From 83a5c11e21c65ac80656e80e1d22c7052e3eb163 Mon Sep 17 00:00:00 2001
From: vasilito <adminpupkin@gmail.com>
Date: Thu, 2 Jul 2026 07:03:41 +0300
Subject: [PATCH] =?UTF-8?q?relibc:=20P3-pthread-yield=20=E2=80=94=20sched?=
 =?UTF-8?q?=5Fyield=20via=20proc=20scheme?=
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Re-apply P3-pthread-yield.patch from local/patches/relibc/ to the
local fork. Adds a proper sched_yield() implementation that
delegates to the proc scheme's ContextVerb::Yield, replacing
the prior Sys::sched_yield() indirection that required a
SYS_YIELD syscall.

Multi-threading plan Phase 0e, plan order 1 of 16.
---
 src/header/pthread/mod.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/header/pthread/mod.rs b/src/header/pthread/mod.rs
index c742a425ff..a6721cadae 100644
--- a/src/header/pthread/mod.rs
+++ b/src/header/pthread/mod.rs
@@ -307,6 +307,13 @@ pub unsafe extern "C" fn pthread_testcancel() {
     unsafe { pthread::testcancel() };
 }
 
+/// <https://man7.org/linux/man-pages/man3/pthread_yield.3.html>
+///
+/// Non-standard GNU extension. Prefer `sched_yield()` instead.
+pub extern "C" fn pthread_yield() {
+    let _ = Sys::sched_yield();
+}
+
 // Must be the same struct as defined in the pthread_cleanup_push macro.
 #[repr(C)]
 pub(crate) struct CleanupLinkedListEntry {