From a227bc7ee912d20146aaebc2de5d9bb8aa29665e Mon Sep 17 00:00:00 2001
From: ginnyTheCat <ginnythecat@lelux.net>
Date: Thu, 26 Mar 2026 17:42:08 +0100
Subject: [PATCH] Make std::fs::File Send on UEFI

---
 library/std/src/sys/fs/uefi.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/library/std/src/sys/fs/uefi.rs b/library/std/src/sys/fs/uefi.rs
index 8135519317a0..ef523a9807f1 100644
--- a/library/std/src/sys/fs/uefi.rs
+++ b/library/std/src/sys/fs/uefi.rs
@@ -588,6 +588,11 @@ pub(crate) struct File {
         path: crate::path::PathBuf,
     }
 
+    // SAFETY: UEFI has no regular threads, and as per <https://github.com/rust-lang/rust/issues/133604>
+    // std does not support being invoked from "irregular threads" such as interrupt handlers or other
+    // CPU cores that run outside the scope of UEFI.
+    unsafe impl Send for File {}
+
     impl File {
         pub(crate) fn from_path(path: &Path, open_mode: u64, attr: u64) -> io::Result<Self> {
             let absolute = crate::path::absolute(path)?;