[PATCH 2/2] nds32: Add macro definition for offset of lp register on stack

[Zong Li]

Use macro to replace the magic number.

Signed-off-by: Zong Li <z...@andestech.com>
---
 arch/nds32/include/asm/nds32.h | 1 +
 arch/nds32/kernel/stacktrace.c | 2 +-
 arch/nds32/kernel/traps.c      | 2 +-
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/nds32/include/asm/nds32.h b/arch/nds32/include/asm/nds32.h
index 19b1939..68c3815 100644
--- a/arch/nds32/include/asm/nds32.h
+++ b/arch/nds32/include/asm/nds32.h
@@ -17,6 +17,7 @@
 #else
 #define FP_OFFSET (-2)
 #endif
+#define LP_OFFSET (-1)
 
 extern void __init early_trap_init(void);
 static inline void GIE_ENABLE(void)
diff --git a/arch/nds32/kernel/stacktrace.c b/arch/nds32/kernel/stacktrace.c
index 36bc870..d974c0c 100644
--- a/arch/nds32/kernel/stacktrace.c
+++ b/arch/nds32/kernel/stacktrace.c
@@ -31,7 +31,7 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct 
stack_trace *trace)
               && (fpn >= (unsigned long *)TASK_SIZE)) {
                unsigned long lpp, fpp;
 
-               lpp = fpn[-1];
+               lpp = fpn[LP_OFFSET];
                fpp = fpn[FP_OFFSET];
                if (!__kernel_text_address(lpp))
                        break;
diff --git a/arch/nds32/kernel/traps.c b/arch/nds32/kernel/traps.c
index f432310..b0b85b7 100644
--- a/arch/nds32/kernel/traps.c
+++ b/arch/nds32/kernel/traps.c
@@ -117,7 +117,7 @@ static void __dump(struct task_struct *tsk, unsigned long 
*base_reg)
                       !((unsigned long)base_reg & 0x3) &&
                       ((unsigned long)base_reg >= TASK_SIZE)) {
                        unsigned long next_fp;
-                       ret_addr = base_reg[-1];
+                       ret_addr = base_reg[LP_OFFSET];
                        next_fp = base_reg[FP_OFFSET];
                        if (__kernel_text_address(ret_addr)) {
 
-- 
2.7.4