From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753062AbaIFAIB (ORCPT ); Fri, 5 Sep 2014 20:08:01 -0400 Received: from mail-pa0-f41.google.com ([209.85.220.41]:40533 "EHLO mail-pa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752575AbaIFAHB (ORCPT ); Fri, 5 Sep 2014 20:07:01 -0400 From: behanw@converseincode.com To: a.ryabinin@samsung.com, anurag19aggarwal@gmail.com, charlebm@gmail.com, cl@linux-foundation.org, dave.long@linaro.org, k.khlebnikov@samsung.com, linux@arm.linux.org.uk, linyongting@gmail.com, Nikolay.Borisov@arm.com, tglx@linutronix.de, tj@kernel.org, u.kleine-koenig@pengutronix.de Cc: behanw@converseincode.com, Dave.Martin@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, rabin@rab.in, rostedt@goodmis.org, rric@kernel.org, will.deacon@arm.com Subject: [PATCH v2 7/7] arm: LLVMLinux: Use global stack register variable for percpu Date: Fri, 5 Sep 2014 17:06:17 -0700 Message-Id: <1409961977-11762-8-git-send-email-behanw@converseincode.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1409961977-11762-1-git-send-email-behanw@converseincode.com> References: <1409961977-11762-1-git-send-email-behanw@converseincode.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mark Charlebois Using global current_stack_pointer works on both clang and gcc. current_stack_pointer is an unsigned long and needs to be cast as a pointer to dereference. Signed-off-by: Mark Charlebois --- arch/arm/include/asm/percpu.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/include/asm/percpu.h b/arch/arm/include/asm/percpu.h index 209e650..a89b407 100644 --- a/arch/arm/include/asm/percpu.h +++ b/arch/arm/include/asm/percpu.h @@ -30,14 +30,14 @@ static inline void set_my_cpu_offset(unsigned long off) static inline unsigned long __my_cpu_offset(void) { unsigned long off; - register unsigned long *sp asm ("sp"); /* * Read TPIDRPRW. * We want to allow caching the value, so avoid using volatile and * instead use a fake stack read to hazard against barrier(). */ - asm("mrc p15, 0, %0, c13, c0, 4" : "=r" (off) : "Q" (*sp)); + asm("mrc p15, 0, %0, c13, c0, 4" : "=r" (off) + : "Q" (*(const unsigned long *)current_stack_pointer)); return off; } -- 1.9.1