linux-kernel - [PATCH] RISC-V: stacktrace: Declare sp_in

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Message-Id: <20200413161234.78346-1-linux@roeck-us.net>
Date:   Mon, 13 Apr 2020 09:12:34 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Palmer Dabbelt <palmer@...belt.com>
Cc:     Albert Ou <aou@...s.berkeley.edu>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>
Subject: [PATCH] RISC-V: stacktrace: Declare sp_in_global outside ifdef

riscv:allnoconfig and riscv:tinyconfig fail to compile.

arch/riscv/kernel/stacktrace.c: In function 'walk_stackframe':
arch/riscv/kernel/stacktrace.c:78:8: error: 'sp_in_global' undeclared

sp_in_global is declared inside CONFIG_FRAME_POINTER but used outside
of it.

Fixes: 52e7c52d2ded ("RISC-V: Stop relying on GCC's register allocator's hueristics")
Cc: Palmer Dabbelt <palmerdabbelt@...gle.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
Apologies for the noise if this has already been fixed somewhere.

 arch/riscv/kernel/stacktrace.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/kernel/stacktrace.c b/arch/riscv/kernel/stacktrace.c
index 02087fe539c6..6c854875ac74 100644
--- a/arch/riscv/kernel/stacktrace.c
+++ b/arch/riscv/kernel/stacktrace.c
@@ -12,6 +12,8 @@
 #include <linux/stacktrace.h>
 #include <linux/ftrace.h>
 
+register unsigned long sp_in_global __asm__("sp");
+
 #ifdef CONFIG_FRAME_POINTER
 
 struct stackframe {
@@ -19,8 +21,6 @@ struct stackframe {
 	unsigned long ra;
 };
 
-register unsigned long sp_in_global __asm__("sp");
-
 void notrace walk_stackframe(struct task_struct *task, struct pt_regs *regs,
 			     bool (*fn)(unsigned long, void *), void *arg)
 {
-- 
2.17.1