This removes several pointless exports from drivers/dma/dmaengine.c;
the dma_async_memcpy_*() functions are inlined by <linux/dmaengine.h>
so those exports are inappropriate.
It also moves the existing EXPORT_SYMBOL declarations next to their
functions, so it's now trivial to confirm one-to-one correspondence
between exports and nonstatic symbols.
Signed-off-by: David Brownell <[email protected]>
---
By the way ... I'm sure that I'm not the only one to observe how odd it
is that a "DMA Engine" framework is purely a memcpy() offload engine.
It overlooks the primary use of DMA in Linux: peripheral I/O, which
may well involve the same kind of dual-access engines this framework
assumes. DMA controllers on embedded Linuxes commonly support a few
dozen logical DMA channels supporting hardware-synchronized transfers
to/from most peripheral devices. Memory-to-memory DMA would often
also work ... but wouldn't address IRQ rate issues of PIO drivers.
drivers/dma/dmaengine.c | 18 ++++++------------
1 files changed, 6 insertions(+), 12 deletions(-)
Index: g26/drivers/dma/dmaengine.c
===================================================================
--- g26.orig/drivers/dma/dmaengine.c 2007-01-22 09:19:27.000000000 -0800
+++ g26/drivers/dma/dmaengine.c 2007-01-22 09:19:29.000000000 -0800
@@ -176,6 +176,7 @@ void dma_chan_cleanup(struct kref *kref)
chan->client = NULL;
kref_put(&chan->device->refcount, dma_async_device_cleanup);
}
+EXPORT_SYMBOL(dma_chan_cleanup);
static void dma_chan_free_rcu(struct rcu_head *rcu)
{
@@ -261,6 +262,7 @@ struct dma_client *dma_async_client_regi
return client;
}
+EXPORT_SYMBOL(dma_async_client_register);
/**
* dma_async_client_unregister - unregister a client and free the &dma_client
@@ -287,6 +289,7 @@ void dma_async_client_unregister(struct
kfree(client);
dma_chans_rebalance();
}
+EXPORT_SYMBOL(dma_async_client_unregister);
/**
* dma_async_client_chan_request - request DMA channels
@@ -304,6 +307,7 @@ void dma_async_client_chan_request(struc
client->chans_desired = number;
dma_chans_rebalance();
}
+EXPORT_SYMBOL(dma_async_client_chan_request);
/**
* dma_async_device_register - registers DMA devices found
@@ -346,6 +350,7 @@ int dma_async_device_register(struct dma
return 0;
}
+EXPORT_SYMBOL(dma_async_device_register);
/**
* dma_async_device_cleanup - function called when all references are released
@@ -390,23 +395,12 @@ void dma_async_device_unregister(struct
kref_put(&device->refcount, dma_async_device_cleanup);
wait_for_completion(&device->done);
}
+EXPORT_SYMBOL(dma_async_device_unregister);
static int __init dma_bus_init(void)
{
mutex_init(&dma_list_mutex);
return class_register(&dma_devclass);
}
-
subsys_initcall(dma_bus_init);
-EXPORT_SYMBOL(dma_async_client_register);
-EXPORT_SYMBOL(dma_async_client_unregister);
-EXPORT_SYMBOL(dma_async_client_chan_request);
-EXPORT_SYMBOL(dma_async_memcpy_buf_to_buf);
-EXPORT_SYMBOL(dma_async_memcpy_buf_to_pg);
-EXPORT_SYMBOL(dma_async_memcpy_pg_to_pg);
-EXPORT_SYMBOL(dma_async_memcpy_complete);
-EXPORT_SYMBOL(dma_async_memcpy_issue_pending);
-EXPORT_SYMBOL(dma_async_device_register);
-EXPORT_SYMBOL(dma_async_device_unregister);
-EXPORT_SYMBOL(dma_chan_cleanup);
-
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