All the memory operations featured in this file modify/access memory
that is only accessed by the CPU. So we can assume that all the memory
barrier handling done by the completion routines is good enough for us.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
flush_signals(current);
}
- /*
- * Write to queue->storage must be visible after read from
- * queue->read
- */
- smp_mb();
-
queue->storage[queue->write & (queue->size - 1)] = header;
-
- /*
- * Write to queue->storage must be visible before write to
- * queue->write
- */
- smp_wmb();
-
queue->write++;
complete(&queue->push);
complete(&queue->push); // We haven't removed anything from the queue.
- /*
- * Read from queue->storage must be visible after read from
- * queue->write
- */
- smp_rmb();
-
return queue->storage[queue->read & (queue->size - 1)];
}
flush_signals(current);
}
- /*
- * Read from queue->storage must be visible after read from
- * queue->write
- */
- smp_rmb();
-
header = queue->storage[queue->read & (queue->size - 1)];
-
- /*
- * Read from queue->storage must be visible before write to
- * queue->read
- */
- smp_mb();
-
queue->read++;
complete(&queue->pop);