As we try to enable dma-buf heaps, and the CMA one in particular, to compile as modules, we need to export dev_get_cma_area(). It's currently implemented as an inline function that returns either the content of device->cma_area or dma_contiguous_default_area.
Thus, it means we need to export dma_contiguous_default_area, which isn't really something we want any module to have access to. Instead, let's make dev_get_cma_area() a proper function we will be able to export so we can avoid exporting dma_contiguous_default_area. Signed-off-by: Maxime Ripard <[email protected]> --- include/linux/dma-map-ops.h | 15 +++++++-------- kernel/dma/contiguous.c | 8 ++++++++ 2 files changed, 15 insertions(+), 8 deletions(-) diff --git a/include/linux/dma-map-ops.h b/include/linux/dma-map-ops.h index 3007c68a8ec5b85990d1938d04a2f05c1a71acdb..6b8e6a2a08e2cb380de764bd6cacb2cb24c22871 100644 --- a/include/linux/dma-map-ops.h +++ b/include/linux/dma-map-ops.h @@ -91,16 +91,11 @@ static inline void set_dma_ops(struct device *dev, #endif /* CONFIG_ARCH_HAS_DMA_OPS */ #ifdef CONFIG_DMA_CMA extern struct cma *dma_contiguous_default_area; -static inline struct cma *dev_get_cma_area(struct device *dev) -{ - if (dev && dev->cma_area) - return dev->cma_area; - return dma_contiguous_default_area; -} +struct cma *dev_get_cma_area(struct device *dev); void dma_contiguous_reserve(phys_addr_t addr_limit); int __init dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base, phys_addr_t limit, struct cma **res_cma, bool fixed); @@ -110,11 +105,10 @@ bool dma_release_from_contiguous(struct device *dev, struct page *pages, int count); struct page *dma_alloc_contiguous(struct device *dev, size_t size, gfp_t gfp); void dma_free_contiguous(struct device *dev, struct page *page, size_t size); void dma_contiguous_early_fixup(phys_addr_t base, unsigned long size); -struct cma *dma_contiguous_get_reserved_region(unsigned int idx); #else /* CONFIG_DMA_CMA */ static inline struct cma *dev_get_cma_area(struct device *dev) { return NULL; } @@ -149,15 +143,20 @@ static inline void dma_free_contiguous(struct device *dev, struct page *page, __free_pages(page, get_order(size)); } static inline void dma_contiguous_early_fixup(phys_addr_t base, unsigned long size) { } +#endif /* CONFIG_DMA_CMA*/ + +#if defined(CONFIG_DMA_CMA) && defined(CONFIG_OF_RESERVED_MEM) +struct cma *dma_contiguous_get_reserved_region(unsigned int idx); +#else static inline struct cma *dma_contiguous_get_reserved_region(unsigned int idx) { return NULL; } -#endif /* CONFIG_DMA_CMA*/ +#endif #ifdef CONFIG_DMA_DECLARE_COHERENT int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, dma_addr_t device_addr, size_t size); void dma_release_coherent_memory(struct device *dev); diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c index 14bd54fb758537f01a6fe27318e7b683964e20b1..9a9ed7248fb823105609c5db5a51113e54a40192 100644 --- a/kernel/dma/contiguous.c +++ b/kernel/dma/contiguous.c @@ -99,10 +99,18 @@ early_param("cma", early_cma); bool __init cma_skip_dt_default_reserved_mem(void) { return size_cmdline != -1; } +struct cma *dev_get_cma_area(struct device *dev) +{ + if (dev && dev->cma_area) + return dev->cma_area; + + return dma_contiguous_default_area; +} + #ifdef CONFIG_DMA_NUMA_CMA static struct cma *dma_contiguous_numa_area[MAX_NUMNODES]; static phys_addr_t numa_cma_size[MAX_NUMNODES] __initdata; static struct cma *dma_contiguous_pernuma_area[MAX_NUMNODES]; -- 2.53.0
