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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-01-06 00:19:07 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-06 08:33:48 -0800 |
| commit | 973bd9937569146de0917f54f05b2942f8257912 (patch) | |
| tree | 86dd796de5bf456eca904b350c9515f4795122bb /drivers/s390/char | |
| parent | 8d93c700a489eba08514222df414a23852a85d2b (diff) | |
| download | op-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/char')
| -rw-r--r-- | drivers/s390/char/sclp_quiesce.c | 2 | ||||
| -rw-r--r-- | drivers/s390/char/tape_block.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/s390/char/sclp_quiesce.c b/drivers/s390/char/sclp_quiesce.c index 83f7577..56fa691 100644 --- a/drivers/s390/char/sclp_quiesce.c +++ b/drivers/s390/char/sclp_quiesce.c @@ -32,7 +32,7 @@ do_load_quiesce_psw(void * __unused) psw_t quiesce_psw; int cpu; - if (atomic_compare_and_swap(-1, smp_processor_id(), &cpuid)) + if (atomic_cmpxchg(&cpuid, -1, smp_processor_id()) != -1) signal_processor(smp_processor_id(), sigp_stop); /* Wait for all other cpus to enter stopped state */ for_each_online_cpu(cpu) { diff --git a/drivers/s390/char/tape_block.c b/drivers/s390/char/tape_block.c index 1efc9f2..482e07e 100644 --- a/drivers/s390/char/tape_block.c +++ b/drivers/s390/char/tape_block.c @@ -65,7 +65,7 @@ static void tapeblock_trigger_requeue(struct tape_device *device) { /* Protect against rescheduling. */ - if (atomic_compare_and_swap(0, 1, &device->blk_data.requeue_scheduled)) + if (atomic_cmpxchg(&device->blk_data.requeue_scheduled, 0, 1) != 0) return; schedule_work(&device->blk_data.requeue_task); } |
