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Commit 0bf4954f authored by Behan Webster's avatar Behan Webster Committed by Russell King
Browse files

ARM: 8176/1: Use current_stack_pointer in unwind_backtrace 



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: default avatarBehan Webster <behanw@converseincode.com>
Reviewed-by: default avatarMark Charlebois <charlebm@gmail.com>
Reviewed-by: default avatarJan-Simon Möller <dl9pf@gmx.de>
Acked-by: default avatarWill Deacon <will.deacon@arm.com>
Acked-by: default avatarNicolas Pitre <nico@linaro.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 0ebc1f56

arch/arm/kernel/unwind.c

+1 −2
Original line number Diff line number Diff line
@@ -471,7 +471,6 @@ int unwind_frame(struct stackframe *frame) 
void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk)

{

	struct stackframe frame;

	register unsigned long current_sp asm ("sp");



	pr_debug("%s(regs = %p tsk = %p)\n", __func__, regs, tsk);
@@ -485,7 +484,7 @@ void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk) 
			frame.pc = regs->ARM_lr;

	} else if (tsk == current) {

		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)unwind_backtrace;

	} else {