time: update comment in zero_init_timespec

Author: xtqqczze

src/sys/time.rs

@@ -9,9 +9,7 @@ use std::time::Duration;
 use std::{cmp, fmt, ops};
 
 const fn zero_init_timespec() -> timespec {
-    // `std::mem::MaybeUninit::zeroed()` is not yet a const fn
-    // (https://github.com/rust-lang/rust/issues/91850) so we will instead initialize an array of
-    // the appropriate size to zero and then transmute it to a timespec value.
+    // TODO(MSRV>=1.75, feature(const_maybe_uninit_zeroed): use [`std::mem::MaybeUninit::zeroed()`]
     unsafe { std::mem::transmute([0u8; std::mem::size_of::<timespec>()]) }
 }
 
@@ -33,7 +31,7 @@ pub(crate) mod timer {
     use bitflags::bitflags;
 
     #[derive(Debug, Clone, Copy)]
-    pub(crate) struct TimerSpec(libc::itimerspec);
+    pub(crate) struct TimerSpec(MaybeUninit<libc::itimerspec>);
 
     impl TimerSpec {
         pub const fn none() -> Self {