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Subject[PATCH v2 3/4] dma-buf: add export symbol for dma-heap
Date
From: Hyesoo Yu <hyesoo.yu@samsung.com>

The heaps could be added as module, so some functions should
be exported to register dma-heaps. And dma-heap of module can use
cma area to allocate and free. However the function related cma
is not exported now. Let's export them for next patches.

Signed-off-by: Hyesoo Yu <hyesoo.yu@samsung.com>
Signed-off-by: Minchan Kim <minchan@kernel.org>
---
drivers/dma-buf/dma-heap.c | 2 ++
kernel/dma/contiguous.c | 1 +
mm/cma.c | 5 +++++
3 files changed, 8 insertions(+)

diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
index afd22c9dbdcf..cc6339cbca09 100644
--- a/drivers/dma-buf/dma-heap.c
+++ b/drivers/dma-buf/dma-heap.c
@@ -189,6 +189,7 @@ void *dma_heap_get_drvdata(struct dma_heap *heap)
{
return heap->priv;
}
+EXPORT_SYMBOL_GPL(dma_heap_get_drvdata);

struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info)
{
@@ -272,6 +273,7 @@ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info)
kfree(heap);
return err_ret;
}
+EXPORT_SYMBOL_GPL(dma_heap_add);

static char *dma_heap_devnode(struct device *dev, umode_t *mode)
{
diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c
index 3d63d91cba5c..7e9777119b29 100644
--- a/kernel/dma/contiguous.c
+++ b/kernel/dma/contiguous.c
@@ -58,6 +58,7 @@
#endif

struct cma *dma_contiguous_default_area;
+EXPORT_SYMBOL_GPL(dma_contiguous_default_area);

/*
* Default global CMA area size can be defined in kernel's .config.
diff --git a/mm/cma.c b/mm/cma.c
index 4459045fa717..d39cb7066b9e 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -33,6 +33,7 @@
#include <linux/io.h>
#include <linux/kmemleak.h>
#include <linux/swap.h>
+#include <linux/module.h>
#include <trace/events/cma.h>

#include "cma.h"
@@ -54,6 +55,7 @@ const char *cma_get_name(const struct cma *cma)
{
return cma->name;
}
+EXPORT_SYMBOL_GPL(cma_get_name);

static unsigned long cma_bitmap_aligned_mask(const struct cma *cma,
unsigned int align_order)
@@ -499,6 +501,7 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align,
pr_debug("%s(): returned %p\n", __func__, page);
return page;
}
+EXPORT_SYMBOL_GPL(cma_alloc);

/*
* cma_alloc_bulk() - allocate high order bulk pages from contiguous area with
@@ -609,6 +612,7 @@ int cma_alloc_bulk(struct cma *cma, unsigned int align, bool fast,

return ret;
}
+EXPORT_SYMBOL_GPL(cma_alloc_bulk);

/**
* cma_release() - release allocated pages
@@ -642,6 +646,7 @@ bool cma_release(struct cma *cma, const struct page *pages, unsigned int count)

return true;
}
+EXPORT_SYMBOL_GPL(cma_release);

int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data)
{
--
2.29.2.454.gaff20da3a2-goog
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