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Mon, 16 Jun 2025 04:18:37 -0700 (PDT) From: James Clark To: hch@lst.de Cc: olteanv@gmail.com, broonie@kernel.org, oe-kbuild-all@lists.linux.dev, arnd@arndb.de, larisa.grigore@nxp.com, Frank.li@nxp.com, linux-spi@vger.kernel.org, imx@lists.linux.dev, linux-kernel@vger.kernel.org, James Clark , kernel test robot , Marek Szyprowski , Robin Murphy , iommu@lists.linux.dev Subject: [PATCH] dma-mapping: Stub out dma_{alloc,free,map}_pages() API Date: Mon, 16 Jun 2025 12:17:49 +0100 Message-Id: <20250616111749.316413-1-james.clark@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <202506160036.t9VDxF6p-lkp@intel.com> References: <202506160036.t9VDxF6p-lkp@intel.com> Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The implementations are in mapping.c which requires HAS_DMA so stub them out if not present. This is required for some drivers to pass randconfig builds. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202506160036.t9VDxF6p-lkp@intel.com/ Signed-off-by: James Clark --- include/linux/dma-mapping.h | 28 +++++++++++++++++++++------- 1 file changed, 21 insertions(+), 7 deletions(-) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 55c03e5fe8cb..766f28a0e11f 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -161,6 +161,12 @@ void *dma_vmap_noncontiguous(struct device *dev, size_t size, void dma_vunmap_noncontiguous(struct device *dev, void *vaddr); int dma_mmap_noncontiguous(struct device *dev, struct vm_area_struct *vma, size_t size, struct sg_table *sgt); +struct page *dma_alloc_pages(struct device *dev, size_t size, + dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp); +void dma_free_pages(struct device *dev, size_t size, struct page *page, + dma_addr_t dma_handle, enum dma_data_direction dir); +int dma_mmap_pages(struct device *dev, struct vm_area_struct *vma, + size_t size, struct page *page); #else /* CONFIG_HAS_DMA */ static inline dma_addr_t dma_map_page_attrs(struct device *dev, struct page *page, size_t offset, size_t size, @@ -291,6 +297,21 @@ static inline int dma_mmap_noncontiguous(struct device *dev, { return -EINVAL; } +static inline struct page *dma_alloc_pages(struct device *dev, size_t size, + dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp) +{ + return NULL; +} +static inline void dma_free_pages(struct device *dev, size_t size, + struct page *page, dma_addr_t dma_handle, + enum dma_data_direction dir) +{ +} +static inline int dma_mmap_pages(struct device *dev, struct vm_area_struct *vma, + size_t size, struct page *page) +{ + return -EINVAL; +} #endif /* CONFIG_HAS_DMA */ #ifdef CONFIG_IOMMU_DMA @@ -438,13 +459,6 @@ static inline bool dma_need_unmap(struct device *dev) } #endif /* !CONFIG_HAS_DMA || !CONFIG_DMA_NEED_SYNC */ -struct page *dma_alloc_pages(struct device *dev, size_t size, - dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp); -void dma_free_pages(struct device *dev, size_t size, struct page *page, - dma_addr_t dma_handle, enum dma_data_direction dir); -int dma_mmap_pages(struct device *dev, struct vm_area_struct *vma, - size_t size, struct page *page); - static inline void *dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp) { -- 2.34.1