diff --git a/devices/src/legacy/rtc_pl031.rs b/devices/src/legacy/rtc_pl031.rs
index 27ae60a1c..6d157cbc3 100644
--- a/devices/src/legacy/rtc_pl031.rs
+++ b/devices/src/legacy/rtc_pl031.rs
@@ -61,12 +61,10 @@ pub enum ClockType {
     /// Equivalent to `libc::CLOCK_MONOTONIC`.
     Monotonic,
     /// Equivalent to `libc::CLOCK_REALTIME`.
-    #[allow(dead_code)]
     Real,
     /// Equivalent to `libc::CLOCK_PROCESS_CPUTIME_ID`.
     ProcessCpu,
     /// Equivalent to `libc::CLOCK_THREAD_CPUTIME_ID`.
-    #[allow(dead_code)]
     ThreadCpu,
 }
 
@@ -101,7 +99,7 @@ pub struct LocalTime {
 
 impl LocalTime {
     /// Returns the [LocalTime](struct.LocalTime.html) structure for the calling moment.
-    #[allow(dead_code)]
+    #[cfg(test)]
     pub fn now() -> LocalTime {
         let mut timespec = libc::timespec {
             tv_sec: 0,
@@ -173,22 +171,6 @@ impl Default for TimestampUs {
     }
 }
 
-/// Returns a timestamp in nanoseconds from a monotonic clock.
-///
-/// Uses `_rdstc` on `x86_64` and [`get_time`](fn.get_time.html) on other architectures.
-#[allow(dead_code)]
-pub fn timestamp_cycles() -> u64 {
-    #[cfg(target_arch = "x86_64")]
-    // SAFETY: there's nothing that can go wrong with this call.
-    unsafe {
-        std::arch::x86_64::_rdtsc() as u64
-    }
-    #[cfg(not(target_arch = "x86_64"))]
-    {
-        get_time(ClockType::Monotonic)
-    }
-}
-
 /// Returns a timestamp in nanoseconds based on the provided clock type.
 ///
 /// # Arguments
@@ -525,7 +507,6 @@ mod tests {
         ($test_name: ident, $write_fn_name: ident, $read_fn_name: ident, $is_be: expr, $data_type: ty) => {
             #[test]
             fn $test_name() {
-                #[allow(overflowing_literals)]
                 let test_cases = [
                     (
                         0x0123_4567_89AB_CDEF as u64,
diff --git a/devices/src/lib.rs b/devices/src/lib.rs
index cd8291801..1b8b0ca2c 100644
--- a/devices/src/lib.rs
+++ b/devices/src/lib.rs
@@ -33,11 +33,9 @@ bitflags! {
     }
 }
 
-#[allow(unused_macros)]
 #[cfg(target_arch = "aarch64")]
 macro_rules! generate_read_fn {
     ($fn_name: ident, $data_type: ty, $byte_type: ty, $type_size: expr, $endian_type: ident) => {
-        #[allow(dead_code)]
         pub fn $fn_name(input: &[$byte_type]) -> $data_type {
             assert!($type_size == std::mem::size_of::<$data_type>());
             let mut array = [0u8; $type_size];
@@ -49,11 +47,9 @@ macro_rules! generate_read_fn {
     };
 }
 
-#[allow(unused_macros)]
 #[cfg(target_arch = "aarch64")]
 macro_rules! generate_write_fn {
     ($fn_name: ident, $data_type: ty, $byte_type: ty, $endian_type: ident) => {
-        #[allow(dead_code)]
         pub fn $fn_name(buf: &mut [$byte_type], n: $data_type) {
             for (byte, read) in buf
                 .iter_mut()