diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/csky/Kconfig | 1 | ||||
| -rw-r--r-- | arch/csky/include/asm/processor.h | 2 | ||||
| -rw-r--r-- | arch/csky/kernel/stacktrace.c | 6 |
3 files changed, 5 insertions, 4 deletions
diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index adee6ab36862..2236b5c0c213 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -9,6 +9,7 @@ config CSKY select ARCH_USE_BUILTIN_BSWAP select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS + select ARCH_HAS_CURRENT_STACK_POINTER select ARCH_INLINE_READ_LOCK if !PREEMPTION select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION diff --git a/arch/csky/include/asm/processor.h b/arch/csky/include/asm/processor.h index 63ad71fab30d..ea75d72dea86 100644 --- a/arch/csky/include/asm/processor.h +++ b/arch/csky/include/asm/processor.h @@ -84,4 +84,6 @@ unsigned long __get_wchan(struct task_struct *p); #define cpu_relax() barrier() +register unsigned long current_stack_pointer __asm__("sp"); + #endif /* __ASM_CSKY_PROCESSOR_H */ diff --git a/arch/csky/kernel/stacktrace.c b/arch/csky/kernel/stacktrace.c index 9f78f5d21511..27ecd63e321b 100644 --- a/arch/csky/kernel/stacktrace.c +++ b/arch/csky/kernel/stacktrace.c @@ -23,10 +23,9 @@ void notrace walk_stackframe(struct task_struct *task, struct pt_regs *regs, sp = user_stack_pointer(regs); pc = instruction_pointer(regs); } else if (task == NULL || task == current) { - const register unsigned long current_sp __asm__ ("sp"); const register unsigned long current_fp __asm__ ("r8"); fp = current_fp; - sp = current_sp; + sp = current_stack_pointer; pc = (unsigned long)walk_stackframe; } else { /* task blocked in __switch_to */ @@ -68,8 +67,7 @@ static void notrace walk_stackframe(struct task_struct *task, sp = user_stack_pointer(regs); pc = instruction_pointer(regs); } else if (task == NULL || task == current) { - const register unsigned long current_sp __asm__ ("sp"); - sp = current_sp; + sp = current_stack_pointer; pc = (unsigned long)walk_stackframe; } else { /* task blocked in __switch_to */ |