From 091b9450858ecd60eeb5a14231db07071d24875f Mon Sep 17 00:00:00 2001
From: Kefeng Wang
Date: Mon, 11 Jan 2021 20:40:12 +0800
Subject: riscv: Add dump stack in show_regs

Like commit 1149aad10b1e ("arm64: Add dump_backtrace() in show_regs"),
dump the stack in riscv show_regs as common code expects.

Reviewed-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/kernel/process.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'arch/riscv/kernel/process.c')

diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c
index f786b5fc6bcb..ced48d9f4254 100644
--- a/arch/riscv/kernel/process.c
+++ b/arch/riscv/kernel/process.c
@@ -18,6 +18,7 @@
 #include <asm/unistd.h>
 #include <asm/processor.h>
 #include <asm/csr.h>
+#include <asm/stacktrace.h>
 #include <asm/string.h>
 #include <asm/switch_to.h>
 #include <asm/thread_info.h>
@@ -39,7 +40,7 @@ void arch_cpu_idle(void)
 	raw_local_irq_enable();
 }
 
-void show_regs(struct pt_regs *regs)
+void __show_regs(struct pt_regs *regs)
 {
 	show_regs_print_info(KERN_DEFAULT);
 
@@ -69,6 +70,12 @@ void show_regs(struct pt_regs *regs)
 	pr_cont("status: " REG_FMT " badaddr: " REG_FMT " cause: " REG_FMT "\n",
 		regs->status, regs->badaddr, regs->cause);
 }
+void show_regs(struct pt_regs *regs)
+{
+	__show_regs(regs);
+	if (!user_mode(regs))
+		dump_backtrace(regs, NULL, KERN_DEFAULT);
+}
 
 void start_thread(struct pt_regs *regs, unsigned long pc,
 	unsigned long sp)
-- 
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