refactor: remove #![feature(raw_ref_macros)], start using it everywhere

`raw_ref_macros` has been stabilized by
<rust-lang/rust#80886>.

Author: yvt

src/r3/src/lib.rs

@@ -13,7 +13,6 @@
 #![feature(exhaustive_patterns)] // `let Ok(()) = Ok::<(), !>(())`
 #![feature(decl_macro)]
 #![feature(set_ptr_value)] // `<*const T>::set_ptr_value`
-#![feature(raw_ref_macros)]
 #![feature(or_patterns)]
 #![feature(option_result_unwrap_unchecked)] // `Option<T>::unwrap_unchecked`
 #![feature(cfg_target_has_atomic)] // `#[cfg(target_has_atomic_load_store)]`

src/r3_port_arm/src/sp804/cfg.rs

@@ -93,8 +93,7 @@ macro_rules! use_sp804 {
                 type TicklessState = tickless::TicklessState<TICKLESS_CFG>;
 
                 fn tickless_state() -> *mut Self::TicklessState {
-                    // FIXME: Use `core::ptr::addr_of_mut!` when it's stable
-                    unsafe { &mut TIMER_STATE }
+                    unsafe { core::ptr::addr_of_mut!(TIMER_STATE) }
                 }
             }
 

src/r3_port_riscv/src/timer/cfg.rs

@@ -97,8 +97,7 @@ macro_rules! use_timer {
                 type TicklessState = tickless::TicklessState<TICKLESS_CFG>;
 
                 fn tickless_state() -> *mut Self::TicklessState {
-                    // FIXME: Use `core::ptr::addr_of_mut!` when it's stable
-                    unsafe { &mut TIMER_STATE }
+                    unsafe { core::ptr::addr_of_mut!(TIMER_STATE) }
                 }
             }
 

src/r3_port_riscv_test_driver/src/main.rs

@@ -5,7 +5,6 @@
 #![feature(naked_functions)]
 #![feature(global_asm)]
 #![feature(decl_macro)]
-#![feature(raw_ref_macros)]
 #![feature(const_ptr_offset)]
 #![feature(unsafe_block_in_unsafe_fn)] // `unsafe fn` doesn't imply `unsafe {}`
 #![deny(unsafe_op_in_unsafe_fn)]

src/r3_support_rza1/src/os_timer/cfg.rs

@@ -92,8 +92,7 @@ macro_rules! use_os_timer {
                 type TicklessState = tickless::TicklessState<TICKLESS_CFG>;
 
                 fn tickless_state() -> *mut Self::TicklessState {
-                    // FIXME: Use `core::ptr::addr_of_mut!` when it's stable
-                    unsafe { &mut TIMER_STATE }
+                    unsafe { core::ptr::addr_of_mut!(TIMER_STATE) }
                 }
             }