From: Tiezhu Yang <yangtiezhu@loongson.cn>
Date: Tue, 10 Feb 2026 11:31:13 +0000 (+0800)
Subject: LoongArch: Guard percpu handler under !CONFIG_PREEMPT_RT
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=70b0faae3590c628a98a627a10e5d211310169d4;p=thirdparty%2Fkernel%2Fstable.git

LoongArch: Guard percpu handler under !CONFIG_PREEMPT_RT

After commit 88fd2b70120d ("LoongArch: Fix sleeping in atomic context for
PREEMPT_RT"), it should guard percpu handler under !CONFIG_PREEMPT_RT to
avoid redundant operations.

Cc: stable@vger.kernel.org
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---

diff --git a/arch/loongarch/kernel/unwind_prologue.c b/arch/loongarch/kernel/unwind_prologue.c
index 729e775bd40d..ee1c29686ab0 100644
--- a/arch/loongarch/kernel/unwind_prologue.c
+++ b/arch/loongarch/kernel/unwind_prologue.c
@@ -65,7 +65,7 @@ static inline bool scan_handlers(unsigned long entry_offset)
 
 static inline bool fix_exception(unsigned long pc)
 {
-#ifdef CONFIG_NUMA
+#if defined(CONFIG_NUMA) && !defined(CONFIG_PREEMPT_RT)
 	int cpu;
 
 	for_each_possible_cpu(cpu) {