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[PATCH] s390: atomic primitives

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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>
This commit is contained in:
Martin Schwidefsky
2006-01-06 00:19:07 -08:00
committed by Linus Torvalds
parent 8d93c700a4
commit 973bd99375
10 changed files with 97 additions and 132 deletions
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8
drivers/s390/net/iucv.c
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@@ -1,5 +1,5 @@
/*
* $Id: iucv.c,v 1.45 2005/04/26 22:59:06 braunu Exp $
* $Id: iucv.c,v 1.47 2005/11/21 11:35:22 mschwide Exp $
*
* IUCV network driver
*
@@ -29,7 +29,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* RELEASE-TAG: IUCV lowlevel driver $Revision: 1.45 $
* RELEASE-TAG: IUCV lowlevel driver $Revision: 1.47 $
*
*/
@@ -355,7 +355,7 @@ do { \
static void
iucv_banner(void)
{
char vbuf[] = "$Revision: 1.45 $";
char vbuf[] = "$Revision: 1.47 $";
char *version = vbuf;
if ((version = strchr(version, ':'))) {
@@ -477,7 +477,7 @@ grab_param(void)
ptr++;
if (ptr >= iucv_param_pool + PARAM_POOL_SIZE)
ptr = iucv_param_pool;
} while (atomic_compare_and_swap(0, 1, &ptr->in_use));
} while (atomic_cmpxchg(&ptr->in_use, 0, 1) != 0);
hint = ptr - iucv_param_pool;
memset(&ptr->param, 0, sizeof(ptr->param));