Commit 74dbeee0 authored Sep 27, 2014 by Behan Webster Committed by Russell King Nov 13, 2014

ARM: 8172/1: 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 <behanw@converseincode.com>
Reviewed-by: Mark Charlebois <charlebm@gmail.com>
Reviewed-by: Jan-Simon Möller <dl9pf@gmx.de>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent a556ee12

arch/arm/kernel/stacktrace.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -134,12 +134,10 @@ static noinline void __save_stack_trace(struct task_struct *tsk,
		frame.pc = thread_saved_pc(tsk);
		#endif
		} else {
		register unsigned long current_sp asm ("sp");

		/* We don't want this function nor the caller */
		data.skip += 2;
		frame.fp = (unsigned long)__builtin_frame_address(0);
		frame.sp = current_sp;
		frame.sp = current_stack_pointer;
		frame.lr = (unsigned long)__builtin_return_address(0);
		frame.pc = (unsigned long)__save_stack_trace;
		}

Admin message