Remove unnecessary !Send markers

embassy-executor/src/arch/cortex_m.rs

@@ -18,9 +18,7 @@ mod thread {
     /// TODO
     // Name pending
     #[derive(Default)] // Default enables Executor::new
-    pub struct CortexMThreadContext {
-        _not_send: core::marker::PhantomData<*mut ()>,
-    }
+    pub struct CortexMThreadContext;
 
     impl ThreadContext for CortexMThreadContext {
         #[cfg(feature = "thread-context")]

embassy-executor/src/arch/riscv32.rs

@@ -8,7 +8,6 @@ compile_error!("`thread-context` is not supported with `arch-riscv32`.");
 pub use thread::*;
 #[cfg(feature = "executor-thread")]
 mod thread {
-    use core::marker::PhantomData;
     use core::sync::atomic::{AtomicBool, Ordering};
 
     #[cfg(feature = "nightly")]
@@ -28,9 +27,7 @@ mod thread {
     /// TODO
     // Name pending
     #[derive(Default)] // Default enables Executor::new
-    pub struct RiscVThreadContext {
-        _not_send: PhantomData<*mut ()>,
-    }
+    pub struct RiscVThreadContext;
 
     impl ThreadContext for RiscVThreadContext {
         fn context(&self) -> OpaqueThreadContext {

embassy-executor/src/arch/std.rs

@@ -8,7 +8,6 @@ compile_error!("`arch-std` requires `thread-context`.");
 pub use thread::*;
 #[cfg(feature = "executor-thread")]
 mod thread {
-    use std::marker::PhantomData;
     use std::sync::{Condvar, Mutex};
 
     #[cfg(feature = "nightly")]
@@ -20,16 +19,13 @@ mod thread {
     /// TODO
     // Name pending
     pub struct StdThreadCtx {
-        _not_send: PhantomData<*mut ()>,
         signaler: &'static Signaler,
     }
 
     impl Default for StdThreadCtx {
         fn default() -> Self {
-            let signaler = &*Box::leak(Box::new(Signaler::new()));
             Self {
-                _not_send: PhantomData,
-                signaler,
+                signaler: &*Box::leak(Box::new(Signaler::new())),
             }
         }
     }

embassy-executor/src/arch/xtensa.rs

@@ -27,15 +27,8 @@ mod thread {
 
     /// TODO
     // Name pending
-    pub struct XtensaThreadContext {
-        _not_send: PhantomData<*mut ()>,
-    }
-
-    impl Default for XtensaThreadContext {
-        fn default() -> Self {
-            Self { _not_send: PhantomData }
-        }
-    }
+    #[derive(Default)] // Default enables Executor::new
+    pub struct XtensaThreadContext;
 
     impl ThreadContext for XtensaThreadContext {
         fn context(&self) -> OpaqueThreadContext {