mm: Add NO_DMA dummies for DMA pool API
Add dummies for dma{,m}_pool_{create,destroy,alloc,free}(), to allow compile-testing if NO_DMA=y. This prevents the following from showing up later: ERROR: "dma_pool_destroy" [drivers/usb/mtu3/mtu3.ko] undefined! ERROR: "dma_pool_free" [drivers/usb/mtu3/mtu3.ko] undefined! ERROR: "dma_pool_alloc" [drivers/usb/mtu3/mtu3.ko] undefined! ERROR: "dma_pool_create" [drivers/usb/mtu3/mtu3.ko] undefined! ERROR: "dma_pool_destroy" [drivers/scsi/hisi_sas/hisi_sas_main.ko] undefined! ERROR: "dma_pool_free" [drivers/scsi/hisi_sas/hisi_sas_main.ko] undefined! ERROR: "dma_pool_alloc" [drivers/scsi/hisi_sas/hisi_sas_main.ko] undefined! ERROR: "dma_pool_create" [drivers/scsi/hisi_sas/hisi_sas_main.ko] undefined! ERROR: "dma_pool_alloc" [drivers/mailbox/bcm-pdc-mailbox.ko] undefined! ERROR: "dma_pool_free" [drivers/mailbox/bcm-pdc-mailbox.ko] undefined! ERROR: "dma_pool_create" [drivers/mailbox/bcm-pdc-mailbox.ko] undefined! ERROR: "dma_pool_destroy" [drivers/mailbox/bcm-pdc-mailbox.ko] undefined! Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Mark Brown <broonie@kernel.org> Acked-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
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@ -16,6 +16,8 @@
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struct device;
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#ifdef CONFIG_HAS_DMA
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struct dma_pool *dma_pool_create(const char *name, struct device *dev,
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size_t size, size_t align, size_t allocation);
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@ -23,13 +25,6 @@ void dma_pool_destroy(struct dma_pool *pool);
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void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
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dma_addr_t *handle);
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static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags,
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dma_addr_t *handle)
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{
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return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle);
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}
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void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr);
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/*
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@ -39,5 +34,26 @@ struct dma_pool *dmam_pool_create(const char *name, struct device *dev,
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size_t size, size_t align, size_t allocation);
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void dmam_pool_destroy(struct dma_pool *pool);
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#else /* !CONFIG_HAS_DMA */
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static inline struct dma_pool *dma_pool_create(const char *name,
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struct device *dev, size_t size, size_t align, size_t allocation)
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{ return NULL; }
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static inline void dma_pool_destroy(struct dma_pool *pool) { }
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static inline void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
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dma_addr_t *handle) { return NULL; }
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static inline void dma_pool_free(struct dma_pool *pool, void *vaddr,
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dma_addr_t addr) { }
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static inline struct dma_pool *dmam_pool_create(const char *name,
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struct device *dev, size_t size, size_t align, size_t allocation)
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{ return NULL; }
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static inline void dmam_pool_destroy(struct dma_pool *pool) { }
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#endif /* !CONFIG_HAS_DMA */
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static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags,
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dma_addr_t *handle)
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{
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return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle);
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}
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#endif
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