linux-kernel - [PATCH v2 2/8] riscv: smp: move ipi_cpu_crash

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Message-Id: <20251118025015.42491-3-cuiyunhui@bytedance.com>
Date: Tue, 18 Nov 2025 10:50:09 +0800
From: Yunhui Cui <cuiyunhui@...edance.com>
To: conor@...nel.org,
	paul.walmsley@...ive.com,
	palmer@...belt.com,
	aou@...s.berkeley.edu,
	alex@...ti.fr,
	cuiyunhui@...edance.com,
	luxu.kernel@...edance.com,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
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Subject: [PATCH v2 2/8] riscv: smp: move ipi_cpu_crash_stop() declaration to smp.h

Move ipi_cpu_crash_stop() declaration from smp.c to smp.h to enable
external reference, and rename it to cpu_crash_stop().

Signed-off-by: Yunhui Cui <cuiyunhui@...edance.com>
---
 arch/riscv/include/asm/smp.h | 9 +++++++++
 arch/riscv/kernel/smp.c      | 9 ++-------
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h
index 7ac80e9f22889..f53f1f0e7aa9e 100644
--- a/arch/riscv/include/asm/smp.h
+++ b/arch/riscv/include/asm/smp.h
@@ -54,6 +54,15 @@ void riscv_ipi_set_virq_range(int virq, int nr);
 /* Check other CPUs stop or not */
 bool smp_crash_stop_failed(void);
 
+#ifdef CONFIG_KEXEC_CORE
+void cpu_crash_stop(unsigned int cpu, struct pt_regs *regs);
+#else
+static inline void cpu_crash_stop(unsigned int cpu, struct pt_regs *regs)
+{
+	unreachable();
+}
+#endif
+
 /* Secondary hart entry */
 asmlinkage void smp_callin(void);
 
diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c
index e650dec448176..9dbcb9a06a96d 100644
--- a/arch/riscv/kernel/smp.c
+++ b/arch/riscv/kernel/smp.c
@@ -78,7 +78,7 @@ static void ipi_stop(void)
 #ifdef CONFIG_KEXEC_CORE
 static atomic_t waiting_for_crash_ipi = ATOMIC_INIT(0);
 
-static inline void ipi_cpu_crash_stop(unsigned int cpu, struct pt_regs *regs)
+void cpu_crash_stop(unsigned int cpu, struct pt_regs *regs)
 {
 	crash_save_cpu(regs, cpu);
 
@@ -94,11 +94,6 @@ static inline void ipi_cpu_crash_stop(unsigned int cpu, struct pt_regs *regs)
 	for(;;)
 		wait_for_interrupt();
 }
-#else
-static inline void ipi_cpu_crash_stop(unsigned int cpu, struct pt_regs *regs)
-{
-	unreachable();
-}
 #endif
 
 static void send_ipi_mask(const struct cpumask *mask, enum ipi_message_type op)
@@ -134,7 +129,7 @@ static irqreturn_t handle_IPI(int irq, void *data)
 		ipi_stop();
 		break;
 	case IPI_CPU_CRASH_STOP:
-		ipi_cpu_crash_stop(cpu, get_irq_regs());
+		cpu_crash_stop(cpu, get_irq_regs());
 		break;
 	case IPI_IRQ_WORK:
 		irq_work_run();
-- 
2.39.5