[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>
diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index f8f55cc..7b2663f 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -1396,7 +1396,7 @@
channel->ccw.cda = (__u32) __pa(iob->data);
wait_event(card->wait_q,
- atomic_compare_and_swap(0,1,&channel->irq_pending) == 0);
+ atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
QETH_DBF_TEXT(setup, 6, "noirqpnd");
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
rc = ccw_device_start(channel->ccwdev,
@@ -1463,7 +1463,7 @@
memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
wait_event(card->wait_q,
- atomic_compare_and_swap(0,1,&channel->irq_pending) == 0);
+ atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
QETH_DBF_TEXT(setup, 6, "noirqpnd");
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
rc = ccw_device_start(channel->ccwdev,
@@ -1616,7 +1616,7 @@
}
qeth_setup_ccw(&card->read, iob->data, QETH_BUFSIZE);
wait_event(card->wait_q,
- atomic_compare_and_swap(0,1,&card->read.irq_pending) == 0);
+ atomic_cmpxchg(&card->read.irq_pending, 0, 1) == 0);
QETH_DBF_TEXT(trace, 6, "noirqpnd");
rc = ccw_device_start(card->read.ccwdev, &card->read.ccw,
(addr_t) iob, 0, 0);
@@ -1882,7 +1882,7 @@
spin_unlock_irqrestore(&card->lock, flags);
QETH_DBF_HEX(control, 2, iob->data, QETH_DBF_CONTROL_LEN);
wait_event(card->wait_q,
- atomic_compare_and_swap(0,1,&card->write.irq_pending) == 0);
+ atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
qeth_prepare_control_data(card, len, iob);
if (IS_IPA(iob->data))
timer.expires = jiffies + QETH_IPA_TIMEOUT;
@@ -1924,7 +1924,7 @@
QETH_DBF_TEXT(trace, 5, "osndctrd");
wait_event(card->wait_q,
- atomic_compare_and_swap(0,1,&card->write.irq_pending) == 0);
+ atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
qeth_prepare_control_data(card, len, iob);
QETH_DBF_TEXT(trace, 6, "osnoirqp");
spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
@@ -4236,9 +4236,8 @@
QETH_DBF_TEXT(trace, 6, "dosndpfa");
/* spin until we get the queue ... */
- while (atomic_compare_and_swap(QETH_OUT_Q_UNLOCKED,
- QETH_OUT_Q_LOCKED,
- &queue->state));
+ while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
+ QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
/* ... now we've got the queue */
index = queue->next_buf_to_fill;
buffer = &queue->bufs[queue->next_buf_to_fill];
@@ -4292,9 +4291,8 @@
QETH_DBF_TEXT(trace, 6, "dosndpkt");
/* spin until we get the queue ... */
- while (atomic_compare_and_swap(QETH_OUT_Q_UNLOCKED,
- QETH_OUT_Q_LOCKED,
- &queue->state));
+ while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
+ QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
start_index = queue->next_buf_to_fill;
buffer = &queue->bufs[queue->next_buf_to_fill];
/*