From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932444AbXHTUza (ORCPT ); Mon, 20 Aug 2007 16:55:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1764720AbXHTUwD (ORCPT ); Mon, 20 Aug 2007 16:52:03 -0400 Received: from smtp.polymtl.ca ([132.207.4.11]:32902 "EHLO smtp.polymtl.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1764623AbXHTUwB (ORCPT ); Mon, 20 Aug 2007 16:52:01 -0400 Message-Id: <20070820201828.126257914@polymtl.ca> References: <20070820201519.512791382@polymtl.ca> User-Agent: quilt/0.46-1 Date: Mon, 20 Aug 2007 16:15:33 -0400 From: Mathieu Desnoyers To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org Cc: Mathieu Desnoyers , clameter@sgi.com, gerg@uclinux.org Subject: [patch 14/23] Add cmpxchg_local to m68knommu Content-Disposition: inline; filename=add-cmpxchg-local-to-m68knommu.patch X-Poly-FromMTA: (dijkstra.casi.polymtl.ca [132.207.72.10]) at Mon, 20 Aug 2007 20:51:10 +0000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Use the new generic cmpxchg_local (disables interrupt). Also use the generic cmpxchg as fallback if SMP is not set. Signed-off-by: Mathieu Desnoyers CC: clameter@sgi.com CC: gerg@uclinux.org --- include/asm-m68knommu/system.h | 28 +++++++++++----------------- 1 file changed, 11 insertions(+), 17 deletions(-) Index: linux-2.6-lttng/include/asm-m68knommu/system.h =================================================================== --- linux-2.6-lttng.orig/include/asm-m68knommu/system.h 2007-07-20 18:36:08.000000000 -0400 +++ linux-2.6-lttng/include/asm-m68knommu/system.h 2007-07-20 19:37:02.000000000 -0400 @@ -187,26 +187,20 @@ static inline unsigned long __xchg(unsig } #endif +#include + /* - * Atomic compare and exchange. Compare OLD with MEM, if identical, - * store NEW in MEM. Return the initial value in MEM. Success is - * indicated by comparing RETURN with OLD. + * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make + * them available. */ -#define __HAVE_ARCH_CMPXCHG 1 - -static __inline__ unsigned long -cmpxchg(volatile int *p, int old, int new) -{ - unsigned long flags; - int prev; - - local_irq_save(flags); - if ((prev = *p) == old) - *p = new; - local_irq_restore(flags); - return(prev); -} +#define cmpxchg_local(ptr,o,n) \ + (__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)) +#ifndef CONFIG_SMP +#include +#endif #ifdef CONFIG_M68332 #define HARD_RESET_NOW() ({ \ -- Mathieu Desnoyers Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68