attribute = &interrupts.get(&level).expect("UNREACHABLE").1.attrs;
             items.push(quote!(
diff --git a/macros/src/codegen/main.rs b/macros/src/codegen/main.rs
index 8e7138f438..2775d259cf 100644
--- a/macros/src/codegen/main.rs
+++ b/macros/src/codegen/main.rs
@@ -15,15 +15,13 @@ pub fn codegen(app: &App, analysis: &Analysis) -> TokenStream2 {
     let call_idle = if let Some(idle) = &app.idle {
         let name = &idle.name;
         quote!(#name(#name::Context::new()))
+    } else if analysis.channels.get(&0).is_some() {
+        let dispatcher = util::zero_prio_dispatcher_ident();
+        quote!(#dispatcher();)
     } else {
-        if analysis.channels.get(&0).is_some() {
-            let dispatcher = util::zero_prio_dispatcher_ident();
-            quote!(#dispatcher();)
-        } else {
-            quote!(loop {
-                rtic::export::nop()
-            })
-        }
+        quote!(loop {
+            rtic::export::nop()
+        })
     };
 
     let main = util::suffixed("main");
diff --git a/macros/src/codegen/pre_init.rs b/macros/src/codegen/pre_init.rs
index 14926888ab..28ba29c0e6 100644
--- a/macros/src/codegen/pre_init.rs
+++ b/macros/src/codegen/pre_init.rs
@@ -40,8 +40,7 @@ pub fn codegen(app: &App, analysis: &Analysis) -> Vec<TokenStream2> {
         }
     })) {
         let es = format!(
-            "Maximum priority used by interrupt vector '{}' is more than supported by hardware",
-            name
+            "Maximum priority used by interrupt vector '{name}' is more than supported by hardware"
         );
         // Compile time assert that this priority is supported by the device
         stmts.push(quote!(
@@ -69,8 +68,7 @@ pub fn codegen(app: &App, analysis: &Analysis) -> Vec<TokenStream2> {
         }
     }) {
         let es = format!(
-            "Maximum priority used by interrupt vector '{}' is more than supported by hardware",
-            name
+            "Maximum priority used by interrupt vector '{name}' is more than supported by hardware"
         );
         // Compile time assert that this priority is supported by the device
         stmts.push(quote!(
diff --git a/macros/src/codegen/util.rs b/macros/src/codegen/util.rs
index 6552839f76..a0caf0aeef 100644
--- a/macros/src/codegen/util.rs
+++ b/macros/src/codegen/util.rs
@@ -51,7 +51,7 @@ pub fn impl_mutex(
 
 /// Generates an identifier for the `EXECUTOR_RUN` atomics (`async` API)
 pub fn executor_run_ident(task: &Ident) -> Ident {
-    mark_internal_name(&format!("{}_EXECUTOR_RUN", task))
+    mark_internal_name(&format!("{task}_EXECUTOR_RUN"))
 }
 
 pub fn interrupt_ident() -> Ident {
@@ -78,12 +78,12 @@ pub fn is_exception(name: &Ident) -> bool {
 
 /// Mark a name as internal
 pub fn mark_internal_name(name: &str) -> Ident {
-    Ident::new(&format!("{}_{}", RTIC_INTERNAL, name), Span::call_site())
+    Ident::new(&format!("{RTIC_INTERNAL}_{name}"), Span::call_site())
 }
 
 /// Generate an internal identifier for tasks
 pub fn internal_task_ident(task: &Ident, ident_name: &str) -> Ident {
-    mark_internal_name(&format!("{}_{}", task, ident_name))
+    mark_internal_name(&format!("{task}_{ident_name}"))
 }
 
 fn link_section_index() -> usize {
@@ -153,7 +153,7 @@ pub fn local_resources_ident(ctxt: Context, app: &App) -> Ident {
 
 /// Generates an identifier for a ready queue, async task version
 pub fn rq_async_ident(async_task_name: &Ident) -> Ident {
-    mark_internal_name(&format!("ASYNC_TASK_{}_RQ", async_task_name))
+    mark_internal_name(&format!("ASYNC_TASK_{async_task_name}_RQ"))
 }
 
