From a4ceab1adbe960c781e9e2f659d7f7840eefd786 Mon Sep 17 00:00:00 2001 From: Behan Webster Date: Wed, 27 Aug 2014 05:29:34 +0100 Subject: [PATCH] arm64: LLVMLinux: Use global stack pointer in return_address() The global register current_stack_pointer holds the current stack pointer. This change supports being able to compile the kernel with both gcc and clang. Author: Mark Charlebois Signed-off-by: Mark Charlebois Signed-off-by: Behan Webster Signed-off-by: Will Deacon --- arch/arm64/kernel/return_address.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/arm64/kernel/return_address.c b/arch/arm64/kernel/return_address.c index 89102a6ffad5..6c4fd2810ecb 100644 --- a/arch/arm64/kernel/return_address.c +++ b/arch/arm64/kernel/return_address.c @@ -36,13 +36,12 @@ void *return_address(unsigned int level) { struct return_address_data data; struct stackframe frame; - register unsigned long current_sp asm ("sp"); data.level = level + 2; data.addr = NULL; frame.fp = (unsigned long)__builtin_frame_address(0); - frame.sp = current_sp; + frame.sp = current_stack_pointer; frame.pc = (unsigned long)return_address; /* dummy */ walk_stackframe(&frame, save_return_addr, &data);