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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2006-01-06 00:19:07 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:33:48 -0800
commit973bd9937569146de0917f54f05b2942f8257912 (patch)
tree86dd796de5bf456eca904b350c9515f4795122bb /drivers/s390/cio/ccwgroup.c
parent8d93c700a489eba08514222df414a23852a85d2b (diff)
downloadop-kernel-dev-973bd9937569146de0917f54f05b2942f8257912.zip
op-kernel-dev-973bd9937569146de0917f54f05b2942f8257912.tar.gz
[PATCH] s390: atomic primitives
Hugh Dickins <hugh@veritas.com> 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 <schwidefsky@de.ibm.com> Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/s390/cio/ccwgroup.c')
-rw-r--r--drivers/s390/cio/ccwgroup.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index be9d2d6..e849289 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;
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