From 973bd9937569146de0917f54f05b2942f8257912 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Fri, 6 Jan 2006 00:19:07 -0800 Subject: [PATCH] s390: atomic primitives Hugh Dickins Fix the broken atomic_cmpxchg primitive. Add atomic_sub_and_test, atomic64_sub_return, atomic64_sub_and_test, atomic64_cmpxchg, atomic64_add_unless and atomic64_inc_not_zero. Replace old style atomic_compare_and_swap by atomic_cmpxchg. Shorten the whole header by defining most primitives with the two inline functions atomic_add_return and atomic_sub_return. In addition this patch contains the s390 related fixes of Hugh's "mm: fill arch atomic64 gaps" patch. Signed-off-by: Martin Schwidefsky Signed-off-by: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/s390/cio/ccwgroup.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/s390/cio/ccwgroup.c') diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c index be9d2d65c22f..e849289d4f3c 100644 --- a/drivers/s390/cio/ccwgroup.c +++ b/drivers/s390/cio/ccwgroup.c @@ -1,7 +1,7 @@ /* * drivers/s390/cio/ccwgroup.c * bus driver for ccwgroup - * $Revision: 1.32 $ + * $Revision: 1.33 $ * * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, * IBM Corporation @@ -263,7 +263,7 @@ ccwgroup_set_online(struct ccwgroup_device *gdev) struct ccwgroup_driver *gdrv; int ret; - if (atomic_compare_and_swap(0, 1, &gdev->onoff)) + if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0) return -EAGAIN; if (gdev->state == CCWGROUP_ONLINE) { ret = 0; @@ -289,7 +289,7 @@ ccwgroup_set_offline(struct ccwgroup_device *gdev) struct ccwgroup_driver *gdrv; int ret; - if (atomic_compare_and_swap(0, 1, &gdev->onoff)) + if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0) return -EAGAIN; if (gdev->state == CCWGROUP_OFFLINE) { ret = 0; -- cgit v1.2.3