Check if sched_attr is in glibc

Resolves: RHEL-92952
Signed-off-by: John Kacur <jkacur@redhat.com>

.gitignore

@@ -16,3 +16,4 @@
 /stalld-1.19.5.tar.bz2
 /stalld-1.19.6.tar.bz2
 /stalld-1.19.8.tar.gz
+/stalld-1.19.8.tar.bz2

sources

@@ -1 +1 @@
-SHA512 (stalld-1.19.8.tar.gz) = 58c8c113aebd766df45f6af0ee1fa86adbcaca2c2f04c5fc347fb380aa798c9bbefe721111ae073f7f1e882a74d0ea5ce88d4cc31024a473e66ace21571ccfd8
+SHA512 (stalld-1.19.8.tar.bz2) = 349b715912d01544736102c79364d77de2a1e8b793bfd8613bfc3f19c874e8db63b54653eaa3fe831ff9ef6f721b85d180ea7b79a1d414246909700a96ce996e

stalld-sched_attr-Do-not-define-for-glibc-2.41.patch

@@ -0,0 +1,33 @@
+From b79c1777ee16901b3d27cd25e50435f4f060cfa8 Mon Sep 17 00:00:00 2001
+From: John Kacur <jkacur@redhat.com>
+Date: Thu, 22 May 2025 11:33:07 -0400
+Subject: [PATCH] stalld: sched_attr: Do not define for glibc >= 2.41
+
+glibc >=2.41 has definitions for struct sched_attr and
+sched_setattr and sched_getattr
+
+Sometimes this is backported by distributions so define conditionally on
+SCHED_ATTR_SIZE_VER0
+
+Signed-off-by: John Kacur <jkacur@redhat.com>
+---
+ src/stalld.h | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/stalld.h b/src/stalld.h
+index 0c4dcee503ca..7b4d7e60f5f7 100644
+--- a/src/stalld.h
++++ b/src/stalld.h
+@@ -110,7 +110,8 @@ struct stalld_backend {
+ 	void (*destroy)(void);
+ };
+ 
+-#if ! __GLIBC_PREREQ(2, 41) && !defined(GLIBC_HAS_SCHED_ATTR)
++/* sched_attr is not defined in glibc < 2.41, unless backported */
++#ifndef SCHED_ATTR_SIZE_VER0
+ 
+ #ifdef __x86_64__
+ # define __NR_sched_setattr 314
+-- 
+2.49.0
+

stalld.spec

@@ -1,11 +1,11 @@
 Name:		stalld
 Version:	1.19.8
-Release:	1%{?dist}
+Release:	2%{?dist}
 Summary:	Daemon that finds starving tasks and gives them a temporary boost
 
 License:	GPLv2
 URL:		https://gitlab.com/rt-linux-tools/%{name}/%{name}.git
-Source0:	https://gitlab.com/rt-linux-tools/%{name}/-/archive/v%{version}/%{name}-%{version}.tar.gz
+Source0:	https://gitlab.com/rt-linux-tools/%{name}/-/archive/v%{version}/%{name}-%{version}.tar.bz2
 
 BuildRequires:	glibc-devel
 BuildRequires:	gcc
@@ -22,6 +22,9 @@ BuildRequires:	libbpf-devel
 Requires:	libbpf
 %endif
 
+# Patches
+Patch1: stalld-sched_attr-Do-not-define-for-glibc-2.41.patch
+
 %define _hardened_build 1
 
 %description
@@ -61,6 +64,10 @@ allow 10 microseconds of runtime for 1 second of clock time.
 %systemd_postun_with_restart %{name}.service
 
 %changelog
+* Thu May 22 2025 John Kacur <jkacur@redhat.com> - 1.19.8-2
+- Check if sched_attr is in glibc
+Resolves: RHEL-92952
+
 * Wed May 21 2025 John Kacur <jkacur@redhat.com> - 1.19.8-1
 - Rebase to stalld-1.19.8
 Resolves: RHEL-92952