Driver core: Constify struct sysfs_ops in struct kobj_type

[safe/jmp/linux-2.6] / drivers / dma / dmaengine.c

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 8f99354..87399ca 100644 (file)
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -284,7 +284,7 @@ struct dma_chan_tbl_ent {
 /**
  * channel_table - percpu lookup table for memory-to-memory offload providers
  */
-static struct dma_chan_tbl_ent *channel_table[DMA_TX_TYPE_END];
+static struct dma_chan_tbl_ent __percpu *channel_table[DMA_TX_TYPE_END];
 
 static int __init dma_channel_table_init(void)
 {
@@ -326,14 +326,7 @@ arch_initcall(dma_channel_table_init);
  */
 struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type)
 {
-       struct dma_chan *chan;
-       int cpu;
-
-       cpu = get_cpu();
-       chan = per_cpu_ptr(channel_table[tx_type], cpu)->chan;
-       put_cpu();
-
-       return chan;
+       return this_cpu_read(channel_table[tx_type]->chan);
 }
 EXPORT_SYMBOL(dma_find_channel);
 
@@ -833,6 +826,7 @@ void dma_async_device_unregister(struct dma_device *device)
                chan->dev->chan = NULL;
                mutex_unlock(&dma_list_mutex);
                device_unregister(&chan->dev->device);
+               free_percpu(chan->local);
        }
 }
 EXPORT_SYMBOL(dma_async_device_unregister);
@@ -857,7 +851,6 @@ dma_async_memcpy_buf_to_buf(struct dma_chan *chan, void *dest,
        struct dma_async_tx_descriptor *tx;
        dma_addr_t dma_dest, dma_src;
        dma_cookie_t cookie;
-       int cpu;
        unsigned long flags;
 
        dma_src = dma_map_single(dev->dev, src, len, DMA_TO_DEVICE);
@@ -876,10 +869,10 @@ dma_async_memcpy_buf_to_buf(struct dma_chan *chan, void *dest,
        tx->callback = NULL;
        cookie = tx->tx_submit(tx);
 
-       cpu = get_cpu();
-       per_cpu_ptr(chan->local, cpu)->bytes_transferred += len;
-       per_cpu_ptr(chan->local, cpu)->memcpy_count++;
-       put_cpu();
+       preempt_disable();
+       __this_cpu_add(chan->local->bytes_transferred, len);
+       __this_cpu_inc(chan->local->memcpy_count);
+       preempt_enable();
 
        return cookie;
 }
@@ -906,7 +899,6 @@ dma_async_memcpy_buf_to_pg(struct dma_chan *chan, struct page *page,
        struct dma_async_tx_descriptor *tx;
        dma_addr_t dma_dest, dma_src;
        dma_cookie_t cookie;
-       int cpu;
        unsigned long flags;
 
        dma_src = dma_map_single(dev->dev, kdata, len, DMA_TO_DEVICE);
@@ -923,10 +915,10 @@ dma_async_memcpy_buf_to_pg(struct dma_chan *chan, struct page *page,
        tx->callback = NULL;
        cookie = tx->tx_submit(tx);
 
-       cpu = get_cpu();
-       per_cpu_ptr(chan->local, cpu)->bytes_transferred += len;
-       per_cpu_ptr(chan->local, cpu)->memcpy_count++;
-       put_cpu();
+       preempt_disable();
+       __this_cpu_add(chan->local->bytes_transferred, len);
+       __this_cpu_inc(chan->local->memcpy_count);
+       preempt_enable();
 
        return cookie;
 }
@@ -955,7 +947,6 @@ dma_async_memcpy_pg_to_pg(struct dma_chan *chan, struct page *dest_pg,
        struct dma_async_tx_descriptor *tx;
        dma_addr_t dma_dest, dma_src;
        dma_cookie_t cookie;
-       int cpu;
        unsigned long flags;
 
        dma_src = dma_map_page(dev->dev, src_pg, src_off, len, DMA_TO_DEVICE);
@@ -973,10 +964,10 @@ dma_async_memcpy_pg_to_pg(struct dma_chan *chan, struct page *dest_pg,
        tx->callback = NULL;
        cookie = tx->tx_submit(tx);
 
-       cpu = get_cpu();
-       per_cpu_ptr(chan->local, cpu)->bytes_transferred += len;
-       per_cpu_ptr(chan->local, cpu)->memcpy_count++;
-       put_cpu();
+       preempt_disable();
+       __this_cpu_add(chan->local->bytes_transferred, len);
+       __this_cpu_inc(chan->local->memcpy_count);
+       preempt_enable();
 
        return cookie;
 }