LoongArch: Guard percpu handler under !CONFIG_PREEMPT_RT

seehearfeel · Sasha Levin · commit 76a0e30a1cea · 2026-03-04T07:21:26.000-05:00
[ Upstream commit 70b0faa ] After commit 88fd2b7 ("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> Signed-off-by: Sasha Levin <sashal@kernel.org>
diff --git 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) {

Original file line number	Diff line number	Diff line change
`@@ -65,7 +65,7 @@ static inline bool scan_handlers(unsigned long entry_offset)`
`65`	`65`
`66`	`66`	`static inline bool fix_exception(unsigned long pc)`
`67`	`67`	`{`
`68`		`-#ifdef CONFIG_NUMA`
	`68`	`+#if defined(CONFIG_NUMA) && !defined(CONFIG_PREEMPT_RT)`
`69`	`69`	`int cpu;`
`70`	`70`
`71`	`71`	`for_each_possible_cpu(cpu) {`