[PATCH 31/67] dma-direct: make dma_direct_{alloc,free} available to other implementations

[Christoph Hellwig <hch@lst.de>]

So that they don't need to indirect through the operation vector.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/arm/mm/dma-mapping-nommu.c | 9 +++------
 include/linux/dma-direct.h      | 5 +++++
 lib/dma-direct.c                | 6 +++---
 3 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/arch/arm/mm/dma-mapping-nommu.c b/arch/arm/mm/dma-mapping-nommu.c
index 49e9831dc0f1..b4cf3e4e9d4a 100644
--- a/arch/arm/mm/dma-mapping-nommu.c
+++ b/arch/arm/mm/dma-mapping-nommu.c
@@ -11,7 +11,7 @@
 
 #include <linux/export.h>
 #include <linux/mm.h>
-#include <linux/dma-mapping.h>
+#include <linux/dma-direct.h>
 #include <linux/scatterlist.h>
 
 #include <asm/cachetype.h>
@@ -39,7 +39,6 @@ static void *arm_nommu_dma_alloc(struct device *dev, size_t 
size,
                                 unsigned long attrs)
 
 {
-       const struct dma_map_ops *ops = &dma_direct_ops;
        void *ret;
 
        /*
@@ -48,7 +47,7 @@ static void *arm_nommu_dma_alloc(struct device *dev, size_t 
size,
         */
 
        if (attrs & DMA_ATTR_NON_CONSISTENT)
-               return ops->alloc(dev, size, dma_handle, gfp, attrs);
+               return dma_direct_alloc(dev, size, dma_handle, gfp, attrs);
 
        ret = dma_alloc_from_global_coherent(size, dma_handle);
 
@@ -70,10 +69,8 @@ static void arm_nommu_dma_free(struct device *dev, size_t 
size,
                               void *cpu_addr, dma_addr_t dma_addr,
                               unsigned long attrs)
 {
-       const struct dma_map_ops *ops = &dma_direct_ops;
-
        if (attrs & DMA_ATTR_NON_CONSISTENT) {
-               ops->free(dev, size, cpu_addr, dma_addr, attrs);
+               dma_direct_free(dev, size, cpu_addr, dma_addr, attrs);
        } else {
                int ret = dma_release_from_global_coherent(get_order(size),
                                                           cpu_addr);
diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h
index 10e924b7cba7..4788bf0bf683 100644
--- a/include/linux/dma-direct.h
+++ b/include/linux/dma-direct.h
@@ -38,4 +38,9 @@ static inline void dma_mark_clean(void *addr, size_t size)
 }
 #endif /* CONFIG_ARCH_HAS_DMA_MARK_CLEAN */
 
+void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
+               gfp_t gfp, unsigned long attrs);
+void dma_direct_free(struct device *dev, size_t size, void *cpu_addr,
+               dma_addr_t dma_addr, unsigned long attrs);
+
 #endif /* _LINUX_DMA_DIRECT_H */
diff --git a/lib/dma-direct.c b/lib/dma-direct.c
index f8467cb3d89a..7e913728e099 100644
--- a/lib/dma-direct.c
+++ b/lib/dma-direct.c
@@ -33,8 +33,8 @@ static bool dma_coherent_ok(struct device *dev, phys_addr_t 
phys, size_t size)
        return phys_to_dma(dev, phys) + size <= dev->coherent_dma_mask;
 }
 
-static void *dma_direct_alloc(struct device *dev, size_t size,
-               dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
+void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
+               gfp_t gfp, unsigned long attrs)
 {
        unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
        int page_order = get_order(size);
@@ -71,7 +71,7 @@ static void *dma_direct_alloc(struct device *dev, size_t size,
        return page_address(page);
 }
 
-static void dma_direct_free(struct device *dev, size_t size, void *cpu_addr,
+void dma_direct_free(struct device *dev, size_t size, void *cpu_addr,
                dma_addr_t dma_addr, unsigned long attrs)
 {
        unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
-- 
2.14.2