silence static mut ref warns

src/libboard_artiq/src/logger.rs

@@ -60,6 +60,7 @@ impl BufferLogger {
         }
     }
 
+    #[allow(static_mut_refs)]
     pub unsafe fn get_logger() -> &'static mut Option<BufferLogger> {
         &mut LOGGER
     }

src/libksupport/src/i2c.rs

@@ -1,3 +1,4 @@
+#![allow(static_mut_refs)]
 
 use crate::artiq_raise;
 

src/libksupport/src/kernel/dma.rs

@@ -23,6 +23,7 @@ pub struct DmaRecorder {
 
 static mut RECORDER: Option<DmaRecorder> = None;
 
+#[allow(static_mut_refs)]
 pub unsafe fn init_dma_recorder() {
     // as static would remain after restart, we have to reset it,
     // without running its destructor.
@@ -80,6 +81,7 @@ pub extern "C" fn dma_record_stop(duration: i64, enable_ddma: bool) {
 }
 
 #[inline(always)]
+#[allow(static_mut_refs)]
 unsafe fn dma_record_output_prepare(timestamp: i64, target: i32, words: usize) {
     // See gateware/rtio/dma.py.
     const HEADER_LENGTH: usize = /*length*/ 1 + /*channel*/3 + /*timestamp*/8 + /*address*/1;
@@ -117,6 +119,7 @@ pub extern "C" fn dma_record_output(target: i32, word: i32) {
     }
 }
 
+#[allow(static_mut_refs)]
 pub extern "C" fn dma_record_output_wide(target: i32, words: &CSlice<i32>) {
     assert!(words.len() <= 16); // enforce the hardware limit
 

src/libksupport/src/lib.rs

@@ -151,6 +151,7 @@ fn _resolve_channel_name(channel: u32, device_map: &BTreeMap<u32, String>) -> St
     }
 }
 
+#[allow(static_mut_refs)]
 pub fn resolve_channel_name(channel: u32) -> String {
     _resolve_channel_name(channel, unsafe { &RTIO_DEVICE_MAP })
 }

src/runtime/src/rtio_clocking.rs

@@ -442,6 +442,7 @@ fn set_fclk0_freq(clk: RtioClock, cfg: &Config) {
     );
 }
 
+#[allow(static_mut_refs)]
 pub fn init(timer: &mut GlobalTimer, cfg: &Config) {
     let clk = get_rtio_clock_cfg(cfg);
     #[cfg(has_si5324)]