arm64: LLVMLinux: Use current_stack_pointer in save_stack_trace_tsk

Use the global current_stack_pointer to get the value of the stack pointer. This change supports being able to compile the kernel with both gcc and clang. Signed-off-by: Behan Webster <[email protected]> Signed-off-by: Mark Charlebois <[email protected]> Reviewed-by: Jan-Simon Möller <[email protected]> Reviewed-by: Olof Johansson <[email protected]> Acked-by: Will Deacon <[email protected]> Signed-off-by: Will Deacon <[email protected]>
jbg · Sep 8, 2014 · bb28cec · bb28cec
1 parent 3337a10
commit bb28cec
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
@@ -111,10 +111,9 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
 		frame.sp = thread_saved_sp(tsk);
 		frame.pc = thread_saved_pc(tsk);
 	} else {
-		register unsigned long current_sp asm("sp");
 		data.no_sched_functions = 0;
 		frame.fp = (unsigned long)__builtin_frame_address(0);
-		frame.sp = current_sp;
+		frame.sp = current_stack_pointer;
 		frame.pc = (unsigned long)save_stack_trace_tsk;
 	}