From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chen Gang Subject: [PATCH] arch: xtensa: include: asm: compiling issue, need cmpxchg64() defined. Date: Mon, 27 May 2013 19:57:01 +0800 Message-ID: <51A34A0D.5070407@asianux.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from intranet.asianux.com ([58.214.24.6]:18733 "EHLO intranet.asianux.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755498Ab3E0L5w (ORCPT ); Mon, 27 May 2013 07:57:52 -0400 Sender: linux-arch-owner@vger.kernel.org List-ID: To: chris@zankel.net, jcmvbkbc@gmail.com Cc: linux-xtensa@linux-xtensa.org, "linux-kernel@vger.kernel.org" , Linux-Arch When compiling with 'allmodconfig', some of drivers need cmpxchg64(), xtensa does not supply 64-bit implementation for 'xchg', so use the 'generic' implementation. e.g. (for next-20130527 tree): drivers/block/blockconsole.c:164:2: error: implicit declaration of fu= nction =91cmpxchg64=92 [-Werror=3Dimplicit-function-declaration] Signed-off-by: Chen Gang --- arch/xtensa/include/asm/cmpxchg.h | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/xtensa/include/asm/cmpxchg.h b/arch/xtensa/include/as= m/cmpxchg.h index d9ab131..370b26f 100644 --- a/arch/xtensa/include/asm/cmpxchg.h +++ b/arch/xtensa/include/asm/cmpxchg.h @@ -93,6 +93,7 @@ static inline unsigned long __cmpxchg_local(volatile = void *ptr, ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o= ),\ (unsigned long)(n), sizeof(*(ptr)))) #define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o= ), (n)) +#define cmpxchg64(ptr, o, n) cmpxchg64_local((ptr), (o), (n)) =20 /* * xchg_u32 --=20 1.7.7.6