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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Mon, 1 Jul 2019 17:39:28 +0200
Subject: [PATCH] x86: Disable HAVE_ARCH_JUMP_LABEL
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.4/older/patches-5.4.3-rt1.tar.xz
__text_poke() does:
| local_irq_save(flags);
…
| ptep = get_locked_pte(poking_mm, poking_addr, &ptl);
which does not work on -RT because the PTE-lock is a spinlock_t typed lock.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
arch/x86/Kconfig | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -132,8 +132,8 @@ config X86
select HAVE_ALIGNED_STRUCT_PAGE if SLUB
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_HUGE_VMAP if X86_64 || X86_PAE
- select HAVE_ARCH_JUMP_LABEL
- select HAVE_ARCH_JUMP_LABEL_RELATIVE
+ select HAVE_ARCH_JUMP_LABEL if !PREEMPT_RT
+ select HAVE_ARCH_JUMP_LABEL_RELATIVE if !PREEMPT_RT
select HAVE_ARCH_KASAN if X86_64
select HAVE_ARCH_KGDB
select HAVE_ARCH_MMAP_RND_BITS if MMU
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