diff options
| author |   Geert Uytterhoeven <geert@linux-m68k.org> | 2018-03-16 14:25:43 +0100 |
|---|---|---|
| committer |   Christoph Hellwig <hch@lst.de> | 2018-03-16 19:58:27 +0100 |
| commit | c1ce6c2beea38171a57c56e55875318cef9a2ad5 (patch) | |
| tree | cbd8591cc2b16c4142c07769d9fd76a145948637 /include/linux/dmapool.h | |
| parent | dma-coherent: Add NO_DMA dummies for managed DMA API (diff) | |
| download | linux-dev-c1ce6c2beea38171a57c56e55875318cef9a2ad5.tar.xz linux-dev-c1ce6c2beea38171a57c56e55875318cef9a2ad5.zip | |
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>
Diffstat (limited to 'include/linux/dmapool.h')
| -rw-r--r-- | include/linux/dmapool.h | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/include/linux/dmapool.h b/include/linux/dmapool.h index 53ba737505df..f632ecfb4238 100644 --- a/include/linux/dmapool.h +++ b/include/linux/dmapool.h @@ -16,6 +16,8 @@ struct device; +#ifdef CONFIG_HAS_DMA + struct dma_pool *dma_pool_create(const char *name, struct device *dev, size_t size, size_t align, size_t allocation); @@ -23,13 +25,6 @@ void dma_pool_destroy(struct dma_pool *pool); void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle); - -static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags, - dma_addr_t *handle) -{ - return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle); -} - void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr); /* @@ -39,5 +34,26 @@ struct dma_pool *dmam_pool_create(const char *name, struct device *dev, size_t size, size_t align, size_t allocation); void dmam_pool_destroy(struct dma_pool *pool); +#else /* !CONFIG_HAS_DMA */ +static inline struct dma_pool *dma_pool_create(const char *name, + struct device *dev, size_t size, size_t align, size_t allocation) +{ return NULL; } +static inline void dma_pool_destroy(struct dma_pool *pool) { } +static inline void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, + dma_addr_t *handle) { return NULL; } +static inline void dma_pool_free(struct dma_pool *pool, void *vaddr, + dma_addr_t addr) { } +static inline struct dma_pool *dmam_pool_create(const char *name, + struct device *dev, size_t size, size_t align, size_t allocation) +{ return NULL; } +static inline void dmam_pool_destroy(struct dma_pool *pool) { } +#endif /* !CONFIG_HAS_DMA */ + +static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags, + dma_addr_t *handle) +{ + return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle); +} + #endif |