prevent inlining of prune when explicit_clear is enabled on nightly builds to prevent clflush asm being inlined

Cargo.lock

@@ -34,7 +34,7 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chacha20"
-version = "1.1.0"
+version = "1.1.1"
 dependencies = [
  "base64",
  "getrandom",

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "chacha20"
 description = "chacha20_poly1305 encryption tool"
-version = "1.1.0"
+version = "1.1.1"
 authors = ["Avril <flanchan@cumallover.me>"]
 edition = "2018"
 license = "gpl-3.0-or-later"

src/stream.rs

@@ -97,6 +97,7 @@ where W: Write
     /// Clear the internal buffer while keeping it allocated for further use.
     ///
     /// This does not affect operations at all, all it does is 0 out the left-over temporary buffer from the last operation(s).
+    #[cfg_attr(all(nightly, feature="explicit_clear"), inline(never))] // We don't want this asm! being inlined and preventing other optimisations on caller functions.
     pub fn prune(&mut self)
     {
 	#[cfg(feature="explicit_clear")]