rust: alloc: clarify what is the upstream version

It may be unclear for readers which upstream Rust version these files are based on. They may be unaware that they are intended to match the minimum (and only, so far) supported version of Rust in the kernel. Thus clarify it. Reviewed-by: Benno Lossin <[email protected]> Reviewed-by: Björn Roy Baron <[email protected]> Reviewed-by: Gary Guo <[email protected]> Reviewed-by: Martin Rodriguez Reboredo <[email protected]> Tested-by: Ariel Miculas <[email protected]> Tested-by: David Gow <[email protected]> Tested-by: Boqun Feng <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Miguel Ojeda <[email protected]>
hmtheboy154 · May 31, 2023 · f438c1d · f438c1d
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diff --git a/rust/alloc/README.md b/rust/alloc/README.md
@@ -10,6 +10,9 @@ upstream. In general, only additions should be performed (e.g. new
 methods). Eventually, changes should make it into upstream so that,
 at some point, this fork can be dropped from the kernel tree.
 
+The Rust upstream version on top of which these files are based matches
+the output of `scripts/min-tool-version.sh rustc`.
+
 
 ## Rationale