linux/debian/patches-rt/0042-locking-Disable-spin-on-owner-for-RT.patch

From 228791648695b2759d55863d0e829300e310d40c Mon Sep 17 00:00:00 2001
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From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 17 Jul 2011 21:51:45 +0200
Subject: [PATCH 042/333] locking: Disable spin on owner for RT
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz

Drop spin on owner for mutex / rwsem. We are most likely not using it
but…

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/Kconfig.locks | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/Kconfig.locks b/kernel/Kconfig.locks
index 84d882f3e299..af27c4000812 100644
--- a/kernel/Kconfig.locks
+++ b/kernel/Kconfig.locks
@@ -225,11 +225,11 @@ config ARCH_SUPPORTS_ATOMIC_RMW
 
 config MUTEX_SPIN_ON_OWNER
 	def_bool y
-	depends on SMP && ARCH_SUPPORTS_ATOMIC_RMW
+	depends on SMP && ARCH_SUPPORTS_ATOMIC_RMW && !PREEMPT_RT_FULL
 
 config RWSEM_SPIN_ON_OWNER
        def_bool y
-       depends on SMP && RWSEM_XCHGADD_ALGORITHM && ARCH_SUPPORTS_ATOMIC_RMW
+       depends on SMP && RWSEM_XCHGADD_ALGORITHM && ARCH_SUPPORTS_ATOMIC_RMW && !PREEMPT_RT_FULL
 
 config LOCK_SPIN_ON_OWNER
        def_bool y
-- 
2.17.1