 /// Suffixed identifier
@@ -163,7 +163,7 @@ pub fn suffixed(name: &str) -> Ident {
 }
 
 pub fn static_shared_resource_ident(name: &Ident) -> Ident {
-    mark_internal_name(&format!("shared_resource_{}", name))
+    mark_internal_name(&format!("shared_resource_{name}"))
 }
 
 /// Generates an Ident for the number of 32 bit chunks used for Mask storage.
@@ -176,15 +176,15 @@ pub fn priority_masks_ident() -> Ident {
 }
 
 pub fn static_local_resource_ident(name: &Ident) -> Ident {
-    mark_internal_name(&format!("local_resource_{}", name))
+    mark_internal_name(&format!("local_resource_{name}"))
 }
 
 pub fn declared_static_local_resource_ident(name: &Ident, task_name: &Ident) -> Ident {
-    mark_internal_name(&format!("local_{}_{}", task_name, name))
+    mark_internal_name(&format!("local_{task_name}_{name}"))
 }
 
 pub fn need_to_lock_ident(name: &Ident) -> Ident {
-    Ident::new(&format!("{}_that_needs_to_be_locked", name), name.span())
+    Ident::new(&format!("{name}_that_needs_to_be_locked"), name.span())
 }
 
 pub fn zero_prio_dispatcher_ident() -> Ident {
diff --git a/macros/src/lib.rs b/macros/src/lib.rs
index 34f2bb619b..a8422d0927 100644
--- a/macros/src/lib.rs
+++ b/macros/src/lib.rs
@@ -39,9 +39,8 @@ pub fn app(args: TokenStream, input: TokenStream) -> TokenStream {
         Ok(x) => x,
     };
 
-    match check::app(&app) {
-        Err(e) => return e.to_compile_error().into(),
-        _ => {}
+    if let Err(e) = check::app(&app) {
+        return e.to_compile_error().into();
     }
 
     let analysis = analyze::app(analysis, &app);
@@ -86,7 +85,7 @@ pub fn app(args: TokenStream, input: TokenStream) -> TokenStream {
 
     // Try to write the expanded code to disk
     if let Some(out_str) = out_dir.to_str() {
-        fs::write(format!("{}/rtic-expansion.rs", out_str), ts.to_string()).ok();
+        fs::write(format!("{out_str}/rtic-expansion.rs"), ts.to_string()).ok();
     }
 
     ts.into()
diff --git a/macros/src/syntax/parse/app.rs b/macros/src/syntax/parse/app.rs
index 8a9242e91d..e797f75e37 100644
--- a/macros/src/syntax/parse/app.rs
+++ b/macros/src/syntax/parse/app.rs
@@ -450,8 +450,7 @@ impl App {
             return Err(parse::Error::new(
                 init.user_shared_struct.span(),
                 format!(
-                    "This name and the one defined on `#[shared]` are not the same. Should this be `{}`?",
-                    shared_resources_ident
+                    "This name and the one defined on `#[shared]` are not the same. Should this be `{shared_resources_ident}`?"
                 ),
             ));
         }
@@ -460,8 +459,7 @@ impl App {
             return Err(parse::Error::new(
                 init.user_local_struct.span(),
                 format!(
-                    "This name and the one defined on `#[local]` are not the same. Should this be `{}`?",
-                    local_resources_ident
+                    "This name and the one defined on `#[local]` are not the same. Should this be `{local_resources_ident}`?"
                 ),
             ));
         }
diff --git a/macros/src/syntax/parse/hardware_task.rs b/macros/src/syntax/parse/hardware_task.rs
index ff94bc5190..6207e564f5 100644
--- a/macros/src/syntax/parse/hardware_task.rs
+++ b/macros/src/syntax/parse/hardware_task.rs
@@ -39,9 +39,8 @@ impl HardwareTask {
 
         Err(parse::Error::new(
             span,
-            &format!(
-                "this task handler must have type signature `fn({}::Context)`",
-                name
+            format!(
+                "this task handler must have type signature `fn({name}::Context)`"
             ),
         ))
     }
@@ -83,9 +82,8 @@ impl HardwareTask {
 
