1 files changed, 1 insertions, 18 deletions
diff --git a/src/bytes_mut.rs b/src/bytes_mut.rs
index 569f8be..537f01a 100644
--- a/src/bytes_mut.rs
+++ b/src/bytes_mut.rs
@@ -17,7 +17,7 @@ use crate::bytes::Vtable;
 #[allow(unused)]
 use crate::loom::sync::atomic::AtomicMut;
 use crate::loom::sync::atomic::{AtomicPtr, AtomicUsize, Ordering};
-use crate::{Buf, BufMut, Bytes};
+use crate::{offset_from, Buf, BufMut, Bytes};
 
 /// A unique reference to a contiguous slice of memory.
 ///
@@ -1683,23 +1683,6 @@ fn invalid_ptr<T>(addr: usize) -> *mut T {
     ptr.cast::<T>()
 }
 
-/// Precondition: dst >= original
-///
-/// The following line is equivalent to:
-///
-/// ```rust,ignore
-/// self.ptr.as_ptr().offset_from(ptr) as usize;
-/// ```
-///
-/// But due to min rust is 1.39 and it is only stabilized
-/// in 1.47, we cannot use it.
-#[inline]
-fn offset_from(dst: *mut u8, original: *mut u8) -> usize {
-    debug_assert!(dst >= original);
-
-    dst as usize - original as usize
-}
-
 unsafe fn rebuild_vec(ptr: *mut u8, mut len: usize, mut cap: usize, off: usize) -> Vec<u8> {
     let ptr = ptr.sub(off);
     len += off;