From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932774AbaH0EaA (ORCPT ); Wed, 27 Aug 2014 00:30:00 -0400 Received: from mail-pd0-f178.google.com ([209.85.192.178]:62157 "EHLO mail-pd0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932621AbaH0E35 (ORCPT ); Wed, 27 Aug 2014 00:29:57 -0400 From: behanw@converseincode.com To: ard.biesheuvel@linaro.org, catalin.marinas@arm.com, cl@linux-foundation.org, jays.lee@samsung.com, k.khlebnikov@samsung.com, larry.bassel@linaro.org, olof@lixom.net, peterz@infradead.org, takahiro.akashi@linaro.org, tglx@linutronix.de, tj@kernel.org, will.deacon@arm.com Cc: christoffer.dall@linaro.org, kgene.kim@samsung.com, khilman@linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, sungjinn.chung@samsung.com, Behan Webster , Mark Charlebois Subject: [PATCH V2 6/6] arm64: LLVMLinux: Use global stack pointer in return_address() Date: Tue, 26 Aug 2014 21:29:34 -0700 Message-Id: <1409113774-3172-7-git-send-email-behanw@converseincode.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1409113774-3172-1-git-send-email-behanw@converseincode.com> References: <20140826141608.GT23445@arm.com> <1409113774-3172-1-git-send-email-behanw@converseincode.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Behan Webster 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 --- 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 89102a6..6c4fd28 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); -- 1.9.1