         Err(parse::Error::new(
             span,
-            &format!(
-                "this task handler must have type signature `fn({}::Context)`",
-                name
+            format!(
+                "this task handler must have type signature `fn({name}::Context)`"
             ),
         ))
     }
diff --git a/macros/src/syntax/parse/idle.rs b/macros/src/syntax/parse/idle.rs
index ffec358fc4..aa2ef5e910 100644
--- a/macros/src/syntax/parse/idle.rs
+++ b/macros/src/syntax/parse/idle.rs
@@ -34,9 +34,8 @@ impl Idle {
 
         Err(parse::Error::new(
             item.sig.ident.span(),
-            &format!(
-                "this `#[idle]` function must have signature `fn({}::Context) -> !`",
-                name
+            format!(
+                "this `#[idle]` function must have signature `fn({name}::Context) -> !`"
             ),
         ))
     }
diff --git a/macros/src/syntax/parse/init.rs b/macros/src/syntax/parse/init.rs
index 61d35391fb..23130c85ac 100644
--- a/macros/src/syntax/parse/init.rs
+++ b/macros/src/syntax/parse/init.rs
@@ -41,9 +41,8 @@ impl Init {
 
         Err(parse::Error::new(
             span,
-            &format!(
-                "the `#[init]` function must have signature `fn({}::Context) -> (Shared resources struct, Local resources struct)`",
-                name
+            format!(
+                "the `#[init]` function must have signature `fn({name}::Context) -> (Shared resources struct, Local resources struct)`"
             ),
         ))
     }
diff --git a/macros/src/syntax/parse/software_task.rs b/macros/src/syntax/parse/software_task.rs
index 6be597e8fb..319620a4b0 100644
--- a/macros/src/syntax/parse/software_task.rs
+++ b/macros/src/syntax/parse/software_task.rs
@@ -33,9 +33,8 @@ impl SoftwareTask {
 
         Err(parse::Error::new(
             span,
-            &format!(
-                "this task handler must have type signature `async fn({}::Context)`",
-                name
+            format!(
+                "this task handler must have type signature `async fn({name}::Context)`"
             ),
         ))
     }
@@ -71,9 +70,8 @@ impl SoftwareTask {
 
         Err(parse::Error::new(
             span,
-            &format!(
-                "this task handler must have type signature `async fn({}::Context)`",
-                name
+            format!(
+                "this task handler must have type signature `async fn({name}::Context)`"
             ),
         ))
     }
diff --git a/macros/src/syntax/parse/util.rs b/macros/src/syntax/parse/util.rs
index 28c3eac6b6..900ef9d66f 100644
--- a/macros/src/syntax/parse/util.rs
+++ b/macros/src/syntax/parse/util.rs
@@ -234,17 +234,13 @@ pub fn parse_local_resources(content: ParseStream<'_>) -> parse::Result<LocalRes
 pub fn parse_inputs(inputs: Punctuated<FnArg, Token![,]>, name: &str) -> Option<Box<Pat>> {
     let mut inputs = inputs.into_iter();
 
-    match inputs.next() {
-        Some(FnArg::Typed(first)) => {
-            if type_is_path(&first.ty, &[name, "Context"]) {
-                // No more inputs
-                if inputs.next().is_none() {
-                    return Some(first.pat);
-                }
+    if let Some(FnArg::Typed(first)) = inputs.next() {
+        if type_is_path(&first.ty, &[name, "Context"]) {
+            // No more inputs
+            if inputs.next().is_none() {
+                return Some(first.pat);
             }
         }
-
-        _ => {}
     }
 
     None
diff --git a/src/export.rs b/src/export.rs
index bfd0f6dda1..091cfb87ce 100644
--- a/src/export.rs
+++ b/src/export.rs
@@ -298,9 +298,9 @@ pub unsafe fn lock<T, R, const M: usize>(
     if ceiling >= 4 {
         // safe to manipulate outside critical section
         // execute closure under protection of raised system ceiling
-        let r = interrupt::free(|_| f(&mut *ptr));
+        
         // safe to manipulate outside critical section
-        r
+        interrupt::free(|_| f(&mut *ptr))
     } else {
         // safe to manipulate outside critical section
         let mask = compute_mask(0, ceiling, masks);